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Old 05-26-2012, 09:07 PM   #1 (permalink)
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Throttle body Sensor

hey guys, My car has a problem in the morning laying down on itself. it starts fine; it just will not go past 2k rpms. I can take the key out and restart and then its fine. Took it to the shop and they say I need a 681.00 dollar part?? Any suggestions?
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Old 05-27-2012, 12:01 AM   #2 (permalink)
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It's not a throttle body sensor. It's called a Throttle Position Sensor. As with all sensors they go bad occasionally. It could be the Trottle Actuator as well, but the only real way to know for sure is to have the OBD system scanned for codes. If their is a problem the computer will have stored a code giving you an indication of what is wrong. Most auto parts stores do this for free.

All cars made after 1995 are required to have OBD capability.
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Old 05-27-2012, 03:55 AM   #3 (permalink)
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If you do let it run in the flat state, does the performance pickup as the engine warms up, or does it stay flat until the engine is turned off and then restarted?
It could also be an issue with the MAF, a simple test with that is to simply disconnect the wire from the MAF and see if the problem disappears, you will be down on power, but it should eliminate the flat performance when first started.
Has there been any work done on the car prior to this issue first presenting?
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Old 05-27-2012, 05:17 PM   #4 (permalink)
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Thanks! I already had it scanned, there are about six codes it is throwing. All related to throttle body position as well as sensor. My mechanic reset them during an oil change and they reoccured. I was just seeing if anyone had any suggestions on where to get the assembly cheaper than 681.00???
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Old 05-27-2012, 05:19 PM   #5 (permalink)
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Have not tried that! You can let it run and after 5 or ten minutes it will take off. Only seems to do it in the mornings. Sometimes it does not do it at all for weeks! Pretty nuts!
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Old 05-28-2012, 04:50 AM   #6 (permalink)
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Is it possible that the throttle body is a little sticky? Is it worth spraying some sort of lubricant into the pivot points (use something that is ok to be drawn into the combustion chamber.)
See if that has any affect. Just an idea
Seafoam make an aerosol product which can be sprayed directly into the throttle body, that may have some theraputic properties.
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