3000GT/Stealth International Message Center - View Single Post - Lean Misfires at 2700-2800 rpm

DoctorDex · 01-22-2007, 07:31 AM

Bob,

I apologize that I don't have any logs handy and my car is in storage at the moment so I won't be able to make any new ones, for a few months time, but I'll tell you what I remember from memory.

During the misfires:

TPS stayed constant
O2 trim (the instantaneous one) would bounce between ~160 and ~60
IDC/IPW I can't remember if it changed, but I'm pretty sure it remained relatively constant.
O2 sensor voltage would bouce back and forth between rich and lean.
Timing would bounce around +/- 5 degrees.

When it would start missing, if I kept it at the same rpm point eventually it would start to knock.

I'll make a log of it as soon as I get my car out of storage. Thanks for your help.

Declan

01-22-2007, 07:31 AM	#125 (permalink)
DoctorDex Forum Member Join Date: Jul 2005 Location: Edmonton, AB Drives: '91 VR4 - RIP Trader Rating: (15)	Re: Lean Misfires at 2700-2800 rpm Bob, I apologize that I don't have any logs handy and my car is in storage at the moment so I won't be able to make any new ones, for a few months time, but I'll tell you what I remember from memory. During the misfires: TPS stayed constant O2 trim (the instantaneous one) would bounce between ~160 and ~60 IDC/IPW I can't remember if it changed, but I'm pretty sure it remained relatively constant. O2 sensor voltage would bouce back and forth between rich and lean. Timing would bounce around +/- 5 degrees. When it would start missing, if I kept it at the same rpm point eventually it would start to knock. I'll make a log of it as soon as I get my car out of storage. Thanks for your help. Declan __________________ '91 VR4 - Rebuild in progress: Mods TBA.