Car Information:
Chevrolet S-10 Pickup Truck
Year: 1996
Engine Size: 6 cylinder, 4.3L
Trans: Automatic

Issue / Question:
Dear Larry and staff,
We had previously used your shop when we lived in the Orlando area and enjoyed listening to you on WDBO. Almost three years ago, we had to move to Missouri to help take care of my father-in-law.
My son’s pickup is having problems with the throttle sticking. Our shop here, which we found via word of mouth and have been happy with, has done some work replacing a sensor and vacuum as indicated by the diagnostics. No luck and the truck is currently not safe to drive. They have also disconnected the cruise control in case that was the problem.

Engine is idling in the 900’s. They say it should be in the 600’s. Truck has about 124,000 miles on it and since moving up here has been driven in wintry conditions. In the truck’s repair history (it previously belonged to my father-in-law who gave it to my son about 5 years ago)- the EGR valve was replaced; the R & R idler arm was replaced; the rear oxygen sensor has been replaced twice; and about 8,000 miles ago, the throttle position sensor was replaced and the throttle body was cleaned as indicated by a check engine light and subsequent diagnostics.

The shop has a couple of other things to check but their thoughts right now are replacement of the truck’s computer at about $500 refurbished or $1000 new. The truck has been good transportation and we like that we know its’ repair history. We were also hoping to hand it down to our other son next year.

Do you have any suggestions, experiences? Are there any Internet sites that have reliable information on them that we might try? Should we get a second opinion – we have another mechanic who has been recommended to us? We don’t want to cause hard feelings with our current mechanic. Or, should we be in the market for another vehicle?

Any help you can provide would be very much appreciated! Thank you so much for your time!

Answer:
It could be a improperly adjusted throttle position sensor and they may not have the proper scan system to set it correctly. A high idle usually isn’t caused by a bad computer. Throttle position sensor mis-adjusted or a vacuum leak is normally the cause, a leaky gasket under the EGR can also cause this conditio. It’s doubtful the shop your using is intentionally trying to take advantage of you, they simply may not know what to do! Give the other shop you were referred to a shot you don’t have to have an open confession with the shop your using right now just let the other shop take a look at it!

Since I’m now involved (thanks a lot!) Let me know what happens,
Good Luck
Larry

For professional auto repair & services in Orlando you can call our shop today at 407-629-2661.

Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
 • (407) 298-7447