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2.3L ('83-'97) Back fire


ThatOneGuy

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South sound
Vehicle Year
1983 1993
Make / Model
Ranger Explorer
Engine Type
4.0 V6
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Explorer is 4.0 ranger is 2.3 soon to be 4.0
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4WD
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235/75/15
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When I turn my truck off it will back fire once, at the catalytic converter. Do I just need to adjust fule at the carberator
 


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RonD

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canada
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1994
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I assume it only does it when engine is fully warmed up?

Yes, you could try adjusting the idler jets and re-timing spark
Has the MPG dropped lately?

Backfire(afterfire) when shutting off engine usually means it was running Rich and unburned fuel is igniting in the HOT exhaust
As a test, let engine idle for 30seconds before shutting it off and see if it afterfires, this gives the engine and exhaust a bit of time to cool off if either was over heated
 


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