RPM Change - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Texasline · 02-09-2011, 03:04 AM

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.

02-09-2011, 03:04 AM	#1
Texasline Registered User Join Date: Dec 2010 Location: San Diego CA. Posts: 20	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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