Lean issue, need advice

rfcsoulja · September 15th, 2011, 11:49 PM

Alright. I am chasing down a lean issue, even after getting it tuned. When coming to a stop, my car will go completely lean and start stutering. Sometimes after around 5 seconds, the afr will shoot back up to normal and the car will idle fine. I have checked for vacuum leaks and have actually replaced all the gaskets from the lower intake up. Also, when I'm at part throttle (usually no more than 30%), the afr will shoot to 17 and 18, and often completely lean. What could cause this?

2001 3.8L Mustang
D1-procherger w/ 2 cor intercooler
3.60" pulley
39# injectors
HPX blow through 75mm MAF
SVT focus fuel pump /w wiring upgrade
plx wideband
Windstar upper intake
P&P lower
comp cam- 218/226 , .500/.500 lift, 108lsa
118 beehive springs and retainers
Mac long tube headers
o/r H pipe into dual flowmasters
Eibach pro-kit
Tokico shock/struts
Detroit true-trac w/ 3.73 gears
pro 5.0 short throw shifter
Also had my egr deleted, pats turned off (or bypassed), rear O2 sensors turned off, and my imrc's deleted.

Majrdad · September 18th, 2011, 09:33 PM

I might offer MAF sensor cleaner as that helped me after installing a new CAI. Cost me $6 and 15 minutes and helped me.... Good luck!....... Ken :-)

September 15th, 2011, 11:49 PM	#1
rfcsoulja Hardcore Enthusiast 01 True Blue v6 to slow to matter Join Date: Mar 2009 Location: Oklahoma Posts: 1,141 iTrader: 0 reviews	Lean issue, need advice Alright. I am chasing down a lean issue, even after getting it tuned. When coming to a stop, my car will go completely lean and start stutering. Sometimes after around 5 seconds, the afr will shoot back up to normal and the car will idle fine. I have checked for vacuum leaks and have actually replaced all the gaskets from the lower intake up. Also, when I'm at part throttle (usually no more than 30%), the afr will shoot to 17 and 18, and often completely lean. What could cause this? 2001 3.8L Mustang D1-procherger w/ 2 cor intercooler 3.60" pulley 39# injectors HPX blow through 75mm MAF SVT focus fuel pump /w wiring upgrade plx wideband Windstar upper intake P&P lower comp cam- 218/226 , .500/.500 lift, 108lsa 118 beehive springs and retainers Mac long tube headers o/r H pipe into dual flowmasters Eibach pro-kit Tokico shock/struts Detroit true-trac w/ 3.73 gears pro 5.0 short throw shifter Also had my egr deleted, pats turned off (or bypassed), rear O2 sensors turned off, and my imrc's deleted. __________________ My supercharged v6 http://www.youtube.com/watch?v=1lNkgKBw0bw

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September 18th, 2011, 09:33 PM	#2
Majrdad Regular 2009 Warrior In Pink Join Date: Aug 2011 Location: Washington, DC Posts: 99 iTrader: 0 reviews	I might offer MAF sensor cleaner as that helped me after installing a new CAI. Cost me $6 and 15 minutes and helped me.... Good luck!....... Ken :-)

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