Rough engine idle, coolant loss, stalling
Hey guys,
I have a couple problems with my 97 ranger 4.0, and i'd like to get a little FRF expertise if i could on what it could be.
First off, my truck's CEL is on, and the codes are P0171 and P0174, lean on both bank 1 and 2. Now, i'm aware that this could be caused by a number of things, such as vacuum leak, dirty MAF, etc.
Secondly, my engine idle is all over the place... as soon as I start the truck, it revs up and down, up and down.... and does this for awhile until it evens out a bit, then does it again.
Thirdly, I have a small coolant leak which I have taken a good look at and I believe it to be coming from the Upper intake manifold. I have reason to believe the gasket needs to be replaced as I've read online that the 97 rangers had problems with the upper intake actually sucking in the gasket and causing coolant loss along with the CEL codes i said earlier.
Also, when I brake and come to a complete stop, my car sometimes just stalls out and I have to put it in park and start it back up again. I need to get this fixed asap, as it can be very dangerous.
Anyone think the stalling issue is caused by a vacuum leak? And also, should I go ahead and replace the gasket, or replace hoses and a couple of sensors first?
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1997 Ford Ranger 4.0 ext cab
Last edited by Vheissu; 01-30-2012 at 12:07 PM.
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