Home > Puma (Tdci) > A Brain Teaser for all the Puma Genuises. Running Issues. |
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fekete Member Since: 24 Dec 2008 Location: Here on the other end of the computer Posts: 3626 |
Throttle censor maybe ?.... some one with more knowledge than me will be along soon and give you more info and help NEVER TAKE LIFE SERIOUSLY. NOBODY GETS OUT ALIVE ANYWAY
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12th Apr 2012 7:18pm |
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Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
How did you disable the passive coil, electronically or manually? Any excessive smoking before/during or after the event? Is the injector electrical circuit still firing when you get the drop in rail pressure? Is the throttle sensor plug contaminated?Unplug the EGR and see if this makes a difference. Check the MAP for excessive contamination. Have you done the fast idle test on IDS?
Brian. |
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12th Apr 2012 7:25pm |
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Dave-H Member Since: 08 Feb 2011 Location: Surrey Posts: 1507 |
mine had similar symptoms back in 2009 ... turned out to be a corrupted ECM [though it was showing a fault code as ECM] Took a while for LR to suss as ECM would re-map ok but fail again after a few miles
Replacement ECM module solved it Guns and Landrovers .... anything else is irrelevant. |
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12th Apr 2012 7:28pm |
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katsiki80 Member Since: 12 Apr 2012 Location: North East Posts: 6 |
Hi Guys.
Thanks for your prompt replies. Just to answer a few of your questions.
* I haven't noticed any unusual amounts of smoke from the vehicle at all, whether it be hot, cold, running well or poorly. * I'm using Autologic, so I'm assuming by fast idle test, this is the same as their leak test? Holds the vehicle at a given RPM for so many seconds? It failed this once during the early days of testing but have done it twice since with a pass both times. * Would a TPS cause the engine to die completely? I neglected to mention that it sometimes takes a few seconds cranking after it's cut out to restart the vehicle - and sometimes it'll cut out again immediately after. * I'm not sure if there is any easy way of seeing if the injectors are still firing using Autologic. * I had my suspicions of the ECM purely down to the fact that it logged no fault codes at all, even with a blown fuel pressure relief valve. Thanks again. |
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12th Apr 2012 7:47pm |
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Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
pm sent
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12th Apr 2012 8:02pm |
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MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2415 |
my 2 pc. Did you check on fusibles? speed sensor plug? Puma 110" SW
............................................................. Earth first. Other planets later |
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12th Apr 2012 10:17pm |
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cradgebank Member Since: 30 Dec 2008 Location: Nottingham Posts: 308 |
Gut feeling is its electronic, but worth checking the fuel lines for damage, either pinched or air leak and may be worth checking inside the fuel tank for debris that is restricting fuel flow. Richard
Either a 90, 110 or 130. Discovery 5 |
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13th Apr 2012 12:02am |
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katsiki80 Member Since: 12 Apr 2012 Location: North East Posts: 6 |
It's a bizarre one, it almost feels like a fuel shortage. The car never cuts out completely when you're driving, it just hiccups but violently enough to make the drive train clatter. It will do it fairly consistently when the car is warm but not even a whisper when it's cold.
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13th Apr 2012 7:47am |
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110SEB Member Since: 29 Jan 2009 Location: Essex, England Posts: 1444 |
Sounds very familiar. Check out my post called 'Unexpectedly cutting out' (i think). I've forgotten who else had this problem, but the culprit was a poor connection under the drivers seat in the ECU. Try that. It's as though the plug is being pulled altogether on the car.
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13th Apr 2012 12:54pm |
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katsiki80 Member Since: 12 Apr 2012 Location: North East Posts: 6 |
Just a quick update for everyone. Had the fuel tank out today, with the hope of finding something untoward lurking in there. The swirl pot had about 1/4" of what can only be described as jellied silt in the bottom. I was hoping this would cure it, as it would explain why it was considerably more pronounced when it was hot - ie the return being driven to the tank when the filter thermostat opened and caused the jet at the bottom of the swirl pot to disturb the muck and therefore clog the feed. Unfortunately, no joy - and this time the engine would die completely when it started to play up.
50% of the time, it will start straight back up, albeit with a little bit of cranking and then die immediately. If you leave it for a few minutes, it starts and runs ok but you can feel the problem is still in the background. I also ran it with the fuel rail pressure sensor disconnected and it did exactly the same. The engine ECU was removed and found to have lots of silicone in the pins, which has also been cleaned out but to no effect. The most frustrating part of this is the lack of fault codes. Does anybody have any suggestions? Has anyone had VCV wiring faults with no fault codes? |
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16th Apr 2012 7:55pm |
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katsiki80 Member Since: 12 Apr 2012 Location: North East Posts: 6 |
One word for you all - SOLVED!!! Thanks for all of your suggestions.
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17th Apr 2012 4:32pm |
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Bearcat Member Since: 09 Dec 2011 Location: Dublin Posts: 57 |
ehhh, you just cant leave us in the lurch with solved.....what was the definitive reason for your problems so we can all learn from your experience? Current...07 90 Puma commercial
Porsche 930 1988 (laid up) Previous Td5 90 & V8 90 |
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17th Apr 2012 4:36pm |
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MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2415 |
Puma 110" SW
............................................................. Earth first. Other planets later |
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17th Apr 2012 6:14pm |
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katsiki80 Member Since: 12 Apr 2012 Location: North East Posts: 6 |
I wondered if you'd be interested You might want to pay particular interest to the filter head, especially the inlet side of the feed pipe. Turned out ours was nearly completely blocked. The ports are very fine and look like they will be prone to blocking. The problem is, there's no filtration between the tank and that point, so any debris will get trapped there.
25 miles later and everything seems fine with the vehicle. I thought we had to be on the right track with what we found in the tank. |
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17th Apr 2012 6:36pm |
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