1985 SE Fuel and Spark, no start (Page 1/4)
hmmhunter JAN 20, 01:21 AM
Hello,

I’ve got a 1985 V6 Fiero, that sat since 2004. Since getting it, it ran but I still went ahead and replaced fuel injectors, pump, pressure regulator, distributor, spark plugs, and ignition coil.

I just finished all this and have been having problem after problem getting it started. Now I’ve reached a point where I know there’s spark, and fuel pressure, but I don’t think I’m getting power to the injectors.
I checked for codes and was getting a code 42 (electric spark timing) and have done basic diagnosing with no success. I had trouble understanding a lot of the instructions for testing electrical power to the injectors, but I believe I have found that there is no power to the 6 wire plug next to the intake manifold.

Anyone run into similar circumstances? Or an idea on what to check first?

Thanks!
Forrest JAN 20, 07:57 AM
Have you verified that when you replaced the distributor...that the timing is correct? It has to be put in the exact same position as the original. Unless you mean you just replaced the cap/rotor.
hmmhunter JAN 20, 11:54 AM
Yes sorry, I just replaced the cap and rotor.
Rexgirl JAN 20, 02:39 PM
There should be 12vdc on the pin and pink/white wires on the engine. Have you checked the TWO 5 amp fuel injection fuses in the fuse panel?


Rexgirl JAN 20, 02:40 PM

[This message has been edited by Rexgirl (edited 01-20-2022).]

hmmhunter JAN 20, 08:39 PM
I’ve checked those fuses, I don’t seem to be getting any power to them at the fuse block though and was T sure what to diagnose before the fuse block
Rexgirl JAN 20, 10:59 PM
Your FI fuses have no voltage on both sides of the fuse?? Do your hazard lights work? If yes, then your Ignition Switch may have failed or need adjusting to make a better connection. There should be power on the switch's pink wire with the key turned to the run position.
hmmhunter JAN 21, 06:02 PM
Ok, the hazards did turn on—how does that mean that the ignition would be bad? And to test this do I need to start pulling apart the steering column to get at it or is there an easier way?
Rexgirl JAN 22, 12:31 AM
The Fiero ignition switch is not covered by the steering cowling. It is mounted down where your knees are, and is the upper switch (with violet writing) shown here:



There should be 12vdc on the pink wire with the key in the 'on' position:



If there is no power on that wire, then the ignition switch has failed or may have slipped out of position.
hmmhunter JAN 23, 11:21 PM
Thanks for the help, I got to it and then stopped when I saw how difficult it was to actually test.

Before I try removing it and risk messing one more thing up, I looked into a couple other options and realized that it does start with starting fluid, and the six-pin connector to injectors is getting positive power, just no ground when cranking. (I still don't seem to register power at the fuses, so that last part is confusing to me)

How do I go about diagnosing this issue? Everything with the ECM seems to function correctly which makes me think it doesn't register the engine turning over?

Thanks!