teal94z281989

hey everyone i am new to this site and have found alot of forums to help so i decided to start my own profile,anyhow i have a big problem my car wont start. i have 43lbs of fuel pressure and i have great spark its blue in color. i had blew a head gasket about 6 months ago and finally got all the parts and got it back together and i got it to start but i had to keep my foot on the gas to keep it running and now it dosent start at all. i thought i had my rockers adjusted wrong but ive readjusted them a dozen of times and that cant be the problem. pls someone help!!!!!!

teal94z281989

could i have a sensor bad not cousing the car to start,aslo i had bought an accel cap and rotor from summit but dont think it could be the problem since i have good spark at the plugs.

EXIT1RENEGADE

just for the hell of it check the opti harness to make sure its plugged in all the way, on both ends. had a similar problme when i just did my opti.

teal94z281989

ok i will try that as soon as i get back to the car tomorrow. i had the car running around 500-600 rpms but i had to hold the throttle about a 1/4 ways and i was adjusting the rockers and i got it to idle to 1000 but it started to rain and i had to put everything away since i dont have a garage and since then i couldnt get the car to start again

RamAir95TA

iTrader: (2)

Sounds like you possibly have a crossed plug wire. Check, recheck, then doublecheck the recheck on the order of the wires.

teal94z281989

I have checked many times but i will check again just in case.Could there be any sensors that would not let it start and if its not the wires any other suggestions of what the problem could be. I just want to drive her again after sitting for six months lol

RamAir95TA

iTrader: (2)

Have you tried scanning the PCM for any stored codes?

teal94z281989

no i havent i dont have the tool to scan it.

RamAir95TA

iTrader: (2)

In order to diagnose the car you have to take the proper steps first of which includes scanning the car for any possible codes that would prevent the car from starting such as DTC 16. Invest in an interface cable and free scanning software plus a laptop.

I just posted this in another thread. The cables can be found at www.tunercat.com

teal94z281989

ok and where can i get the cable and software. i have the laptop

EXIT1RENEGADE

its $85 lol i just bought one

teal94z281989

Thanks ramair95ta now do i need a handheld scanner or can i just plug it all into my laptop.

teal94z281989

hey exit1renegade where did u find it for $85 because tunercats wants $160

EXIT1RENEGADE

http://www.tunercat.com/cables/aldl.html

the one you should need (1994 z28 right?) is USB/ALDL-1.

and it plugs into the laptop.

teal94z281989

yes thats the one i need.I thought i needed the whole tune kit? and will it tell me info when my car is not able to run?

RamAir95TA

iTrader: (2)

It will tell you if there are any codes stored by the PCM.

www.ttspowersystems.com is Datamaster - a free program (register after 20 uses) that will allow you to pull codes, check sensor data, monitor knock retard, etc.

teal94z281989

thanks gentelman i did download that program and i have an update i have my iac valve in my hand and i am not able to push the valve in it is stuck open could that be my problem???

RamAir95TA

iTrader: (2)

You should not be pushing on the IAC pintle as you can damage it. It is a stepper motor that moves in and out to change the flow of idle air to the intake manifold runners.

It should be clean but you can damage it by forcibly trying to move it.

teal94z281989

ok i was told it should move in and out with a light push with my finger could that cause a no start? and can i check it with a multimeter

RamAir95TA

iTrader: (2)

Have you confirmed that you are getting good spark out of the optispark AND the coil while the motor is cranking? How did you end up adjusting the rockers?