need help
Thread Starter
Junior Member
Joined: Jan 2011
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need help
i have a 1999 Ford F150 with the 4.2l v6 and a manual trans. it has about 150000 miles on it and the engine it running lean/rich in cylinders 1 and 2 and i need to know what i need to fix it please call 940 483 9189 ask for Chris
Senior Member
Joined: Oct 2010
Posts: 859
Likes: 12
From: Wyoming
If it's lean I'm guessing the fuel injectors. Run some fuel injector cleaner and it should get rid of carbon buildup that could be blocking the injectors. If that doesn't work then it's just simply faulty injectors.
Senior Member
Joined: Jan 2010
Posts: 1,559
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From: virginia
^DOUBTFUL. Is it just running lean on cylinder 1 and 2 or is it banks 1 and 2. I'm guessing bank 1 and 2 and if so it could be several things. You can start by cleaning the MAF sensor. Next check the PCV valve. It could also be caused by a vacumn leak. Do a search and you will find a ton of information on this.
Senior Member
Joined: Oct 2010
Posts: 859
Likes: 12
From: Wyoming
^DOUBTFUL. Is it just running lean on cylinder 1 and 2 or is it banks 1 and 2. I'm guessing bank 1 and 2 and if so it could be several things. You can start by cleaning the MAF sensor. Next check the PCV valve. It could also be caused by a vacumn leak. Do a search and you will find a ton of information on this.
