Bad idle after h-pipe install? (Full Version)

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Bad idle after h-pipe install?

  

Erik92gt -> Bad idle after h-pipe install? (3/13/2003 8:44:01 PM)

I found an h-pipe at my local bone yard. couldnt pass up the deal $25 for it. Ever since I put it on the idle would go from 400-1100 would keep bouncing, I had it on long enough figuring it would level itself out. My ? is could it be the fuel that its not getting enough, or cause when i found it, it still had the old H2 sensors in it? Maybe they are bad?

  
91GT5.0 -> Bad idle after h-pipe install? (3/13/2003 9:14:22 PM)

Most likely O2's. If not them, then possibly an exhaust leak, but I don't think an exhaust leak would cause it to idle like that. Put the O2's from your old h-pipe, that should solve the problem.

gotspeed87 -> Bad idle after h-pipe install? (3/14/2003 2:16:00 AM)

yea try the old o2 sensers or why dont you go and buy some new ones also remember when you take out the "cats" the computer has a tough time trying to adjust for the increase in exhaust flow

91GT5.0 -> Bad idle after h-pipe install? (3/14/2003 1:05:06 PM)

Mine was fine right when I put the X on, the O2's are before the cats, so the comp shouldn't have too much trouble. Only thing it may freak about is the sudden loss in exhaust pressure.

Erik92gt -> Bad idle after h-pipe install? (3/14/2003 3:34:08 PM)

I have checked for leaks or anything like that so the only other thing is it must be the bad o2 sensors.

noslow50 -> Bad idle after h-pipe install? (3/14/2003 6:21:00 PM)

No it is the o2's nothing else would casue that... my ? how many o2's r a 95 gt supposed to have??? mine has 2...

keller5.0 -> RE: Bad idle after h-pipe install? (6/10/2007 9:48:24 AM)

It is should only have 2.  Change them and your your problem is solved.

92GreyGT -> RE: Bad idle after h-pipe install? (6/10/2007 12:33:24 PM)

I had the same problem once. Do you still have all of the emissions equipment under the hood? I was changing a clutch and had to wrestle the air tube that comes from a solenoid behind the smog pump. There is a diaphram that is inside that must have split and caused a vacuum leak. Take the vacuum line off of the valve and see if that helps.

hatchdemon89 -> RE: Bad idle after h-pipe install? (6/10/2007 12:59:25 PM)

sounds like a smog problem or o2 sensor rip the smog out or just buy two new o2 sensors its pricey but i went threw the same thing

mattdel -> RE: Bad idle after h-pipe install? (6/10/2007 2:38:50 PM)

quote:

ORIGINAL: gotspeed87

yea try the old o2 sensers or why dont you go and buy some new ones also remember when you take out the "cats" the computer has a tough time trying to adjust for the increase in exhaust flow


thats the dumbest thing i've ever heard

  

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