I'll teach you how to do screen shots if you teach me how to do cool EFI stuff!
I'll teach you how to do screen shots if you teach me how to do cool EFI stuff!
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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Link to optional fan control:
http://www.gearhead-efi.com/Fuel-Inj...D-efan-control
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
I'm running this code and it works great.
I would double check the code you put in, double check the addreses and parameters, then double check the wiring, make sure you have it hooked to the correct pin on the pcm.
79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy
93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver
99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.
It's been a long time since I played with this, but I think there's also another hex value that needs to be changed elsewhere to enable the code to actually function.
The man who says something is impossible, is usually interrupted by the man doing it.
i was looking at another thread http://www.gearhead-efi.com/Fuel-Inj...t=fierobsessed
it had 7c60:BD70
7c70:19
do you think these are it and be the same for this one? also in my hex editor there were alot more hex values in the same lines do i leave them as is or change them to 00 ?
Last edited by bonnieclyde100; 09-29-2014 at 10:47 PM.
i found at the top of this thread to change line 7c6F: from D399 to 7020 so i will try that first.
well except for coming on with AC it work with temp controls. not sure why its not working with AC. anyway on tunerpro to see when ac is on?
I've read a bunch of different efan mods for the $0d. They all seem to be different forks of the same code.
The challenge I've had is I have a fairly poorly documented/supported 4.3 cpi engine. I spent about 10 hours on this project so far. I completely abandoned it then stumbled on another thread where they show separate code for efan control a and efan control B. Control B uses the "air solenoid pin e7" iirc. That seems to work with ac commanded on. I've only got a probe on the pin with my emulator but everything seems to be legit.
If I install any of the code for efan control A nothing works.
I'm trying to steal an unused pin from my harness and move it over to efan controls B pin and test everything with the engine up to temp. Will advise in this thread my progress. I believe the code for the air solenoid doesn't seem to care that I have a 4.3 cpi and it should definitely work on any tbi setup.
Last edited by uhlhazard; 10-07-2014 at 07:20 PM.
HA! Got the E7 pin working!
So my troubleshooting was part of the issue. My pin E3 goes to a RELAY first, not the imtv. Well I still tested for changes on the imtv pigtail with nothing happening. Turned out my relay was bad. The 4.3 cpi 92-94 (95 possibly too) has 2 relays on the firewall on the drivers side. They are identical. The fuel pump portion is easily identifiable as it has large gauge wires compared to the imtv harness. I suppose someone smoked the fuel pump relay and just flipped the relays. When I installed my supercharger they remove the imtv and replace it with a huge rubber plug so I've never used it.
I didn't realize the bad relay until I swapped e3 to e7 then began tracing it when nothing was working. I got a good gnd signal at the ecu when desired so I knew it was a wiring issue. Checked with my service manual and that is when I realized it hit a relay first. I cut the wire from the relay and routed it to my efan solenoids now everythings working great!
The code works absolutely awesome. Now that the auxiliary efan control works I'm going to try and figure out if I can make the primary efan control work again as I do have 2 single speed fans.
uhlhazard and/or bonnieclyde100,
Although this is an old thread, I wanted to resurrect it since I am running the same 700r4 trans and a dual efan setup (Intrepid) with my 8625 PCM for my 4.3L TBI S-10.
If either or both of you are still around, would it be possible for me to get copies of your .bin, .adx, and .xdf so I don't have to reinvent the wheel. I would appreciate it greatly.
Thanks,
uhlhazard and bonnieclyde100,
Happy New Year to you guys!!! Wow, thank you for responding and agreeing to assist me; anything that you provide will be useful! Being a newbie to turning, I can use all the help I can get. Using what you've developed will put me that much more ahead of the process.
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