1983 - 2012 Ranger & B-Series All Ford Ranger and Mazda B-Series models

Ford 1999 4.0 Missing

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Aug 18, 2007 | 05:13 PM

#1

todd daniel

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Ford 1999 4.0 Missing

Hello all and thank you in advance for your information. I have a 1999 Ford Ranger with a 4.0L v6 with a bad miss. The symptoms are as follows acording to my autoengenuity scanner. Bank one long term mixture lean 17% to 25%, Missfire on #1 and an abnormal lean o2 sensor output. Is this a symptom of a bad injector? I have replaced plugs and wires, fuel filter, bank one o2 sensor. AT WOT. bank one 02 sensor gets to .6v to .7x and bank two holds at .8v.

TD

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Aug 18, 2007 | 11:13 PM

#2

todd daniel

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Aug 19, 2007 | 07:51 AM

#3

Rockledge

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From: Connecticut

It doesn't sound ignition-related. Have you checked the fuel pressure?

P.S. Welcome to FTE.

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Aug 19, 2007 | 10:03 AM

#4

wendell borror

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Whats it missing besides 47 hp that you can get from a 4.0 sohc ha ha. Like Rockledge, I believe it sounds more fuel related.

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