Rough Run - chasing problems.
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Rough Run - chasing problems.
Hey y'all,
I'm sure it's been covered. If it has, please point me in the right direction. (I'm the new kid here, first day)
I just bought a 2004 f250. Inpicked it up pretty cheap, because it runs rough. I was told by a mechanic that it was the IPR valve. So I replaced that, and it still runs rough. It almost sounds like a misfire to me. However, I have no CEL. I picked up a ScanGuard 2, and it shows no codes. (I also know nothing about how to actually use the ScanGuard so help there would be appreciated). Where should I go from here? I'll try to get a video of it running uploaded at some point.
I'm sure it's been covered. If it has, please point me in the right direction. (I'm the new kid here, first day)
I just bought a 2004 f250. Inpicked it up pretty cheap, because it runs rough. I was told by a mechanic that it was the IPR valve. So I replaced that, and it still runs rough. It almost sounds like a misfire to me. However, I have no CEL. I picked up a ScanGuard 2, and it shows no codes. (I also know nothing about how to actually use the ScanGuard so help there would be appreciated). Where should I go from here? I'll try to get a video of it running uploaded at some point.
Logistics Pro
Joined: Mar 2013
Posts: 4,097
Likes: 23
From: Kissimmee,Fla
Welcome to the club.Scanguage isn't a great code reader.Torquepro or Forscan is a better bet. You have to get a OBDll dongel off eBay and down load the app for either. Both are about 5 bucks and the reader is about 20 shipped. Best money you will ever spend for your 6.0.
Fleet Mechanic
Joined: Nov 2016
Posts: 1,343
Likes: 94
When we were 6.0 newbs, the truck had a rough idle and would shake shifting into high gear.
Decided to spend some time with the dealer and they ran it through a thorough diagnosis.
Gave us a print out showing engine parameters, engine was healthy, suspected one bad injector.
We purchased an injector and installed it in the driveway and it ran great afterwards.
Dealer changed us $169, great bargain to get a health check and diagnosis on the new to us truck.
Decided to spend some time with the dealer and they ran it through a thorough diagnosis.
Gave us a print out showing engine parameters, engine was healthy, suspected one bad injector.
We purchased an injector and installed it in the driveway and it ran great afterwards.
Dealer changed us $169, great bargain to get a health check and diagnosis on the new to us truck.
Senior User
Joined: Nov 2014
Posts: 1,776
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From: France
Originally Posted by Per4mance
Welcome to the club.Scanguage isn't a great code reader.Torquepro or Forscan is a better bet. You have to get a OBDll dongel off eBay and down load the app for either. Both are about 5 bucks and the reader is about 20 shipped. Best money you will ever spend for your 6.0.
Lead Driver
Joined: Dec 2006
Posts: 6,496
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From: So. Jersey
From there check harness. You can also ohm out the injector coils at the plug to see if a cool is bad. At the injector plug, You would ohm pin 1 to pin 2 for one coil. Then pin 3 to 4 for the other. If you get no reading then it's bad.
Without Ford's scanner (IDS), that's where I'd start.
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How do I ohm the injector coils? I have a voltmeter that reads ohms... I just don't know how...
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Joined: Dec 2014
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From: Jersey Shore
Set the meter to Ohms, or if it has continuity with a tone to that.
First coil check.
One lead tip to the pin shown as 1, then the second to pin 2. If you have an ohm reading (or tone), it's good.
Second coil check.
One lead tip to the pin shown as 3, then the second to pin 4. If you have an ohm reading (or tone), it's good.
First coil check.
One lead tip to the pin shown as 1, then the second to pin 2. If you have an ohm reading (or tone), it's good.
Second coil check.
One lead tip to the pin shown as 3, then the second to pin 4. If you have an ohm reading (or tone), it's good.
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After changing it out, and getting it running again. It solved about 85% of my problem. There's still a little lag when I step on it (seems like it's not got 100% power.) But the engine is running good now! Thanks!
(Although in taking the turbo off and back on from when I replaced the IPR valve I now have a air leak somewhere. So I gotta track that down)
Fleet Mechanic
Joined: Nov 2016
Posts: 1,343
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You can still have a bad injector. Checking resistance will tell if the injectors electrical components are in spec. They can also have physical problems like worn spool valves or stiction from accumulating debris. When you get a code reader check for cylinder misfires.
Postmaster
Joined: Aug 2015
Posts: 3,910
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From: NW IA
Wow that worked wonders. I was able to isolate an injector that was bad, tracked down a new one an hour away.
After changing it out, and getting it running again. It solved about 85% of my problem. There's still a little lag when I step on it (seems like it's not got 100% power.) But the engine is running good now! Thanks!
(Although in taking the turbo off and back on from when I replaced the IPR valve I now have a air leak somewhere. So I gotta track that down)
After changing it out, and getting it running again. It solved about 85% of my problem. There's still a little lag when I step on it (seems like it's not got 100% power.) But the engine is running good now! Thanks!
(Although in taking the turbo off and back on from when I replaced the IPR valve I now have a air leak somewhere. So I gotta track that down)
Loosen the four turbo pedestal bolts, then realign the two clamps and snug to spec.
Tighten up and torque the four pedestal bolts down and you should be good to go.
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