Diesel Engine Stumble
Thread Starter
|
Senior User
Joined: May 2006
Posts: 222
Likes: 0
From: Edmonton, AB
Diesel Engine Stumble
Hi:
I'm at my buddy's shop right now and he's having problems troubleshooting a problem with his 2001 F250 XLT truck. The truck is a diesel, with a 6 speed standard and air conditioning. 176,000 mi on the clock.
His issue is this: The truck has an intermittent stumbe (sometimes stall). It's very random. Sometimes the check engine light will come on, sometime it wont. We've attached a snap-on scanner, and it shows no codes at all.
We spoke with Ford and we were told to check for some sort of loose bolt on the back of the fuel filter assembly. It's tight, with no leakage.
Just some more info... we've been enjoying a week of -14F temperatures. Don't know if this is contributing or not.
Any ideas? Neither one of us are diesel savvy either... might be part of the problem
I'm at my buddy's shop right now and he's having problems troubleshooting a problem with his 2001 F250 XLT truck. The truck is a diesel, with a 6 speed standard and air conditioning. 176,000 mi on the clock.
His issue is this: The truck has an intermittent stumbe (sometimes stall). It's very random. Sometimes the check engine light will come on, sometime it wont. We've attached a snap-on scanner, and it shows no codes at all.
We spoke with Ford and we were told to check for some sort of loose bolt on the back of the fuel filter assembly. It's tight, with no leakage.
Just some more info... we've been enjoying a week of -14F temperatures. Don't know if this is contributing or not.
Any ideas? Neither one of us are diesel savvy either... might be part of the problem
Thread Starter
|
Senior User
Joined: May 2006
Posts: 222
Likes: 0
From: Edmonton, AB
Originally Posted by SUPERDUTY_untouchabl
Does it just do this when u start it up or just randomly while it is already starting.
Do you plug it up at night or when its not running?
Do you plug it up at night or when its not running?
The truck only has the problem then it's already running, never on startup.
Also, we're using anti-gel chemicals in the fuel as well.
Also, just to let you know, the day the truck was really acting up it was -32F that day
But, he also tells me that the truck was also doing this month or so ago when it temperatures were in the low 40s
He also notices that often, but not always, the truck will stumble when you turn the wipers on of all crazy things.
He's threataning to buy a Chevy, but now realizes that that would just never run at all...lol
Last edited by sconut1; Nov 29, 2006 at 09:13 PM. Reason: More information
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
Thread Starter
|
Senior User
Joined: May 2006
Posts: 222
Likes: 0
From: Edmonton, AB
What is a CPS and where is located?
And one more question...diesel newbie that I am, is there such a thing as an IAC on a diesel?
And one more question...diesel newbie that I am, is there such a thing as an IAC on a diesel?
Trending Topics
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
What are you refering to on the IAC? we have an AIC - Aux Idle Control (High Idle)
http://guzzle.rbmicro.com/cps.html
http://guzzle.rbmicro.com/cps.html
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Senior User
Joined: May 2006
Posts: 222
Likes: 0
From: Edmonton, AB
Idle Air Control solenoid. I'm probobly out in left field.
Maybe another question too. If the CPS was bad, will you always get a code, never get a code or sometimes get a code when we read the codes with a scanner.
Maybe another question too. If the CPS was bad, will you always get a code, never get a code or sometimes get a code when we read the codes with a scanner.
Senior User
Joined: Sep 2005
Posts: 257
Likes: 1
From: Grafton , WV
It might be the CPS going south, my truck has done this once in a while, just driving along, pull up at a stop light and Blagh, dead. Fires right back up though. I would at least get a spare to put in the glove box, just in case. I haven't changed mine yet but I am prepared. Also I don't think you get any code, I haven't seen one on mine, and from what I have read on here I don't think you get one. It has been said on here that to watch the RPM Gauge to see if there is any movement when you crank it, If not then it is a sign that the CPS is going bad, my gauge has never moved during cranking since I learned about it over a year ago, so I don't know. Just my .02.
Last edited by 670johndeere; Nov 29, 2006 at 10:21 PM.
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
No on the IAC
Sometimes the CPS will set codes P0340, P0341, P0344 and sometimes not. It has to occur a certain number of time in a single drive cycle to set a code so when they are intermittant the code is not always set.
Sometimes the CPS will set codes P0340, P0341, P0344 and sometimes not. It has to occur a certain number of time in a single drive cycle to set a code so when they are intermittant the code is not always set.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by sconut1
Idle Air Control solenoid. I'm probobly out in left field.
Maybe another question too. If the CPS was bad, will you always get a code, never get a code or sometimes get a code when we read the codes with a scanner.
Maybe another question too. If the CPS was bad, will you always get a code, never get a code or sometimes get a code when we read the codes with a scanner.
Thread Starter
|
Senior User
Joined: May 2006
Posts: 222
Likes: 0
From: Edmonton, AB
Well gents, the symptoms you are describing certainly sound like we need to have a look at the CPS sensor. We're trying to get the truck to stumble with the scanner on it to see if we get any codes, but who knows if it will act up. It's in a nice warm shop now.
Anyway, since everyone seems to agree that we might not get a code, I'm going to tell my buddy that he should probobly take a look at the CPS sensor. Clean the contact and check for work or frayed wiring to the sensor.
If all looks, good, should I tell him to buy one and try it? I know it sucks buying parts just on a whim, but what you guys are saying sure seems to be what the issue is
Anyway, since everyone seems to agree that we might not get a code, I'm going to tell my buddy that he should probobly take a look at the CPS sensor. Clean the contact and check for work or frayed wiring to the sensor.
If all looks, good, should I tell him to buy one and try it? I know it sucks buying parts just on a whim, but what you guys are saying sure seems to be what the issue is
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Hey, they're $50-60 on EBay. Most folks here have a spare. They suck. You cannot really test them aside from pulling them out and re-installing them or reseating and checking for obvious frays in wiring or a bad connection.
At worst, you will have eliminated the most likely culprit and can get on with the troubleshooting and have a spare. Best case, problem solved, and time to get another CPS to have on hand. It definately sounds like the CPS is faulty.
At worst, you will have eliminated the most likely culprit and can get on with the troubleshooting and have a spare. Best case, problem solved, and time to get another CPS to have on hand. It definately sounds like the CPS is faulty.