engine code 24 : help to locate the ACT sensor
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engine code 24 : help to locate the ACT sensor
94 3.0 w/AC
symptom: in "park" idle hestitation, engine cut in/out, the volt meter needle up & down. No problem after shift to "drive" and normal on the road driving.
Replaced PCV valve and air filter. Same problem.
Brought the code reader, show 24 error code. ACT/IAC out of range.
1,where is the ACT/IAC on the 3.0l, my hanes manual have no pic for 3.0
2, can I use computer electronic cleaner to wash the sensor
3, is the sensor part expensive to replace by dealer?
Tom
symptom: in "park" idle hestitation, engine cut in/out, the volt meter needle up & down. No problem after shift to "drive" and normal on the road driving.
Replaced PCV valve and air filter. Same problem.
Brought the code reader, show 24 error code. ACT/IAC out of range.
1,where is the ACT/IAC on the 3.0l, my hanes manual have no pic for 3.0
2, can I use computer electronic cleaner to wash the sensor
3, is the sensor part expensive to replace by dealer?
Tom
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Joined: Apr 2001
Posts: 3,818
Likes: 3
engine code 24 : help to locate the ACT sensor
You are dealing with two separate sensors.
The ACT (air charge temperature sensor) is located on the intake plenum and resembles the water temperature sensor in looks and connector (2 wire). I doubt if this is your problem.
The IAC (idle air control valve) is the most like suspect and is a common problem in these engines. It is a cylindrical affair attached to the throttle body, again with a two wire connector. It is a simple electromagnet controlling a pintle pin, the pin in turn controlling the amount of air into the throttle body in response to engine load conditions. I.E. when idling and you activate the A/C system, the additional load imposed by the compressor causes the electronic brain to send a signal to the IAC valve to step up the idle to compensate. Under normal (no load) idle conditions the valve should be completely closed. Wear and/or deposit accumulations prevent the pin from closing the valve completely, which is why you experience the surging type of idle at rest but find it normal when in gear (under load). Just unscrew the two mounting bolts, with draw the IAC valve unit and try cleaning with a carb cleaner type solvent. The electronics cleaner won't hurt it but may not help if the gum deposits are not removed.
Expense wise, the ACT runs around $14.00 new and the IAC can run anywhere from $45 to $75 depending upon the source.
The ACT (air charge temperature sensor) is located on the intake plenum and resembles the water temperature sensor in looks and connector (2 wire). I doubt if this is your problem.
The IAC (idle air control valve) is the most like suspect and is a common problem in these engines. It is a cylindrical affair attached to the throttle body, again with a two wire connector. It is a simple electromagnet controlling a pintle pin, the pin in turn controlling the amount of air into the throttle body in response to engine load conditions. I.E. when idling and you activate the A/C system, the additional load imposed by the compressor causes the electronic brain to send a signal to the IAC valve to step up the idle to compensate. Under normal (no load) idle conditions the valve should be completely closed. Wear and/or deposit accumulations prevent the pin from closing the valve completely, which is why you experience the surging type of idle at rest but find it normal when in gear (under load). Just unscrew the two mounting bolts, with draw the IAC valve unit and try cleaning with a carb cleaner type solvent. The electronics cleaner won't hurt it but may not help if the gum deposits are not removed.
Expense wise, the ACT runs around $14.00 new and the IAC can run anywhere from $45 to $75 depending upon the source.
engine code 24 : help to locate the ACT sensor
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