09-22-2016, 10:39 PM
Join Date: Jul 2009
Total Cats: 0
Supercharged Car Suddenly Falls Flat, Boost and AFRs Appear Normal
Last night, driving my car home, it all the sudden developed a weird issue where it would drive fine under low load but if I stepped on it and got in to boost around 3-4K, the car would fall flat in terms of power and sound like a brap brap brap. I'd let off and it would run normally again (in cruise and light acceleration). Looking at my boost gauge, boost and vac looked normal both cruising and punching it. Ditto on AFRs. Doing some reading here and elsewhere, I went the bad/clogged cat route as a likely culprit. Just got done pulling it and it looks just fine (not loose substrate, no clogs). Soooooo... any ideas?
I have not logged it yet, as I have not had time between the issue developing and now when I just pulled the cat. Current plan is to reinstall the cat (RTV curing as I type this) and try driving it again and log it and see if that tells me anything. I've heard that every once in a while MS can have issues an need a restart, so maybe it will self fix over night (I know that is not likely).
FWIW, my set up is:
1.6 w/ M45
Non-intercooled 8 psi.
MS2 PNP (AFM delete)
RX8 Yellow injectors
Last edited by Adam777; 09-22-2016 at 11:05 PM.