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

keithmac · 10-09-2006, 11:37 AM

I had really crap part throttle miss-fire, changed the plugs and leads but that didn`t make a difference. My realtime o2 correction was pegged at 38% when it happened (max lean?). Pulled the ECU and replaced the capacitors, the difference is night and day! totally different car to drive and no missfires at all.

I don`t think you`d be able to tune though an ecu problem such as this with the SAFC because the values make no sense when the ecu goes tits up, plus the caps performance may change while driving if they`re on the way out.

Seriously pull the ecu and change out the caps, I`ve read a service life of between 7 and 10 years for the caps so even the newer cars may start to suffer from this problem?

10-09-2006, 11:37 AM	#22 (permalink)
keithmac Forum Member Join Date: Sep 2006 Location: YORK / UK Trader Rating: (1)	Re: Lean Misfires at 2700-2800 rpm I had really crap part throttle miss-fire, changed the plugs and leads but that didn`t make a difference. My realtime o2 correction was pegged at 38% when it happened (max lean?). Pulled the ECU and replaced the capacitors, the difference is night and day! totally different car to drive and no missfires at all. I don`t think you`d be able to tune though an ecu problem such as this with the SAFC because the values make no sense when the ecu goes tits up, plus the caps performance may change while driving if they`re on the way out. Seriously pull the ecu and change out the caps, I`ve read a service life of between 7 and 10 years for the caps so even the newer cars may start to suffer from this problem?