poor cold running condition
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Senior User
Joined: Jan 2006
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poor cold running condition
Trying to get some ideas before I dig into this problem further.
94 F-150 2wd 302. I get cold engine poor performance. I start the truck up, I usually let the idle come down before I start driving, but for the first couple mins of driving, the engine is sluggish and one thing I notice, I have a tiny exhaust leak at the y pipe. When I am getting this couple mins of sluggishness, the exhaust leak get way louder.
What I am thinking, maybe its a sensor problem causing the a/f mixture to go nuts till the engine gets warm. What else would cause the exhaust leak to get much bigger (when its warm and normal running, you cant hear the leak under any load really) <-- this leads me to think the Cat is fine, if the cat was clogged it would have poor performance all the time right?
I have a hunch the ETC sensor might be going, could this cause this poor cold running issue, something with closed loop operation, and furthermore, could this cause the exhaust leak symptom.
anyother avenues I can look into?
94 F-150 2wd 302. I get cold engine poor performance. I start the truck up, I usually let the idle come down before I start driving, but for the first couple mins of driving, the engine is sluggish and one thing I notice, I have a tiny exhaust leak at the y pipe. When I am getting this couple mins of sluggishness, the exhaust leak get way louder.
What I am thinking, maybe its a sensor problem causing the a/f mixture to go nuts till the engine gets warm. What else would cause the exhaust leak to get much bigger (when its warm and normal running, you cant hear the leak under any load really) <-- this leads me to think the Cat is fine, if the cat was clogged it would have poor performance all the time right?
I have a hunch the ETC sensor might be going, could this cause this poor cold running issue, something with closed loop operation, and furthermore, could this cause the exhaust leak symptom.
anyother avenues I can look into?
Lead Driver
Joined: Feb 2003
Posts: 8,140
Likes: 4
From: Oak Harbor, OH
The AIR pump SHOULDN'T have any effect on power. It's going to be a sensor failing. You need to pull the codes, at most even a failing AIR pump will only pull 5hp. That's not enough of a power loss to notice.
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
most of the answers were yours.
seriously, you need to pull codes but i still vote ect.
maybe a corroded or loose connection that when you were playing with the air pump it fixed itself.
what in particular did you do to the air pump from the other forums recommendation?
seriously, you need to pull codes but i still vote ect.
maybe a corroded or loose connection that when you were playing with the air pump it fixed itself.
what in particular did you do to the air pump from the other forums recommendation?
