Ok so I got the car in 2008 it was rough running when I got it but I gave it a tune up plugs wires, cap, distributor (just be on the safe side) oil change etc the whole nine. The car ran a lot better but one day I went to take it to work and it sputters and then dies and I go to start it and then the same thing. I towed it back to my house because it ran fine to the gas station and then it started acting up. I messed with it for a couple days tried everything I could think of (ive owned over 20 of these I've worked on them alot) and nothing it pissed me off so I let the car set for two years. I was looking at the car and decided ill try it again I put a battery in gave it some starting fluid and it started right u up I had my gf drive it down the road and I followed in my truck just in case and it drove just fine for her. I hopped in it on the way back and went to drive it and it dies. I got the car home and it has sat until a month ago when my gf said something needs to be done. she pulled off the tuned port and took the fuel rail off to put in new injectors I changed the fuel filter after taking all the old gas out we got it back together and tried to start it and it just cranks. It won't even start with starting fluid it tries to start more when you give it gas when it's cranking I know it's getting spark its getting the right fuel pressure to the rail everything you need to make it run and it won't. I even did a vats bypass just in case that was the problem and nothing. it seems like its only trying to fire every other revolution. I have pretty much changed everything on this motor and tried everything and I don't know if there is something I'm missing or what. its probably something simple but I don't know. If I can figure out what is going on with this car I can possibly figure out what is up with the other two cars I have also with the same problem. Sorry this is so long but it's better to know the whole story then only pieces someone please help!!!

 

This is probably the longest run-on sentence I have ever read.

I'll give you 50 bucks for it.

 

There is no need for periods we're not in school but I could edit it add periods and what not and make the paragraph even longer

 

Start with some basic tests, fuel pressure, injector pulse with a noid light and spark with a good quality spark tester.

 

Why don't you do that. Then possibly we could comprehend what you are trying to say and maybe even have some useful suggestions for you. Attitude doesn't really work well here.

 

I hope the periods help lol

 

You know what being a smart *** doesn't help either. I didn't have an attitude. I edited it that wasn't a problem

 

I checked all that and still nothing

 

This is gtajohnny! "periods are for girls!!"

Sounds spark related if it wont run on starting fluid. Coil in cap? Check wires that feed power to the distributor. Maybe they are chewed up? Fuses?

I'll give you $100, sounds like a nice drop top.

 

http://easyautodiagnostics.com/gm_ic...n_module_1.php

 

Your right periods are for girls but I guess my paragraph needed them so it could be comprehended. The cap and coil are new the wires look good nothing looks chewed it's getting spark i checked. And 100 bucks i don't think so

 

Your not being explicit enough to Help, You said you checked fuel pressure spark and injector pulse. But Now you state you have hot spark

 

I said it was getting spark

 

Then what are you missing a internal combustion need, compression, spark and fuel/air to fire and correct timing.

 

Your guess is as good as mine. I've never had this problem but in the last 5 year's I have bought 3 cars with this problem. It's probably something simple that I'm overlooking but it has me stumped.

 

Did you test the coil & ignition module?

Instead of replacing random parts in the hope of finding the problem start with basic diagnostics, if you don't know how to test and troubleshoot, or use a multi-meter. then learn, After 25 cars of the same model you don't have the shop manual service guide?

 

I replaced the parts one by one not all at the same time and I have a manual but it's not helpful with this situation. I know how to test and I know how to use a multimeter I love working on cars I can put these cars together with no problem but this has got me stumped. I'll definitely go back a double check everything it can't hurt but for three cars to have the same problem is crazy. The other cars are an 88 notchback with a 5.7 and a 92 trans am convertible with a 5.7 all three are tpi's. I hope noone else ever gets this problem.

 

They all have the same engine, so a similar component has failed on all of them.

test the coil
test the ignition module

if those test OK, then test to make sure you are getting spark to the distributor.
test the high tension lead from the coil to the cap.

Test the spark plug wires to make sure you are getting power to all the plugs.

check the cap & rotor for wear, corrosion & carbon, replace with new if needed.

check the spark plugs; clean and re-gap or install new plugs. Always check the gap & set to OEM specs ,never assume they are correct out of the box.

did you remove the dist. from the engine? then need to check timing

If spark side all checks out then need to diagnose the fuel system.

then

Did you test the:

IAC motor
MAP sensor or MAF sensor
TPS

If all this checks out the engine should start and run.

The only thing left is a bad ECM... which you did not mention having tested or replaced.

 

I love it when the clueless post about tearing apart their cars
throwing parts at it to cure a problem.

Basic tests like is there spark? fuel? compression? would cure any
issue simply...................

 

 

I'm not clueless. Havent you ever had a problem with you vehicle. My girlfriend could probably tell you more about these cars than you even know. I posted this to get help not to be criticized. I wouldn't be taking it apart if I didn't know how to put it back together that's not the problem the problem is that it won't start. So what I changed the parts it's trial and error if one thing doesn't fix the problem you move on to the next you don't know unless you try. Everything that I replaced was SIMPLE parts atleast I know when I do figure out the problem everything else is new and I don't have to worry about. You see it as someone not knowing what they are doing.

 

Unsubscribed , I don't appreciate the attitude when Trying to help !

 

Really he can say I'm clueless but I can't say anything back? What a joke I wasn't giving you attitude I was talking to him.

 

Thanks for the help ill go through everything again and make sure everything is right

 

OP, everything you need to troubleshoot and get the car running is in the service manual, if you bother to read it.


good bye and good luck.

 

Do you have an extra computer?

Maybe is de PCM

 

have you tested the ign control module?? sometimes you get a spark but no start when they go