misfiring

nJm

nJm

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Jan 24, 2002
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After fixing up the rocker cover oil leak on my 505 I decided to degrease the engine. I suppose I must have got water in the ignition system as ever since the engine mis-fires between 2000-3000 rpm, the car feels like it is convulsing some what in that rev range. At first it was far worse, sounding like an old aircooled VW, but after spraying WD40 onto all the leads and down the spark plug tubes it has got to were it is now.

Is there anything I can do to get the water out? WD 40 doesn't seem to help.
 
I did the same too on my 405.. answer is dont do it. mine has spark plug tubes about 10cm deep that hold a lot of watter :)

Firstly id take out all your spark plugs, they are probably fowled, clean em up or replace them.

stick a rag on a stick into the spark plug tubes try and clean out as much as possibly.
then id get an air compressor or something and blow all the minieral deposits from the spark plug tubing were all the watter has steamed away.

clean up the lead's too, maybe too much wd now causing some resistance.

good luck...
Nathan
Buy my Car
 
spamboy:
I did the same too on my 405.. answer is dont do it. mine has spark plug tubes about 10cm deep that hold a lot of watter :)

Firstly id take out all your spark plugs, they are probably fowled, clean em up or replace them.......
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DON'T take out the spark plugs if the tubes are full of water!!!!

Water is incompressible, (more or less) , unlike the fuel / air misture that normally inhabits your combustion chambers. Combustion chambers full of water can result in nasty things like ring, head or even conrod damage when the engine turns over.

So get any significant quantities of water out of those plug tubes BEFORE you pull the plugs, so that it dosn't end up down in the combustion chambers instead.

Cheers

Rod
 
nJm:


Is there anything I can do to get the water out? WD 40 doesn't seem to help.
Click to expand...
One trick that sometimes works Nick is to run the engine until it is up to operating temperature, and then remove leads, dissy cap, etc etc. The heat lets things evaporate and the exposure to the air lets the water vapour wander off to somewhere else.

If its running reasonably well it might be worth seeing if a particular lead or plug is at fault. Just disconnect them one at a time until you find one that doesn't make any difference.

Cheers

Rod
 
Nick,
Next best thing to an air compressor.... get the lid off a spray bottle (windex or the like) stick the tube into the spark plug tube and start pumping/spraying, works a treat wink

Cheers
Chris
 
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