Sick Motor

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Nov 30, 2017 | 09:56 PM

fancyvern

Thread Starter

5th Wheeling

Joined: May 2011

Posts: 37

Likes: 0

Sick Motor

I have a 2002 Ranger with a 4.0 V-6. I was driving down the road and it started to run rough. Around 2800 to 3000 rpm's it lopes and the exhaust really has a different smell. The exhaust tailpipe looks black. It has no codes. You can rev it up to about 3000 rpm's and if you floor it the rpm's stays right around 2500 to 3000 rpm's. It surges but never revs past 3500 rpm's. It idles ok. It starts ok.

Dec 1, 2017 | 07:26 AM

Hank85713

Cargo Master

Joined: Feb 2002

Posts: 2,414

Likes: 22

From: Tucson USA

when did you last change the fuel filter? Start there and move on to plugs etc.

Dec 1, 2017 | 07:49 AM

exranger06

Senior User

Joined: Nov 2013

Posts: 482

Likes: 5

If you're revving it in park or neutral, the rev limiter will not let it rev past 3,000 RPM.

Dec 1, 2017 | 08:21 AM

pawpaw

Moderator

Joined: Jan 2004

Posts: 13,851

Likes: 111

From: SW Va

Use your ELM scan tool running FORScan or the like diagnostic software, on the viewing device of your choice as discussed here https://www.ford-trucks.com/forums/1...-scantool.html, as it can scan All of the vehicle computer/controllers & post All trouble code Numbers it finds, as they can help focus a trouble shoot.