NEED HELP: 2.3l idle problem/ oil sending unit - - Home of Canadian Ford Truck Enthusiasts

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post #1 of 3 (permalink) Old 10-02-2011, 05:51 PM Thread Starter
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Location: saskatoon, sk
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2.3l idle problem/ oil sending unit

hello. I've got an '89 ranger with a 2.3l distributorless ignition system. The truck will be running fine then, when I come to a stop, the engine will rev up and won't idle down even if I push the gas pedal. It doesn't do this all the time but it does do it a lot. I'd say about 70% of the time. I've heard that a faulty iac valve can stick and cause this problem. I checked my hayne's manual and it doesn't even mention an iac valve. So, I'm not sure what the problem can be. If anyone can give me some advice, I'd greatly appreciate it.

Also, does anyone know where the oil sending unit is. My oil guage needle works on and off and so I think the o.s.unit needs replacing. thanks in advance.
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post #2 of 3 (permalink) Old 10-03-2011, 08:37 AM
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Haynes may call it an idle air by-pass valve but it's located on the throttle body and the oil pressure sender is located on the left rear side of the cylinder head, probably down behind the egr unit. Check your engine to cab/chassis ground wire first though. That might be the cause of both problems.

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post #3 of 3 (permalink) Old 10-04-2011, 07:08 AM
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Sounds like to me that either or throttle is sticky occasionally or the IAC is due for a good cleaning. I would clean the throttle body and IAC before considering digging any further into it, replace the gaskets don't re-use them.

2009 Ranger Sport 2WD 4.0L/3.55:1/5spd Bone Stock.
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