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02-09-2011, 03:04 AM
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#1 |
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Registered User
Join Date: Dec 2010
Location: San Diego CA.
Posts: 20
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RPM Change
Howdy,
My 86 Chevy has made a change...by itself. Why would the RPM's change? I have tachometer that shows the RPM's. Previously on start up the RPM's were about 500 and full speed(65mph) about 2200 RPM's. Recently, I've noticed them being about 350 at start up and about 2100 at full speed. It does not stall initially but requires more gas pumping than it used to. It used to not need any revving but now does after a cold start. Why would it change by itself? And should I fix it...and how? Otherwise Grandpa's truck it doing OK. However, I did read the "Death Wobble"  thread and have become paranoid enough to take it in for some tire rotation and alignment.
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02-09-2011, 03:31 AM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: RPM Change
Weather and carb conditions affect RPMs. Clean up the carb really good. Lube the linkages with WD-40. Check the tach connection. Tach ground may be a problem.
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02-09-2011, 11:14 AM
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#3 | |
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Canadian Trucker
Join Date: Nov 2010
Location: Sarnia, ont canada
Posts: 648
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Re: RPM Change
Quote:
__________________
 2020 Silverado Trail Boss - 6.2/10spd |
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