My car has been idling like shit and i have really low vacuum, and checked everything else and it seems that it can only be my ecu or my timing being off. I hooked my OBD11 tester in and evrything was good except for ignition advance. My fuel trims were fine, good % at WOT, but my ignition advance was going between -12 and -5 while idling. I want to know why is it jumping around and i though we the advance is not supposed to be in the negatives. I may be wrong, just trying to diagnose a problem. I think my timing is off, but dont know what the timing should be at at idle. Any help, thanks
99 RS-T "New bottom end(8.6:1 w/long rods)" Turbonetics 60-1/Portfueler/etc!!!!!
#74329, "RE: Timing problems!" In response to Reply # 1
No, i havent touched any of that. I just had my timing belt replaced when the shop fixed my bent valves. The belt still looks brand new, but i think the timing was off a mark or something. I have no clue, it may have been off when installed. I wish i knew, but i am only gonna check the ecu and timing. After that, i am so lost as to what could cause this low vac and rough idle.
99 RS-T "New bottom end(8.6:1 w/long rods)" Turbonetics 60-1/Portfueler/etc!!!!!
#74331, "RE: Timing problems!" In response to Reply # 2
low vac and idle are text book products of the timing off on the cams...did the car ever run right after the belt was replaced? I would pull the cover and double check.
Terry
96 Eagle talon ESI Star Stage II - Boost/oil/EGT gauges
#74333, "RE: Timing problems!" In response to Reply # 3 Jul-24-04 07:02 PM by freddy_00_69
How do i know if the cams are off timing? I should check the timing on the gears, right. I just want to understand your reply so i know what to check. My camshaft position sensor wouldnt have anything to do with that since it is on the side of the head on the exhaust cam. Just wondering. I appreciate the help, thanks. I will check tomorrow for those things.
99 RS-T "New bottom end(8.6:1 w/long rods)" Turbonetics 60-1/Portfueler/etc!!!!!
#74334, "RE: Timing problems!" In response to Reply # 4
well you need to pull off the timing cover and align the marks on the crank/oil pump. then check the marks on the cam gears. its a pain to do but the best way. I highly doubt your ECU or cam sensor is the culprit. If the intake cam is off by a tooth or two you will develope the low vac and lopey idle. It would be like having a very large overlap on the intake-exhaust cam lobes.
Terry
96 Eagle talon ESI Star Stage II - Boost/oil/EGT gauges
#74339, "RE: Timing problems!" In response to Reply # 6
Thanks, i will have it fixed monday. I was leaning towards that but i feel much better knowing i got second opinions from you guys who know more about our cars. Points for both of you.
99 RS-T "New bottom end(8.6:1 w/long rods)" Turbonetics 60-1/Portfueler/etc!!!!!
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