Car fails to accelerate

20Mustang02 · October 15th, 2009, 10:39 PM

I have a '02 Mustang V6 recently I've noticed whenever I try to accelerate (esp. uphill or slight slope) the car fails to accelerate and sometimes it even slows down to less than 25mph even while pressing the pedal... The only time I can really make it go is if I hold the pedal down and even then it struggles to go past 2000rpm

Today while driving it jerked a bit and then slowed down...I heard sort of a air tapping sound and pulled over there was grayish white smoke coming for the exhaust

The check engine light has now come on and it throws the code about the EGR Valve is getting too much flow..

Any suggestions on what the problem could be?

sand1303 · October 15th, 2009, 11:10 PM

catylitic converter clog? just a guess. don't know anything about the egr but if you have a code what is it. give the actual code

GreenFaleen · October 15th, 2009, 11:19 PM

smoke makes me want to say head gasket. but that would be more blueish and all the time

code is probably bad rear o2 sensors, and the accel problem id blame of the cat so get new cats new rear o2(probably killed by the cats dumping fuel on them) and you should be ok,

20Mustang02 · October 15th, 2009, 11:36 PM

Originally Posted by sand1303

catylitic converter clog? just a guess. don't know anything about the egr but if you have a code what is it. give the actual code

The exact codes are p401 & p402

sircrashalot · October 16th, 2009, 12:44 AM

sound like you have a blown head gasket.... white smoke is coolant burning. in cylinder.

sircrashalot · October 16th, 2009, 12:45 AM

Originally Posted by GreenFaleen

smoke makes me want to say head gasket. but that would be more blueish and all the time

code is probably bad rear o2 sensors, and the accel problem id blame of the cat so get new cats new rear o2(probably killed by the cats dumping fuel on them) and you should be ok,

blue smoke would be piston rings going bad.

6ER THEN I 8ER! · October 16th, 2009, 12:47 AM

to the OP...if your going to have to replace the cats...might at well order Hi-flos now

RFM 40th V6 · October 16th, 2009, 02:28 AM

Not to sound like a dick but you are all heading in the wrong direction.

Your EGR valve is stuck open or staying open.

On the front of your engine not far from the EGR is a black canister with a vacuum line going to the top of the EGR. Unhook the vacuum line from that and see if the problem goes away. If it does replace that actuator. I can't remember the exact name. If that doesn't solve your issue pull a vacuum on the EGR to make sure that it opens and closes.

If the EGR is good and the actuator is ok, replace the DPFE. 98% of the time it's the DPFE.

October 15th, 2009, 10:39 PM	#1
20Mustang02 Newbie Join Date: Oct 2009 Posts: 9 iTrader: 0 reviews	Car fails to accelerate I have a '02 Mustang V6 recently I've noticed whenever I try to accelerate (esp. uphill or slight slope) the car fails to accelerate and sometimes it even slows down to less than 25mph even while pressing the pedal... The only time I can really make it go is if I hold the pedal down and even then it struggles to go past 2000rpm Today while driving it jerked a bit and then slowed down...I heard sort of a air tapping sound and pulled over there was grayish white smoke coming for the exhaust The check engine light has now come on and it throws the code about the EGR Valve is getting too much flow.. Any suggestions on what the problem could be?

October 15th, 2009, 11:19 PM	#3
GreenFaleen MM's Resident Ricer 2006 Scion tC 13.001@113 Join Date: Nov 2006 Location: Raleigh/Lenoir, NC Posts: 9,906 Blog Entries: 2 iTrader: 1 reviews	smoke makes me want to say head gasket. but that would be more blueish and all the time code is probably bad rear o2 sensors, and the accel problem id blame of the cat so get new cats new rear o2(probably killed by the cats dumping fuel on them) and you should be ok, __________________ Scion Tc Turbo - 9psi 297whp 287wtq 2500lbs :p MM 4 Banger club: Senior Ricer NCMM #9 "Horsepower sells cars, torque wins races." -Carroll Shelby

October 16th, 2009, 12:47 AM	#7
6ER THEN I 8ER! Premium Member 3.9L V6 Join Date: Apr 2007 Location: Portland, TN Posts: 20,970 iTrader: 1 reviews	to the OP...if your going to have to replace the cats...might at well order Hi-flos now __________________ [SIGPIC][/SIGPIC] 6k HIDs - Rear Sway Bar - Mac Prochamber - Goodridge Gstop SS Lines - Lots of Visual Fun - Go Fast Mods (no point in buying...it's a v6) Want to see your car as art...ask me how

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October 15th, 2009, 11:10 PM	#2
sand1303 Newbie Join Date: Aug 2009 Posts: 11 iTrader: 0 reviews	catylitic converter clog? just a guess. don't know anything about the egr but if you have a code what is it. give the actual code

October 16th, 2009, 12:44 AM	#5
sircrashalot Newbie Join Date: Oct 2009 Posts: 27 iTrader: 0 reviews	sound like you have a blown head gasket.... white smoke is coolant burning. in cylinder.

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