93 firebird quits running, dies, going down the road

**tom123** · 07-29-2013, 07:42 AM

I have a 93 firebird, with the LT1 auto trans, it runs great at first then 5 or 10 miles along it dies, just shuts off. have checked fuel pressure, 43 lbs. changed icm, coil, when it dies it has no fire going to plugs when you turn it over, fuel pressure is 42 or 43. let it set 10 min it will crank up and go again. It may go a mile or 10 but it will do it again. Just bought car figure thats why he sold it, it has 90,000 miles and is un molested bone stock, for now,

**transamtom** · 07-29-2013, 07:51 AM

Check your EGR valve on the back of the intake manifold,if its not functioning properly it will cause similar problems.

**tom123** · 07-29-2013, 08:27 AM

checked egr seems ok stumbles when pressed in thanks, im at the point ill try anything

***SMWS6TA*** · 07-29-2013, 10:07 AM

is that 90k on the opti-spark too?

**tom123** · 07-29-2013, 11:03 AM

Originally Posted by SMWS6TA

is that 90k on the opti-spark too?

opti spark and water pump look new no moisture on or around opti-spark, cranks perfect, runs strong no misses or sputters. when it quits i have no fire to plugwires i hook my timing light to number 1 plug wire n turn it over. i have changed coil n ignition modgule. fuel pump has been changed someonee made a trap door. whhen it quits it can be any speed it just shuts off no warning no power loss no miss