Help needed - my 850 R manual - part 2

**Giles** · Monday 14th March 2011, 23:09

OK - following on from my last thread, here is a video shot tonight after replacing all vacuum hoses, all boost hoses and (stupidly) just jetwashed the engine bay ......

The converter i used cut the last minute off the video (trial version), but car does rev up on it's own every so often .....

[ame]http://www.youtube.com/watch?v=T7llGypOtoA[/ame]

**p fandango** · Monday 14th March 2011, 23:14

you've got a number plate bulb gone mate

**Giles** · Monday 14th March 2011, 23:14

Originally Posted by p fandango

you've got a number plate bulb gone mate

Is that why the revs go up and the lambda light is on

**p fandango** · Monday 14th March 2011, 23:23

Originally Posted by Giles

Is that why the revs go up and the lambda light is on

i'd of said yes if it was a P2, anythings possible with them lol. Your better off getting the codes read see whats up with the light, as for the revs it could be the idle control valve needs cleaning

**mark_eire** · Monday 14th March 2011, 23:26

nice commentary! haha
Might have just got a bit of water in around the fuses or something? seems to be running alright there now! Nice car! engine looks nice and clean after the powerwash! haha..i wouldnt be doing that again in a hurry

**Giles** · Monday 14th March 2011, 23:27

Just uploading full video (5 mins and 580MB !!!!). Will be 2 hours so will post the link tomorrow - gives a better idea the last 2 minutes ......

**mark_eire** · Monday 14th March 2011, 23:34

make a codereader and get ur codes..doesnt cost anything really if you have a spare 12v led lying around.

**p fandango** · Monday 14th March 2011, 23:36

Originally Posted by mark_eire

make a codereader and get ur codes..doesnt cost anything really if you have a spare 12v led lying around.

LINK

**Giles** · Tuesday 15th March 2011, 06:53

and here it is in full.....

[ame]http://www.youtube.com/watch?v=ixVbqWHchBM[/ame]

**Giles** · Tuesday 15th March 2011, 07:09

Originally Posted by mark_eire

make a codereader and get ur codes..doesnt cost anything really if you have a spare 12v led lying around.

I have got a codereader .... it's now locked away in my broken glovebox

**Rnash2002** · Tuesday 15th March 2011, 07:55

I would say water is the problem and will probably all dry out in time and everything going back to normal,going on the lights not working and now they are.

**lance** · Tuesday 15th March 2011, 09:35

Hi Giles, You need to drive it help get all that moisture out and keep her running well! It is likely to be a bit of dirt or water in the idle control valve you might find taking it a decent run could clear the code too as this has happended to me when I first bought the car. Miss Whiplash would sometime throw the lamba light and then go off again (sometimes on the way to the garage to get the code red) also plumbing in an airleak such as a dump valve could also cause the lamba light to come on.

**si850r** · Tuesday 15th March 2011, 18:08

the way your revs are going up and down on there own is exactly what mine is doing. Iv e stripped off and cleaned the idle control valve and cleaned the part where it meets the engine block ( cant remember what its called) and it aint made a blind bit of differance.

**The Flying Moose** · Tuesday 15th March 2011, 18:31

As mensioned water ingress will be the problem, I learnt the hard way after also jetwashing the engine bay of smithness's 850'R and driving to Autosport international the next day to have the car suddenly violently missfiring.

The dissy cap should be your first port of call as water easily ingress's here and leave's deposits on the rotor arm contact points, these need to be cleaned off. Also check the ignition coil pack. Its highly unlikely to be the spark plugs as they are well waterproofed by the pastic cover and rubber grommets which hold them in place.

**Volvostorm** · Tuesday 15th March 2011, 18:51

With the lack of dash lights etc, could also be a dodgy ignition switch, if it does it again, wriggle the key, see if that helps.

Also, with the revs, is the air-con turned on? That makes an engine surge, and put a clip on that hose.

**si850r** · Tuesday 15th March 2011, 19:56

i aint stealing giles thread here, but i haven t jet washed my engine bay for this fault to start..The air con isnt on either (its too bloody cold for that yet!!!!) Im goona whip the plugs out on mine to see what state there in. I ve read somewhere to gap them to.07 instead of 0.6, this will apparently make a massive difference

**kee1173** · Tuesday 15th March 2011, 20:35

My favourite answer can cause this and that is the Maf sensor...in giles case could be some water got into it and Si's case wortha check....but a Maf sensor or Air flow meter as some like it called causes errattic revving, or when flooring the car the revs slowly build up but dont often go past 2000 rpm....also i have had driving along at 70mph going to accelerate and nothing (if anything going slower) and then a hiccup almost like hitting the brakes then surging again....i have had 3 MAF sensors go and all with similar but diff symptons and erratic reving was one of them....not saying i am right but worth a look...

**lance** · Tuesday 15th March 2011, 21:19

Its recently had a brand new bosch air flow meter so it shouldnt be that.

**kee1173** · Tuesday 15th March 2011, 21:32

Ohh Ok Lance didnt know that....was more saying with jetwashing the engine might be another area water got in, on one of my Renault traffics that was the reason why the Maf went on that, as when it rained the bonnet seal was broke and it dripped onto my MAF, water got into it and shorted it out ....

**Giles** · Tuesday 15th March 2011, 21:41

Originally Posted by kee1173

Ohh Ok Lance didnt know that....was more saying with jetwashing the engine might be another area water got in, on one of my Renault traffics that was the reason why the Maf went on that, as when it rained the bonnet seal was broke and it dripped onto my MAF, water got into it and shorted it out ....

The airbox (incl MAF) was off the car when it was jetwashed........

May have got water in the dizzy cap so will dry that out later

Could be plugs as plastic cover was off......

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