cam sensor light on newish stroker
Posted: November 4th, 2008, 3:18 pm
Hey everyone,
I put a stroker in my jeep a few months back and ive got about 500 mile on it, but ive had this problem since i put it in, and im hoping to fix it. First here is what ive got: the jeep is a 99 cherokee with just under 200k on it. The engine i believe is from a 95 wrangler. its a 4.6, with a comp cam, larger valves and a few other mods, including 24lb ford injectors. I did not build it but it was done by a reputable shop. My problem is that I keep getting a cam position sensor check engine light. I believe the code was odb11 po178. I have tried unplugging my battery, and resetting everything, but it comes back on within a few miles. I have also put a second sensor in it to see if that was the problem, and nothing changed. I have read that you sometimes have to adjust the timing according to the cam setup, and i was wondering if that might be my problem. Here are my cam specs if i helps at all.
part# 68-232
grind: a6 x4 250h-13
intake exhaust
valve adjustment: .0000 .0000
gross valve lift .462 .478
duration@ .006 tappet lift 250 256
valve timing open@ .050 open closed
INT. 13 btdc 56abdc
EXH. 62bbdc 13atdc
specs for cam installed: @110.0 intake centerline
intake exhaust
duration@ .050 206 212
lobe lift .2890 .2990
lobe separation 113.0
The engine seems to run well, doesnt knock as far as i can tell, and my plugs look decent, but im getting poor milage. like 12-15 highway.
Any idea what could be causing my issue?
is there any chance my relocation of the coil could have caused this?
Thanks for all the help
~lightfoot
I put a stroker in my jeep a few months back and ive got about 500 mile on it, but ive had this problem since i put it in, and im hoping to fix it. First here is what ive got: the jeep is a 99 cherokee with just under 200k on it. The engine i believe is from a 95 wrangler. its a 4.6, with a comp cam, larger valves and a few other mods, including 24lb ford injectors. I did not build it but it was done by a reputable shop. My problem is that I keep getting a cam position sensor check engine light. I believe the code was odb11 po178. I have tried unplugging my battery, and resetting everything, but it comes back on within a few miles. I have also put a second sensor in it to see if that was the problem, and nothing changed. I have read that you sometimes have to adjust the timing according to the cam setup, and i was wondering if that might be my problem. Here are my cam specs if i helps at all.
part# 68-232
grind: a6 x4 250h-13
intake exhaust
valve adjustment: .0000 .0000
gross valve lift .462 .478
duration@ .006 tappet lift 250 256
valve timing open@ .050 open closed
INT. 13 btdc 56abdc
EXH. 62bbdc 13atdc
specs for cam installed: @110.0 intake centerline
intake exhaust
duration@ .050 206 212
lobe lift .2890 .2990
lobe separation 113.0
The engine seems to run well, doesnt knock as far as i can tell, and my plugs look decent, but im getting poor milage. like 12-15 highway.
Any idea what could be causing my issue?
is there any chance my relocation of the coil could have caused this?
Thanks for all the help
~lightfoot