Chris02mp5
Member
- :
- 2002 protege5
Recently I have been experienccing a missfire at idle with cyl 1. The car runs fine under load and will have a very slight intermitent miss at idle but not enough to stall the car. I have replaced the plugs, wires, coils, and injectors. I have recently done the 1.8L coil conversion and am wondering if it could be caused by the signal wire to the coil. Only question is would cyl 4 also be experiensing a missfier if this were the case? The car is running high compression (~11.5:1) with heavy cams, double valve springs, adj. cam gears ect... I tired pulling the cyl1 wire and it it has to be very close to a ground source before it will arc to ground where as cly2 will arc from 1-2 inches awy. This is consistant when I switch the coils as well. I tried just a regular compression test and it was fine, but I have yet to try a leak down test. Any ideas? I am starting to lean towards the possibity of a burnt intake valve but being so new and having not seen rpms over 4500 I dont know if this could be the problem. any ideas? I may pull the intake tonight check the intake valves, I had the headers off yesterday and the exhaust valves looked fine, other then the extra carbon build up from running rich.