Disco 2 Overboost at 3k rpm??

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02Disco2

02Disco2

Well-Known Member
Posts
439
Location
Hampshire
Decided to go for a drive in the rain (flash floods) yesterday eve and after accelerating out of a big puddle the revs got to about 3k rpm and then “bounced” and I had to lift off to get the gears to shift up (TD5 auto).

(Stupid Q) is that the turbo overboosting?! How can I check that properly?

I haven’t been out again yet to try and replicate it and have only had it happen once before when overtaking a cyclist on a road.

I know the car will Rev past 3k rpm but I don’t tend to drive it particularly hard normally….

maf is new (2 months) and genuine, map and iat are less than a year old and genuine, air filter is foam panel type (not K&N).
 
lynall said:
Wastegate can seize on the td5, you can work it manually whilst applying some freeing up oil down the shaft.
Click to expand...
I fitted a forge waste gate about a month ago and haven’t had any issues since fitting. Thread count/length matched the original one and the lever on the turbo was nice and free moving when I changed them over
 
one last post and then I'll give up.
does anyone think this could actually be a gearbox prob rather than an engine prob?
ECU's etc being the last refuge of a witch!;):(:mad:
 
02Disco2 said:
I fitted a forge waste gate about a month ago and haven’t had any issues since fitting. Thread count/length matched the original one and the lever on the turbo was nice and free moving when I changed them over[/QUOTE)

Have you checked the boost pressure? Iirc does not need to overboost by much to make the car sulk.
Click to expand...
 
I’ll plug the nanocom in and see if I can replicate it this eve.
I did go for a drive recording the data after firing the Forge and the readings appeared ok but will check again
 
Stanleysteamer said:
one last post and then I'll give up.
does anyone think this could actually be a gearbox prob rather than an engine prob?
ECU's etc being the last refuge of a witch!;):(:mad:
Click to expand...
Hmm interesting thought. It could well be but how on earth I’d be able to pin point that I don’t know. No faults or other issues from the box that I’m aware of
 
Record an inputs fuelling log od SD card with nanocom from a drive as to catch the symptom then you'll see what's wrong... also overboost should let a fault code stored for that
 
sierrafery said:
Record an inputs fuelling log od SD card with nanocom from a drive as to catch the symptom then you'll see what's wrong... also overboost should let a fault code stored for that
Click to expand...
Yes, will try to do that this evening and see if I can replicate the issue from Monday eve.
 
02Disco2 said:
All replaced with silicone hoses around 12 months ago so I don’t believe so
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Then if you didnt use spring loaded clamps double check how tight they are cos in 1 year "classic" clamps can get loose, i have the feeling that you'll be able to tighten the screw... happenned to me then i replaced them all with which i think are the proper ones, this type

sltc_pic1_736422da-0810-4021-a704-6211b0667279.jpg
 
sierrafery said:
Then if you didnt use spring loaded clamps double check how tight they are cos in 1 year "classic" clamps can get loose, i have the feeling that you'll be able to tighten the screw... happenned to me then i replaced them all with which i think are the proper ones, this type

sltc_pic1_736422da-0810-4021-a704-6211b0667279.jpg
Click to expand...
Great suggestion. Will check the clamps this eve before I drive to record on the nanocom and find some clamps on eBay to replace as those look much better
 
@sierrafery I don’t suppose you remember the sizes of the clips you used do you?!

HP pump voltage is ok and nanocom “inputs fuelling” is attached
I couldn’t replicate the issue on the drive this eve which is annoying
 

Attachments

  • 14-7-21_fueling.zip
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02Disco2 said:
@sierrafery I don’t suppose you remember the sizes of the clips you used do you?!
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No cos i removed the weak ones and i went with them in my hand to a store close to me which has all kind of stuff like this and bough similar size
open this https://parts.jaguarlandroverclassic.com/parts/index/part/id/L5.L5F.L5F02.L5F02020/brand/land-rover/ and if you click on + you can see nr 6 and 8 are shown as 60 and 80mm and for the others if you google out the p/n you'll find the sizes too, for example nr 5 https://www.brit-car.co.uk/product....r_turbo_diesel___defender___discovery_1_and_2
02Disco2 said:
I couldn’t replicate the issue on the drive this eve which is annoying
Click to expand...
yes, that data is ok, nothing wrong there
 
sierrafery said:
No cos i removed the weak ones and i went with them in my hand to a store close to me which has all kind of stuff like this and bough similar size
you can see from here https://parts.jaguarlandroverclassic.com/parts/index/part/id/L5.L5F.L5F02.L5F02020/brand/land-rover/ as nr 6 and 8 are shown as 60 and 80mm and for the others if you goggle out the p/n you'll find the sizes too
yes, that data is ok, nothing wrong there
Click to expand...
Thanks will take the existing clips off and measure the old fashioned way!
 
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