Question about 1995 GMC Jimmy
1995 gmc jimmy 4.3liter, cyls 2,4,6 the plugs are fouled and runs rough at idle and lopes, also the smell of fumes. I have tuned it up,change the ox senor, did vacuum test, and compression test all cyls. 100lbs and egr ok. please help
Those 4.3L's have a Central Port Fuel Injection system with one injector in the middle of the intake under the plenum, they are good for either the fuel pressure regulator or the plastic lines (that are inside the intake that feed the injector) leaking inside and flooding the intake with fuel. The best way to tell is to take the plenum off and thurn the key to prime the fuel pump and watch for leaks.
Posted on Nov 18, 2008
It's your injecters they are leaking I had the same problem I just replaced them this weekend and my truck is running great
I hope this helped you
Posted on Nov 24, 2008
Also check the map sensor it could be causing it
Posted on Nov 17, 2008
Best diagnostic would be a air care test / checking for air quality out the tail pipe emmisions /hydrocarbons and carbon monoxide and nitrous of oxide..... nox will be a catalitic convertor or combustion chamber full of deposits of carbon//or over advanced ignition ;egr valve . CO a hose or gasket,, co excessive is related to fuel management , defective in fuel injector or a combo of hc and co as computer ecm works in effect with o2 sensor to adjust fuel trim , check the data live in obd a engine coolant temperature switch defective would example -35 c telling ecm it is cold when really is warm sending more fuel thus engine performance poor and rough drivability stalling miss fire ,flat spots and global warming,// pollution
Posted on Nov 16, 2008
May need some more info. how did you do vacuum test? those cyl. being on the same side of engine may indicate an intake leak or more severely a headgasket problem. if you spary carb cleaner around intake gaskets while engine running, is there a change?
Posted on Nov 16, 2008
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:
Jan 13, 2014 | 1993 GMC Suburban
Feb 12, 2011 | 1995 GMC Jimmy
Dec 29, 2010 | 1995 GMC Jimmy
Aug 14, 2010 | 2000 GMC Jimmy
Jul 25, 2009 | 1995 GMC Jimmy
Apr 04, 2009 | 2001 GMC Jimmy
Nov 21, 2008 | 1995 GMC Jimmy
620 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: