My truck has been acting up as of late. It seem as though it is idling quite high. 1500 RPM in park. Once I shift into drive it goes back down to about 1000 RPM. When shifting I get a very large kick when shifting into reverse, then shifting into drive from reverse another large kick.

Wondering if anyone else has experienced this and what could possibly be causing this. What to do to fix it would be helpful also.

Thanks

 

Throttle Position Sensor..first check for a dirty butterfly valve on the throttle body though!

 

How would I go about check that? Just pull the air box off and look in there?

 

It is the sensor on the side of the throttle body (top one)..if you are looking at the engine bay then it is on the right side of the throttle body. The one on the bottom is the idle air control valve and the one on top is the TPS. Cleaned both of them with an electrical cleaner aerosol spray. To clean the butterfly valve just remove the intake tube from the throttle body and get any carbon buildup off of the golden plate you see in there. Spray a cleaner on the rag and then carefully remove it..or just unbolt it and clean it off the truck

 

06Dako4.7Silver has good advice. One extra little thing I'll add to it... do NOT manually move the TPS around by hand. It is a fairly fragile sensor.

If you do, or of the cleaning doesn't solve it, no big deal. They are not that expensive, and can be found at any auto parts store. If I recall correctly, O'Reillys has one made by BWD that is about $30-$40, and has a lifetime warranty. I think it was a few dollars more than Advance or AutoZone, but that lifetime warranty (and I tested it, they do honor it) is very handy for small sensors.

 

Do you have a fastman throttlebody?

 

Stock throttle body.

 

you could also check the MAF too, thats what eased out my idling on my old truck, not sure how it affects shifting though.

 

The kick while shifting is probably caused by the high idle in park and neutral. The transmission is supposed to shift into drive at about 1000 RPM and when the truck in idleing at 1500 RPM it puts extra torque on the transmission, thus causing that huge kick.

 

We do not have a MAF.

But more idle issues are caused by a bad sensor, but mostly on our truck, a dirty sensor.

4 possible senors. Could be only one, could be all 4

1. Throttle position sensor needs cleaning - (located in throttle body)
2. IAC (idle air control) needs cleaning - (located in throttle body)
3. IAT (intake air temp) needs cleaning (located in air intake tube)
4. Cam position sensor needs replacing. (located on the end of the engine)

You probably have a dirty IAC <--- my vote