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View Full Version : HELP sr20det random misfire, blowby, doesn't smoke


taritte
12-12-2013, 02:29 PM
Hey guys I searched but couldn't find anythig for my problem,the engine is a
-sr20det redtop on 10psi
-z32 maf, walbro 255 and afpr
-isis intake manifold and fmic
Well I'm not sure if the problems are coincedence or I have more than one problem.
At first it was just a random misfire mainly in below freezing weather(car was always warmed up before driving) then progressed into a bigger problem.Now it starts up fine but when you go to drive it it'll get down the street misfire and stall. It'll start righ back up, but when I let it run there is crazy blowby and the radiator has a lot of pressure even though it wasnt close to warm or running that long. I searched my symptoms and all I got was blown headgasket but it doesn't smoke and no bubbles in the radiator or mixed fluids. Also my boost gauges vac reading hasn't changed from then and now if that means anything.
Timing is mechanically right but I don't understand why its stalling and building pressure but no smoke.
Any help or suggestions would be awesome I'm new to sr's and don't have much tool access, so I'm hoping its something simple and not a headgasket.