This is topic hesitation after long tube install in forum Tech Talk at Northern California Ford Owners  .


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Posted by saclve (Member # 13280) on :
 
Ok long tubes and shorty x pipe was just installed and now car was hesitating at lower rpm durring acceleration. ?? Exhaust leak idk
 
Posted by Tom Renzo (Member # 13165) on :
 
Better check the tune. You may be lean now just a guess without seeing the issue in person.
 
Posted by saclve (Member # 13280) on :
 
It has no tune I had a sct tuner but sold it, feels more mechanical than that is sure not sure idle seems fine and higher rpm seem fine but u can feel it at lower r pm
 
Posted by POWERED BY FORD (Member # 9204) on :
 
Do you have all 4 o2s plugged in?
 
Posted by saclve (Member # 13280) on :
 
No only front 2 ..
 
Posted by saclve (Member # 13280) on :
 
Thought the rear 02 sensors would have no effect from what I've heard
 
Posted by Wht86drop (Member # 12104) on :
 
Correct. They just monitor the exhaust after the cats. The front ones are important
 
Posted by hurting your feelings (Member # 13641) on :
 
quote:
Originally posted by Wht86drop:
Correct. They just monitor the exhaust after the cats. The front ones are important
If you don't by pass the rears it will throw the mil on.
 
Posted by saclve (Member # 13280) on :
 
Well not worried about cel. Unless it effects performance but the car felt like shit maybe an exhaust leak not sure Jeremy will find the culprit
 
Posted by hurting your feelings (Member # 13641) on :
 
If the cel is on they pcm goes in to open loop.
 
Posted by saclve (Member # 13280) on :
 
My cel has been on from o/r xpipe and car ran great but.. ok so it's a possibility that's is now causing problem I see
 
Posted by hurting your feelings (Member # 13641) on :
 
quote:
Originally posted by saclve:
My cel has been on from o/r xpipe and car ran great but.. ok so it's a possibility that's is now causing problem I see
Ok you know more then the professional.there is a reason why they make mil emulators.
 
Posted by saclve (Member # 13280) on :
 
quote:
Originally posted by hurting your feelings:
quote:
Originally posted by saclve:
My cel has been on from o/r xpipe and car ran great but.. ok so it's a possibility that's is now causing problem I see
Ok you know more then the professional.there is a reason why they make mil emulators.
Lol not even close I posted to get opinions and ideas and help.. thanks guys I think problem may be solved I'll post as soon as I drive it
 
Posted by Tom Renzo (Member # 13165) on :
 
The rear O2sensors monitor cat efficiency and nothing else. If the ses light is on it does not always cause a running issue. He may have forgot to hook up a sensor i am thinking. Just a hunch.

[ 2014-07-14, 05:51 PM: Message edited by: Tom Renzo ]
 
Posted by saclve (Member # 13280) on :
 
He told me he cleared the codes and reset car and unhooked plug wires and started the car and seemed fine.. said it felt alot more powerful than it did yesterday when the issue occurred. Next is comp 268 then a tune sure all problems will go away
 
Posted by Tom Renzo (Member # 13165) on :
 
I am not following you answer one bit. So are your plug wires scraping on the pavement or are they hooked up. What was the ISSUE AT HAND. Clearing codes does nothing for a drivability issue?????
 
Posted by saclve (Member # 13280) on :
 
Car was fixed not sure what the problem was have to ask Jeremy the car felt great alot more powerful but intake manifold capped out again so
 




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