Quote:
Originally Posted by modelageek
He does not have a MAP Sensor.
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First thing to do with a rough idle is to clean the IACV.
The 2.3's have a pcv valve that needs to be replaced as maintenance. You need to remove the front left tire to get to it.
The other issue on some 2.3's is the nickel size plug on the intake that can loosen up. Usually throws a lean code.
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Odd...
I never saw a PCV valve on the side of th eengine. Mine is on top right in front.
Edit:
Additional.
I cleaned my MAF again. I also sprayed MAF cleaner into the TB and tried to clean some of that out too.
I looked in and it looked AWFUL inside.
I am afraid to try to clean too much for fear of a backfire when restarting and causing the intake to explode.
I will have to check that MAP sensor!
I hope and PRAY that is all it needs is a simple cleaning. Otherwise it is off to the dealer and sell a kidney on ebay to pay for diagnostics and repairs.
I notices that the water vapor from my tailpipe 'peters out' and not a good flow not much vapor at all.
Perhaps a clog somewhere? Or just extremely lean?
I have no codes and that is the aggravating thing.
Ever shop I take it too pulgs in a 'box' and scans the computer. No problems found (of course). Apparently none of the young mechanics bother to learn how to aggressively determine a problem.
The computer is like a go-no go gauge. Either it gives a code or it don't. And just because you don't get a code doesn't mean that nothing is wrong.
Too lean a condition and you can burn valves. Too rich and you wash oil from the cylinders and ruin your rings.
Ford really needs to fix their fuel mapping for more real life situations.
It would be nice if those boxes could pull actual information out like actual map sensor readings and O2 readings and MAF readings.
Apparently they don't or the mechanics would have seen the problem.
Say you had a clogged MAP sensor. Opening and closing the TB should make it jump up and down drastically. And the O2 sensor should follow in short order.
A bad MAF sensor - the range of operation is too wide. Being on the edge of the parameters is bad. Not enough to trip a code and yet bad enough to give you fits.
Here is a good write up about the issue:
http://www.ehow.com/list_7453934_sym...p-sensor_.html