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11-14-2004, 06:05 PM | #1 | |
AF Newbie
Join Date: Nov 2004
Location: Hawley, Minnesota
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90 5.7 tbi half power until I move a switch?
Thanks for letting me join your forum!
I've got a 1987 suburban 5.7 TBI (engine is a 90) that you can be driving along fine then drops to about half power. Now here's the weird part.... Wiggling the key in the switch (while driving) made it go full power than half again. Changed the switch...no help. Moving the heater switch....same thing. While rolling the electric back window, runs OK with switch depressed, let go, it goes to half power. Same thing. Sometimes it idles fine and others pulsates. Any Clues? Thanks in adavance. Scott ScottND (at) hotmail (dot) com |
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11-14-2004, 08:34 PM | #2 | |
AF Enthusiast
Join Date: Sep 2004
Location: Herminie, Pennsylvania
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Re: 90 5.7 tbi half power until I move a switch?
check you alternator and battery and if they all check out ok then check you grounds
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02-15-2005, 09:33 AM | #3 | |
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Re: 90 5.7 tbi half power until I move a switch?
ScottND,
Did you ever figure out your problem? |
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02-18-2005, 07:20 PM | #4 | ||
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Re: Re: 90 5.7 tbi half power until I move a switch?
Quote:
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