Question?
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Junior User
Joined: Sep 2017
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From: The "sunshine" state
Question?
I got a 1995 ford f-350 with a 351W, runs rough when in drive or reverse it spits and sputters then dies. I replaced the throttle position sensor, mass air flow sensor, and the engine coolant temperature sensor it also idles a little high, what could it be?
Cargo Master
Joined: Mar 2010
Posts: 3,330
Likes: 292
From: Laramie, WY
You have a '95 5.8L F350 with MAF? Is it obdi or obdii (possibly California emissions?)?
Start with the basics:
0. Check codes first.
1. Have you done basic maintenance? Plugs, cap, rotor, fuel and air filters, PCV valve, clean MAF.
2. What is the fuel pressure: with vacuum to the regulator, without vacuum to the regulator, and most importantly what is the pressure when it is stumbling?
3. What is engine vacuum at idle? The high idle may indicate a vacuum leak.
Why did you replace the parts you replaced already? Throwing parts at a truck without diagnosing is a good way to introduce more variables to the problem you're trying to solve.. new doesn't always mean good.
Start with the basics:
0. Check codes first.
1. Have you done basic maintenance? Plugs, cap, rotor, fuel and air filters, PCV valve, clean MAF.
2. What is the fuel pressure: with vacuum to the regulator, without vacuum to the regulator, and most importantly what is the pressure when it is stumbling?
3. What is engine vacuum at idle? The high idle may indicate a vacuum leak.
Why did you replace the parts you replaced already? Throwing parts at a truck without diagnosing is a good way to introduce more variables to the problem you're trying to solve.. new doesn't always mean good.
Thread Starter
|
Junior User
Joined: Sep 2017
Posts: 64
Likes: 0
From: The "sunshine" state
You have a '95 5.8L F350 with MAF? Is it obdi or obdii (possibly California emissions?)?
Start with the basics:
0. Check codes first.
1. Have you done basic maintenance? Plugs, cap, rotor, fuel and air filters, PCV valve, clean MAF.
2. What is the fuel pressure: with vacuum to the regulator, without vacuum to the regulator, and most importantly what is the pressure when it is stumbling?
3. What is the engine vacuum at idle? The high idle may indicate a vacuum leak.
Why did you replace the parts you replaced already? Throwing parts at a truck without diagnosing is a good way to introduce more variables to the problem you're trying to solve.. new doesn't always mean good.
Start with the basics:
0. Check codes first.
1. Have you done basic maintenance? Plugs, cap, rotor, fuel and air filters, PCV valve, clean MAF.
2. What is the fuel pressure: with vacuum to the regulator, without vacuum to the regulator, and most importantly what is the pressure when it is stumbling?
3. What is the engine vacuum at idle? The high idle may indicate a vacuum leak.
Why did you replace the parts you replaced already? Throwing parts at a truck without diagnosing is a good way to introduce more variables to the problem you're trying to solve.. new doesn't always mean good.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Thread Starter
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Junior User
Joined: Sep 2017
Posts: 64
Likes: 0
From: The "sunshine" state
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
OK, can you post some pics of your engine bay and the wiring connector or connectors at the PCM. To get MAF into a '92 there would have to be an overlay harness which would mean 2 nested connectors at the PCM, does your truck have that?
Are there any codes right now?
Do you know the catch code for the PCM?
Are there any codes right now?
Do you know the catch code for the PCM?
Cargo Master
Joined: Mar 2010
Posts: 3,330
Likes: 292
From: Laramie, WY
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Thread Starter
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Junior User
Joined: Sep 2017
Posts: 64
Likes: 0
From: The "sunshine" state
OK, can you post some pics of your engine bay and the wiring connector or connectors at the PCM. To get MAF into a '92 there would have to be an overlay harness which would mean 2 nested connectors at the PCM, does your truck have that?
Are there any codes right now?
Do you know the catch code for the PCM?
Are there any codes right now?
Do you know the catch code for the PCM?
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Thread Starter
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Junior User
Joined: Sep 2017
Posts: 64
Likes: 0
From: The "sunshine" state
no, the truck has not run properly since the modification
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
OK I don't see a piggyback connector there so maybe the additional wiring is hardwired in. Are you still getting codes for things that have been replaced? If so post up the code numbers.
Thread Starter
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Junior User
Joined: Sep 2017
Posts: 64
Likes: 0
From: The "sunshine" state
KOEO Test: 126,556,637
KOER Test: 998,126
I know 126 is MAP sensor but the wire harness doesn't have the electrical plug for it, it only has the plug for the MAF
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
So it appears you somehow got a MAF wiring harness and an SD PCM, can you remove the PCM and post up the catch code or some pics of it to verify, there should be a label on it with some numbers.
Thread Starter
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Junior User
Joined: Sep 2017
Posts: 64
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From: The "sunshine" state
