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Ford-Rangers.com Ranger Forum > Ranger Engine Tech > 4 Cylinder Gasoline > Did a smoke test, idle air cap leaking,

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Did a smoke test, idle air cap leaking,       #: 2402
 Moderated by: Mike69, MaDMaXX
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 Posted: Wed Jun 9th, 2021 12:18 am
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I did a smoke test with the smoke tester I ordered on ebay on my 98 Ranger 2.5 automatic. I went through the brake booster hose going to the manifold and I didn't see smoke coming out anywhere except the chrome cap on the idle air control valve. I didn't know if that was suppose to have air coming out of there or not. I replaced the valve in 2017 with a new Motorcraft piece. That's the only place I saw smoke coming out. Does that mean I need to swap the valve out or is that an air bleed?



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1998 Ford Ranger XLT 2.5 4R44E Automatic 4.10 non-limited slip, 1993 Ford Ranger XLT 2.3 M5 Manual, 3.45 non-limited slip
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