Anybody else ever had a sticky throttle? The pedal doesn't want to go down. I've WD-40'd it, but no help.

Anyon else get this?

 

Very possibly you have to clean the throttle body.

 

Someone else was talking about making sure the throttle body is clean when changing spark plugs as this must be removed for that job. It is very possible that this is the problem.

 

Many if not ALL high mileage SC's (especially 400's with 90k and above) develop ALOT of carbon buildup on the inside of the throttle body which blocks air flow when the throttle is lightly pressed. The plenum moves just a tad but the air flow is still blocked from the carbon buildup. The solution is to remove the throttle body and remove this carbon buildup with a good quality carb/FI cleaner. The carbon buildup is between the throttle body and the intake so it is not possible to clean it through just the opening on the TB. It must be removed. Remove the rubber intake boot and the 4 bolts on the TB. The bottom of the TB has two coolant hoses used to heat it up in colder climates. Remove those. Now remove the crankcase hose from the bottom. That's it. Be careful as the hoses may be brittle and we recommend replacement at this time. The total time-1hr. Secondly check the TPS (throttle position sensor) for wear. This is common on earlier cars and if you do replace it make sure you get the updated superseded TPS.


saw it in the FAQ thats going around here somewhere.

 

 

what does the TPS exactly for? If the sensor is bad, will a check engine light trigger?

also whats good cleaner to clean inside t-body?

007

 

according to the direction it says to check it for wear. I agree with you that if it was worn the check engine light would come on. I'm sure any good name brand carb cleaner (motorcycle speed shop) should have a good one. Don' know the name.