I installed the new engine last week and I have had nothing but problems. Here are the symtoms.

1) When I go to set the timing this is what happens. I pull the EST wire loose and set base timing. When I reconect the EST wire It does not advance untill I shut the engine off and start it again.

2) When I go to set idle I jump the A&B terminals wait a minute and then disconect the IAC and adjust the idle to 900 by way of the throttle screw. After idle is reached I set the TPS and then hook the IAC back up and turn off the key. I have also tried setting the TPS after the I have hooked up the IAC. Either way I do this after the key is turned off and turned back on the idle goes were ever it wants to anyware from 1250 to 2000rpm. No matter what I do the end result is still the same.

3) When I take the car and put the tranny in to a gear the rpm will drop to almost nothing and die.

4) I have tried to set the TV cable a couple of different ways and I can't seem to get the tranny to shift correctly.

5) The car will not pull past 3k without boging like the ignition is not advancing.

6) The car has no *****.

If you have any ideas please help.

Here is a list of the parts that I have recently replaced and my mods.

distributor and ignition module
cap and rotor
plugs and wires
MAF and relays (blown out by backfire through intake)
ECU


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89 GTA w/700r4w/stage 2 shift kit,2800 converter, corvette servo, B&M mega shifter, TPIS bigmouth intake, TPIS large tube runners, TPIS 52mm throttle body, Ported Edelbrock centerbolt heads,Accell 30# injectors,holly afpr,GMPP LT4 hotcam,CompCams Pro magnum roller rockers,Edelbrock headers, flowmaster crossflow muffler,MSD 6A, accell coil,150 shot NOS. The new engine is in but I am still having some small problems.

[This message has been edited by poncho9789 (edited November 22, 2001).]

 

Hey man,

>1) When I go to set the timing this is what >happens. I pull the EST wire loose and set >base timing. When I reconect the EST
> wire It does not advance >untill I shut the engine off and start it >again.

Thats normal. From a programmers point of view, it probably does not have a loop to check if the wire had ever been reconnected.

All your other symptoms lead me to believe your MAF is either screwed up, or the green wire fell out. Ive actually diagnosed this problem on more than one TPI car. Car won't rev beyond like 3500, just studders, has no
power, idle acts like a vacume leak, etc.

-- Joe

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1989 Formula 350 4-bolt mains, Forged .030 TRW pistons, SLP 51010 Roller Cam, Comp-cams roller lifters, Summit 1.5 roller rockers, World Products Sportsman II
2.02/1.60 heads, Edelbrock TPI Intake, Cloyes Double Roller, timing chain, Mellings oil pump: 13.5 @ 100.23 MPH

Since close of track : Ported SLP runners, Ported Plenum, AFPR, Autometer 100lbs gauge, A/F ratio gauge.

http://www.joesperformance.com

-- Joe

 

I replaced the MAF and the relays the other day I didn't notice that any of the wires were loose. I will check for that wire loose. How many wires should there be coming from the MAF harness. I am also going to change the 30# injectors to 24# for right now so I can see if that was the problem. But if anyone has anyother ideas please post them.

 

I set my base idle to like 600 rpm.
I think your intial idle is so high that it has the ecm confused.
Also explains your other problems

 

I agree with grumpy... setting your idle at 900RPM without te aid of the IAC is way too high... Who told you to do it this way? The best way is to hook your car to a Diagnostic Computer and adjust your throttle plates until the IAC Valve is running at the proper range.

Do you have an adjustable fuel pressure regulator? If so... instead of changing the injectors, set your pressure lower.

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1988 Pontiac Trans Am GTA L98 5.7L, Black on Black with 114,000kms.

Best ET 14.559 @ 95.25MPH
Custom 3" Stainless Exhaust Y-Pipe back (High flow Cat and Flowmaster Mufler)

 

I just got my scaner back about an hour ago. What is the correct range for the IAC? I tried to set the idle to 600rpm earlyer today and the car did the same thing.

Question: Would an intake leak cause the same symtoms as I have described?

Answer:???????