ongoing problem

[Andy D]

hi everyone after recently fixing an oil cooler problem(coupling at oil cooler had cracked and blown)we replaced pipes and topped up oil.but after starting engine there was what sounded like a misfire under bonnet,i"ve check compresion all between 133-140,odd noise stopped when engine warm,but searching on tickover.i took car for short drive and while trying to hold revs steady sounds like dump valve is trying to stay open,ok under acceleration(although i kept revs low bout 5000)but backfires when i take my foot off gas.i cant see any plugs off(thanks for suggestion Andy W)any ideas would be appreciated,thanks Andy D.

[Lambo Door Kits Ltd.]

Have you removed your spark plugs and see what they look like? Usually a big give away as whether the car is over fueling underfueling or oil leaking into the cylinder.

[andybob]

sounds like back draft from the turbo you could have and exhuast blockage

[Moff]

Split boost pipe ?

[Little Kez]

Originally Posted by Moff

Split boost pipe ?

Im with moff on this one

[Andy D]

thanks 4 your sugestion checked plugs while checking comprehsion,all looked good.really concerned bout odd noise,sounds like a cracking almost spitting noise.cant locate the source,any ideas?

thanks will check exhaust in the morn,will let u know outcome.

thanks for your input will check boost pipe tomorrow.









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[Andy D]

just 2 keep everyone up 2 date,i"ve booked the car in 2 b hooked up 2 a diagnostic mach.thanks 2 u fellas 4 your sugestions,will post outcome on thurs/fri. cheers Andy D.

[Andy D]

hi everyone,got the car back after diagnostic and the results said there was a prob with 11 and 22.now trying to source a camshaft sensor,but bit confused about code22 as he"s software has this relating to ignition system primary.but the forum has code 22 as fuel pump,anyone know for sure?