2002 Ford Windstar Winstar van

OUTLAWED43

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2002 FORD WINDSTAR
3.8L
6 CYL
FWD
AUTOMATIC
200,000 MILES

Backfiring out the intake and exhaust. And number 5&6 cylinder are not firing. It has fire to the new plugs I installed. But engine rpms does not change when I pull the wire off the sparkplugs while its running. I did the same with the fuel injector wires. 1 thru 4 does change in rpms when I pull the sparkplug wires off when running. And also the injectors wires.

Monday, August 10th, 2015 AT 3:35 PM

3 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

Did you have this problem before changing the plugs?

Have you verified the firing order?

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Monday, August 10th, 2015 AT 4:36 PM

OUTLAWED43

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2 POSTS

Yes I had the problem before I changed the plugs and wires. And I did verified the firing order.

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Tuesday, August 11th, 2015 AT 3:28 PM

WRENCHTECH

MECHANIC
20,761 POSTS

Verify your spark with a spark tester first. If you have a strong spark that can jump over 1/2", then you have to start testing injector circuits with a noid light.

Do you have any codes in the computer?

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Tuesday, August 11th, 2015 AT 3:40 PM