Hi Folks, have been searching for a solution for this problem, and although it seems to affect a lot of Liberty's, Calibers, Nitros, etc., nobody seems to have a solution that I can find, or the ones that do fix it don't provide enough info on what the repair was.
Several times over the last month, the ETC (electronic throttle/lightning bolt) light will start flashing and ESP (traction control/skidding car) light will come on, and the truck will run at around 1500 rpm regardless of throttle or braking. First time it happened I limped home and it was fine when I restarted it... now I just kick it into neutral and restart the engine to make it go away... but I'd like to actually solve the problem!
Here's some background: Have had K&N CAI installed for years Last spring, 2 or 3 times, truck ran really rough after starting and narrowed it down to throttle body by the noises it was making. Cleaning TB didn't help. In August I decided to replace TB, and put in a reman 4.7L throttle body (Seemed like a good time to try out the mod since it was cheaper than the 3.7L part anyway) A month ago the problem started while driving home after having the truck oil-sprayed. Occasionally I will get a check engine light... usually goes away before I have a chance to scan it, but when I have been able to it's a P0306 cyl. 6 misfire. Could be coincidence, but it seems to always go into limp mode a few minutes after I've given it decent throttle to get onto expressway or the like.
So here's my theories: I know sometimes connectors or relays will corrode and cause similar problems, so wondering if oil from the spraying maybe got in to a bare wire somewhere and is shorting something out? Would be great if someone knew what or where the likely locations of these connectors are. Could be the 4.7L TB is incompatible with the truck, but I know a bunch of people here have done it and don't recall hearing any issues like this. Could be the reman 4.7L TB is defective.
Planning to give my old throttle body a really good cleaning and reinstall it tonight to see if the problem happens again with it installed, but would appreciate any suggestions!
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