Knocking/ Detonating problem NEED HELP

DSGmach395 · June 17th, 2011, 01:52 PM

Hi everyone. Im having a problem with my Mach knocking under load. At first i thought it was my fuel pump giving out but my injectors have a constant 40 lbs behind them so i dont think it is a fuel issue. The car has a C&L CAI and 85mm mass air flow. Im begining to think the maf is going bad. A guy at a tuning shop told me C&L tends to run 10%ish lean. What gets me is about a month ago it was fine and i havent changed anything.

Does anyone have any ideas? Tonight I'll post some of the scanner data.

Thanks for any help

Andrew

SS EATR · June 18th, 2011, 12:58 PM

clean the maf meter first amd see but with it being new i wouldnt think thats the problem, try pulling some timing out of the high rpms see if that helps any too

DSGmach395 · June 21st, 2011, 12:30 AM

I did try cleaning it a little while ago and it didn't seem to help. I'm hoping a tune will help, I ended up ordering the sct sf3/x3 from American Muscle. The guy from Bama said they should be able to fix it. I am anxiously waiting for it to come in the mail!

June 17th, 2011, 01:52 PM	#1
DSGmach395 Newbie 2003 Mustang Mach 1 Join Date: Jun 2011 Location: Michigan Posts: 14 iTrader: 0 reviews	Knocking/ Detonating problem NEED HELP Hi everyone. Im having a problem with my Mach knocking under load. At first i thought it was my fuel pump giving out but my injectors have a constant 40 lbs behind them so i dont think it is a fuel issue. The car has a C&L CAI and 85mm mass air flow. Im begining to think the maf is going bad. A guy at a tuning shop told me C&L tends to run 10%ish lean. What gets me is about a month ago it was fine and i havent changed anything. Does anyone have any ideas? Tonight I'll post some of the scanner data. Thanks for any help Andrew __________________

June 18th, 2011, 12:58 PM	#2
SS EATR Regular 2003 Mustang Mach 1 Join Date: Jun 2011 Location: La Crosse, VA Posts: 148 iTrader: 0 reviews	clean the maf meter first amd see but with it being new i wouldnt think thats the problem, try pulling some timing out of the high rpms see if that helps any too __________________ 2003 Mach 1 Oxford White K&N intake, Magnaflow Exhaust

June 21st, 2011, 12:30 AM	#3
DSGmach395 Newbie 2003 Mustang Mach 1 Join Date: Jun 2011 Location: Michigan Posts: 14 iTrader: 0 reviews	I did try cleaning it a little while ago and it didn't seem to help. I'm hoping a tune will help, I ended up ordering the sct sf3/x3 from American Muscle. The guy from Bama said they should be able to fix it. I am anxiously waiting for it to come in the mail! __________________

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