Which scv

[matt87]

D40 is hunting on cold start so I though I would start with replacing scv and fuel filter.

I have rung local supplier and he needs a diesel pump number which is understandable but how do I find that or how do I know which scv my d40 has, long or short ??

 

[bods]

Give a liqui moly diesel purge a go first. There are instructions on here and a few write ups. Had a similar issue with my d22 recently and running a can of that through it has sorted it out nicely. I didn't bother changing the fuel filter either as it's not very old...

 

[happy john]

I had the same issue and did the same as Bods suggested, no problems since.

 

[matt87]

Righto I will give that stuff a run through and see how it goes but she's stalling a lot on cold idle so might be worth changing scv

 

[happy john]

Worth a try Matt, stalling may indicate the scv is not good but worth a try mate.

 

[bods]

Mine was the same. Sometimes 2 or 3 stalls and really unsteady idle once it stopped stalling. Ran a can of that through and all good. I gave it a few good stabs of the pedal to get the scv moving through its full range to clean any crap out of it. Ran it up to 4000rpm for a bit too, but varied the revs quite a bit. Definitely worth doing as part of routine maintenance...

 

[happy john]

Bods, did you have a hunt in revs at say 1000rpm on start up when cold?, mine was playing up like that. All good now.

 

[matt87]

Will try this weekend
Thanks for the help

 

[bods]

Bods, did you have a hunt in revs at say 1000rpm on start up when cold?, mine was playing up like that. All good now.

Yep, if it would idle properly at all until it was warmed up. Was nearly impossible to back out of the driveway unless you let it warm up for a couple of min before moving too

 

[happy john]

Mine was not that bad but good to know it's an easy fix rather than pulling the scv out.

 

[nuckin futs]

numbers on the right hand side of pump. easy to see through drivers side wheel arch

 

[bods]

Mine was not that bad but good to know it's an easy fix rather than pulling the scv out.

Don't know how long it will last, but mine has just over 80k on the clock

 

[happy john]

Mine was not much more kms than that when it started to play up lol!.

 

[matt87]

Ran a bottle of liqui moly diesel purge through a tank today. Wasn't hunting as much during the day but I will see in the morning how she starts from cold.