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

DoctorDex · 06-04-2007, 10:16 PM

Quick update:

I advanced my base timing to 10* and I _think_ the lean spot has moved slightly. However, this is only preliminary information as I'm going to need some more time to test this theory on different days as it could possibly be due to the hot weather we've had lately.

Now with the base timing set to 10* it starts missing @ a little over 2500 rpm and it gets really lean @ 2600 rpm and it stops missing by 2900 rpm. Whereas, with a base timing @ 7.5* the missing would start ~ 2600 rpm, it'd become really lean (14% leaner) @ 2700 rpm and the missing would continue up to ~ 3000 rpm.

Maybe this points more to CAS???

06-04-2007, 10:16 PM	#279 (permalink)
DoctorDex Forum Member Join Date: Jul 2005 Location: Edmonton, AB Drives: '91 VR4 - RIP Trader Rating: (16)	Re: Lean Misfires at 2700-2800 rpm Quick update: I advanced my base timing to 10* and I _think_ the lean spot has moved slightly. However, this is only preliminary information as I'm going to need some more time to test this theory on different days as it could possibly be due to the hot weather we've had lately. Now with the base timing set to 10* it starts missing @ a little over 2500 rpm and it gets really lean @ 2600 rpm and it stops missing by 2900 rpm. Whereas, with a base timing @ 7.5* the missing would start ~ 2600 rpm, it'd become really lean (14% leaner) @ 2700 rpm and the missing would continue up to ~ 3000 rpm. Maybe this points more to CAS??? __________________ '91 VR4 - Rebuild in progress: Mods TBA.