Question about Cars & Trucks
Posted by Anonymous on
This could be the O2 sensor or the MAF sensor. Try disconnecting the MAF sensor and if the idling seems normal, the MAF sensor is bad. Yet, it is always better to get the codes read if the CEL in blinking.
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Posted on Jan 02, 2017
Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.
Posted on Jan 17, 2009
Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.
Posted on Feb 07, 2009
if it runs high when you first start it then mellows out,, theirs no problem , all of our chevys do that.... but if its sputtering or you hear a quiet popping noise check spark plugs
Posted on May 20, 2009
SOURCE: rough idle after warm up
I'd take a look at the temp sender...the engines computer may be
"thinking" the engine is still cold when it's not. That would cause it
run rich (and rough) after it's warmed up. Generally the sender can be
tested with an ordinary volt/ohmeter but you will need the
specifications available in most inexpensive manuals. As with any
complicated electronics system, I can only give you my best guess,
without the luxury of doing any hands-on testing myself.
Posted on May 28, 2009
Tips for a great answer:
Feb 03, 2016 | 2004 Cadillac Deville
Nov 05, 2015 | Ford Cars & Trucks
Jun 20, 2014 | 1990 Toyota 4Runner
Car overheats and Air blows hot at idle? http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
------While stop engine idles like cylinder missing? http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
---------This will help.Thanks.
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Dec 16, 2011 | Dodge Ram 1500 Cars & Trucks
Jun 29, 2009 | 2000 BMW 3 Series
Jun 15, 2009 | 1994 Saab 900
May 28, 2009 | 1991 Cadillac DeVille
Jun 28, 2008 | 1991 Plymouth Colt
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