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tedfrk · 03-21-2007, 08:45 PM

the idle is only fast when it is first started up and slow down when warmed up.the fuel pump was just changed as well but had this problem before.i will check tomorrow to see if the a/c effects it .when i push on the brakesit is fine but when you put it in any gear it goes down to about 100to 200 rpm on the dash tach.

03-21-2007, 08:45 PM	#4
tedfrk Registered User Join Date: Feb 2005 Location: forked river nj Posts: 147	Re: 1993 suburban very low idle in gear the idle is only fast when it is first started up and slow down when warmed up.the fuel pump was just changed as well but had this problem before.i will check tomorrow to see if the a/c effects it .when i push on the brakesit is fine but when you put it in any gear it goes down to about 100to 200 rpm on the dash tach.