bigtymn

did you check all the relays primarily the ignition one also does your odometer working properly ive had issues with both i found out the hard way this stuff is very easy to check !

86MonteSS

iTrader: (3)

too much exhaust backpressure?

Schwanke Engines

iTrader: (1)

I didn't read through the complete post, but have you replaced or tried the IAC motor? Remove it with the key off. Have a buddy turn on the key while you hold your finger over the plunger, if you don't it will come completely out. Turn off the key. The plunger will want to come out and find the end of its travel, again, keep your finger over it.

Another suggestion, get a MAP sensor. It might be lying to you. I guess keep us posted.

sevanseriesta

iTrader: (34)

will do guys I have a new PCM that came in the mail today. I will bring it tomorrow. And will know more tomorrow. We will see if it is just the PCM

Domesticated Euro

iTrader: (1)

Just a little suggestion, not sure if it would help, check to make sure it has vacuum during cranking. According to your posts, It's the only thing I haven't read that you tried yet, and it's one of the simplest things that everybody seems to overlook.
Good luck!

ssheets

iTrader: (1)

I had something like this happen to me and it was a bad relay. I believe it was the ignition relay. You can swap some of the relays around as mos of them are the same model.

I know you've stated you checked this, but are you sure about the relays??

2000 bigred

iTrader: (1)

I had a problem with software. try loading a stock tune. try to c if start and then reinstall software. it fix my problem. don't know y . O i was using hp tuner.

YellowToy/A

iTrader: (1)

Lets try this.
1. If it has fuel and spark it will fire.
2. Have you taken out the spark plug and touched to the block and crank? If it fires you have spark.
3. Motors love starting fliud. If you have spark and starting fluid it is not the PCM.

Have you verified cam timing. You need to pull the frount cover and look at the timing marks on the cam and crank. They need to be right. It is not as much fun as play with computer but must be done.

Schwanke Engines

iTrader: (1)

So, who gets the 100?

TAQuickness

iTrader: (28)

More importantly, is it running yet?

BlkHwk

iTrader: (8)

We have to split it 30 ways

1_bad_TA

iTrader: (6)

has it jumped timing?

LSXNV

iTrader: (1)

the last time i had an issue like this it was in my '87 TPI Formula. just had water in the fuel. i am sure this was brought up already i am just to lazy to read the whole thread. anyway, just my .02.

turnandburn

iTrader: (1)

only one person hit on the u codes a class two data malfunction will cause it not to start if the modules are not talking to on another, have the tech ping all the modules to see if they communicate,if one does not then thier maybe your problem. if they all communicate then check the pcm harness and pins at the computer i have seen the wires break at the connector and cause simmilar issues. you can keep replacing thepcm all day but if the wirings not 100% then it will make no difference.

lsheaven

coolant temp sensor in driver head?? had a similar headache

sevanseriesta

iTrader: (34)

car does not run yet. I have been working a lot and have not been able to mess with it. I will be working on it all day tomorrow and Wensday. The car should start by the end of Wensday. I will let everyone know what the problem is.

bigtymn

i have a pcm for a 99 formula with ls1 edit in it and it all works properly get in touch

edcmat-l1

iTrader: (10)

Its alomst the end of Wednesday. Any updates??? Hopin for the best for ya.....

8a8mfh

iTrader: (3)

I have two class two Uxxxx codes and my car runs fine.

It's been said and it's been ignored--is there water in the fuel tank?

Spark, timing, injector pulses, compression, it used to run, GREAT but starting fluid into the intake, water through the injectors, it'll NEVER fire.

bowe1632

iTrader: (1)

this was a good read..any updates?