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Showing results for tags 'fast idle'.
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My 1988 YJ with TBI has given me hell over the past few years. She's never failed on me but causes me headaches everyday trying to make it run perfectly. My issues include high idle (1100 rpm) for the past few years, recently have noticed a good amount of blow-by and oil leaks. It gets 120psi on all cylinders during a compression test. I will list all work I have done to it to try and fix these problems. Please let me know if im missing anything. I have followed the diagnostic tree on the FSM to the tee and nothing has really fixed it. - Metal valve cover from newer jeep YJ - New Head gasket, Head valves reseated, new rockers and push rods -New valve cover, PCV and CCV cleaned, -New exhaust/intake manifold gasket -New Injector -New ISA -Full rebuild on intake manifold (all gaskets replaced, and all sensors are within what the FSM states they should be, Cleaned inside and out) -New EGR valve -Timing checked (was off by 2 degrees but made no difference when corrected) -TPS and ISA readjusted -New cat -New Exhaust manifold -New Cap, Plugs, and wires Oil is now coming out of where the distributor meets the block - I just replaced the gasket and am still experiencing the leak. Please note I am a novice mechanic, I know I have fired the parts cannon a few times but it was all for good reasons. Please let me know what you think my issue may be or If I am missing a part of the diagnostic process.\ BTW - I love this thing, the diagnostic process is half the fun... -
New here and tried searching but came up with nothing similar. My 06 LJ 4.0 (155000 miles) recently developed a habit of going to a fast idle/high rev of around 1500 RPM's or so. If I blip the throttle it settles down until you take of again and it repeats. I installed a Genright 31.5 gallon fuel tank and replaced the fuel pump assembly at the same time because it was a whole lot easier and I didn't want to drop the new tank anytime soon. I had a code for EVAP system small leak which I attributed to the vent hose from the tank to the filler neck as the hose that came with the tank was rather short and had no clamps. I installed it and put some zip ties on it until I could get a new section of line and clamp, which I did a week or so later. I also had a code for O2 sensor which I forgot to write down but it was present long before these symptoms began. I have searched for vacuum leaks but it's possible I might have missed one. Anyone have thoughts on this?