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Duralast / Electronic Spark Control Module For your 1993 Chevrolet Truck C2500 3/4ton Sub 2WD 5.7L TBI 8cyl
This appears different than what you sent me. Does this control the pulse for the injectors?
Automatic 4 speed
1. The vehicle is a 1993 chevy suburban with a 350 engine. The problem appears to be it is not getting fuel. I also have a 1988 chevy silverado with the same 350 engine.
2. The engine died on the 1993 and after extended periods of time it would start and run for approx. 5 minutes then die.
3. We cracked the fuel line at the carbuator and had fuel flow when the key was turned on. We assumed this elimated the fuel filter and pump.
4. We checked for spark at the coil and thought we did not have any. We replaced the coil and verified we had spark.
5. We removed the air breather and could see fuel being sprayed into the carbuator from the injectors when the truck would run but did not have any fuel when the truck died.
6. We swapped the injectors between the 1993 and the 1988 engines. The 1988 truck ran normal and the 1993 truck continued with the same problem.
7. We swapped the fuel injector pressure regulator. The 1988 ran fine and the 1993 continued with the same problem.
8. We swapped the fuel pump relay with the same results.
9. We got a noid light from autozone and when the truck ran we had pulse. When the truck died we no longer had pulse.
10. During a previous e-mail with just answer and a different technician a wiring diagram was attached. The diagram showed the ECM controlled the injectors. The explanation was the injectors were controlled by applying a ground at a pulse which lifted a ball valve allowing fuel through the injector.
11. When I searched autozone parts the electronic spark control came up. When I talked to autozone it is supposed to be located in the distributor. When we pulled the distributor cap we did not find anything which looked like the picture.