my car is missfiring like a fooker i have tried everything i can think of plugs /leads/ dizzy cap /injectors / and all the sensors compresion test and there all ok what its doing is missing on no.2 piston when you pull the plug lead off it dont make any diffrence its really pissn me off if i dont sort it soon im gonna sell it

lee

 

well thats got me stumped what happens if you unplug number 2 and put a spark plug on the end of the lead (ie just open to air) will it spark.. i find it quite had to see why one plug wont fire if the rest will.. especially when youve changed the dizzy cap and leads!

 

it sparks normal like the rest m8 took the injector out to see if it was spraying right and it is ok to

 

Mine did that last winter,changed the plugs and all was fine.

 

Did you change the cap because of the missfire or was doing so anyway? I.E are the leads on the cap in the right firing order?

 

This was aksed on the RSOC bbs, seems nothing was checked we suggested

 

Hi mate - do a compression test on that cylinder.

 

i have done everything m8 what everyone said made no diffrence one thing i did not mention it runs better when cold and before you say it ive had the mixture setup

 

And compression on cyl 2 is fine?

 

yeah m8 compression on cyl 2 is fine

 

hmmm if it sparks with a plug just 'plugged' into the lead then it must be firing ok.. id say you have some sort of porblem on no2, prime suspect would be head gasket but if compression is ok then i dont know

 

plug gaps correct?

 

plug gaps yeah i tried the plugs out of me bros turb which run perfect in his but like i said before runs alot better when cold do you think it could be a coolent sensor or sumit or even the fuel dizzy ?

 

when does it misfire? Mine was misfiring on no#2 at 6000rpm due to a valve not seating. Have you tried a bore leakage test?

 

Exactly my next thoughts john. I was going to say a sticking valve/sticking lifter/or fooked lifter!

Take the lifters out of their bores on cyl 2(inlet and exhaust). If either of them have been sticking the underside of one will be very worn(sometimes rounded off cam). If not it could be a valve sticking!

 

ok m8 will try it

 

wow you mean I said something that made sense

 

Sorry Jon i dont follow you