Throttle sticking
Throttle sticking
05-15-02, 12:16 PM
#3
Bluegr*** Performance
Join Date: Feb 2002
Location: North Kentuckarolinay
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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.
05-15-02, 01:09 PM
#4
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 This is common on earlier cars and if you do replace it make sure you get the updated superseded TPS.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.
saw it in the FAQ thats going around here somewhere.
05-15-02, 11:56 PM
#5
Driver
Join Date: May 2001
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Originally posted by VSsc400
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.
what does the TPS exactly for? If the sensor is bad, will a check engine light trigger?
007
saw it in the FAQ thats going around here somewhere.
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.
what does the TPS exactly for? If the sensor is bad, will a check engine light trigger?
007
saw it in the FAQ thats going around here somewhere.
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