s-10 283 tbi conversion

Sup guys!!.. I been working on my 283 tbi conversion and finally have it running.. now comes the tuning process..It runs but not good... this is a complete Frankenstein setup... let me start off with the engine is a 283 bored over .060. The heads are from a 89 305 tbi pickup... has edelbrock rpm intake and a crane compucam with .494 lift I believe (I have the cam card around here somewherr)... got a 700r4 tranny with a ford 9 rear with 3.50 gears..

So.... I used a painlesswiring tbi harness for the install... has the orange colored injectors from a 350... tbi bores have been opened some with new butterflies and thinned throttle shaft with an adjustable regulator... The 747 ecu has been modded to a writable chip...I have the autoprom and tunerpro rt as you guys helped on tuning my other truck...

The truck is not on the road so for right id like to tune what I can in the driveway...so im sure 18psi is way to much so I gotta change the spring... im starting with a bin from a 305 tbi... the bpw is set to 100... I havent changed any of the tables yet but turned off all things for good blm's...Im not sure where to start with things so far out!! What you guys think?

Three things that help me understand what is happening with the TBI system.
1. TunerPro RT .xdl data log file of the engine running.
2. TunerPro RT .adx file your using.
3. The .bin file your using.

If you post these files, I should be able to help.

dave w

ok i got a log file... adx,xdf,bin and log...first thing i see is the blms are not changing..not sure why...then after about 45 seconds the data stream stops and it runs very bad...so i thought it maybe cause of the gauge cluster i had wired in from the 95 donor vehicle so i unplugged it ran ran it again...this time i got a few mins of run time befor the data stream stopped..so thats the log i posted..i knoiw not up to running temp but i cant keep it running long enough...when i shut the key off and restart the engine it runns fine again for another few mins befor data stops again...when you watch the log youll see what i mean..perhaps a wiring problem??.. I am using the same pc and auto prom that i used on the other truck so i know thats not the problem...

opps...didnt change the mask id to AA...

so changing the mask id did nothing..blms still not changing...did another log which ended with it stalling..and the check engine light is blinking like its giving a code...

was i suppose to have data tracing on?

also i see error 51-prom...

I think maybe the flash chip modification to the 7747 might need a closer look to see if everything is 100% correct. There is absolutely no room for any kind of error when doing a '7747 flash chip modification.

The two attached screen shots are why I think the flash chip modification might have something not correct.

If the vehicle was in my shop, here is what I'd do
1. Install a known good '7747 ECM with a custom 283 chip.
2. Maybe you can borrow a known good '7747 ECM with a stock 305 chip?

dave w

ok dave... i grabbed a bin from this site and started over..did a new log and no prom error this time take a look...but still blms not moveing...i have another ecm i can use although this is a brand new ecm that i modded...it runs much better with this bin. didnt stall either...isnt aldl mode suppose to be disabled cause its not...factory test and diagnostic modes are disabled...forgot how to disable aldl mode

had issues finding the file!

ok i grabbed another ecu from a running truck...has stock chip in it anlw 5469.. heres the log

I'll have to look at these files later, my lunch break at work is over.

dave w

ok thanks for you help!

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Originally Posted by hammertime371

ok i grabbed another ecu from a running truck...has stock chip in it anlw 5469.. heres the log

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Seems maybe there is something else wrong. The stock bin log.xdl showed the same errors at the end of the log.

What might be wrong, I can't see in the data log.

dave w

Is because I shut the engine off befor I stopped the log??

While it was running there was no errors that I saw. The prom problem I had earlier is gone with the new bin. It ran for a good 5 mins without it shutting off. I do remember eaglemark had me disable Aldl mode. I see there there are some newer definition files. Think ill check them out

So reviewed some of my old posts and forgot to switch the switch on the autoprom to disable aldl

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Originally Posted by hammertime371

So reviewed some of my old posts and forgot to switch the switch on the autoprom to disable aldl

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I use an Ostrich 2, not Autoprom. I always stop the data log before I turn off the engine.

I think knowing the exact injector flow is always a good plan when figuring the BPW.

Glad to hear the new .bin is helping.

dave w

So I got aldl mode disabled...now I should get good blms but still they dont move off 128...this painless wiring isnt so painless..lol...and to boot after 5 mins of wrming it up it goes into limp mode again...very strange

Alright went back to bone stock ecu and chip...ran for another 10 mins or so and finnaly the blms started changing...the modded ecu must have an issue...gonna take a look at it and see if there some solder where there shouldnt be any..

Quote:

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Originally Posted by hammertime371

Alright went back to bone stock ecu and chip...ran for another 10 mins or so and finnaly the blms started changing...the modded ecu must have an issue...gonna take a look at it and see if there some solder where there shouldnt be any..

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Good plan.

Usually BLM's will be 128 until the ECM goes closed loop.

dave w

yes once it goes closed loop then blms are now moving!!... did another couple logs.. got another ecu modded and warmed up and ran for 15 mins.. no problems with prom or limp mode like befor so i think im good that way... blms mostly pegged at 108 so im gussing thats to rich.. backfires through carb when a rev is attemted. i checked to make sure distibutor is timed at 0 like it should be. anyway it dont stay closed loop.. does for a while then goes open and then goes closed again..If you could take a look at the logs and maybe we can adjust the bin a bit.. i did 1 log after the other and the engine never was shut off between them..

you might try this bin, it is for a 262 standard trans.it may lean your blms ? I changed the cylinder count to 8 I don't know about changing to aa to use a auto prom.

changing the mask id i believe was only for the bpw/tps/spark advance hack for definition file. id be happy to try it but i dont see a file posted..

sorry about that.

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Originally Posted by ony

sorry about that.

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That might not be a good plan. See attached screen shot showing the BPW calculations V6 vs. V8 for the posted fair 4 a 262.bin file.

Changing the cylinder number from 6 cylinders to 8 cylinders might or might not have the same effect on the actual BPW?

I think the ECM is going to supply a BPW of 181 for an 8 cylinder engine, that would extremely rich!

dave w

I never thought about that, I did see a rich o2 code in his data log it never went below .500 .

that is a good bin for my truck,i would love to have a auto prom or ostrich to tune on the fly.probly around 155-160 bpw would be about a starting point for a 283 v8 with this bin.

I took a look at this bin and seams the tables would be pushing way to much fuel unless your running a ton of advance. what is the fuel pressure you are running with this bin ony? im at 16psi at idle and it drops to 14psi when revved...and thats with the stock spring...it wont go any lower with the adjustable regulator...the injector sizing spreed sheet says the orange injectors flow 61 of fuel... i dont have any others to use so with 16psi of fuel pressure that should give me a bpw around 113 to start with. the spark table matches the headls im using but not the cam so im sure theres some tweeking needed there. the knock counts are low so perhaps i should pull some fuel out and add some advance to my bin. what would ya normaly do first adjust fuel or spark??

I would adjust the blms then add or subtract timming. when you first start your engine watch the o2 voltage and see if it is below .445, in your data log I never seen it go below .500. it my be because it is running rich or the o2 sensor might be going out.i have 12psi fuel that bin is for a v6 I wasn't thinking I thought 283 was closer to 262 than 305.

its bored over .060 so closer to 305 for sure! I made some changes to the VE with what little data I got and see. it will be a few days before ill have time to mess with it again