Throttle Body Sensor?????
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Freshman User
Joined: Feb 2004
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Throttle Body Sensor?????
I talked to a friend of mine with a 98' f150 that was having similar automatic transmission problems and poor gas mileage. He said that no one at the tranny shops could figure it out without tearing in to it. So he took his truck to the dealership to get a diagnostics ran on it and it showed that his throttle body sensor was bad. He said after they replaced it, that his problem was fixed? Truth to this, Maybe???
Senior User
Joined: Feb 2004
Posts: 146
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From: LaGrande, OR
Never heard of a throttle body sensor. Throttle position sensor on the other hand is a possibility. This is possible because the ECU wouldn't know how to achieve a good air to fuel ratio because it doesn't know how much air is coming in. Also the tranny's shift points would be messed up cause it uses throttle position in part when deciding to shift. To test this you'll need a multimeter. There is a post somewhere in the 4.6 5.4 mod engine forum that explains how to calibrate this. See this post and check if you get the correct voltages. If I remeber correct you need to put the meter between the wire with the red stripe and the grey stripe, but again, it's been awhile. You should get below 1.00 volt at idle and just below 5.00 (~4.73) volts at wide open throttle.
Senior User
Joined: Feb 2004
Posts: 146
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From: LaGrande, OR
No, not sure what engine you have but it will be on the the side of the throttle body held on by two phillips screws. The screws are really tight and they suggest and impact screwdriver but I was able to get it off with a regular one. just remove the connector to, take off the screws and put the new one on. I assume that as long as you stay with the stock throttle body you won't have to calibrate it but I may be wrong.
Hotshot
Joined: Jan 2004
Posts: 19,767
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From: St Louis
There is no factory "calibration" for the TPS. Just screw it on like the manual says.
Many "tweakers" like to manually adjust the sensor to optimize its setting. While this may show some benefit for some, it is not required during a routine replacement.
Steve
Many "tweakers" like to manually adjust the sensor to optimize its setting. While this may show some benefit for some, it is not required during a routine replacement.
Steve
