Rb25 Miss

[PAVTECH]

hello,

I have a stock standard rb25, just catback.

cpl days ago i got an rb20 wastegate actuator from mate at work. fitted and removed boost solenoid. test drive and hit approx 14-15pound!

soooo... my assumption was, probably not original actuator for that rb20. the boost spike resulted in a missfire- spark

so I put it back to original actuator and connected the boost solenoid, fine for a few days, now today the mmhg stock gauge is reading almost 500mmhg, which i beleive is almost 10pound.

and it has a slight miss past 5,000rpm.

So i have a few questions.

did the boost spike stuff one of my coilpacks???

why is it now running 10pound? (it sits on 7pound until 5,000rpm and then creeps up to 10 for the remainder of the rev range) but i cant remember if this is normal....

did i connect the boost solenoid incorrectly??? if so , how come it was behaving itself for a few days???

I do however recall a small hairline crack on the plug for cylinder 6 and has this progressed to larger??? possible

anyway.

Could someone throw a couple suggestions my way. If anyone has a stock rb25 running stock boost solenoid could they advise the fitment, (from which pipe to which nozzle etc) I cant see how it would make a difference but anyway...

thanks

[abr33]

You did'nt put the damaged plug back in did you?

[PAVTECH]

had no choice, was 8pm and its my daily

[MJTru]

get that old plug out and get some good plugs in there, that would be my first though. next the miss fire after hitting 14psi is normal, but not the least good. this is because your AFM is maxed out. This event could have also fouled the plugs out, if that clack isn't the cause which i'm sure is the problem.

If the gaps were to big then the turbo would just blow the spark out at higher boost with your friends wategate. this event useally only happens after a AFM upgrade, and at high boost levels.