How to replace TPS
Elder User
Joined: Nov 2002
Posts: 790
Likes: 0
From: Norwood USA
How to replace TPS
Autozone tested my check engine codes and it said the TPS voltage was low and that it needed to be replaced. I bought a new one and it looks like it plugs right in and just screws the sensor to the throttle body...In my Haynes manual it says that I need to adjust the sensor with a negative something or other...Has anyone done this on a 5.0 EFI engine (Mines a 1992), and if so what do I have to do? Thanks.
"My big Bronco thing will crush your little Jeep thing"
"My big Bronco thing will crush your little Jeep thing"
Senior User
Joined: Jun 2002
Posts: 241
Likes: 0
From: Colorado Springs, CO
How to replace TPS
I've been meaning to replace mine for a while. I tried to, but I can't get to the phillips screws with a screwdriver or an L shaped screwdriver(don't know the name for that) b/c I can't put enough pressure on it. There's just no room for my fingers and the tool. A metal coolant tube is blocking the way, as well as the crankshaft underneath it?. I don't want to totally take off the throttle body either. I started to, but it's on there real good and I'm afraid a messing up the bolts.
If I can find a wratcheted?? screwdrive that might work, but so far haven't found one.
If anyone figures this out let me know.
Brian
1988 351 EFI
If I can find a wratcheted?? screwdrive that might work, but so far haven't found one.
If anyone figures this out let me know.
Brian
1988 351 EFI
Laughing Gas
Joined: Nov 2002
Posts: 1,143
Likes: 18
How to replace TPS
only way i can figure to replace a tps is to take off the throttle body. 4 bolts is all you have to remove. wouldn't hurt to stick a new gasket in there either. i've done this twice. there's simply not enough room to get to the screws decently. i don't know anything about adjusting, but the chiltons manual says to turn it clockwise till you reach the screw holes. i didn't see any difference than just sticking in there.
Senior User
Joined: Jun 2002
Posts: 241
Likes: 0
From: Colorado Springs, CO
How to replace TPS
I guess I'll go ahead and take the throttle body off then. I didn't have a new gasket when I was trying to put the TPS on and that's another reason I didn't take it off the first time. While I'm at it I'm going to get a new Idle Air Bypass Valve. I'm having surging problems and those 2 things are the last thing left to try! Hope it works.....
Thanks
Thanks
Freshman User
Joined: Nov 2002
Posts: 46
Likes: 0
From: Las Vegas US
How to replace TPS
Yes, you need to adjust the sensor when installed. There isn't much room for adjustment as the screw holes aren't usually ovaled, but it is very touchy. Unfortunatly it's been some time since I had to adjust one, but I think you do it "key on, engine off" and look for a certain voltage output from the sensor. Mis-adjustment or a bad sensor will cause a "bouncing" or erratic idle usually more present while in gear and stopped.
