Expert: autohelp - 4/15/2009

Question
QUESTION: It was making this horrible knocking noise from the fuel injectors and so I went and got some restore fuel injector and system cleaner and poured some in the 2 injectors and the rest in the tank . I waited 10 to 15 mins. and started it the noise started to quiet down. As it was running ,but was stubbling and getting better. For about 5 mins so I thought it would be wise to drive it to clear the system drove at 15 to 20 ft the knocking disappeared an was running good then another 8 to maybe 15 ft. it killed out on me and wouldn't start again . What is it ?

ANSWER: When you say it won't start again, Do you mean that when you turn the key to start the engine you hear NOTHING or do you hear the engine turning over but it just will not start and run ?.

---------- FOLLOW-UP ----------

QUESTION: It turns but want start.

Answer
You most likely have a fault in either the fuel pump and or the fuel pump pressure regulator.

Try this test:

1. Get yourself a helper.

2. Have your helper remove the gas cap and listen at the gas cap opening.

3. You, Turn the ignition switch to the ON position WITHOUT trying to start the engine.

4. As soon as you turn the key ON, Your helper should hear the electric fuel pump in the gas tank run for 2 seconds and then stop.

5. Does it ?