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Amedee, Buick Mechanic
Category: Buick
Satisfied Customers: 24134
Experience:  ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
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94 buick: v6..fuel pressure..spark plugs replaced cam sensor engine

Customer Question

93-94 buick 3800 v6 fuel pressure is good spark at spark plugs replaced cam sensor engine turns over fine just doesnt try to start
Submitted: 7 years ago.
Category: Buick
Expert:  Amedee replied 7 years ago.



We will have to pinpoint what the engine is missing.





All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the car to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should! Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

Customer: replied 7 years ago.

noid light not blinking when turning over

Expert:  Amedee replied 7 years ago.

Ok... Then this would mean that it should run on starting fluid. Does it in fact fire up with starting fluid?


Do we have power at the injectors with the key on?

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