Pontiac Problems? Ask a Mechanic for Answers ASAP
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What year make and model?
What size engine
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Sorry for the delay.
Need to check the fuel pressure 55-62 psi. This should not drop more than 5 psi after 5 min with key turned off.
If it drops it could be a leaky injector?
Also I have had throttle body that needed to be cleaned.
Please let me know if this helps or if you have more info.
Throttle Body Cleaning
Caution: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.
Notice: Do not insert any tools into the throttle body bore in order to avoid damage to the throttle valve plate.
Notice: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.
As for the fuel pressure you need a fuel pressure gauge.
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