Question about 1979 Pontiac Firebird
I have a 1979 pontiac trans am. 4 barrell carb. It was driving fine. Took it to the shop. They cleaned out the carb and put in a new EGR valve and charcoal filter. Now it runs down the road fine, but after a few hundred miles it grew less and less willing to idle steadily without dying. Even when I put it in gear, unless I give it a good amount of gas, it will die. I plugged the tube with a pencil, but it still acts the same. Is it as simple as adjusting the idle?
If they used a spray to clean the carb, then all the junk that was in the carb burned off on your plugs. You probably got a lot of black smoke out of the exhaust when you first drove the car away. Check the plugs. They are most likely gummed up with the residue from the carb cleaner. Either clean the plugs or invest in a new set. This should ensure that the car fires on all 8 cylinders. Driving on the highway, you'd be less likely to notice the problem since you need less power to move through the higher gears. If this doesn't solve your problem post back and we'll diagnose it further. Best of luck!
Posted on May 23, 2009
Got a quadrajunk carb on there? If so, unscrew the needle valves in the front of the baseplate and spray carb cleaner into the ports. Put them back in and turn out about two turns each. adjust back and forth to get the highest vacuum reading, then use a tach to get the best steady idle.Do this with the advance disconnected and plugged, adjust final idle speed with linkage adjustment.
Posted on May 23, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 27, 2013 | Cars & Trucks
Nov 18, 2009 | 1996 Pontiac Grand Am
Aug 08, 2009 | 1989 Pontiac Firebird
Jun 10, 2009 | 1993 Pontiac Sunbird
Apr 10, 2009 | 1985 Ford F150
Nov 03, 2008 | 1998 GMC Suburban
Oct 16, 2008 | 1995 Pontiac Firebird
Jun 07, 2008 | 1987 Pontiac Firebird
626 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: