IAC Valve Connection Issues...
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IAC Valve Connection Issues...
So my '86 Bronco II (2.9L) was cranking but not starting. Checked for spark, found coil to by faulty, replaced coil, still nothing. Then while jiggling around with the IAC valve electrical connector, I figured out that we could get it started if we held the plug on there really good.
So just to be safe I replaced the IAC valve itself. The replacement I got looked almost identical except for the two holes on the valve. They were not the same size holes, and the holes on the old IAC valve were the same size. Not sure if that matters but I figured I'd include it.
So I replaced the valve and got it started, but it died after running for about 5 seconds. I continued to try to get it going, still nothing.
I ran the same test on the coil and sure enough, the resistance was 0, and it is supposed to be between .3 and 1.0. And I am not getting a spark.
I am about at my wits' ends. It's a brand new coil...what about the IAC Valve could possibly be causing my coil to malfunction?
Any insight would be greatly appreciated! Thank you for your time.
Morgan
So just to be safe I replaced the IAC valve itself. The replacement I got looked almost identical except for the two holes on the valve. They were not the same size holes, and the holes on the old IAC valve were the same size. Not sure if that matters but I figured I'd include it.
So I replaced the valve and got it started, but it died after running for about 5 seconds. I continued to try to get it going, still nothing.
I ran the same test on the coil and sure enough, the resistance was 0, and it is supposed to be between .3 and 1.0. And I am not getting a spark.
I am about at my wits' ends. It's a brand new coil...what about the IAC Valve could possibly be causing my coil to malfunction?
Any insight would be greatly appreciated! Thank you for your time.
Morgan
More Turbo
Joined: Jan 2000
Posts: 507
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From: Pasadena US
I don't believe the coil is bad. The coil is just a transformer. It steps up voltage that is sent to it in the primary circuit. Then the magnetic field is created. Then the field needs to collapse, which is done in the distributor or crank sensor etc, depending on the engine. The coil probably is not the problem. If the current isn't switched on and off, the coil can't do anything.
If you have the range wrong on your multimeter, it could show zero, even though there is some small amount.
If you have the range wrong on your multimeter, it could show zero, even though there is some small amount.
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More Turbo
Joined: Jan 2000
Posts: 507
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From: Pasadena US
Well the TFI is very common to go on Ford products. It is responsible for the primary ignition triggering.
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