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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
Satisfied Customers: 16033
Experience:  Have owned a repair shop for 25 yrs.
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1994 Chevy: stalls..fuel filter, fuel pump relay..ignition switch

Resolved Question:

1994 Chevy K2500 truck. Starts & stalls. I have replaced the Fuel pump, fuel filter, fuel pump relay, coolant temp sensor, ignition switch, and tps. Problem still exist. I can keep it running if I feather the throttle. Also when I unplug the coolant temp sensor, it will stay running longer and I can even rev the engine. Its seems the fuel is cutting out. What should I try next?
Submitted: 5 years ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 5 years ago.


it would have been good to have scanned the computer to have goten the trouble codes before all this work was done..there are still a few tings that can cause this,,,it would seem you may be loosing injector pulse,,,

1-the ignition module

2-the pick-up coil in the distributer,,either could cause a loss of injector pulse and still have a spark on the plugs....also

the problem here may be the map sensor,sense it seems to run longer with the ect disconnected...


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1994 Chevy Truck K 2500 Truck 4WD V8-350 5.7L
Manifold Pressure/Vacuum Sensor Locations, Components: Engine Control Module - ECM
84_gmtrkbar90-015.pngMAP Sensor Location

The Manifold Absolute Pressure (MAP) Sensor is located on a bracket, mounted to the intake manifold, on the passenger side rear.

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Customer: replied 5 years ago.
There were no codes set. Is there a way to check the ignition module before I purchase a new one?
Customer: replied 5 years ago.
Can I the ignition module and coil checked at advance autoparts?
Expert:  Tim's Auto Repair replied 5 years ago.


advance can check the module for a spark,,but,most of the time when you loose pulse,,it will show good anyways......when they do this ,,testing dont help