Asher

Has anyone had a timing issue with a 2.4L vvt? I have a 2008 Caliber R/T FWD CVT, the car has 198,000 miles on it and recently threw a front cam sensor code, I replaced both front and rear cam sensors. Couple days later it went back to long cold cranking times and threw a crank sensor code (figured it would since I just swapped out the cam sensors). I swap in a new crank sensor and cleared the DTC's..


The car is still having issues with long cranking during cold starts, and throws the (Crank out of sync)) code when it acts like this. Let it warm up and clear the code and it drives fine about 70% of the time but occasionally stumbles. So I swapped the original crank sensor back in to see if anything changed (I ran the scan tool with on both sensors to eliminate them).


I recently put the scanner on it and did a couple active driving test and found out the "base spark" timing is out of spec and way high. The factory spec (per scan tool) is 0-63.5 degrees this thing is running about 72 degrees and spiking up to 87-90 degrees. The "cam timing" is in spec but the "base spark" is off.



I am wondering if it's possible that this engine (198k) jumped a tooth on the timing chain at the crank? I don't want to get to far into this motor because it still has the mopar lifetime warranty on it, but I don't want to take it there for something simple I have over looked.


I did a dry compression test on cyl1 and cly4 and they both where a hair under 150psi, I don't know if 1 tooth off would change the compression enough or not..


Anyone have any advice or run into similar issues?



Thanks in advance.