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naynay
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Join Date: Feb 2010
Posts: 1

1991 Geo Tracker - Stuck Choke Valve

02/08/2010 9:06 AM

I have a 1991 Geo Tracker. This cold weather has the choke valve in a stuck position. The engine sounds as if it is idle very high. Where do I find the choke valve and how do I make the adjustment please?.. Thank you Naynay..
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Pathfinder Tags: choke Idle
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tcmtech
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Join Date: Jun 2009
Location: South of Minot North Dakota
Posts: 8376
Good Answers: 775
#1

Re: Geo Tracker Choke Valve

02/08/2010 2:13 PM

The 91 geo trackers used a throttle body fuel injection system. Thats why you cant find a choke valve. Most likely you have one or more engine sensors and or control devices that are bad.
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bob c
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Join Date: Jul 2007
Location: Fort Lauderdale Florida
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#2

Re: 1991 Geo Tracker - Stuck Choke Valve

02/08/2010 10:42 PM

When the engine is operating in cold weather, it needs a richer mixture, and a higher speed to prevent stalling.

If your temperature sensor is bad, or if your thermostat is bad, or has been removed, the engine will stay in the cold/rich/fast mode. I hope this helps. Good luck.

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 Bob
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Anonymous Poster
#3

Re: 1991 Geo Tracker - Stuck Choke Valve

02/09/2010 8:18 AM

Check for a possibly stuck IAC (Idle Air Control) valve problem. Most service manuals will describe how to check the IAC valve.
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