1999 Suburban Bad Acceleration - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72truckman · 06-06-2009, 07:51 PM

My 1999 Suburban has been running really badly lately. Changed distributor cap, fuel filter and did the typical maintenance. But, when i floor it off the line it will hold 1st gear at about 4500rpm until i let off of it, then it will shift into second. And, getting to 4500rpm is doggishly slow. It seems to sputter and almost miss. but when i only feather the pedal, it runs great and shifts well. any idea of my problem?

clinebarger · 06-06-2009, 11:00 PM

Have you checked fuel pressure? i think the spec is 60-66 psi. check engine light? A plugged catalytic conveter may also cause this problem.

06-06-2009, 07:51 PM	#1
72truckman Registered User Join Date: Mar 2006 Location: San Ramon, California Posts: 276	1999 Suburban Bad Acceleration My 1999 Suburban has been running really badly lately. Changed distributor cap, fuel filter and did the typical maintenance. But, when i floor it off the line it will hold 1st gear at about 4500rpm until i let off of it, then it will shift into second. And, getting to 4500rpm is doggishly slow. It seems to sputter and almost miss. but when i only feather the pedal, it runs great and shifts well. any idea of my problem? __________________ My 1972 Blazer 5.3 E85/ NV4500 5spd 4x4 Work in Progress http://67-72chevytrucks.com/vboard/s...d.php?t=291482 **SOLD!!!!!** 1965 GMC 4X4 http://67-72chevytrucks.com/vboard/s...d.php?t=294727

06-06-2009, 11:00 PM	#2
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 1999 Suburban Bad Acceleration Have you checked fuel pressure? i think the spec is 60-66 psi. check engine light? A plugged catalytic conveter may also cause this problem.



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