cars chugging yet - Car Troubleshooting


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joshuamagiary
New User

May 15, 2013, 1:13 PM

Post #1 of 3 (1399 views)

cars chugging yet	Sign In

I've changed the fuel injectors and the coils spark plugs and wires on my 2003 Pontiac Grand Am 6 cylinder 3400. And my car is still try again and seems like its starving for gas I brought it and put it on a diagnostic test and it says that the number 5 cylinder is still misfiring. I'm really starting to get irritated with this card anyone have any good ideas that will help me .

HT
User

May 15, 2013, 3:27 PM

Post #2 of 3 (1373 views)

Re: cars chugging yet	Sign In

Quote

I'm really starting to get irritated with this card anyone have any good ideas that will help me .

Yes, stop throwing parts at it and let a competent shop diagnose it properly. It would have been a lot cheaper if you did that in the first place.

nickwarner
Veteran / Moderator
nickwarner profile image

May 16, 2013, 4:53 PM

Post #3 of 3 (1332 views)

Re: cars chugging yet	Sign In

Have you checked your fuel pressure regulator for a leaky diaphragm? If it is leaking the vacuum line that goes to it will dump that fuel right near the #5 intake runner. With HT here, don't throw parts at this. You've spent way more on parts than it would've cost to get a pro to diagnose this. With the car running, pull the vac line off the pressure regulator and cap it with your finger so you don't get a vacuum leak. Watch to see if you get fuel coming out of the nipple the line hooks onto. If you do, replace the regulator.

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