F250 emission control faults

Submitted: Tuesday, Nov 07, 2006 at 00:19
ThreadID: 123038 Views:3437 Replies:6 FollowUps:4
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Has anyone with an F250 experienced a fault where the emission control warning light comes on and the engine sounds as if it is running on only half the cylinders and banging inside as if something is broken?

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Reply By: Bushtracker - Tuesday, Nov 07, 2006 at 01:03

Tuesday, Nov 07, 2006 at 01:03
Pre-ignition knock, and running on half the cylinders could be the CPS "Cam Position Sensor". It is a renuable part that routinely goes out, maybe 40% of the time on Fords from about 150,000 to 250,000 miles. It will cost you $600 to as high as a ridiculous amount of $800 to have it done by Ford here (they are out of their minds).

If that is not the problem, it is like belts and hoses, everyone should have one as a spare. There is one in the glove box in my old F-250. Estimated 15 minutes to install it, one socket and screw driver, something like that. Someone else was in here this morning and had it done... Might not be the problem, but it is the first place to look, and nothing lost if you do not have one, as you probably should have the spare anyway.

I suggest air freight one from Powerstrokeshop.com for $98 US, here in three days.
Otherwise you have to plug in a Code reader and download the DTC (Diagnostic Trouble Code) but many times it will throw so many fault codes, the Dealer will do the CPS first, just to rule it out... See... I have help for you even if you harass me... Ha!

If you were to get the codes downloaded, I am very active on some Ford Forums doing research for Customers here that are running Fords, just for occasions like this... With your Codes I can email some Friends that are Ford Technicians and they will have a definitive answer. But the CPS is my bet, and the first place they routinely say to look.

Ranger, trying to look after everyone.....
AnswerID: 569665

Reply By: Turist - Tuesday, Nov 07, 2006 at 01:35

Tuesday, Nov 07, 2006 at 01:35
If it is also blowing black smoke when you apply throttle it sounds like the cam Timing Sensor may have failed.

When mine went the engine sounded like it had a busted conrod.

"Do It While You Can"
Nobody is getting any younger.

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Follow Up By: Turist - Tuesday, Nov 07, 2006 at 01:36

Tuesday, Nov 07, 2006 at 01:36
Or as Steve more correctly said, C.P.S.
"Do It While You Can"
Nobody is getting any younger.

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Follow Up By: Bushtracker - Tuesday, Nov 07, 2006 at 02:08

Tuesday, Nov 07, 2006 at 02:08
Thank you for that backup Bob..

If anyone wants it I will get a copy of the exact instructions of how to swap it out. It is not difficult, in the front of the engine, there are just a couple of tricks.... I have spent considerable time in Research all this year on several Ford Forums, as well as the top 20 Performance Diesel Products type companies advice, to help people troubleshoot their Fords as well as learn myself... You can get a copy from me and stick it with your CPS in the glovebox.

I am still active, as now I am learning on the latest engine and transmission tricks, in preparation for a Super Duty "Super Truck" mini Prime Mover build, in about 2008. It keeps my mind active, and I am also a bit of a "Rig Junkie"... Or as they call it "Compression Ignition Addict" on one Forum...

Turist is a Rig Junkie too, only a little different style, more of a luxury towing vehicle.. My style is 4x4 Extreme Duty truck, and the idea is to have a round town truck that can do a 4x4 Prime Mover job with a van and also a 38' Pantech HorseFloat. These are the two styles of "Rig Junkie" as somebody coined it recently, Ha! Both are tops in their field. That is why there are Chevies and Fords... Kind Regards..

If I cannot be on a horse, then I want to play with a bunch of horses under the bonnet.
Ha! .... Ranger...
FollowupID: 846565

Reply By: Black Cobra - Tuesday, Nov 07, 2006 at 10:10

Tuesday, Nov 07, 2006 at 10:10

Would like the set of instructions on how to replace the CPS. I had mine replaced at 28,000 km's when my truck stalled on me for no apparent reason, twice and would not start.

After reading the forum ways back about CPS failuers and from help of fellow boggers I purchased a spare CPS from the pwerstroke shop like you said.

My main reason for this post is that when I told Ford about it and said I wanted the CPS replaced because this problem has ocurred in F250's from 8,000 ks upwards, you guessed it, they said they could not find a fault but after convincing Fords head office they replaced the CPS under warranty for me.

Oh! by the way to back up my complaint I handed them a print out off the bog forum from a fellow bogger who had this same problem when touring WA and NT and took their F250 to about three Ford dealers and they all could not find the fault. Eventually when they were in NT Ford flew a specialist from Melbourne to the NT to solve the problem and guess what, in 5 minutes he said CPS. You may remember this post a way back.

So don't trust these dealers once the vehicle is sold they don't want to know you. The reason for the instructions is that I had the mechanic at Ford show me where and describe how to change the CPS and he made it sound difficult, ummm! wonder why?

Thanks in advance!

AnswerID: 569667

Follow Up By: Bushtracker - Tuesday, Nov 07, 2006 at 18:32

Tuesday, Nov 07, 2006 at 18:32
Hello Black Cobra,

In truth, the Ford Dealers here do not get the practice or have the exposure enough to being doing the Diagnostics as well as might be desired. There are just not enough Fords to have the training and such... That is the principle reason I have about 400 Threads studying on many Ford Forums and Performance Diesel Aftermarket sites, getting an education so I can help you Boggers. and myself of course. At least Ford has the Aftermarket Diagnostic Tools available to read and explain any DTCs that show up. I have not seen this for the Toyota electronics but it would be a Sterling idea.

Anyway, I have made it one of my Pet Projects in 2006, and will help in any way I can, free for the asking... Stewart, I will post a link to the instructions for you to download.

Regards, Ranger
FollowupID: 846566

Reply By: Noosa Fox - Tuesday, Nov 07, 2006 at 22:03

Tuesday, Nov 07, 2006 at 22:03
I have just returned home from the Ford dealer and the Service manager agreed that it is most commonly the CPS unit that fails but when it does it is always included in one of the fault codes. In my vehicle it is not included and tests out as being OK.

The codes that have shown up are:
P1316 Injector drivers module
P1294 Injector High Side Banks
P0113 Air Intake sensor.

All of these tested OK so that are tracing the wiring to see if there is a broken wire or blown fuse somewhere. So far it has them stumped.

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Reply By: NIK `N` OFF - Tuesday, Nov 07, 2006 at 23:14

Tuesday, Nov 07, 2006 at 23:14
Steve if you be so kind as to post me the details on the CPS replacement it would be appreciated.

On another subject i have been to Ford and they have agreed to replace all the inner door seals to a newer one piece version, apparently the original door seals have a join along the bottom and after time they come apart letting dust and whistle from the wind going past them, the new seals give a firmer closure on the door also.

Plus they have ordered the new rear brake hoses to stop the rubbing on the hand brake cable.

I checked my radiator hoses for rubbing but these had already been fixed.

On my mates F250 i noticed he had a forward inner plastic gaurd on the inside of his rear wheel arches, i only have the two at the rear of the arch, he told me that Ford are issuing these out also under warranty to alleviate any stone damage from the tyres. I am yet to follow up on that.

Any other issues that your aware off that I need to attend to?


Mick [not Nick ;-)]

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Follow Up By: Bushtracker - Wednesday, Nov 08, 2006 at 00:06

Wednesday, Nov 08, 2006 at 00:06
Hello Mick,
I dunno about the "Nick" , sorry, if it I did it was a typo... I do not use my glasses that much, and type Professional speeds as I think, that is why there are so many grammatical errors..Ha! The higher the Profession, the worse the spelling!! You ought to take notice of the lousy english of Doctors and Nurses, scare hell right out of you...!!!

More to do to your Ford ?
Anyway, if you have read the posts, the "Ranger Mod" on air intake on the filter in lieu of AIS system... Something like 17% better fuel economy..

Synthetic oil in the tranny, and optional temp gauge, plugs right in, there is a hole ready made for it on the side above the pan... Read the Post...

Carry spare serpentine belt, maybe hoses, and Fuel Filters for sure, I like the Baldwin at about 1/3 the cost of Ford ones... Carry a half dozen in case of a bad load of diesel to see you through...

That is about it, except I would carry some kind of a DTC reader, like the SuperChips MicroTuner, or something cheaper... Not for the Power Chip up which can get you into trouble but for the DTC code reader... But I would advise that to anyone with electronic engine managment..

Look, the rest is standard Outback stuff, the normal recovery gear, first aid, shovel, the normal long list of Outback travel gear..

Face it Mick: You are already in the 'Waaaaaay Overkill" range of things Mick, like an excited little kid that can't wait for Christmas!!!!!!!!!! Mind you, that is how I am... I like that kind of enthusiasm.. But if you look too hard, you are just running yourself ragged, filling in time waiting for your new Bushtracker.. Ha!

Patience, Patience.... Kind Regards, Ranger...

FollowupID: 846567

Reply By: Noosa Fox - Thursday, Nov 09, 2006 at 03:56

Thursday, Nov 09, 2006 at 03:56
Well our local Ford dealer eventually found the problem.

In under the rocker cover there are a large number of wires running in a lume and some of these go into a socket with pins in. Apparently the corrigations had made the wire connection to one of these pins loose and that then shut down half the engine.

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