Question about 1999 Chevrolet Silverado 1500
I just changed the fuel pump and filter but the problem still exists.It is like a ignition problem it will stuter and almost like a backfire through the intake.I'm gonna change the plugs but they are new too.
It sounds like you have some fouled out spark plugs. Sometimes when putting in new plugs you may inadvertently get a bit of grease on the electrode while installing them. It has happened to me. If that isn't it then check the rotor and cap. Theses should be changed along with the spark plugs. Spark plug wires are pretty expensive but if you have the cash then change them also. I typically change it all at the same time that way I KNOW everything is new.
Now here is something else to look for. Chevy is notorious for failing intake manifold gaskets. You can get oil into your coolant or coolant into your oil (Which is worse) or both can happen. If you have an unexplained loss of either oil or coolant (No visible leaks) then you may have a bad gasket. In many cases coolant can get into the valves, make them stick open and also foul out your spark plugs. Also look for what appears to be white grease residue in your oil. The best place would be on the bottom of the oil fill cap or dip stick. Look in the radiator for oil floating on the top of the coolant. In my case I didn't see any of these usual signs but still had a defective gasket. It all depends where exactly the gasket failure occurred.
I have had the exact same problem you are having and had to clean a white crusty substance off one or two of the same spark plugs every week or two to keep my truck running well. I had coolant leaking into my exhaust valve and fouling out my plugs. Look for this when you take them out. If you need to replace the intake manifold gaskets make sure you get the NEW and improved ones. This takes 8-10 hours if you know what you are doing. Good Luck!
Posted on Feb 07, 2009
Check your EGR valve or your EGR sensor. That will cause those kind of problems
Posted on Feb 07, 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:
May 01, 2016 | 2002 Dodge Ram Pickup 1500
Feb 26, 2016 | Cars & Trucks
Mar 21, 2013 | 2003 Subaru Impreza
Dec 28, 2012 | 1986 Chevrolet El Camino
Dec 08, 2012 | 1992 GMC Sierra
Oct 12, 2012 | 1987 Toyota Cressida
Jul 08, 2012 | 2003 Ford F150 Regular Cab
Jun 11, 2010 | 1999 Chevrolet Monte Carlo
Jan 02, 2009 | 1995 Chevrolet C1500
1,137 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: