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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van SPONSORED BY:

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  #1  
Old 10-02-2009, 02:20 PM
rickatic rickatic is offline
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Still runs bad-Help-P0275 code

OK, per my previous post, after losing the oil cooler, we replaced it along with head gaskets, ARP studs and a MBRP turbo back exhaust. EGR delete done several months ago. Truck was running great before oil cooler debacle. I purchased an Autoenginuity scanner with the enhanced Ford package and we have ran some scans. The only codes we get are EGR delete related and P0275. We have checked all connections,especially cylinder 5. All the injectors were reinstalled in the same cylinders as they came out of. The heads and cylinders looked perfect when we had it apart. Heads were decked before reinstalling. Any advice is appreciated. The tuner mentioned in my signature has not been installed yet.
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Old 10-02-2009, 06:58 PM
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Check the connector and the wiring to injector #5 .... or it could be a bad injector.
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Old 10-02-2009, 07:08 PM
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Mark,

Thanks for all the help you give on this site. I have checked the wire connections, cleaned the connectors and looked at the harness until my eyes hurt. What gets me is the truck ran perfect until the oil cooler went. Can you cause an injector issue by just taking it out and putting it back in? Is there a way to use the Autoenginuity to test the injector?

Thanks
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Old 10-02-2009, 07:15 PM
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Mark,

Can you cause an injector issue by just taking it out and putting it back in?

Is there a way to use the Autoenginuity to test the injector?

Thanks
Yes and yes. There are ways you can damage an injector on the install. I don't know how to use the Autoenginuity, but I have read many times that it can do injector tests.

I know you do not want to hear it, but it could be poor compression on that cylinder also.
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  #5  
Old 10-02-2009, 07:41 PM
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Mark,

While disassembled, I looked very closely at all the visible mechanical issues. The #5 cylinder was actually near btdc exposing most of the cylinder wall. The crosshatching on the cylinder wall looked like new. The pistons looked good as well. Heads were inspected and decked at a very reputable shop. All of the rocker assemblies looked good. Hence my confusion

Thanks
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Old 10-02-2009, 07:52 PM
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Maybe some others can help you w/ the Autoenginuity. Otherwise, you might want to change that injector out and see.
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  #7  
Old 10-03-2009, 09:06 AM
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Does it run like it has a bad injector? Is it missing and how long has it run since you reinstalled everything? It might take a day to get all the air worked out and the truck starts normally.
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Old 10-03-2009, 11:25 AM
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It runs but smokes dark grey and is way down on power. The AG scan keeps posting the P0275 code. Would air in that injector supply/delivery cause this? Turbo whistle seems lower but no other codes except missing egr system numbers. It has run maybe 20 minutes. I tried driving it around the block and it takes a while to get it moving good. Will I hurt it by taking it for a longer spin?

Thanks

Last edited by rickatic; 10-03-2009 at 11:28 AM. Reason: added info
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Old 10-03-2009, 12:44 PM
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Quote:
Originally Posted by rickatic View Post
It runs but smokes dark grey and is way down on power. The AG scan keeps posting the P0275 code. Would air in that injector supply/delivery cause this? Turbo whistle seems lower but no other codes except missing egr system numbers. It has run maybe 20 minutes. I tried driving it around the block and it takes a while to get it moving good. Will I hurt it by taking it for a longer spin?

Thanks
I would start it and let it run in the driveway for at least 20 more minutes before driving it. It takes a good bit for the air to work through the system. That injector may have been weak to start with. One other wiring thing to check on the injector and it's something Matty169 pointed out to me. Check the pin connectors in the injector but most especially the females in the harness. Sometimes they get pushed back in and don't make a really good connection.

After you get it back together and it gets good and warmed up take it out and drive it decently hard. It's not like you are trying to rebreak in your motor or did a complete overhaul. Give it a couple of WOT runs from 0-70, take it back and clear the codes and try again. You'll know you got all the air out when it starts normally.
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Old 10-03-2009, 08:13 PM
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Some literature I have states that if you have a SINGLE weak cylinder identified, then check the following:
1. wiring to injector (as already mentioned)
2. injector hold down bolt
3. injector copper gasket (is it present and in good shape)
4. faulty injector

If you suspect a faulty injector, swap it with another one and see if the code follows it.

Also, you can check for oil aeration....
1. Run the engine at 3000 rpm for a minute
2. Remove the EOT sensor
3. Take a smple and check for bubbles

It also states that you may have to operate the vehicle aggressively for 15-20 miles to remove excess air.
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Old 10-03-2009, 08:33 PM
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Thanks, Mark. I will look at these things tomorrow
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Old 10-18-2010, 04:19 PM
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Quote:
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Thanks, Mark. I will look at these things tomorrow
Hey rickatic, what ever came of this? I just had my PCM replaced like a week ago and now I'm getting this code. I've already cleared it once like 2 days ago and got it again. It has only skipped once in the driveway on high idle, and 2 times it has taken a really long time to crank. Other than that it runs great. Is this kinda the same issues you were having?
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Old 10-18-2010, 04:19 PM
 
 
 
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