P30ECU

I have a b16a with a JRSC on it. Once my car begins to boost, my motor begins to jerk around and wants to die. This only happens if I push the SC to boost. Any ideas?

EITCP

MAP sensor problems or wrong A/F ratio.

which kit do you have? Base one with FMU?

SovXietday

Do you have either the pressure switch or the map controller hooked up on it? Or are you running with a chipped ecu/standalone.

gitwidit

not enough information, list your entire setup please.

P30ECU

I have a base model JRSC (8pounds) on a B16A2. Everything is installed correctly. I'm running an apex exhaust and header, stock motor, and I have had my motor dino tuned using a program similar to hon-data. Everything worked well for a few months and now I'm having this problem.
I have looked for boost leaks, checked the O2 sensor, map sensor, replaced the idle valve sensor, spark plugs, coolent, oil, etc..... Any new ideas would be great!

mestizo

this is going to sound really stupid but pull the JR FMU out and try it using the stock fuel pressure regulator only, just run it up to boost and see if it does the same thing, if it doesn't then the FMU is ur problem. The reason I say this is 3 different JRSC setups I have installed all have had problems when getting into boost where they would sputter, in every case it was the FMU making way too much fuel pressure making the engine sputter as it came into boost.

SoEvoL

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P30ECU &raquo;</TD></TR><TR><TD CLASS="quote">I have a b16a with a JRSC on it. Once my car begins to boost, my motor begins to jerk around and wants to die. This only happens if I push the SC to boost. Any ideas?</TD></TR></TABLE>

sounds like your car isnt reading its in boost

P30ECU

Thanks...I'll give a try.