4.2L Engine Problems Please Help!!
New User
Joined: Oct 2004
Posts: 1
Likes: 0
97 f150 4.2l can anyone help?
i had a used 4.2l engine installed in my truck. does not run right. i am fed up w the dealer that istalled it. nothing but a headacke, i took it to my buddy who runs a garage.
heres the problem, idles fine, under accelation no power spits and spudders. when the rpm are almost maxed the engine smooths up.
he has replaced plugs, camposition sensor, removed cat converters, replace both upsteam o2 sensors. adjusted timing compresion test all cylinders (all well), by pass the knock sensor. there is no engine codes
any ideal please help
feel free to call i will call you right back so its my bill (EDIT BY MOD)
david
thank you
Edit: David, Welcome to FTE! Avoid posting your phone number.
Contact David here or PM, or e-mail if you need to.
Thanks,
Brian
heres the problem, idles fine, under accelation no power spits and spudders. when the rpm are almost maxed the engine smooths up.
he has replaced plugs, camposition sensor, removed cat converters, replace both upsteam o2 sensors. adjusted timing compresion test all cylinders (all well), by pass the knock sensor. there is no engine codes
any ideal please help
feel free to call i will call you right back so its my bill (EDIT BY MOD)
david
thank you
Edit: David, Welcome to FTE! Avoid posting your phone number.
Contact David here or PM, or e-mail if you need to.
Thanks,
Brian
Last edited by DTruax; Oct 2, 2004 at 09:50 AM.
Thread Starter
|
New User
Joined: May 2004
Posts: 12
Likes: 0
Check the 90 degree elbow made of rubber behind the upperintake on the left side, mine melted. Its about the size of a half dollar and costs about $6.00 from ford. You can't see it, reach your hand behind the upper intake and feel around while the truck is on... if you hit it, it will hiss... because air will leak out. Replace that elbow! If you don't your truck will gradually run lean and ping.
Jeff
Jeff
Postmaster
Joined: Sep 2003
Posts: 2,887
Likes: 0
From: Florida
Originally Posted by travlnman
Just disconnect the battery, go have a sandwich, and hook it back up, and away you go.
Tom
Postmaster
Joined: Sep 2003
Posts: 2,887
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From: Florida
I know Garrett, i've just been so busy with the house that I haven't been doing anything except settling in. Now that I'm all settled, i'm back to normal.
Scrimpy, who are you talking too?
I'm going to check this "supposed elbow thing-a-ma-jig" out as well.
Tom
Scrimpy, who are you talking too?
I'm going to check this "supposed elbow thing-a-ma-jig" out as well.
Tom
Senior User
Joined: Sep 2004
Posts: 115
Likes: 0
I was asking mjeff cause he is the one that started this thread and then he comes off this elbow thing and was wondering if that fixed the problem or not. I have tried feeling around for this elbow thing I can't seem to find what he is talking about.
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Senior User
Joined: Sep 2004
Posts: 115
Likes: 0
I had another ? if you can't see it then how in the heck are you supposed to replace it. It would really help if I knew what this elbow thing is called because in the chilton book it doesn't have a elbow thing. I might be able to find it if I know what it is called. Could it be called the vwv hose?
Posting Guru
Joined: May 2004
Posts: 1,214
Likes: 0
From: Indiana
TOM you're back! I thought I would never see you around here again!!! I hope your here as an "everydayer" like you used to be.. Why aren't you on MSN messenger anymore? did you get a new address or somethin??
Postmaster
Joined: Sep 2003
Posts: 2,887
Likes: 0
From: Florida
Homer, still on instant messenger with the same address, no change.
Tom
94
vette
@
hotmail
dot
com
The same. I'm back for good now. I was just busy with work and settling into my house...very stressful.
Tom
94
vette
@
hotmail
dot
com
The same. I'm back for good now. I was just busy with work and settling into my house...very stressful.
Postmaster
Joined: Sep 2003
Posts: 2,887
Likes: 0
From: Florida
Mjeff,
What's the latest stat? Are you still having problems? If you really can't figure out what it is and you ARE throwing codes, I'd take it to a dealer. My truck detonates (pings) at high rpms with wide open throttle. No codes thrown. I've checked every thing there is to check and even have a 6 page thread on this site from a few months back. Other than that, the truck runs fine. I still never did find out what the problem is and it still exists. So I just don't full throttle it and if I hear it ping, I let off the gas. Sooner or later, the problem is bound to rear its ugly head.
Yesterday, I did notice that my rear exhaust manifold bold had broken off and I believe there is an exhaust leak between the motor and the header. I'm not sure if escaping gas at high rpms can cause a lean running condition but I just brought it into the dealer so they can remove the broken off bolt inside the motor and thread in a new one. Who knows, maybe I'll get lucky and that will fix my problem. Got my fingers crossed
Tom
What's the latest stat? Are you still having problems? If you really can't figure out what it is and you ARE throwing codes, I'd take it to a dealer. My truck detonates (pings) at high rpms with wide open throttle. No codes thrown. I've checked every thing there is to check and even have a 6 page thread on this site from a few months back. Other than that, the truck runs fine. I still never did find out what the problem is and it still exists. So I just don't full throttle it and if I hear it ping, I let off the gas. Sooner or later, the problem is bound to rear its ugly head.
Yesterday, I did notice that my rear exhaust manifold bold had broken off and I believe there is an exhaust leak between the motor and the header. I'm not sure if escaping gas at high rpms can cause a lean running condition but I just brought it into the dealer so they can remove the broken off bolt inside the motor and thread in a new one. Who knows, maybe I'll get lucky and that will fix my problem. Got my fingers crossed
Tom
