Stutters while driving & dies at idle

JERRY.R.STARNES

MEMBER
2000 FORD ESCORT
4 CYL
FWD
MANUAL
120,000 MILES

2000 ford escort zx2: driving one day car running perfect and all of a sudden it starts to sputter very bad and dies. It will start up and run as long as I keep my foot on the accelerator, but it is still sputtering and will dies as soon as I let off. And my MPG's went from 25mpg to like 10mpg. I have tried replacing the fuel pump and strainer and the fuel filter and still no change. Please help this is my only vehicle! Ossibly the (MAF) Mass Air Flow sensor?

2 Replies

CJ MEDEVAC

MECHANIC
11,004 POSTS

Maybe this?

Very EZ to remove and clean

https://www.2carpros.com/questions/2005-ford-escape-rough-idle-at-low-rpm

The Medic

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Wednesday, June 15th, 2011 AT 1:50 PM

JERRY.R.STARNES

MEMBER
2 POSTS

Ok here is an update on what I have tried. I purchased a code reader and it shown the following codes:
P0304 - Cylinder 4 misfire
p0340 - Camshaft Position Sensor A - Bank 1 Ciruit Malfunction
P1131 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1

This means nothing to me because I have no clue what it means.
I have replaced the spark plugs & wires and can see that all plugs are firing fine. What would cause these codes and how can I check. I will be conducting a wet/dry compression test tonight to try and hopefully rule out a faulty Valve or rings.
Any info would be helpful, thank you.