Help! ‘ 89 Corvette convertible engine woes...

[CatDog]

I took the Vette on a 250 mile ride to Long Island from upstate NY. Sixty miles after topping off the tank in NJ the engine started to lose power. I reached my destination and the next morning the car started showing no problems. Thirty five miles later it started to lose power, and I barely got it off the highway. After letting it cool down I crawled to an Advanced Auto, and replaced the electronic components on the top of the distributer. A half hour later I was stopped dead on the ramp of the GW Bridge. After resting a half hour I crawled to a Chevy dealer (Sunday night) in NJ.

The dealer insisted I replace the injectors, and he refused to drive the car to see the complete failure of the engine. I agreed to replacement of the distributer in hopes the problem was the cam position sensor. Upon picking up the car it was dead in the water again 4 miles down the road. I again abandoned it, and returned later to tow it home.
I have since replaced the gas filter and gas pump, though the gas pressure is consistent before and after engine failure, and the symptoms would suggest otherwise. Since I replaced the pump I have noticed that the oil pressure drops severely during the period between startup and complete engine failure; something that previously may have gone unnoticed.
PS: The car also leaks oil, and I had added oil twice on the way to LI. An issue which was going to be addressed had the engine problem not arisen.

 

[ecss]

Look at the color of the body of the fuel injector. If they are Gray, the dealer may be correct.

89's used Multec fuel injectors. The injector coil/windings were exposed to the gasoline. The insulation would eventually break down and the windings would short out.

Remove the connector at each fuel injector and measure the resistance across the injector coil. Should measure around 16-17 ohms. Measure them when cold and hot.

Why do you believe you have a spark problem? You can pull a spark plug lay it on the intake and crank the engine.

The L98 doesn't have a cam position sensor.