In May 2018, I went to the track and ran a 10.5@137 but then broke my OPGs. I rebuilt the motor with forged internals, put in a Mantic clutch, and an Eaton Truetrac. I also changed slicks to a stiffer tire.
Last night I finally made it back to the track. I started with higher tire pressure and didn’t run too well. I ran a 11.0@131 with a 1.78 60’, only revving it to around 7,300. Was running Ignite Red E85.
So I started lowering tire pressure and bringing the revs up to 7,800. I got out of the hole pretty well (1.5 60’ times) but after that the car was all over the track. I gave it about 4 tries before saying screw it.
On that last attempt, I made it about 500 feet when the engine light started blinking. I shut it down and pulled the codes. P300, P301, and P306. So cylinder 1 and 6 were misfiring. The car drive completely normal when bringing it to a stop. I got back to my parking spot, nothing odd happening while getting there, minus the engine light blinking. I cleared the codes and did a crank relearn, and the codes haven’t been back since. Drove it 45 miles home going 60mph and then to work this morning in stop and go traffic at 45mph. No codes, nothing seemingly wrong happening while driving.
So this makes me think it was spark blowout. I’m fairly certain I gapped the plugs last summer to 0.028. I’m going to pull them all tonight and check them. I’m hoping it’s just that and not a coil with low voltage or some other issue I haven’t thought of. I also need to figure out why the car is all over the track. A shop owner here in the Chicagoland area pointed toward the rear axle being out of center or not aligned with the front, so I’ll start there.
Gotta love driving that far only to get 4-5 shit runs in that all but one requires shutting down due to either damn near crashing or misfires...I was wondering if the Ignite Red might’ve been the culprit for the misfiring, as I’ve never had the issue before and that was the only thing different. But that’s just a giant assumption as I have no idea or experience with it...
Last night I finally made it back to the track. I started with higher tire pressure and didn’t run too well. I ran a 11.0@131 with a 1.78 60’, only revving it to around 7,300. Was running Ignite Red E85.
So I started lowering tire pressure and bringing the revs up to 7,800. I got out of the hole pretty well (1.5 60’ times) but after that the car was all over the track. I gave it about 4 tries before saying screw it.
On that last attempt, I made it about 500 feet when the engine light started blinking. I shut it down and pulled the codes. P300, P301, and P306. So cylinder 1 and 6 were misfiring. The car drive completely normal when bringing it to a stop. I got back to my parking spot, nothing odd happening while getting there, minus the engine light blinking. I cleared the codes and did a crank relearn, and the codes haven’t been back since. Drove it 45 miles home going 60mph and then to work this morning in stop and go traffic at 45mph. No codes, nothing seemingly wrong happening while driving.
So this makes me think it was spark blowout. I’m fairly certain I gapped the plugs last summer to 0.028. I’m going to pull them all tonight and check them. I’m hoping it’s just that and not a coil with low voltage or some other issue I haven’t thought of. I also need to figure out why the car is all over the track. A shop owner here in the Chicagoland area pointed toward the rear axle being out of center or not aligned with the front, so I’ll start there.
Gotta love driving that far only to get 4-5 shit runs in that all but one requires shutting down due to either damn near crashing or misfires...I was wondering if the Ignite Red might’ve been the culprit for the misfiring, as I’ve never had the issue before and that was the only thing different. But that’s just a giant assumption as I have no idea or experience with it...