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Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

Power problems in rain

I’m looking for some advice please. Twice this week, after driving at 55(ish) mph on motorways in fairly heavy rain I have had an issue with the engine stuttering as if it had a fuel issue. After it happening again today would I be correct in thinking it may be electrical with water getting in somewhere? Both times I have pulled off the motorway and after a few moments it seems to clear, although I believe it may have a very slight stutter (but I may be imagining that).
Thanks all.

7th Apr 2018 5:16pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

How dry is your air filter when the stuttering starts? Ray
My build thread
http://www.defender2.net/forum/topic17615.html

7th Apr 2018 6:14pm

Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

Didn’t think to look at 5he air filter, I will however do so. Is that a problem with these? I know water gets in everywhere else

7th Apr 2018 7:15pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Don't know if it's a common problem, it was just a thought if you were driving in heavy rain. Ray
My build thread
http://www.defender2.net/forum/topic17615.html

7th Apr 2018 8:13pm

Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

Thanks I will check.........I’m sure it will rain soon!

7th Apr 2018 8:33pm

geobloke

Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4395

Raised air intake or Snorkel? Forward facing scoop type RAI heads (Safari and alike) have been known during heavy rain to allow water in to the filter box, soaking the filter. If you have a scoop type RAI head then turn it backwards to prevent this. Mine is backwards through most of the winter months to prevent this issue.

It would also be worth going over the vehicles earthing points, cleaning them up and putting a direct earth from the ECU to the negative terminal of the battery. May sound a little left field, however changes in humidity can do strange things to ECU controlled vehicles. Worth a try anyway.

8th Apr 2018 9:34am

Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

Thanks, it has a Mantec plastic jobby raised intake. Not long fitted so could be on the right track. Lots of rain on Tuesday so I will have a good look now and again then.
I will check the earthing as well, I opened the battery box as I thought that’s where the ecu was, I’m guessing it’s under the drivers seat? Or as on my 300 in the middle? I shall find it and check.
Cheers

8th Apr 2018 10:19am

Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

Thanks peeps, checked air filter.....which is now drying out.
Going to assume plastic jobby needs better sealing, or could it get in elsewhere ?

Thanks again
Kev.

8th Apr 2018 11:33am

geobloke

Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4395

Super. Glad it will be an easy fix. I do recall that Pumas had a big issue with the Mantec/LR plastic job snorkel and rough running in rain... would be worth search or two...

8th Apr 2018 1:19pm

Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

Funny thing is when we got our first defender, the 300, the guy we bought it from had fitted the Same snorkel and made a point of saying he had sealed it properly and most people don’t bother......I thought sales pitch but maybe it wasn’t!

8th Apr 2018 1:41pm

jonny2tanx

Member Since: 06 Jul 2014
Location: Harpenden, Herts
Posts: 156

2005 Defender 110 Td5 XS CSW Alveston Red

Kst80 wrote:
Thanks peeps, checked air filter.....which is now drying out.
Going to assume plastic jobby needs better sealing, or could it get in elsewhere ?

Thanks again
Kev.

I had the same last year driving through Poland in torrential rain, but I don't have a RAI fitted. Air filter was sodden with water being ingested through the air intake. Not sure if your RAI retains the original pipework from the wing to air filter but if so there is meant to be a drain valve in that pipework to drain off water. Mine was covered in Dinitrol, by the look of it, and was not allowing water to drain

8th Apr 2018 1:52pm

Kst80

Member Since: 28 Aug 2016
Location: Essex
Posts: 81

It does retain the pipe work, so I will check that as well. Cheers

It is absolutely soaked and currently drying out indoors!

8th Apr 2018 2:55pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Might be worth ordering a new filter and as above check the drain plugs along the pipe work for blockages. Ray
My build thread
http://www.defender2.net/forum/topic17615.html

8th Apr 2018 3:15pm

miker

Member Since: 13 Sep 2015
Location: Surrey
Posts: 1758

Mine has acceleration problems in wet weather. I have to keep moving my accelerator foot to avoid the water dripping on it!

8th Apr 2018 3:27pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Ray
My build thread
http://www.defender2.net/forum/topic17615.html

8th Apr 2018 3:53pm

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