lean code for banks 1 & 2? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 12-13-2009
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lean code for banks 1 & 2?

my check engine light came on, i checked the code and cleared to see if it would come right back on. two days later it did. im wondering what could be causing this? a friend sugested it could be something going bad in that plastic intake or oxygen sensors. its been running fine it seems like, i still drive it everyday and havent had any issues. any help is appriciated.
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Old 12-13-2009
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its a vac leak. theres a upper hose right next to the throttle body that cracks. ill see if i can find a link,.
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Old 12-13-2009
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Old 12-13-2009
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he has a ohv motor dude that want help him.. get some carb cleaner and spray around the intake with the motor runing see if the idel changes if so then theirs your leak. also clean your maf it will also set off this code
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Old 12-13-2009
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i have the ohv so would it be the same?
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Old 12-13-2009
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Quote:
Originally Posted by Redrocket View Post
he has a ohv motor dude that want help him.. get some carb cleaner and spray around the intake with the motor runing see if the idel changes if so then theirs your leak. also clean your maf it will also set off this code
thanks brandon. ill try it tomorrow.
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Old 12-13-2009
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Intake manifold gaskets are VERY common problems. However, any leak in the intake system could cause this, there are a ton of threads here on it. If you search the codes you will find a lot of suggestions on where to look.
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Old 12-14-2009
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this same thing happens to me, but only when it gets cold out, its weird as hell
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Old 12-14-2009
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Check your freeze frame data and look at the fuel trims. I can pinpoint exactly what the problem is just from this 99 out of 100 times. I made a post about how to troubleshoot this but the Mods around here never stickied it!
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Old 12-14-2009
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Quote:
Originally Posted by VW TANK View Post
this same thing happens to me, but only when it gets cold out, its weird as hell
yeah same here its only a problem in the winter
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Old 12-14-2009
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Quote:
Originally Posted by OVERtheEDGE View Post
yeah same here its only a problem in the winter
My wife's old 97 Explorer had this problem, only when it was colder. It ran rough when it was cold out, until it warmed up. Turned out to be the upper intake manifold gaskets. When they were cold (and brittle) they didn't seal up right. Once they warmed up, they expanded a little bit and sealed up, ran fine.
I took a risk buy only buying the upper gaskets and replacing them fixed it. Sometimes it is the lower gaskets though as well.
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Old 12-15-2009
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i had a sneaking suspicion this might be it, ive just been putting it off

i just ordered the fel-pro kit for upper, lower, and valve cover
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Old 12-15-2009
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i could care less as long as it runs and doesnt mess anything up. its getting rebuilt anyway
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Old 12-27-2009
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well i cleaned the MAF, sprayed starting fluid all over the intake and vacume lines. and still have the check engine light. im thinking its a sensor? o2 maybe?
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Old 12-28-2009
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I had same problem but mine disappeared when i took off the K and N air filter system....
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Old 12-29-2009
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A bad seal on my oil cap tripped the same codes.
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