BCC Find still down?

[Zefyr]

Reason I ask is found a peculiar bcc that iirc came from a 95 k1500 5.7 5spd, but I am not sure. The reason it is peculiar is that it has 3 letters and a number. BHA8 I did not, regrettably, take note of what ecm I took this prom from.

I tried searching known ASDU and got the same error.

I am converting a C1500 w/NV3500(MG5) from 4.3L to a stock 5.7 tbi. I should have checked my truck to see what ECM it had before making the 300 mile journey to the junkyards in Vegas. Not knowing what ecm I had, I grabbed several proms from differing ecm/engine/trans combos, and even got a 6396 BDUJ complete ecm. Turns out I have a 7427 ecm with the 4.3 m/t BJFD. According to my searching, the 7427 can run several different codemasks from other ecm's. I am hoping someone knows what this BHA8. Just to be sure I'm not blind I have attached a pic with both proms. If anyone wants the 6396 PM me, it will just sit on my parts shelf until then.
8558

[Six_Shooter]

Yes, BCC find is still down.

That's actually BHAS. 1993 5.7 Auto

[Zefyr]

Damn, Guess I'll be heading back to Vegas. I'm kinda nervous about removing/installing the prom in this setup.

[Zefyr]

Anyone want to sell one for a stock TBI 5.7 MG5 3.42 rear?

[JeepsAndGuns]

The 16197427 never had a 5.7 manual trans combo. All the 5.7 manuals had a different ecm.
You can still run a 5.7 manual with the 7427, but you will need to do a little tuning. I am running a manual trans on my 7427 conversion in my jeep.

[ony]

do you have a shift light on your jeep?

[Zefyr]

I am well aware of the 7747 and what can be done with it. I am still running one in my V8 converted S10. For this truck I am looking to keep it plug and play as it will not stay with me for long. I can buy a new prom with proper code for the 5.7 m/t from cardone. The 5.7 is completely stock and I have no plans to change that.

[1project2many]

I don't know who mentioned the 7747 or why you replied in such a manner. But if Cardone has a part number for a prom that was used with the 7427 with 5.7 and MG5 trans, you'd better order it because GM has no record of such a beast. JeepsandGuns has literally been down this road with the 7427 plus manual and he might have some tips based on experience to help if you're looking to use that computer or one of its close cousins. You can read this thread regarding the 7427 and manual trans: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?558-6395-7427-8625-Manual-Trans-Calibration-Listing

FYI, Here is the list of L05 plus MG5 calibrations for 93-95 showing only ECM's.

***Found!!!
BCC year is 1993

BCC= AZDP9898 Scan id= 9041 Part number= 16169897
Release date= 12/17/91 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #16156480
Used in trucks: GMC
Possibly used in:
C1500,2WD,1/2 TON C1500,2WD,1/2 TON C2500,2WD,3/4 TON
C2500,2WD,3/4 TON K1500,4WD,1/2 TON K1500,4WD,1/2 TON
K2500,4WD,3/4 TON K2500,4WD,3/4 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With MG5 MAN 5 SPD GETRAG 84MM 4.00 1ST
With NA5 FEDERAL REQUIREMENTS
With NA6 ALTITUDE REQUIREMENTS
Without NM8 EMISSION SYSTEM, LEADED FUEL

***Found!!!
BCC year is 1993

BCC= AZDR9917 Scan id= 9051 Part number= 16169916
Release date= 12/17/91 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #16156480
Used in trucks: GMC
Possibly used in:
C1500,2WD,1/2 TON C1500,2WD,1/2 TON C2500,2WD,3/4 TON
C2500,2WD,3/4 TON K1500,4WD,1/2 TON K1500,4WD,1/2 TON
K2500,4WD,3/4 TON K2500,4WD,3/4 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With MG5 MAN 5 SPD GETRAG 84MM 4.00 1ST
With NB2 CALIFORNIA REQUIREMENTS

***Found!!!
BCC year is 1993

BCC= BAKP5142 Scan id= 4701 Part number= 16175140
Release date= 12/17/91 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #16156480
Used in trucks: GMC
Possibly used in:
C1500,2WD,1/2 TON C1500,2WD,1/2 TON C2500,2WD,3/4 TON
C2500,2WD,3/4 TON K1500,4WD,1/2 TON K1500,4WD,1/2 TON
K2500,4WD,3/4 TON K2500,4WD,3/4 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With MG5 MAN 5 SPD GETRAG 84MM 4.00 1ST
With MT8 MAN 5 SPD NEW PROCESS 109MM 6.34
With NA1 EMISSION SYSTEM, LESS THAN 8500 LB GVW
With NM8 EMISSION SYSTEM, LEADED FUEL

***Found!!!
BCC year is 1994

BCC= BDUY8911 Scan id= 9025 Part number= 16188910
Release date= 08/25/93 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #16196396
Used in trucks: GMC
Possibly used in:
C1500,2WD,1/2 TON C1500,2WD,1/2 TON C2500,2WD,3/4 TON
C2500,2WD,3/4 TON K1500,4WD,1/2 TON K1500,4WD,1/2 TON
K2500,4WD,3/4 TON K2500,4WD,3/4 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With MG5 MAN 5 SPD GETRAG 84MM 4.00 1ST
Without NM8 EMISSION SYSTEM, LEADED FUEL

***Found!!!
BCC year is 1995

BCC= BDWB8923 Scan id= 9055 Part number= 16188922
Release date= 11/23/92 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #16171199
Used in trucks: GMC
Possibly used in:
C1500,2WD,1/2 TON C1500,2WD,1/2 TON C2500,2WD,3/4 TON
C2500,2WD,3/4 TON K1500,4WD,1/2 TON K1500,4WD,1/2 TON
K2500,4WD,3/4 TON K2500,4WD,3/4 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With MG5 MAN 5 SPD GETRAG 84MM 4.00 1ST
With MW3 MAN 5 SPD NEW VENTURE GEAR 109MM 5.61 1ST O/D
With NA1 EMISSION SYSTEM, LESS THAN 8500 LB GVW
With NM8 EMISSION SYSTEM, LEADED FUEL

***Found!!!
BCC year is 1995

BCC= BDUY8911 Scan id= 9025 Part number= 16188910
Release date= 08/25/93 Engine size= 5.7 Trans Type= Manual trans
ECM/PCM: ECM #16196396
Used in trucks: GMC
Possibly used in:
C1500,2WD,1/2 TON C1500,2WD,1/2 TON C2500,2WD,3/4 TON
C2500,2WD,3/4 TON K1500,4WD,1/2 TON K1500,4WD,1/2 TON
K2500,4WD,3/4 TON K2500,4WD,3/4 TON

Options:
With L05 5.7L GAS 8 CYL (5.7K) V8 TBI
With MG5 MAN 5 SPD GETRAG 84MM 4.00 1ST
Without NM8 EMISSION SYSTEM, LEADED FUEL

[Zefyr]

I apologize if I came across wrong in my previous post. From autozones website they direct you to a 1800 number to cardone and ask that you provide the bcc and they will send a prom to you for ~$70. Big thanks on the bcc list. I will order one and if it would be of use I can get a bin from it before installing it into the truck.

[Zefyr]

Sorry JeepsAndGuns, I misread your post. I was reading it from my phone earlier. Could have sworn you mentioned the 7747 in your post. I'm still reading up on the BCC's 1project2many posted.

[Six_Shooter]

And all of the ECMs that 1project2many has posted are, as far as I can tell, more like the '7747 than the '7427, and therefore use EPROMs and not MEMCALs, so they would be pointless to look into using in a '7427.

[Zefyr]

wow, been reading more into this. Seems as though it would be easier for me to get back down to vegas and pull a harness and ecm from a 5.7/MG5 truck to convert it. Or at the very least pull as many 7427 proms as I can find to tear apart and work with. Still nervous about de-soldering the prom and soldering it back in. I know moates sells the socket adapter, but I am most likely not keeping this truck longer than it takes to get it running and sell it.

[1project2many]

If you consider that the G1 is about 1/2 the memcal from Cardone, and that you could resell it for something close to original price, the investment may be worthwhile. You could use the V8 memcal you already have and save the gas and time of another trip to Vegas.

You're planning to sell the truck... to whom? Do you have a prospective buyer? If the buyer has no knowledge of customizations and does not do his/her own in-depth repair work, please consider the plight of the next owner if the truck needs repair. A repair shop could run into trouble trying to diagnose and repair a truck in which the computer only responds to scantools that try to talk with an auto trans equipped vehicle. Most will find the truck does not respond as a 5.7 manual trans vehicle, determine from the VIN that it should be equipped with a V6, then either charge the customer more or bail out completely. If they get into the computer and find there are auto trans codes or codes for circuits / systems not installed, often they won't want to deal with a "hacked" system. If you switch to the correct ecm you'll help ensure diagnostics works as the oem expected and you'll help ensure you don't get a call asking how the heck you built the truck from an upset owner.

You already have the ecm, you only need one connector, and most of the circuits will be the same between the two vehicles. The ECM swap may not be that difficult. Without too much work, the terminals can be removed from the current connectors and moved to the connector from the 6396. If the currently installed wiring to the injectors, sensors, and other components will fit the V8 engine, possibly with only a few minor modifications, then there's no need to change complete harnesses. If you do decide to swap harnesses, you should note there are some substantial differences at the pass through fitting at the firewall and you'll want to take note of the size and shape of that before heading back to the wrecking yard. The pass through fittings are sealed together fairly well and changing from one to another can be very difficult.

OTOH, if you decide to stick with the 7427, you should start with the V6 calibration. It's already set up properly for a manual trans. Then move the V8 values to that calibration. Then program it into the '93 V8 memcal so the knock sensor works properly. If you already have the pcm and the calibration, the cost of the Moates adapter is probably less than the cost of another trip to Vegas and you could sell the G1 when you're finished to recover even more $$. If you scour Ebay and CL you might find an old Hypertech or Jet chip for cheap that you could use instead of an adapter along with an eprom, but if you don't already have the eprom that will probably put you close to the cost of the Moates part.

HTH

[Zefyr]

That is why I will gladly swap to a 5.7/MG5 ecm and harness. I want whoever ends up with the truck to be able to goto any shop and get it worked on without issue. Thus the reason I want to use stock components. I have a lead on a 5.7/MG5 harness from a friends shop, and it looks like the 6396/BDUJ ecu will work with it. It only costs ~$40 round trip to goto vegas in my Geo (wish I could tune/log it). As far as the next owner goes, I am very up front about mods and things of that nature. Being that 5.7, 5spd, 2wd, single cab, short box, a/c, pw, pl, is a hard truck to find, I'm sure someone will appreciate it more than I will even with the transplant.

[Zefyr]

I still can't get BCC find to work. Is something wrong with it? Trying to find info on BDUJ

[fastacton]

Try this:

http://www.gearhead-efi.com/Fuel-Injection/showthread.php?3609-BCCLookup-XLS-and-Text-File&highlight=bcclookup

[1project2many]

I still can't get BCC find to work. Is something wrong with it? Trying to find info on BDUJ

BCCFind is broken. If the info you're looking for is not in the spreadsheet, lmk and I'll look it up.

[Zefyr]

Found the info I was looking for and saved copies to my phone. Going to Vegas in the AM to pull an ecm/harness and a flywheel. Still waiting on a lot of parts in the mail. I am as far along on this project as I can go until I get the other parts in. Anyone have requests for an ecm/prom/memcal while I'm there?

[Zefyr]

Well, I have some days off and time to play with this some more. I got a complete harness and 7747 ecm from an industrial 5.7 m/t truck, but that will be used for something else down the road. I found a 8625 ecm that, as far as I can tell, uses the same pin outs as the 7427 and BDTZ would be a perfect fit. I have not been able to find a lot of info on the 8625 ecm. I was hoping someone familiar with it could chime in.

[JeepsAndGuns]

The 16168625 is basically a older version of the 16197427. I have used one in place of a 7427 (with the 7427 memcal) and had no issues.

[Zefyr]

That is great to hear! That is my plan for it. Found a BJYN bin and got it burned and resoldered to a V8 memcal. Fingers crossed. Still have more to do to the truck before I can even fire the engine. Gotta pull the fuel tank on my next days off to clean it out and install the new pump, and have to reinstall the harness after I clean it up a lil.

[Zefyr]

Ok, so I have it together and ran into a problem. The 8625 ECM is not firing the injectors. I swapped the ign module with a known good one, and checked all my grounds to the ecm. I can give the injectors 12V and they have a good spray pattern. The engine will fire if i put fuel down the TBI, but the injectors will not fire from the ECM. I am curious if the 7427 and 8625 have some differences in pinouts, but I have been unable to find a pinout sheet for the 8625 ecm to compare with the 7427. Any ideas?

[sturgillbd]

The 8625 and 7427 have no pinout difference. Make sure the connectors are seated well. Do you have 12v at the injectors? The PCM grounds the other pin on the injectors to fire them. Double check all of the power feeds like to the PCM, injectors etc.

[1project2many]

I can give the injectors 12V and they have a good spray pattern.
Yep... sounds like you need to ensure the IGN power source is present and working.

[Zefyr]

So I put my memcal with the BJYN code into the 7427 ecm, and after getting my timing sorted out, it fired right up and runs great. Only problem is that the 7427 ecm is throwing A/T codes at me. The 8625 ecm still will not fire the injectors, but it will run the engine with fuel poured into the intake. Now I'm wondering if the BIN I got was right. I will go through it in tunerpro over the next few days.

[Zefyr]

I checked for the 12V+ at the injectors. No problems there. The 8625 isn't providing the ground, but the 7427 does. Not sure what to make of it yet. I will play with it more on my next days off.

[JeepsAndGuns]

Do you have tunerpro and a way to connect/datalog? You could hook it up, and try to connect to it. Every bad ecm I have seen, I was unable to connect to it. If you can connect to it, look and see if you are getting any drp's when cranking. If the ecm doesn't see any drp's, its not gonna fire the injectors.

[Zefyr]

Yes I have Tunerpro, just have to wait till I have days off to mess with it again.

[1project2many]

So you applied 12 to the injectors and they worked, but you already have 12V at the injectors? I'm not sure this makes sense. If you're saying you connected an injector to power and ground then you probably shouldn't do that again. You can easily overheat the coil inside.

Swapping 8625 and 7427 is no problem. IIRC one part number leads to the next in GM parts books.

[Zefyr]

Applying 12V directly to injectors for bench testing and cleaning for short periods of time (60 secs or less) has never caused a problem for me. That aside, I finally got a usb ALDL cable.
Drove the truck to and from work and town a few times (60 miles round trip), it ran alright the first few times. Now once it goes closed loop it runs poorly, quick throttle movements cause intake backfire and engine dies, revs slowly, lacks power. I am going to spend some time this week digging through the code. Got a few ZIF sockets and several spare 5.7&5.0 V8 memcals, so prom swapping will be easier until I am satisfied. Still waiting for the spare $$$ to order an emulator from Moates, should be sooner than later. I assumed I was getting knock retard from exhaust leaks. Leaks are fixed now with some good gaskets and I am still getting knock retard. Not sure if the headers would cause that or not, or the fact I am still running the 1991(engine year) knock sensor from a 7747 setup. Guess I should look at the P/N as I do have a 43 code set. To-do list grows again. After cleaning this truck up and getting to drive it, I can't believe I considered sending it to the scrap yard after pulling the 4.3L. Grabbed a spare 7427 and harness for my next project. I have come to appreciate the 7427 and its capabilities after working with this one, world of difference from the slow 7747 ECM I was used to. I can't thank everyone here enough for all the useful info and input, thank you all.

[Zefyr]

Installed a ZIF socket to a 5.7 memcal. Makes prom swapping sooo much easier. Took a bit of finesse to solder in the socket, but it works! Tried disabling knock retard to at least eliminate a variable. No difference. Run quality seems to degrade about the same time ECM goes closed loop and BLMs are 150+. I am suspicious of the ebay pump now. I don't have a fuel pressure gauge, but I do have a NIB Delco pump I can swap. Will try running it with closed loop disabled to see if it makes a difference in run quality and verify P/Ns on the injectors to make sure they are 61lb. Engine came from someone with more tools than sense. Could there be something from the AT controls that could cause it to run like that? I know it effects DFCO, DFEL, and idle. The ECM does show that it is in 2nd gear all the time.

[Zefyr]

Got an ostrich from Moates! Had a chance to play around with it a little today when I got home from work and got a small log saved. Still pretty overwhelmed with this project. Played with the spark bias and injector size among other things. Seems like the exhaust runs hotter than it should, stared to melt the carpet inside the cab. Could just be the close proximity of the soon to be wrapped headers or something else is way off. Never enough hours in a day.

[fastacton]

Have you done any VE tuning yet? BLMs like that mean you're running very lean which will bump up the temps. What kind of pump are you using? Being from eBay doesn't matter, it's just a place for buyers and sellers to connect.

[Zefyr]

Have yet to do any VE tuning. I was hoping to avoid the need by using a stock TBI 5.7 L05. The pump IIRC was a 3902, I swapped the first one for an AC Delco pump, didn't make any difference. What really has me concerned, is that I drove the truck ~200 miles or so with just the A/T codes unflagged and it seemed to run alright. Only thing that changed was the exhaust started to leak from the manifold gaskets, then collector gaskets, and I replaced the gaskets and have no more exhaust leaks. As far as ebay parts go, I've had more good luck than bad luck with parts there. I did however get a weak from the box pump that had me chasing my tail tune-wise with my SBC S10 until the pump gave out completely and I changed it out. World of difference in performance and drive-ability, so I was suspicious of the pump. Before anyone suggests, the cat is hollow on this truck.

[Zefyr]

I feel stupid asking this, but where is the VE table? I have gone through everything in the XDF and have not found a VE table. I know I had one in my $42 XDF. Nevermind, I found it.

[CFI Z51]

$OD?..VE tables are under BPW Parameters

[Zefyr]

Well I found the root of my problem.... At some point my dist hold down loosened, guess what base timing was wayyy off. Explains chasing my tail with the VE table the last few hours. Glad it wasn't something worse.

[Zefyr]

Drove almost 1000 miles and towed a car home with it! No issues, other than it being really hot in Las Vegas. I will post a copy of the bin in a day or so.

[Zefyr]

So I had something odd happen... Hope someone might have an idea. I added a relay at the headlight dimmer switch to keep my low beams on with the high beams. I am running HID bulbs with ballasts for all 4 lights. When switching between high and low it will sometimes cause the idle to surge, other times it will kill the engine when switching between high and low. The driver side low beam light will also not come back on sometimes when switching from high to low, with or without the relay in play. Now for the strange part. While trying to diagnose this phantom light, and ignoring the idle issue. After a high low cycle, the engine died. When restarted I had to apply some throttle to get it to start and got a code 51 checksum failure. I decided to call it quits with the headlight relay. I could not get the code 51 to clear until I swapped ECUs. I verified the bin in the emulator, no problem. Re-uploaded the bin, no issue. Still had code 51. Swapped ECU, code went away. Swapped back to prior ECU, no code. Wtf could the headlight circuit possibly have to do with the engine harness? 94 C1500

[fastacton]

I'd say it's probably a ground issue. Make sure your headlight and EFI wiring both have good and separate grounds.

[Zefyr]

Turns out it was a bad HID bulb. Was still lighting, but one insulator cracked near the base of the bulb allowing it to arc across and backfeed through the ballast. Was causing a good voltage spike through the rest of the vehicle. Switched back to halogens for the low beams until new HID bulbs show up.