1989 Odd Misfire
Thread Starter
Intermediate
Joined: Nov 2022
Posts: 34
Likes: 7
From: Buffalo, NY
1989 Odd Misfire
I recently upgraded my intake (BigMouth base, AS&M runners, ported plenum), and added 1.6 roller rockers while I was in there. Deleted EGR and AIR pump plumbing.
Set fuel pressure to 48psi, and base timing to 8 degrees.
I now have a noticeable misfire in the 1600-2000 rpm range. Plugs and wires are AC Delco and new last year. I guess maybe a wire could not be seated properly, I plan on double checking that.
It also seems to idle a bit higher cold than it used to (takes longer to settle at the 600rpm range). TPS is still showing .56v.
Anyone have any other ideas?
Set fuel pressure to 48psi, and base timing to 8 degrees.
I now have a noticeable misfire in the 1600-2000 rpm range. Plugs and wires are AC Delco and new last year. I guess maybe a wire could not be seated properly, I plan on double checking that.
It also seems to idle a bit higher cold than it used to (takes longer to settle at the 600rpm range). TPS is still showing .56v.
Anyone have any other ideas?
Thread Starter
Intermediate
Joined: Nov 2022
Posts: 34
Likes: 7
From: Buffalo, NY
