high idle

	Blazer Forum Classifieds Photo Gallery Search Contact BF Sponsors
Blazer News Member List Forum FAQ Timeslips Recalls TSBs Calendars Register Login

high idle

Printable Version

Blazer Forum >> Mechanical & Maintenance >> General Tech Help >> 1st Gen S-series (1983-1994) Tech >> high idle

Page: [1]

Message

<< Older Topic Newer Topic >>

high idle - 2/12/2006 6:49:36 PM

slicker

Posts: 2
Status: offline

hey guys I've got a 91 blazer with a 2.8 ,5 speed and lately i'll start it up and it warms up and all but as soon as i start driving it will rev up to about 2500 and stay there the whole time i'm driving from time to time it will come back down but mostly stays revving high and suggestion? or what i could do to fix this problem, thanks alot appreciate any feedback

Post #: 1

RE: high idle - 2/12/2006 6:55:00 PM

4lowlife

Posts: 1562
Joined: 12/29/2005
Status: offline

Is the throttle cable sticking?
Under the hoood can you open and close the throttle? It may be the malfunctioning throttle position sensor.

(in reply to slicker)

Post #: 2

RE: high idle - 2/12/2006 6:57:39 PM

slicker

Posts: 2
Status: offline

thanks for replying but no the cable isnt sticking I thought that at first and i even took the cable off and started the truck and still it was revving high after i just got back from driving all day

(in reply to 4lowlife)

Post #: 3

RE: high idle - 2/12/2006 7:02:56 PM

swartlkk

Posts: 15304
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

I'm not sure if the '91 2.8L has an IAC valve, but if so, it may be malfunctioning. It may just be time to pull the throttle body off and give it a thorough cleaning.

_____________________________

Kyle-