new to 3rd gen camaro, not to chevy. I have a 86 TPI, was 305 now roller cam 350. motor is new, 89 vett cam, R/R arms, 925:1 pistons, gear drive, 24lb injectors, hypertech chip, for 350 TPI (used dont know year/model of chip) Car will start (vary poor/no idel) runs ok @ 2000/higher RPM, runs poorly til then, but if you let die, will not start untill it cools off (has good spark, weak/no injector pulse until cooled) any and all help needed. if more info is needed let me know. thanks, joe

 

First Off, find out more about that chip. It could be for a 91 SD system when you have MAF or vise versa. Could be for a vette or something else. Second, a gear drive is a nono on cars with knock sensors.. It will trigger the Knock sensor to retard timing. 24lbs injectors will run too rich with the hypertech chip because its set for 22lbs injectors. When it runs is there an SES light? It appears theres a great deal of mis matched parts. I take it the motor is now an L98 with an L98 cam. (TPI 350's had same cam as the F -Bodys) Are you running a MAF setup or Speed density?

 

runing MAF, i got the car like this, glad I didnt pay 4 that gear drive!
also it has about 80 psi fuel when priming fuel 40 psi turning over.

 

is there number on the chip you an cross referane it to a part number on a site?

 

Whats your timing set at? Valves adjusted right?

 

I can get the # off chip, time is at TDC for now.

 

ses light? whats your fel pressure set at?

 

valves at "0" lash 1/2 turn then locked down

 

check engen light stays on

 

engine lights? TPS Setting? Still running EGR?

 

engine light stay on, will check TPS, yes on EGR

 

pull the codes and tell us what they are.

 

Might try another memcal and chip.
If you're using the ECM and harness from an 86, what are you doing with the cold start injector? You may want to unhook that if you're running a chip for an 89.

 

How are you getting 80 lbs? You should not see that unless you pinch off the return line.

 

get the codes and post them.

I will get prom #s and try to find out what it is out of and post that also. thanks joe

 

when checking fuel psi, turned the key and gauge went to 80 psi, let off key went to about 50 55 psi turned key again and got 80 psi again (it has adjustable fuel reg.)

 

Adjust it down to 45psi, get the stored error codes as mentioned above, and report back.

 

HYPERTECH p/# 128922 / 1989 chevy camaro 5.7L V8 vin8
no codes, can not make my computer go into diagnostic mode
as for the fuel PSI, the screw is to long and hits the bottom of the top intake. pulling the intake off and replaceing screw with shorter one, to get that flue PSI down.

any ideas about the computer???

 

I'm just curious, are you using the 86 harness and cold start injector?

 

yes, but i put the stock 305 chip in, didnt change anything, other than the motor is "broken in" now.

 

Yours won't flash any codes if you short the #5 & 6
or the #6 & 12 terminals?

 

didnt know about this, I used A&B term.
can you tell me where to find #5&6 or #6&12 ?????

 

https://www.thirdgen.org/newdesign/faq/thirdgen.shtml

go down near the bottom of the page under "miscellaneous"

 

thank you.
i have jumped # 5&6 (no codes SES light just stayed on) I will look to see if I have #12,and try 6&12.
I will still need a chip for the 350 TPI???

 

Well, I think I would run a bin file for the 89 like the ARAP, and disconnect the cold start injector, and disable the VATS.

 

sorry....bin file?? what & how???
CSI -know where that is
VATS-know what that is,,(disable???)
thanks again, got a lot of new info,, joe

 

I have the file from my 89. Just shoot me an email.

 

check your P/M's

 

still cant get any codes, when I short 5&6 term. the SES light flashes real fast,( like its flickering) So how do I get the codes now? there are some sensor problems, so I need the codes.

 

ttt

 

You're pretty much past the limit of anyone's ability to help remotely...time to troubleshoot.

You may have missed a ground in the bundle at the rear of the cyl head(s), may have a fried ECM, or something else.

 

all 3 grounds are hooked up,(2 bundles 1 singel) on back of head. got a new ECM today. will post back (with codes/ more problems)

 

had to change the new,'' junk computer'' with new one the codes are.... 12,32...
12=no distributor pulse
32=EGR system, just priced EGR valve, too $ for me at this time. Is there any way to ''X'' this thing out?

 

Get into the DIY-PROM burning forum and have a look.