andrew
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| posted on 11/7/14 at 07:33 AM |
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limp mode
my sprinter 413 van 03 ocasionaly goes into limp mode ,no warning lights on , but will corect itself when turned off for a while , diagnostic doesent
show any fault , any ideas ,, thanks,,
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ashg
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| posted on 11/7/14 at 07:53 AM |
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egr valve or hole in intercooler/boost pipework would be my bet.
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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DW100
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| posted on 11/7/14 at 08:01 AM |
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If the ECU realizes that there is a fault and goes into limp mode then it will log a fault code.
If you do enough drive cycles after this without the fault occurring then it may erase the code from its memory.
There may be a fault that causes reduced power that the ECU doesn't recognise as a fault and doesn't log a fault. These are more tricky to
sort out and where advice from the internet make owners looking for a supposedly quick solution throw parts at it based on peoples guesses.
There are hundreds of possible causes, without proper diagnosis you may get lucky and get it right first time, but equally I've seen times when
people have thrown thousands at it without sorting the issue.
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owelly
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| posted on 11/7/14 at 08:06 AM |
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As said, faults should be logged even if they are 'pending'. Check for intercooler hoses sucking themselves flat or delaminating
internally.
http://www.ppcmag.co.uk
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haz87
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| posted on 11/7/14 at 08:44 AM |
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As above really. Ideally you'd want to do a scan just as its gone into Limp as this is obviously your best chance to read a code
'if' it is managing to clear itself. How long did you leave it between the issue and then scanning previously?
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Trollyjack
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| posted on 11/7/14 at 08:46 AM |
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Have you had the memory read with a ODB2 reader there should be a Fault code in there
[Edited on 11/7/14 by Trollyjack]
TrollyJack
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JAMSTER
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| posted on 11/7/14 at 09:02 AM |
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turbo i had one that done this and the vains in the turbo were sticking
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GreigM
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| posted on 11/7/14 at 08:11 PM |
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quote:
Originally posted by JAMSTER
turbo i had one that done this and the vains in the turbo were sticking
I would say this is a possibility. It is more commonly the actuator which varies the vane position, this can be refurbished. However it can also be
the turbo vanes as above, this is less common and I'm unsure if it can be refurbed. Either way a fairly big job and downtime for the van.
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DW100
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| posted on 11/7/14 at 08:45 PM |
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Sticking turbo, actuators, split pipes and burst intercoolers will give poor performance but should set codes for boost pressure deviation. You will
normally be able to hear boost pressure leaks as you drive.
Depending on whether it is Euro4 or Euro5 emissions spec it may be possible for an EGR valve to stick and not give codes. Euro 5 requires feedback of
EGR valve position.
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