i was driving only 134 miles on my fresh new 93 lt1 i just did a hotcam and a .20 over boreput all the newer opti stuff on it was leaving give it a little gas it stumbled and then died i tried roll starting it it started once and nothing happen when i gave it the gas any ideals or can a fuel pump go out like instantly the car has been running a little lean also what could this be please help

 

any suggestions

 

Just check the basics. Fuel pressure, spark at a few plugs. If you have spark, try squirting fuel into the intake while someone cranks it over.

 

Does the car crank over?
Does it try to fire?
Can you hear the pump kick on?
Does the dash light up?
Have you scanned it for any codes?

 

the fuel pump comes on the car cranks just dont sound like it is hitting dont the car is a 93 i went to the newer opti from the 95 and up got it from autozone it is new had to go to that for the cam wonder if the opti could of went bad that quick

 

The 95 opti is vented. Did you route this vacuum vent to the intake?

 

What he said.
Check you F/P and spark, my guess is one of the two is not there. When you check the spark I sugest you spend $5 at auto zone and get a spark checking tool. The reason is if you have a weak coil or a bad Opti (Cap/Rotor) it will still get spark sometimes but will not jump across the tool whaen set to the correct gap.

 

Just cause you hear the fuel pump does not mean it has any pressure at all! In many cases, a quiet fuel pump gets noisey when it's on its way out. That's why I suggested you squirt fuel into the intake as someone else is cranking it over. I doubt your pump took a dump right after you did all this work though.

If you want to start with that, fine. If it still doesn't light, then you probably know it has no spark. Start looking for spark at a plug and then move to the coil. The suggestion of using a spark tester is a good one since plugs can fire with a weak spark out of the cylinder but under compression they may not. A wider gap used in the tester will simulate the requirement of firing under compression.

I like the spark testers that go inline as this will test the plug as well. If it shows no spark at that point, ground the tester and try it again. If it still has no spark, move back to the coil. See if it has spark. If it does and the plugs don't, you know the problem is in the opti. This is where I'm putting my money on in your case.

I think it was either mounted incorrectly(unlikely) or you put the vacuum on the new opti incorrectly and sucked the cap down onto the rotor. All you have to do at that point is remove the cap to see what happend. Do yourself a favor if you have to go into the opti again. Put number one at TDC. This makes it easier to check things later if you have to remove or replace the opti.

 

thanks for the help i found the problem the ingnition module went out it is fixed now the module was under warranty