ecm

  1. H

    1998 k1500 5.7 ECM 1 fuse blowing

    Was at a red light, as i began to accelerate my engine shut off, the lights and radio still worked inside but the motor was off. popped the hood and it was the ECM 1 fuse that blew. got it towed to the house and started working on it, disconnected o2 sensors and it still blew, i don’t think it’s...
  2. barry_g

    ecm gurus: loopback connector c5?

    its me again, the guy who has never had an answered question. my truck still starts without this plugged in. I am curious to the function. I have new ecm on the way..a convincing diagnosis as of now. for reasons not releted to this connector. at 397k and 30 years... it has seen colder -20 F...
  3. J

    Finding PROM for ECM

    Hey all, Looking for a PROM chip for my ECM. Anyone know where i could get a stock one? Any precautions I need to take, or is it just plug and go? 1991 Chevy K1500 350TBI 4l60/700r4 ECM part#:1227747 Thank you
  4. M

    93 TBI EGR Delete

    Im at a 10 with this EGR and want it deleted but want it done the right way. So I need the EPROM tuned so I wont get any ping or that pesky CEL. Im looking for someone somewhere reputable that I can just send my ECM to and have it returned for a stock 1993 C2500 350 TBI just with the EGR. Im no...
  5. CoopDog

    electrical problems

    1988 GMC G3500 VANDURA CUTAWAY BOX TRUCK The truck ran great when the motor was replaced the LED lights worked that I had replaced. Now it ran today but no lights. actually lights haven't worked in a while. checked all the fuses, all good. however, when it is running and i turn on the lights...
  6. F

    98k1500 weird electrical problem check it out

    This one is a tough one I've been a mechanic for 30 years and never have had a problem figuring out problems this one has me stumped. I have a 1998 K 1500 5.7 4l60e 4x4 last year I converted and rebuilt the engine to carburetor .the 4L60E worked off of the tachometer on other signal along with...
  7. H

    ECM Identification

    I have a 1994 Chevrolet Silverado Extended Cab with a Chevy 350 and 4l60E. I'm currently trying to find what PCM bin file is needed for tuning purposes when I upgrade certain drivetrain components.
  8. KCusick81

    Fuel pump? - Results of electrical testing at fuse box - What does this indicate?

    Good evening all, I'm in need of some help diagnosing the latest issue with my 1997 K1500 5.7. How it started: About a week ago, I was driving my daughter home from school. I stopped at a stop sign and my truck shut off. No spitting or sputtering. No warning, just shut off. The truck would...
  9. C

    Troubleshooting Fuel Relay Issue on 1990 Chevy Cheyenne

    Hi everyone, I am a young adult that is self taught and taking after his father and grand father. Bear with me if you can. I’m looking for some guidance on a frustrating issue I’ve been trying to solve with my 1990 Chevy Cheyenne W/T 1500 (6-cylinder, 4.3L). The fuel relay doesn’t activate...
  10. T

    1988 k2500 goes into "limp mode" when accelerating going uphill

    I have a 1988 k2500 tbi that has been giving me some grief lately. The truck starts and idles very well and drives like normal for a few miles then starts acting up. For example the other day I drove the truck to work which is about seven miles from my house. The started fine in the morning and...
  11. BrownDogg

    O2 sensor placement

    this is a message to all the smart dudes out there, especially when it comes to exhaust. i have a 95 c1500 TBI, I installed a 96-00 crate engine so I have vortec heads. I got true dual exhaust installed but the vendor didn't install a bung plug for the sensor. Now considering I got true duals...
    • BrownDogg
    • Thread
    • ecm exhaust o2 sensor
    • Replies: 16
    • Forum: Exhaust
  12. T

    ECM trouble dtc 51 PROM error

    I recently purchased a 1988 Cheyenne K2500 4X4 and a couple of days ago the truck stalled while idling at a red light and the power seems low when accelerating. I got home and noticed the SES light came on so I checked for any codes and I got code 51 which says there an error with PROM. I...
  13. 1996greanbean

    Ext Cab to Crew Conversion Question

    Well it seems odd I’ve been going to this website for the last 5 years for advice and never once registered so I’m brand new here. I’m sure one of you knows the answer to my probable obvious question but I have to ask because I haven’t seen any other discussions about it. Little background. I...
  14. B

    Help: WINALDL Readings & No Fuel Prime & Knocking 350 TBI

    Hey there, I have a 1991 c1500 5.7l 250k miles. Bone stock. I just ran WINALDL to help diagnose my knocking engine. Truck only starts after a long crank once the Oil Pressure Switch kicks on the fuel pump, therefore bypassing the ECM- right? Truck does NOT prime fuel with key on, engine...
  15. H

    5.0 manual trans swap bin file

    Since the trans in my stock 1995 c1500 with a 5.0 (305) died on me this morning, I have decided it is time to finally put in a manual. for this, I've decided to just go with a nv3500, (the truck is completely stock and makes very little power so I'm not too worried about strength). I can't find...
  16. Dinkster

    At my wits end, please help.

    1995 Chevy K2500 5.7l manual trans. 200k miles. Engine surges at idle, fluctuating from 500 to 1200. Also after is been running, shut down and restarted, I can feel it buck and jerk at light throttle for the first minute or so. The things I've checked / replaced are extensive, including: TPS...
  17. I

    1995 K1500 Engine Harness Removal

    Hello everyone. I have a few questions about removing the engine harness on a 1995 K1500. I know you have to disconnect part of the harness at the bulkhead on the driver's side and that the other side of the harness passes through the firewall on the passenger side which goes to the ECM, but is...
  18. B

    No Fuel, No Spark

    So I decided to save a 95 Sierra standard cab short box 4x4 5.7L auto truck from the crusher at our local salvage yard. When I got it, it was in pretty rough shape but the body was good and I was told that it ran when it was brought in. I guess this is all a story for another post so I'll get to...

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