Over the last year, I've had an issue with spark knock (pre-ignition), mostly when I pull a long grade or take off from a stoplight. I've done everything short of taking it to a dealership to find out why it is happening. I am using the superchip flashpack and have tried all the different settings with the same results with each. It doesnt get driven for a month at a time while I'm at work so I usually put Stabil in the fuel tank. After coming home this time, I have a new symptom. It stalled twice yesterday and both times it started right up but had "that smell" of dieseling, which I know from past vehicles is a sign of the timing being off. It has never thrown codes for this issue either. I have replaced the following trying to find the cause: plugs and wires, coil pack, knock sensor, MAP sensor, O2 sensors, and even tried firmware update on the flashpack. Does not matter where or what grade of gas I buy, still does it. Is it even remotely possible the ECM is dieing without throwing the codes, OR , perhaps the timing belt has stretched enough to throw it out of time without jumping or breaking? The thing has just under 40k miles on it and has done this since the day I brought it home with 30k on it.
We are Jeep..Resistance is futile..
We are Jeep..Resistance is futile..
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