What's Wrong?

limited · January 7th, 2012, 01:51 PM

just remove the front o2's and take it for a spin to see if it is better, will be noisy and set the light but if it the cats starting to plug it will rev past 4k by creating a exh leak before the cats

SON1C · January 7th, 2012, 01:52 PM

i meant front 02s rear only check for cats working, you could always send your chip to get retuned

TheOdessa · January 7th, 2012, 02:15 PM

So on the MAF test of disconnecting it... if the car dies then it's good right? What if the car drops idle but regains and then idles the same?

04 BEAST · January 7th, 2012, 02:18 PM

Originally Posted by SteeD43

02s?

I thought he said unplug the MAF!

04 BEAST · January 7th, 2012, 02:23 PM

Originally Posted by 86er

quick maf test. Start run the car at idle. Pay attention to how it runs if its rough, smooth, slight wondering idle etc. Then unplug the maf, see if anything changes. If nothing changes, your maf is faulty, if it changes, move on to your next thing to check

SEE^^^

laoutlaw01 · January 7th, 2012, 10:18 PM

I have cleaned and tried to unplug the maf,it dies like its supposed to. I'm hoping to have time to try the convertors Tommorow evening after work. I had to tint a 05 gt this evening so i didnt have time .

Jason4.6GT · January 8th, 2012, 12:52 AM

If its the 02 sensor you can smell raw fuel in the exhaust, which is a rich a/f mixture. If its the cat you'll notice it getting excessively hot, like red to the naked eye. The fuel pump wouldnt cause bad mileage unless its a high pressure pump, which i imagine its stock. The maf test could also be done my tapping the top of it while the car is running.

03Black2v · January 8th, 2012, 01:21 AM

Yea, when I did the MAF test, it didn't die.

January 7th, 2012, 01:51 PM	#21
limited Premium Member 99 limited edition vert Join Date: Mar 2007 Location: Tacoma,Washington Posts: 3,297 iTrader: 0 reviews	just remove the front o2's and take it for a spin to see if it is better, will be noisy and set the light but if it the cats starting to plug it will rev past 4k by creating a exh leak before the cats __________________ KB'd 446rwhp/451rwtq, Mustang Dyno http://www.youtube.com/watch?v=3ZDpQ0EEm1M Tuned by Joe at http://www.tricktuners.com

January 7th, 2012, 01:52 PM	#22
SON1C Run ur car, not ur mouth. 2003 Sonic Blue 4.6L Join Date: Jul 2010 Location: Northern Virginia Posts: 4,047 Blog Entries: 1 iTrader: 3 reviews	i meant front 02s rear only check for cats working, you could always send your chip to get retuned __________________ 238rwhp/263rwtq Drew's Build Thread

January 7th, 2012, 02:15 PM	#23
TheOdessa Chitty Chitty Bang Bang 2001 Mustang GT Join Date: Jun 2011 Location: Tampa, Florida Posts: 1,254 iTrader: 2 reviews	So on the MAF test of disconnecting it... if the car dies then it's good right? What if the car drops idle but regains and then idles the same? __________________ 2001 Mustang GT 5-Speed God Created Man, but Sam Colt Made Them Equal

January 7th, 2012, 10:18 PM	#26
laoutlaw01 Regular Join Date: Oct 2011 Posts: 381 iTrader: 0 reviews	I have cleaned and tried to unplug the maf,it dies like its supposed to. I'm hoping to have time to try the convertors Tommorow evening after work. I had to tint a 05 gt this evening so i didnt have time . __________________

January 8th, 2012, 12:52 AM	#27
Jason4.6GT Regular 2002 Mustang GT 9.2@80 in the 1/8th Join Date: Oct 2011 Location: La Vergne, TN Posts: 134 iTrader: 0 reviews	If its the 02 sensor you can smell raw fuel in the exhaust, which is a rich a/f mixture. If its the cat you'll notice it getting excessively hot, like red to the naked eye. The fuel pump wouldnt cause bad mileage unless its a high pressure pump, which i imagine its stock. The maf test could also be done my tapping the top of it while the car is running. __________________

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