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2.5L ('98-'01) P0442 rough idle and stalling. Everything checks out.


ben_2_go

Well-Known Member
Joined
Aug 24, 2007
Messages
343
Reaction score
381
Points
63
Location
Third rock from sun
Vehicle Year
2001
Make / Model
Furd
Engine Type
2.5 (4 Cylinder)
Engine Size
2.5 Scrap
Transmission
Automatic
2WD / 4WD
2WD
Tire Size
235-75-R15
My credo
None at all.
SOLVED!

I replaced the entire ignition systems again, coils, spark plugs, wires. I replaced the IAC and went back to the OE after a good cleaning with cotton swabs and contact cleaner. Replaced two MAF sensors, before replacing the entire thing. Bingo! We have a steady, altho some what fluctuating idle, and no spark knock. I'm still down on power but I believe that's is still to do with a partially plugged catalytic converter. I will be doing a full exhaust sometime this year. I've since bought a GMC C5500 and that is getting my attention now.
 


-Nate

Active Member
Ford Technician
Joined
Mar 10, 2020
Messages
121
Reaction score
57
Points
28
Age
121
Location
Sunny So. Cal. Land Of The Weird
Vehicle Year
2001
Make / Model
Ford Ranger XL
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
Total Lift
0
Total Drop
0
My credo
Nothing is so difficult it cannot be overcome by brute force and ignorance =8-)
I dislike having to shogun parts to solve a problem .

My CEL came on last week, I'll have to see if my scanner works .
 

ben_2_go

Well-Known Member
Joined
Aug 24, 2007
Messages
343
Reaction score
381
Points
63
Location
Third rock from sun
Vehicle Year
2001
Make / Model
Furd
Engine Type
2.5 (4 Cylinder)
Engine Size
2.5 Scrap
Transmission
Automatic
2WD / 4WD
2WD
Tire Size
235-75-R15
My credo
None at all.
I dislike having to shogun parts to solve a problem .

My CEL came on last week, I'll have to see if my scanner works .
If you read back through my thread, you'll see I fixed the codes, but still had a spark knock issue and no codes. I bought a scan tool that could read sensor data and it still showed nothing wrong. Evey thing was in spec when I researched it. The MAF readings were a little off but still close enough to not throw a code.
 

-Nate

Active Member
Ford Technician
Joined
Mar 10, 2020
Messages
121
Reaction score
57
Points
28
Age
121
Location
Sunny So. Cal. Land Of The Weird
Vehicle Year
2001
Make / Model
Ford Ranger XL
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
Total Lift
0
Total Drop
0
My credo
Nothing is so difficult it cannot be overcome by brute force and ignorance =8-)
Oh, yes, i did read .

I have a borrowed code reader and plan to use it as soon as I get the time .

My truck just flew through the emissions test so I'm betting the E.G.R. valve is dirty and I also want to replace the N02 sensor as Ford says they age out .
 

ben_2_go

Well-Known Member
Joined
Aug 24, 2007
Messages
343
Reaction score
381
Points
63
Location
Third rock from sun
Vehicle Year
2001
Make / Model
Furd
Engine Type
2.5 (4 Cylinder)
Engine Size
2.5 Scrap
Transmission
Automatic
2WD / 4WD
2WD
Tire Size
235-75-R15
My credo
None at all.
Oh, yes, i did read .

I have a borrowed code reader and plan to use it as soon as I get the time .

My truck just flew through the emissions test so I'm betting the E.G.R. valve is dirty and I also want to replace the N02 sensor as Ford says they age out .
You're on top it. You'll get'er figgered out.
 

-Nate

Active Member
Ford Technician
Joined
Mar 10, 2020
Messages
121
Reaction score
57
Points
28
Age
121
Location
Sunny So. Cal. Land Of The Weird
Vehicle Year
2001
Make / Model
Ford Ranger XL
Engine Type
2.5 (4 Cylinder)
Transmission
Manual
2WD / 4WD
2WD
Total Lift
0
Total Drop
0
My credo
Nothing is so difficult it cannot be overcome by brute force and ignorance =8-)
Thanx, I hope so .

The deal is this : I'm a Geezer and can easily fix older things but computers are a first water mystery to me .

My friend loaned (perhaps gave) me a code reader, now I have to teach my self how to use it and look at all the different pages of information it can show .

I watched a guy rapidly flick through this on my truck but he's a cranky kid (my 48 Y.O. Son :rolleyes:) who thinks taking the time to teach me as I did for him when he was coming up, is too much bother .

We'll see, 99% of the time I just go over the basics and everything works out .

At 20 years old no one wants to touch it and it's pristine, only 140,000 miles, the Mid West and Salt Belt guys all want to buy it, no rust, never crashed, blah blah blah .

I'm an old man now and hope this will be my last truck .
 

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