Engine Malfunction

[Maddog55]

Hi All got DPF removed last week and car was going great until this morning. Engine Malfunction warning started and ran forscan shown in the images below

No P codes and suggested can message for Engine Speed. Was speaking to Auto electrician suggested Cam sensor. Check output. Have not used FORSCAN much but is camshaft listed

in the sensor list. and If I monitor it what should it look like on the oscilloscope. Or do I just look at the values. What will determine if its faulty

Does anyone have other suggestion to look at with the u1900-20 code. It does still start just engine malfunction and Limp mode.

Thanks

 

[TomsFocus]

I also occasionally get that code, being a U code its usually just a CANBUS blip, I bet if you clear it, it won't return for a while.  

Very odd that you've got engine malfunction message and limp mode without any PCM codes though.  Not really sure what to suggest there!

Best not to say about DPF removal online as its actually illegal lol.  Who did your remap, was it a big company or indy garage?  Might be worth asking if they can check it.  I would expect a fault for DPF/EGR/fuel pressure or similar if it was a map issue though.

[Maddog55]

OK Cleared engine u codes and re checked all ok. But Engine malfunction now when ignition turned on and no error codes shown on any of the modules

If no errors and engine malfunction how does one proceed. Checked Speed and rpm on Forsan and all looked ok. Out of Ideas

 

Help 

[Phil21185]

I've read somewhere else about problems after a dpf gutting. There was something to do with checking the live data from forscan to read the dpf info. I can't remember exactly but I think the car was reading that there was a fault with it because one of the sensors was still active or something and they fixed it with ForScan or just unplugged it I think?

Sorry - that's not as helpful as it sounded in my head...

[TomsFocus]

Could be helpful Phil, I'd forgotten that, need to keep dpf pressure sensor and temp sensor unplugged for some maps so you could check those maddog.  Also didn't answer my question about who did the map for it?

[Maddog55]

Sorry Tom.It was a local Indy guy how specializes in DPF removal. Rang him earlier and he will check things on Monday (probably at a cost). Work was done

last week and only issues today. Also no P error codes. In car at them moment and got another error U1900-60 this time see below. Cleared that too and ran engine

awhile re-read and got the original u1900-20. Which I am told are not important codes but that dam Engine Malfunction.

Will disconnect the Pressure sensor tomorrow. You mentioned Temp is that the one at the bottom of the DPF/CAT

[TomsFocus]

Ah, that's a better code.  Although it's still a U code, a FACM fault can put the car into limp mode.  And the fact it comes back quickly is a good sign that its not just a glitch.

You may need to unplug the FACM which is under the rear seat area.  I would check with the guy that did it whether or not that should be unplugged though, different mappers do things slightly differently.

Just out of interest, had you recently filled up with fuel? 

The temp sensor is the one about halfway down the DPF can at the front (facing the radiator), if you follow the wire from it, it plugs in just under the piping on the left of the engine cover iirc.

 

[Maddog55]

Cohen I cleared the fact it did not come back it was the -20. Half filled nite before with fuel

[Maddog55]

Dam auto correct. I cleared the -60 code it didn't come back just the -20 one. 

[TomsFocus]

Ok, yeah it's still most likely the FACM causing the issue here and that will be to do with the mapping.  

With the old style of DPF on these, it required an additive to be added into the fuel.  This only happens when you fill up (uses a sensor in the filler cap).  Looks like it's still active and has 'requested' the FACM to add some additive and it has been unable to, causing a fault and limp mode.  This should have been disabled/deactivated in the map and may or may not have been unplugged.  I would check with the mapper whether or not he disables and/or unplugs the FACM.

The EPS fault shouldn't cause limp mode or illuminate the fault light but is odd it came back. 

[Dee_82]

They should have mapped out all this. I am err, "aware" of Euro4 DPF DV6 engines that have had their DPF "fixed" and there wasn't a problem with any sensor or module.  all sensors and modules would still be in place and plugged in and it would run perfectly fine.

I wonder if your local indy "specialist" used the Euro V version of his DPF software "fix" or something similar?

 

 

[TomsFocus]

15 minutes ago, Dee_82 said:

They should have mapped out all this. I am err, "aware" of Euro4 DPF DV6 engines that have had their DPF "fixed" and there wasn't a problem with any sensor or module.  all sensors and modules would still be in place and plugged in and it would run perfectly fine.

I wonder if your local indy "specialist" used the Euro V version of his DPF software "fix" or something similar?

 

 

I am also 'aware' of some from a large company that need the temp sensor at least unplugged, something to do with confusing the PCM to be getting a reading from it...  As I said, it's just different mappers choice really - I have even heard of mappers leaving the FACM active and just filling it with diesel, not really the right way to do it but it does work.  

[Dee_82]

Seems like there might be several ways of doing it then, pretty sure bet that they buggered it up though, i don't imagine they could in all good conscious charge you for a job that they didn't fix right in the first place. 

 

[Maddog55]

Thanks guys will leave well enough alone for now and see the guy that carried out the work on Monday. Let u know how I got on

[Phil21185]

4 hours ago, TomsFocus said:

Ok, yeah it's still most likely the FACM causing the issue here and that will be to do with the mapping.  

With the old style of DPF on these, it required an additive to be added into the fuel.  This only happens when you fill up (uses a sensor in the filler cap).  Looks like it's still active and has 'requested' the FACM to add some additive and it has been unable to, causing a fault and limp mode.  This should have been disabled/deactivated in the map and may or may not have been unplugged.  I would check with the mapper whether or not he disables and/or unplugs the FACM.

The EPS fault shouldn't cause limp mode or illuminate the fault light but is odd it came back. 

Ahh that's what I was thinking of! Eolys tank being empty...

Good luck with a fix.

[FatHead1979]

On 30/09/2017 at 1:25 PM, Maddog55 said:

Thanks guys will leave well enough alone for now and see the guy that carried out the work on Monday. Let u know how I got on

Too ***** right, I wouldn't be paying him another penny.  The car was fine (I assume) before he "mapped" it so I think it's fair to say on the balance of probabilities that his work is the likely cause of the issue your're having.

[Maddog55]

Ok Got feedback from the guy. You where spot on. The fuel additive module was causing issues on the CAN. This then was masking the real culprit

the glow plug control module which was then throwing up a Fault causing the limp mode. FACM now disconnected and Issue sorted with the glow plugs.

Car being tested now to make sure all clear. Should be good to be lifted later today.

 

 

 

[TomsFocus]

Nice one, glad it's sorted.