Misfire after engine wash

[Lukey904]

So washed my 172 engine today , developed a heavy misfire straight after , though maybe if got the coil too wet , dried all that and leads , stil missing , removed inlet manifold spark plug wells full of water , again cleaned and dried and refitted . Still misfiring . Anyone else got any suggestions what I may have wet and or damaged during the wash that would cause this , it's worse under heavy load ie low down the rev range . Cheers

 

[Fletcher]

French electrics and water do not mix!

 

[JamesBryan]

Why did you wash it. It's asking for trouble.

Need to make sure everything is dry and maybe a bit of WD40 on every wet connection to drive the water out.

 

[Lukey904]

Why did you wash it. It's asking for trouble.

Need to make sure everything is dry and maybe a bit of WD40 on every wet connection to drive the water out.

Well I have washed every other cars engine bay in the same manor and it has never caused any problem . My seat with the 20vt lump has no problems at all .

 

[DannyR]

French electrics and water do not mix!

I don't think any electric and water mixes well to be honest!

 

[STEVE.M]

French electrics and water do not mix!

Sounds like a proud and now wiser new owner.

 

[smac4494]

Renault engines are dry clean only! Didn't you read the label?

But seriously I wire brush all my engines and plasti dip them. Doesn't always last long but when it peels off you're still left with a clean engine

 

[smac4494]

Replace the plug cables and check the relay box. Might need to brush some residue off the terminals

 

[bozothenutter]

would you was your phone????

 

[Diagro]

When i see people Pressure washing their engine i have to cringe. All the cars electrics are in there and are NOT waterproof. if you want to clean it then get a brush and some engine degreaser and be gentle and avoid the electrics.

 

[Lukey904]

In my defence I have washed countless engines in this manor , admittedly usually diesels or coil on plug variety ! Anyway I left it in the workshop over the weekend with the heater on , runs fine now so happy days !!​

 

[Gus]

Could be worse

 

[Sigmamark]

To be fair, the Merc looks spotless!!!

 

[ADS_V6]

washed my 205 1.9gti engine once,i learnt a big lesson konked out on the road,cover the electrics loool never again

 

[Gaz_]

Water will have got down the pug holes, this then creeps up the plugs. Remove leads off the plugs and you'll see the issue. Good dry out should see you reet,

 

[imprezaworks]

Coil and new plugs needed.

 

[Lukey904]

Well the car runs nicely now and pulls hard but won't idle . On idle it cuts out I don't think this problem is related and may have been pre existing as it always ran rough at idle for the previous owner. Any ideas what to check ?

 

[imprezaworks]

Temp sensor

 

[Lukey904]

Temp sensor

Where is the temp sensor located mate ? And will unplugging it make it run generic fuelling , or have the same effect ??

 

[imprezaworks]

http://www.cliosport.net/threads/coolant-temp-sensor-location.663402/