ok i drove through a river about a foot and a half deep sunday and stalled the truck.. checked everything to make sure no water got into anything and everything seemed fine.. tried and it started fine.. but on the very last of this rough country road (2hr drive) when it leveled out and the truck was supposed to shift to third my check engine light came on.. and now it only shifts at high RPM's.. and shifts with a hard knock/bang when doing so..

had the truck at the garage this morning and these codes came up..

Throttle position sensor perform (P0121)

MAP Performance (P0106)

MAF Sensor Circuit Low Freq (P0102)

MAF Sensor Circuit High Freq (P0103)

so i was wondering if anyone else might have come into the same problems.. and might have some advice tips for me as the garage says it might be 2 weeks before they get to look at it and a week to diagnose the "real" problem.. and other garages say the same thing.. and i don't have alot of money to be throwing out for $300 parts if i don't need them..

EDIT: also i noticed that when unplugging the MAF sensor there is no change in the idling.. could the MAF sensor be gone or just a bad connection..???

THX to any and all who might be able to shed some light on this THX





FIXED:Turns out it was the Throttle position sensorafter all..

 

This is exactly the issue that my 2000 is having after having it in water.

Anybody got an answer to this?

 

Nevermind last post...

I realized he put the answer at the bottom of his original post.

This was exactly my problem so I will give metal head the credit for fixing my blazer, I just had to turn the wrench.

 

LOL!