MK7 2.4 115, noise on engine switch off, MAP/MAF

[kobe]

just bought a 2008 MK7 115 2.4 RWD ( viewtopic.php?f=5&t=154052 )



one puzzling thing, on switching off the engine there's a slightly strange noise about 2-3 seconds after the engine stops as if something else within the engine is still rotating/coming to a stop. it's not the belts as far as I can see .
Anyone come across this before? here's a vid of the sound which can be heard about 3 seconds in..
(click on this video thumbnail )


I'll shortly be doing a few servicing jobs, including oil+filters, PRV/SCV , IDS learn etc and I also hope to clean the MAF & MAP sensors.

is this the MAF?


and this the MAP?



understand the MAP sensor gets sooted up, what's a good chemical to clean without damaging?
does the MAF similarly need a clean or any other servicing?

finally, the van is a bit hesitant when cold and accelerating upto about 2000-2300 RPM, nothing drastic but can feel the enging not pulling smoothly, is this a know issue ?

[loot]

Noise on shutdown is the egr self cleaning itself.
Maf is on pipe from air filter, map is on ally pipe by inlet manifold.

You should consider doing a pcm update and pump/injectors learns to smooth the engine out.
Consider cleaning the inkjet manifold out etc.
Good service too if not done.

[kobe]

Noise on shutdown is the egr self cleaning itself.
Maf is on pipe from air filter, map is on ally pipe by inlet manifold.

You should consider doing a pcm update and pump/injectors learns to smooth the engine out.
Consider cleaning the inkjet manifold out etc.
Good service too if not done.

thanks Loot,
so the EGR valve cleaning sound is something I should expect to hear at every engine shut down? never did the on my '56 115 mk7.

I was hoping to get in touch with you as it happens (if you remember you did the PRV/SCV & IDS on my '56 115 last March).
Hope to arrange same thing on this van if you have a bit of spare time ?

[loot]

I'll remember you when i see you, my apologies as I've done lots of them
I can do them if you like, if you pm me when you want them doing and we'll sort it out.
Can't tell if your prv/scv need doing until the day tho so if you want to get them and keep the receipt or something?


Ps egr will do that if it needs to, mine doesn't tho, may be wearing out slowly but could last ages, also could be the maf/map signal slightly out causing it to clean the egr but that is not something i can be sure of(most likely the pot in the egr head)

Pps. Are you the chap that makes the knives?

[kobe]

I'll remember you when i see you, my apologies as I've done lots of them
I can do them if you like, if you pm me when you want them doing and we'll sort it out.
Can't tell if your prv/scv need doing until the day tho so if you want to get them and keep the receipt or something?


Ps egr will do that if it needs to, mine doesn't tho, may be wearing out slowly but could last ages, also could be the maf/map signal slightly out causing it to clean the egr but that is not something i can be sure of(most likely the pot in the egr head)

Pps. Are you the chap that makes the knives?

Thanks loot, will get in touch via pm to arrange, may be a few weeks if that's ok.
No don't sell knives!! Do you recall checking my van out against yours for the switch on the sliding door, ohh and we lost a socket down the suspension!!

To be honest as my last visit would just change prv/scv as a matter of course if possible, seems to sort out all sorts of hassles and is practically a service item I reckon .

Any advice on what to use to clean the MAP? Is there anything recommended to service or clean on the MAF?

Thanks

[loot]

Ah i remember the socket
I just use something soft to get the crud off the sensors if needed