94' backfiring upon acceleration | Ford Explorer - Ford Ranger Forums - Serious Explorations
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94' backfiring upon acceleration

lwillits

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Joined
April 24, 2005
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City, State
colorado springs, CO
Year, Model & Trim Level
94 eddie bauer
My 94 EB 4x4 was running fine but it was time for a Tune up (114500). I went to AutoZone.com (living in England right now) and ordered new motorcraft plugs and wires, air filter, fuel filter and pcv valve. Installed all but the plugs, cause they sent me the wrong ones. I Reinstalled the old plugs with the new wires. Started it up and it ran, but with a Miss. Took it for a test drive and it backfires when ever i give it acceleration. It is coming from the engine not the exhaust.

Triple checked the wire placement. - nothing

put the old wires back on - runs a bit better, fine at idle and low speeds backfires on acceleration

Checked for vacuum leaks and replaced 2 vacuum hoses, still no improvement.

Going to clean the MAF tomorrow, prob. gonna reorder new spark plugs tomorrow too.
What am i doing wrong...? Anyhelp would be greatly appreciated.
CHEERS MATE.. :D
 






trollkepr

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Joined
June 27, 2005
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City, State
OKC, OK
Year, Model & Trim Level
92 2X4
You are right calling it back firing. When it goes out the exhaust it is technically called after firing. hehehe

Now your problem. I would betcha that you have a crossed wire. It can be easy to overlook. Go with the beliefe that there is something wrong with the wiring and keep searching. I bet you will find it.
 






urbanistic

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July 25, 2004
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Seattle, Washington
Year, Model & Trim Level
2000 XLT 5.0
Sounds to me like a wire mix-up.
 






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