LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Urgent...No start: no spark or fuel

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Old Mar 4, 2009 | 12:56 AM
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jtarp's Avatar
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Urgent...No start: no spark or fuel

I have to get my car running quick. It is my only one. I am getting no spark to the plugs or fuel pressure. Could it be the ICM?
Old Mar 4, 2009 | 02:15 AM
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doubtful, you would have fuel I believe.
Have you changed your opti out yet?
Old Mar 4, 2009 | 03:11 AM
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Have you check all the fuses in both fuseboxes?
Old Mar 4, 2009 | 02:39 PM
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Yes I have changed out the opti and checked all the fuses under the hood and on the side of the dash. Are there any other fuses besides those?
Old Mar 4, 2009 | 03:27 PM
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I am getting fuel up through the fuel line though. I popped it off and primed the pump and got fuel to there. But when i used the fuel pressured tester on the schrader valve i go nothing with the pump primed
Old Mar 5, 2009 | 05:47 AM
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You need to step back, take a look and make a list of what you did so far!

I see 3 pages back you already started a lengthy conversation about this problem. In which you stated

"I tested it correctly this time I believe lol. I got no spark. So I thought maybe the wire going from the coil to the opti was bad. I took the wire off and sure enough I got spark coming from the coil. I'm guessing this is still a valid way to test it? The only bad thing is, is that noone in my town sells the wire...figures"

Just a few things I want to state.

Multiple posts are difficult cause for example, I was about to ask a question you already addressed before. Stick with one post, clear it up if you have to. Make a summary of what you have done from time to time.

Second, if it has spark at the coil but not after it, there ain't much else to figure out. Tie that to the opti you claim to have installed and Ta Da.

Third, in your other post, you don't even know how to connect a spark tester in line with a spark plug but yet you feel compelled to change the opti? Some thing is wrong with this picture.

I understand the compulsion to repair it yourself but it seems at this point you might be your own worst enemy. Take it some where.

Last edited by Guest47904; Mar 5, 2009 at 05:57 AM.
Old Mar 5, 2009 | 12:37 PM
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Originally Posted by speedygonzales
I see 3 pages back you already started a lengthy conversation about this problem. In which you stated

"I tested it correctly this time I believe lol. I got no spark. So I thought maybe the wire going from the coil to the opti was bad. I took the wire off and sure enough I got spark coming from the coil. I'm guessing this is still a valid way to test it? The only bad thing is, is that noone in my town sells the wire...figures"

Just a few things I want to state.

Multiple posts are difficult cause for example, I was about to ask a question you already addressed before. Stick with one post, clear it up if you have to. Make a summary of what you have done from time to time.

Second, if it has spark at the coil but not after it, there ain't much else to figure out. Tie that to the opti you claim to have installed and Ta Da.

Third, in your other post, you don't even know how to connect a spark tester in line with a spark plug but yet you feel compelled to change the opti? Some thing is wrong with this picture.

I understand the compulsion to repair it yourself but it seems at this point you might be your own worst enemy. Take it some where.

I installed a brand new delphi opti from thepartsladi and I had the exact same problem as before.

I knew how to connect it, I just wasn't paying attention to what I was doing because I was aggravated with the car.

The only reason I posted another thread is because noone was responding to the other one.
Old Mar 6, 2009 | 07:37 PM
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Do you have a noid light yet?
If not, I just fixed my car and can give you a couple things to check that are simple to do.
Old Mar 6, 2009 | 09:23 PM
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Yes I have purchased one. Any help would be great.
Old Mar 7, 2009 | 11:56 AM
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While cranking have you been able to get the noid light going?

Unplug the connector at the opti and unplug the "black" connector at the PCM. Check for continuity on these pinouts. B2, B3, B14, B20. Use shbox site to see which wire is what.
I am only saying to do this, as this is what was the final diagnosis for my car after replacing all of the ignition and still no spark/start.
Old Mar 7, 2009 | 02:09 PM
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I just realized something today that I didn't notice before. The cap on the new opti has about a 1 inch or so crack along the side between the opti harness connector and where the spark plugs attach to. I don't know if this happened during shipping or during me installing it. Would this be the problem?
Old Mar 7, 2009 | 04:26 PM
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looks like your installing a new opti.

heres a good start
http://www.autozone.com/R,1539278/ve...ductDetail.htm
Old Mar 7, 2009 | 06:15 PM
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So did you try the simple DVM test I offered
Old Mar 7, 2009 | 07:02 PM
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No, I did not perform the test. I noticed that the cap is cracked and am assuming that this is my problem.
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