Recent Posts

21

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by bd on September 04, 2025, 12:11:01 am »

With the fuel pump relay connected to its wiring harness, will the fuel pump run as long as you feed B+ to the RED/WHT pigtail?  Using an incandescent test light clipped to a good, clean ground (not your voltmeter), probe the DK GRN/WHT wire connected to the relay and start the engine.  While the engine is cranking and running, does the DK GRN/WHT wire illuminate the test light?

22

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by Yellowcat on September 03, 2025, 11:07:28 pm »

The green and white wire going to the fuel pump relay is coming only from the ECM? If it is and the ECM is faulty?

23

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by Yellowcat on September 03, 2025, 11:04:15 pm »

https://youtube.com/shorts/3pHSupQrGhI?si=zqMyS2clF9DZK1x-

24

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by Yellowcat on September 03, 2025, 11:03:15 pm »

https://youtube.com/shorts/3pHSupQrGhI?si=GTz1wP2Y-YJmjgrm

25

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by Yellowcat on September 03, 2025, 11:00:15 pm »

The truck cranks today and runs after cranking for 10 seconds or more. Still the fuel pump relay us nit getting all the signals. I post a link to videos to watch it. Still the pump is not priming like it did for 2 seconds

26

Rear Drivelines, Drive Axles and Gearing / Re: TH350 Dead

« Last post by Shifty on September 03, 2025, 11:34:23 am »

Sounds like you have a plan, keep us updated!

27

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by bd on September 03, 2025, 02:00:04 am »

See below.

28

Rear Drivelines, Drive Axles and Gearing / Re: TH350 Dead

« Last post by 1980K20 on September 03, 2025, 12:00:30 am »

The torque converter was blown.  The rear drum was worn, should have been replaced in the first build.  Seals in transfer case leaking.  Oil pan appears to be leaking. Will replace rear main seal on engine just in case.  There’s a coolant leak, likely from intake manifold (which i have to do myself).

They’re fixing everything except intake.  Cha-ching.  At least it will work.

Maybe get it home next week?  Then for the break in.

29

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by Yellowcat on September 02, 2025, 09:03:04 pm »

The multimeter buzzes and goes to 0 when the probes are touched.. the EGR and EAC tested both at 37ohms. The truck will not start and run because I can't get power to fuel relay like it's suppose to have or power to the pump when I tried to  jump it from the pigtail on the fuel relay. Why is there no power to the green and white wire on e fuel pump relay when you turn ignition on??

30

Electrical / Re: ECM 1 fuse blowing 1987 chevy

« Last post by bd on September 02, 2025, 06:45:33 pm »

What does the meter indicate if you touch the two ohmmeter probes together?