• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Seriously confused by 94 Explorer

84bluebronco2

New Member
Joined
Dec 7, 2009
Messages
754
Reaction score
13
Points
0
Location
Central New York
Vehicle Year
94
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
Well a couple months back i posted about a shuddering problem my truck was having. A lot of people jumped and said it was clutch, but it ended up the clutch is just dandy :D Since then the truck has gotten new plugs, wires, coil pack, intake boot, thermostat, fuel filter, and had the intake and EGR cleaned out pretty well.

Same problem as before still exists. When the plugs were changed, the three on I believe the driver's side were nasty, three on the passenger side were relatively good. Truck is also running on the rich side of the spectrum... :icon_confused:

The odd bits:
Why foul three plugs on one bank, but not the other?
Why when the MAF is unplugged it doesn't change results?
Why when the EGR is opened at idle does my truck rev up? :icon_confused:

I will have to check into the MAF I know, but any other ideas? It's been three months and I'm bummin with out my ride... :bawling:
 


Boggin

New Member
Joined
Nov 3, 2007
Messages
5,711
Reaction score
48
Points
0
Transmission
Manual
84bluebronco2;958844 Why when the MAF is unplugged it doesn't change results?[/QUOTE said:
sounds to me like you need a maf
 

gribly

Well-Known Member
U.S. Military - Veteran
Joined
May 1, 2010
Messages
1,195
Reaction score
28
Points
48
Location
Maine
Vehicle Year
2002
Make / Model
Honda
Engine Size
K20A3
Transmission
Manual
Before replacing the MAF, clean it up with the MAF cleaner that comes in a spray can. Also, check the connections, it might be corroded or missing part of it or something.
 

84bluebronco2

New Member
Joined
Dec 7, 2009
Messages
754
Reaction score
13
Points
0
Location
Central New York
Vehicle Year
94
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
So you can spray cleaner on the MAF without damaging it?
 

Irokranger93

New Member
Joined
Mar 18, 2010
Messages
454
Reaction score
0
Points
0
Location
Michigan
Vehicle Year
2011
Make / Model
Ford
Engine Size
3.0L
Transmission
Manual
YEAH , and even just the compressed air with rubbing alcohol
 

84bluebronco2

New Member
Joined
Dec 7, 2009
Messages
754
Reaction score
13
Points
0
Location
Central New York
Vehicle Year
94
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
Another thought, with a bad MAF, what are the chances of all bank 1 plugs being fouled, but no bank 2? And compression test showed 160,160,160,160,160,165
 

Earl43P

Well-Known Member
U.S. Military - Veteran
Joined
Aug 7, 2007
Messages
3,159
Reaction score
37
Points
48
Location
Stafford, Va
Vehicle Year
2019
Make / Model
Ford F250 4WD
Engine Size
3.0
Transmission
Manual
If one bank is running rich, I'd replace that side O2 sensor.

Can't be the MAF, that would affect both banks equally.
 

BLOODBANE

Active Member
V8 Engine Swap
TRS Banner 2010-2011
Joined
Aug 7, 2007
Messages
1,119
Reaction score
18
Points
38
Location
Canon City, CO
Vehicle Year
19841994
Make / Model
FORDFORD
Engine Size
347, 4.oh
Transmission
Automatic
What kind of codes are you getting? My 94 gave me some fits a couple of years ago and no matter what I did it kept it up. I would get various codes(different each time I would scan it). It ended up being the ECM. I replaced that and no more problems. Hopefully not what your looking at, but maybe a direction to look in.
 

84bluebronco2

New Member
Joined
Dec 7, 2009
Messages
754
Reaction score
13
Points
0
Location
Central New York
Vehicle Year
94
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
I've been leaning towards ECM. If it is I will have to hope the pick a part yards around here have a salvageable one. If you pick one, what is there to look out for? Does it have to be matched up to a specific 4.0?
 

CountryBoy78

New Member
U.S. Military - Veteran
Joined
Nov 1, 2009
Messages
164
Reaction score
1
Points
0
Location
Rice Lake,WI
Vehicle Year
1994
Make / Model
Ford
Engine Size
4.0L
Transmission
Automatic
I've been leaning towards ECM. If it is I will have to hope the pick a part yards around here have a salvageable one. If you pick one, what is there to look out for? Does it have to be matched up to a specific 4.0?
Yeah I had to replace mine a few years ago.
On the ECM there should be a label on it with a code and numbers. You have to match that code from a junkyard one. My 94' Explorer had two different ones that came from factory and go figure the one that was in mine was one that was hard for the junkyard to find .........but within a week they found one out west :icon_thumby:
 

84bluebronco2

New Member
Joined
Dec 7, 2009
Messages
754
Reaction score
13
Points
0
Location
Central New York
Vehicle Year
94
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
Sorry for the late response, but work said no internet for you. My mechanic seems to believe it is a fuel injector going bad, causing the odd pulse width, and therefore causing the rough running and fouling. Plausibility?
 

84bluebronco2

New Member
Joined
Dec 7, 2009
Messages
754
Reaction score
13
Points
0
Location
Central New York
Vehicle Year
94
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
I'm going to throw that one at my mechanic Monday! Is it possible to have that problem with no lost oil? This truck hasn't dropped a spot of oil in 3000+ miles.
 

rush2252

New Member
Joined
Mar 12, 2011
Messages
10
Reaction score
0
Points
0
Vehicle Year
2002
Make / Model
Ford
Transmission
Automatic
I give it a +1 on a leaky intake. A leaky intake doesnt always mean oil consumption either. Sometimes but not always it will cause a very lean condition but Ive seen it be reversed. Ford and their plastic intakes. smh
 

Sponsored Ad


Sponsored Ad

Top