My friends having a dilema having just one vehicle to go to work with and wouldn't be able to afford to keep spending if it is deemed unrepaired. The GMC Jimmy,1995 4.3 vortex,purchased 2 yrs ago was running perfect until recently. It has been running really rough especially when on idle like its missing. Pressure gauge dial goes up & down. She has changed all plugs, wires,distributor cap & rotor. Added a BG 44k injector cleaner, filled it up w/high octane shell gas. All this didn't seem to have solve the problem. She took it to a local mechanic and he didn't seem to know what could be causing it. Seemed like to me it needs cleaning somewhere because the exhaust smells dirty. I told her I get some really good help on this column and we'll hope we do with this problem. Thanks so much for helping.
What is wrong with the GMC Jimmy?
- Thread starter tagara
- Start date
Molson02536
New member
Common for that year of 4.3 Vortec's to have a struck EGR valve. Remove the EGR valve and clean the carbon from it and make sure that it's not seized or binded up any where.
You can use Carburetor cleaner or a product called Deep Creep made by http://www.seafoamsales.com/. Would not be a bad thing to also give the Jimmy a Seafoam treatment to clean out any carbon that has accumulated throughout the years. One last thing is to also inspect and replace any vacuum lines that are damaged or collapsed, good luck and keep us posted.
http://gmcowners.com/gmc-forum/showthread.php?t=13770