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Originally Posted by b1gs3xy
Hello, I bought 1995 jimmy 4.3 vortec about 6 months ago. It currently has 125,000 miles. I have been having numerous problems. First problem ended up being the EGR Valve. After taking it off every couple days and cleaning out the carbon peices I got smart and bought a screen gasket which did the trick. During that time it was rough idling, killing when I would come to a stop, loss of breaks, stinking, running hot, about everything you could think of it did. Alot of people on here have the same problems and I would suggest taking off your EGR Valve and if it becomes a problem get a screen gasket. Well since I fixed that now I have more problems. I was starting to get the same symptoms but when I took off the EGR Valve it was fine, the screen blocks all the carbon peices. So I put that back together and tried replacing the plugs. That did nothing. Also during the EGR problem I would get a check engine light and codes. This time I get nothing, computer reads no bad codes. I think it is running really rich since I am getting even worse gas millage than before. I also noticed that sometimes the tailpipe will start spitting black liquid/carbon and leave a spot on the ground. Other times its fine. Does anyone have any ideas for me to try? Basically for the last few weeks now it starts hard and idles bad and the motor shakes until the you give some gas and get the rpms up about 2000. When taking off from a stop it will feel like its missing until again it reaches 2000 rpms. It constantly stinks like gas/carbon/exhaust. When I turn the AC on it gets even worse it idles lower and shakes more. I was thinking about cutting out the cat/convertor and when under the truck I notced a leak of antifreeze. I couldn't see exactly where it is coming from but appears to be under the water pump. When running it does not leak. As soon as I shut it off it will start leaking bad for about 10 mins and then slows down to a drip. So I think I also now need a water pump. If anyone could give me ideas, it would be very helpful. once I fix this thing I think its time to get rid of it. Its looks like brand new but after learning the problems with these things I am afraid of whats going to happen next. Thanks, Rob.
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