4TH CYLINDER PROBLEMS
 

HI.I THINK MY FOURTH CYLINDER IS FAILING EMMISSION TEST GAVE A READING OF HI UN BURNT FUEL IN 4TH CYLINDER.SYMPTOMS ARE MISSFIRE AND LOW REVS AND MISSING WHILE TURNIN OVER.AIR FLOW AND COIL PACK LEADS ALL RUNNING OK.GONA DO COMPRESSION TEST 2 C RESULTS.WAT ARE THE SYMPTOMS FOR 4TH CYLINDER FAILING:wonder:

as you said,then a strange ticking noise from right hand side of the engine,0 psi on compression test and smoke in the end....thats why i needed to rebuild mine,failed piston on cyl 4 :(

thanx for the bad news:( :cry:

No.2 went on mine, I had a lumpy tickover but otherwise the engine ran fine for 25,000 kms. I had a feeling in the back of my mind that it needed a compression test and so got one done......only to find that no.2 had half the compression of the rest of the cylinders and lost 85% on the leakdown test. I stuck some 'piston ring release' additive in, as well as injector cleaner.....2 weeks later I was driving home looking like a Red Arrow with the mother and father of all smoke trails in my wake and lots of funny looks from fellow commuters.

Now my old EJ20 engine is being replaced with a new 2.5 sti unit complete with all the goodies - forged pistons, billet rods, polished and ported heads, big injectors and turbo etc, etc. I guess every smokey engine destruction cloud has a silvery sti lining :)