Topic: misfire and lack of power on mv6 (Read 1117 times)

markey mark · « **on:** 11 September 2007, 22:19:14 »

my car is poorly

got a misfire at idle and is well down on power ! had a good look all weekend and unable to sort it ! fitted a ful set of genuine plugs but the right hand bank rear plug was seized

after lots of pushing and pulling and left to soak in oil over night managed to get it out and it had been cross threaded and the nose of electrode had split and half of it had fell off !!!! so after fitting new plugs and a known working dis pac and set of leads still got misfire and lack of power so tonight fitted a known set of working injectors and still misfireing and down on power !! compression test tommorrow night ! what im after is has any body had any probs whith the ceramic off spark plugs damaging valves

thinking possibly a bit ceramic has got stuck in valve seat

hope not but is it possible tia mark

Marks DTM Calib · « **Reply #1 on:** 12 September 2007, 08:32:14 »

I have had a poorly repaired set of heads shed a valve guide section and damage a valve.

I assmue the poorly plug is sitting in the thread ok?

markey mark · « **Reply #2 on:** 12 September 2007, 17:56:04 »

yea mark cleaned out threads with old spark plug with a cut down it !! so all plugs sat square and tight ! going out now to do the compression test any idea what i should be looking for on gauge bud ??

markey mark · « **Reply #3 on:** 12 September 2007, 21:24:54 »

done compression test and the cylinder with the broken spark plug is only at 75 psi nad the other 5 at 160 psi

looks like head off and new valves bugger

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Author Topic: misfire and lack of power on mv6 (Read 1117 times)

markey mark

misfire and lack of power on mv6

Marks DTM Calib

Re: misfire and lack of power on mv6

markey mark

Re: misfire and lack of power on mv6

markey mark

Re: misfire and lack of power on mv6