here is a previous post for reference:
https://www.thirdgen.org/techbb2/sho...5&goto=newpost

now its all put together. it has spark but wont run.
the fuel pump has 43psi
the motor will run if you spray carb cleaner in the throttlebody but wont run without it. the noid light is bright when car turns over, but dim on carb cleaner, and goes out when running gas from fuel pump.
any ideas?
this car is driving me nuts, and any help will be appriciated

oh, yeah, its a 95 LT1 in a 92 'maro

 

do you have the right wires on the injetors?

 

as far as i know. i had a guy i met on this forum do the work. he came highly recomended and has had sucess with his third gens.

any ideas?

 

https://www.thirdgen.org/techbb2/sho...ight=optispark

according to what i can understand from the post above, its the opti. is this right?

 

How about an ignition fuse? I had one blow out on the highway in my 96 WS6. I would just crank and nothing. Popped in a fuse and ran like it always did

Just a thought.

 

ill look, but i think if that was it it wouldnt run on carb cleaner

also, a mechanic that was "helping" me had run the opti thru a parts washer that used zep, and the opti smells like ammonia. does that help anyone help me with ideas?

 

I'd think he killed your opti, they dont take a liking to much of anything going inside them. Im hoping he didnt, but if i had to put my money on something....

 

i agree, i got one on ebay for 275 = s/h. i also payed paypal to let me get a refund if its junk. the guy had good reviews, and he said it was brand new, it looked new, but ya never know.
itll be here in a few days, so ill post then, but if anyone has any other things i should test, please tell me i am willing and ready!

oh, and ur right, edelcrap headers DO suck!

 

Yeah I have had the misfortune of recently having to work on 2 cars with them, eternally po'd at edelbrock.

 

not to get too far off topic cause i really need help. my thirdgen is now my only car and it doesnt run.

i ordered em for this LT1 swap in the beginning, and they were junk. i couldnt beleive how crappy they were. so i got slp coated headers. nuff said!

 

Ok , without rereading the entire old post what are doing to bypass the VATS??

 

i bought a bypass module from painless and installed it

 

The problem you are having is EXACTLY what mine did when the VATS wasn't working. The only way I could keep it running was starting fluid. Make sure any and everything involving the VATs is working right, and make sure the module is installed right. I dont know what that involves, so can't help you there. VATS is the only explanation for what you are going through.


Also, as far as the opti. If its running with carb cleaner, the opti isnt the problem because its getting spark.


*sorry, didnt read your other post first. If you were getting spark, then this would be your problem. Since you're not, check the coil first. If not that, then check the opti.

 

Go ahead and get your PCM programmed because you will really need to anyway for the things that arent going to be hooked up. While they are at it have them disable VATS. Then you will be SURE its not the problem you are having.

 

i am getting spark, so i am worried now. i ordered an opti, because another post came to these symptoms being the opti, but thats alot of money for nothing if that isnt it.

SHOOT!!! this stuff drives me nuts!

 

where can i get the PCM reprogrammed? what will this cost?

 

Sinner, YGM.

 

whats YGM?

 

or contact Bryan at pcmforless.com. He did my PCM and I was pretty impressed with it. I opted to buy the cables and load the program myself, but if you have the time, you can send your PCM to him, he'll load it, and send it back. Prices are really good too, might want to check into it.

If you are getting spark then it definitely sounds like a VATS problem to me.

 

YGM= You got mail. I sent an email to your yahoo account.

 

oh, er, umm....ok.. gosh i feel stupid

 

It still makes sense to replace your opti. Especially now that it has been washed in ZEP cleaning fluid.

If your engine runs when you are spraying it then you should check to see if your injectors are firing. I am also inclined to believe that you are having VATS related issues as well.

 

the injectors fire bright with a noid light when turning over, but go real dim with key in on position

 

Sounds like you may need to get an OHM meter and start measuring amperage and voltage readings. Two years ago I had an issue with a bad fuel pump relay. Though the realy was functioning, it was not allowing enough amperage to power the fuel pump. I could not have solved this problem without the OHM meter.

Also, you need to make sure all your grounds and connectors are good. I have seen a lot of strange things happen traceable to bad grounds.

 

Sinner, how about C100 connector (underhood fusebox) injectors fuses, maybe you have a short or damage cable in there.

this is not related to the ECM because you would not be able to run with carb cleaner.

How about clogged fuel rails ? maybe your lt1 comes from a theif recovery or some shiat like that and there has been sugar in the fuel lines and it could have jammed the injectors ???

 

did you bypass the starter enable relay ?

if so, have you tried to run it in it's normal configuration ?

 

Maybe this would help

 

the motor was outta a wreck, so i know it wasnt stolen. the starter bypass should be fine, but ill look over all the fuses too.

 

Thought you would like this. I filled my tank and went to the body shop after writing your response. Turned the car off. Guy said he will call me with the numbers. Go to star the car and it imeadiately dies. Sounds like it's run out of gas. Thought it was vapor lock so I let it sit. Sure enough no start after an hour. Pulled out the IAT and sprayed carb cleaner and it runs until the spray runs out.

Fuel pump realy clicking, but fuel pump not priming. Fuel pump shot. Walbro on its way. Now I have to ruin/redo months of work and a new exhaust to get this dame thing in. The pump is probably cool right now and I bet it will start right up.

 

well i dont like it cause i feel bad 4 u, but my pump works so i know at least thats not a problem

 

Thanks. I hope you get your issue resolved soon.