New to me Spirit R/T, electrical prob diagnose. diagrams anyone?

[zeeboid]

Quote:

Originally Posted by charger R/T it sounds like the computer is pulling the boost. I know you bought it not running. How old is the gas in the car does it still have some gas in it from before you bought it? Tim

It has an all new tank and w255 fuel pump with a couple tanks of new gas.

I replaced the accessory belt tonight, started it up, and shut it off.. patched a new hose into the PVC line-to-grommit, and used some gorilla tape to seal off the weakness in the grommit-to-intake tube side. after doing this, the fuel pump will no longer prime. I wouldn't think what I did related to fuel pump but eh, I looked at it for a good 40mn after replacing the belt, and gave up for the night. wtf could have caused the fuel pump to stop priming? I had it running for a while, even had goooood pressure (as noted on post 39 of this thread).

The spot of the PVC I was playing with is here, behind the line comming off of the fuel rail (which was a tester gauge, that is not hooked up currently). you can hear the Fuel Pump relay clicking, but no pump priming. perhaps I should jack the car up and check the voltage at the fuel pump.

[zeeboid]

I think I got the fuel thing figured out. It was running pig rich because the Fuel Pressure Regulator was bad. I installed a replacement, and it seams to be running better, though boost still isn't nicked:

Boost is still odd on it. it wants to run up to around 15ish when you are accelerating quick, and when you accelerate at a more reasonable rate, it will boost up to about 11ish then drop off to around 6ish.

starting to feel better about this machine, as the bugs drop away.

[zeeboid]

Hey again.

I've replaced the PCV Valve. the spring in it was bad, causing a vacume leak. It is boosting better now, holding 10-11. I THINK. I thought I saw it creap up to 15 for a sec, but I wasn't driving it long. Seams alot alot better... but....

It doesn't seam to be firing or fueling on all cyclinders when it warms up. you can feel the putter missing deal when you put your hand in front of the muffler as its running, and can feel the loss in power. The next thing I had to try, because I found that it was sitting for 7ish yesrs before it got to me, is to use some injector cleaner on it, or replace injectors. I know injectors don't usually go bad, but man, you should'a seen the amount of Rust in the gas tank. but again, it seams to run good when cold.

Anyone else have any other ideas?

[zeeboid]

I Drove around today for a little bit... Its throwing a 27 code which is:

Fuel Injectors 3, 4 - 85-87 Injectors not firing correctly
Fuel Circut - VNT Problem in fuel circut in Logic Module

The harness ends that plug into the injectors are all mising the clips that hold them on, though while idling, I can't figure out which one is not 100%... as it idles pretty fine. Step one is to get clips for the harness ends. if that doesn't fix it, I am assuming step two is to replace injectors (as the car was sitting for a decade)... but if I replace injectors, I'm giong +20s with a cal1 ecu, and don't realy wanna spend 500 smacks right now.

[DaPepster!]

Quote:

Originally Posted by zeeboid Fuel Injectors 3, 4 - 85-87 Injectors not firing correctly

What injectors do you have on the rail? It sounds like you've got two different flow injectors on the rail (two being T3 and two being 85-87)? That'd be why yer throwing code 27: two different flow rates on these injectors.

If they're all T3 injectors, you probably got rust in a couple of the injectors (if you ran it at all with the old gas and tank, that is), or the computer is dying.

Quote:

Fuel Circut - VNT Problem in fuel circut in Logic Module

VNT codes are not applicable to R/T computers.

[zeeboid]

Quote:

Originally Posted by DaPepster! What injectors do you have on the rail? It sounds like you've got two different flow injectors on the rail (two being T3 and two being 85-87)? That'd be why yer throwing code 27: two different flow rates on these injectors. If they're all T3 injectors, you probably got rust in a couple of the injectors (if you ran it at all with the old gas and tank, that is), or the computer is dying. VNT codes are not applicable to R/T computers.

The injectors all look the same and have the number 4412813 on the side. I did not run the car at all with the rusty gas tank, as the pump was shot to the point of not-pumping. I have a reasonable amount of lucas fuel injector cleaner in it now, see if that will help.

I replaced the clips holding the injectors on to the harness. that helped ALOT. its running pretty smooth now but still seams to not have a smooth exhaust (hand infront of the exhaust test), though the engine seams to run smooth and everything. After running the fuel injector cleaner through it, I'll see if that helps. I think next thing is to get a compression tester.

So, it seams to be running pretty good. not 100%, but pretty good.

It still over-boosts most of the time though. if I press the gas down in 5th gear, and boost builds slowly, it stops at about 9-10 PSI. If its in any other gear and builds more quickly, she hits 15. The wastegate doesn't SEAM to stick at all, I can put 10PSI of air on it and it moves... seams to move fine... Should I WD40 it? I'm once again running low on ideas of things to try with this. I could try to run all new vacum lines relating to the turbo, but you know how fun that would be.


If I order new injectors, while I'm spending money, I would rather get the +20s and the Stage 1 ECU, but it would be nice to get this thing running NORMAL before diong crap to it.

[zeeboid]

playing with the car a little bit today, and as far as overboosting, it would seam that it only happens at partial throttles. if I press the pedal to the metal, she will hold about 9PSI.

[zeeboid]

well well.. I picked up a compression tester and I got some not-fun numbers:

(psi)
1: 110
2: 65
3: 125
4: 150

Next step: Taking off the valve covers to check to see if there is a warn lobe or cracked spring....