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I don't know how far down you went when replacing the MAF - but did you possibly leave one of these pipes off the intake tube when you put it back together? (See red arrows on right).
I will check the PCV valve and hose when I get home. Also I cannot hear a vacuum leak and yes I do have oil cap on and dip stick is fine. What is meant by o-ring? I replaced MAF sensor with the whole housing. Shouldn't that be fine?
I don't know how far down you went when replacing the MAF - but did you possibly leave one of these pipes off the intake tube when you put it back together? (See red arrows on right).
I’ve left one of those breather hoses unplugged before. 😬
I will check the PCV valve and hose when I get home. Also I cannot hear a vacuum leak and yes I do have oil cap on and dip stick is fine. What is meant by o-ring? I replaced MAF sensor with the whole housing. Shouldn't that be fine?
If you say so. It's a little 7/16 o-ring MAF posts.
How about this, - IF your warm idle is above 750 rpms in park, in most cases you have a un-metered air leak. The gen 10's idle is pretty solid and smooth in these trucks, -usually being dead nuts at 730 rpms. When everything is tight anyway.
Ford has it, - from 700-750 warm idle rpms in park, = Good
But over the years, they have proven to rest right at 730 rpms....or VERY close to it.
An easy way to tell when there's a problem is your warm idle rpms.
If you say so. It's a little 7/16 o-ring MAF posts.
How about this, - IF your warm idle is above 750 rpms in park, in most cases you have a un-metered air leak. The gen 10's idle is pretty solid and smooth in these trucks, -usually being dead nuts at 730 rpms. When everything is tight anyway.
Ford has it, - from 700-750 warm idle rpms in park, = Good
But over the years, they have proven to rest right at 730 rpms....or VERY close to it.
An easy way to tell when there's a problem is your warm idle rpms.
Jbrew I must have un-metered air leak. idle rpm at warm is about 778-790 it used to be around 730 no more than 750. This weekend I am going to really search for a vacuum leak. However, I have to drive it this week to get to work. I hope it does not mess anything up.
Search for it using a soapy water mixture and watch for bubbles (and listen for a slight whistle). Some guys like looking for vacuum leaks with propane, but that's a little more "livin'-on-the-edge" than I like. Carb cleaner is no bueno for these hoses and wires.
02-20-2018, 12:15 PM
