I purchased an '89 IROC off Ebay, guaranteed to run great. It is 1000 miles away.
The car runs for perhaps 2 -15 miles and then stalls. Wait awhile and it will restart briefly. When it stalls it is holding 45 lbs. fuel pressure and appears to be sparking. I thought it might be the module in the distributer but the guy working on the car is sure it is quitting with spark and gas.
Is a bad computer or chip or something shutting off the injectors? It has an aftermerket chip.
thanks for any sugestions

 

A new set of spark plugs cures an astounding amount of all fuel-related problems.

The distributor module is the next likely culprit. A car can "have spark", but if they're weak little yellowish-orange things and not big snapping purple-white ones, it won't be able to jump the gap in the compressed atmosphere inside a cylinder. A bad dist module, or a bad coil, can cause the spark to gradually weaken as it heats up. The module is far more likely to be the culprit. Those go bad fairly often.

If you take those 3 things with you, you'll be able to get it to run for sure. Well, 99.999% for sure anyway. I'd change the plugs period; see what it does; if it still screws up, change the module; and then the coil. I'm betting that the car needs plugs anyway (they about always do ) and you'll be able to return the coil for credit.

 

grab an OHM meter to and check impedance on the injectors any read less than 12 ohms...their junk. GM mass air meters have yet to be desired. Try disconnecting it and drive it, i had one that was pure junk and stalled like that