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Kevinh71047

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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
Since you have checked everything and are sure it’s good in the harness and the sensors, I’d grab a junkyard computer for your model year and drivetrain package. I’m not sure what else it could be.

Hey I been looking around and I am getting a egr valve got it could that be the problem
 




Centaurious

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City, State
Pensacola FL
Year, Model & Trim Level
1994 Explorer Sport
Check to see if the Fuel Pressure Regulator vacuum line is wet with fuel inside, if it is the diaphragm inside it is ruptured and you are sucking fuel into the intake.
 




Kevinh71047

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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
Ok will take a look at it. I just put new plug wires and it ran fine down the road until I stopped at a light stop sign and it acted like it wanted to dye on me. Also starting down the road but when i got full speed it ran fine
 




Kevinh71047

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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
Since you have checked everything and are sure it’s good in the harness and the sensors, I’d grab a junkyard computer for your model year and drivetrain package. I’m not sure what else it could be.

How many oxygen sensors does a 4.0 1993 EXPLORER have
 




Mbrooks420

High Voltage.
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1998 Mountaineer AWD
I would assume upstream and down stream, but could surely be wrong.
 




Kevinh71047

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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
I would assume upstream and down stream, but could surely be wrong.

Well i thought oxygen sensors were the same thing.but i just keep coming up with codes maf is low or grounded can i do this cut the one wire that aint getting good contact and ground it to the truck and see if anything else changes cause i was told thats all those wires are.
 




Joined
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Year, Model & Trim Level
1994 Ranger
Yes to the FPR diaphram leaking as being likely problem. If that is not it, look ever so closely at the plastic tube and rubber connectors on tube from MAF to throttle body. I was getting 8 to 9mpg until I found the accordion pleats were worn on bottom of plastic tube where you wouldnt notice the holes. Repaired it and highway mileage went up to 16mpg.

This is a crazy priced part if you buy new, like $150 and newest ones you find in junkyard are like 1994 so going to probably be holey too or at minimum the rubber seals are dryrotted. Cant buy seals separately. I posted a while back how I repaired mine using super glue and baking soda. Should be three pics. I also replaced one end with short length aluminum tube and a generic silicone connector between this tube and the throttle body. You can get these silicone connectors just about any configuration of sizes off ebay, though some come on slow boat from China.

The baking soda sprinkled onto super glue immediately sets it harder than anything you've seen and immediately. Bonds to plastic like nothing else. Lot videos on youtube using this method to repair otherwise impossible to repair plastics. Alternatively some have made a air tube out of pvc drain pipe and fittings. Whatever works for you. I found it was going to cause it to hit hood on my Ranger using round pipe. the OEM plastic tube is flattened into squared oval. So hood doesnt hit it. So far repairs are holding up well.
 




Kevinh71047

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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
Well my stuff is new but now what its doing now is when its running i gas on it and the engine light goes off then comes back on. My throttle body is ok but what i did is that i did a eeg test scan codes and shows only maf singal was low or grounded i tested all wires and all worked right 12 volts
 




Kevinh71047

Active Member
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Messages
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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
Yes to the FPR diaphram leaking as being likely problem. If that is not it, look ever so closely at the plastic tube and rubber connectors on tube from MAF to throttle body. I was getting 8 to 9mpg until I found the accordion pleats were worn on bottom of plastic tube where you wouldnt notice the holes. Repaired it and highway mileage went up to 16mpg.

This is a crazy priced part if you buy new, like $150 and newest ones you find in junkyard are like 1994 so going to probably be holey too or at minimum the rubber seals are dryrotted. Cant buy seals separately. I posted a while back how I repaired mine using super glue and baking soda. Should be three pics. I also replaced one end with short length aluminum tube and a generic silicone connector between this tube and the throttle body. You can get these silicone connectors just about any configuration of sizes off ebay, though some come on slow boat from China.

The baking soda sprinkled onto super glue immediately sets it harder than anything you've seen and immediately. Bonds to plastic like nothing else. Lot videos on youtube using this method to repair otherwise impossible to repair plastics. Alternatively some have made a air tube out of pvc drain pipe and fittings. Whatever works for you. I found it was going to cause it to hit hood on my Ranger using round pipe. the OEM plastic tube is flattened into squared oval. So hood doesnt hit it. So far repairs are holding up well.
Well on the tube my sides are broke that hook up to the maf and intake but have lots of black tape around it tho never thought of looking at the bottom will check that out and see thanks
 




Centaurious

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City, State
Pensacola FL
Year, Model & Trim Level
1994 Explorer Sport
If you have a leak between the MAF and the throttle body it will cause a low MAF reading. Air leaking in means less air through the filter and MAF and a lower reading. You will get the same effect if the hose from the intake tube to the valve cover is leaking or bad.
 




Kevinh71047

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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
Yeah i was thinking about that too cause it is dry rotted and one of the ends to the throttle body hole is bent over but sometimes when i crank it up it does the cel and sometimes it takes a few minutes to light up.
 




Kevinh71047

Active Member
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Messages
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City, State
Tenaha texas
Year, Model & Trim Level
1993 EXPLORER eddie Bauer
If you have a leak between the MAF and the throttle body it will cause a low MAF reading. Air leaking in means less air through the filter and MAF and a lower reading. You will get the same effect if the hose from the intake tube to the valve cover is leaking or bad.

Also will that trigger the code maf is low or grounded.
 












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