So... 86 SE Getrag 5spd.. 2.8 now a PR 3.1 with a distributor..

I bought a longblock 3.1 from a member (tomsengines) last fall.. This is basically the same as the 2.8.. Distributor, top end, Fiero timing cover, etc etc etc...

I've done a P/R 3.4 swap before with great success and countless stock engine replacements over the years..

I took detailed pics of the process(just seemed like it was going to be a cool thing to share)and had no issues at all with the install.. In fact, it was very relaxing til I got it all back together and touched the key...

Highlights:

- Starts immediately.. Runs for 3-5 seconds.. Konks out.. Every time.. Can keep it running(barely and not safely I assume)by feathering the throttle.. Will not move in gear under this condition..

Lots of newer parts.. Fuel injectors, IAC, TPS, O2, ECM temp sensor. EGR solenoid and tube(with gaskets) Distributor, plugs, wires, coil, cap, rotor button, all vac lines are in place and snug.

Some of these parts all came from the tired 2.8 that was pulled and running well.. Others were replaced at time of install.

I've swapped out the IAC, MAP, MAF, TPS, Coil, injectors, ECM, EGR, From a good running GT I have here.. NADA.. Nothin'

I'm leaning heavily toward the fuel pump..? It pressure tested ok, and held on the bleed down test, but I'm worried maybe it cannot deliver volume and that's why it won't run... It stars very swiftly with the CSI every time..

I kept it limping long enough to toss a code 44 lean exhaust code once.. But I also had the IAC out/unplugged so the code might be erroneous...

Thoughts? I feel like I have a good hold on troubleshooting Fieros, but, lately I've been plagued with lousy running 6's with gremlins .. I'm sick of it...

Any help would be great..

Thanks.

Mark..

[This message has been edited by Indyellowgt (edited 06-19-2017).]

Did you check that both injector fuses are good?

Hiya Ol' Joe.. I did.. All fuses are good.. ECM plug up by rhe battery is plugged in too...

Do you still have a cold start injector? Can you keep it running longer with starting fluid?

Look at the fuel pressure when it starts up. Ideally you would want 40 psi, but as low as 38 should keep it idling. I would suspect either a clogged fuel filter or a weak pump. The lean code could be due to the lack of fuel just before it dies.

Also, are you positive the vacuum line from the MAP and intake are firmly attached to the pressure regulator?

[This message has been edited by fierofool (edited 06-19-2017).]

quote Originally posted by Gall757: Do you still have a cold start injector? Can you keep it running longer with starting fluid?

Hi. Yes.. I believe that's why it starts so quick. Two revolutions of the flywheel, and boom, she's off...

Check the ground wires for the ECM. (A12 & D6)

[This message has been edited by Gall757 (edited 06-20-2017).]

quote Originally posted by Gall757: Check the ground wires for the ECM. (A12 & D6)

Will do! Thanks!