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2002 Ford Windstar Winstar van

Tiny
OUTLAWED43
  • MEMBER
  • 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.
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Monday, August 10th, 2015 AT 3:35 PM

3 Replies

Tiny
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
Tiny
OUTLAWED43
  • MEMBER
  • 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
Tiny
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

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