rb20 stalling

[Rb20 problems]

ok so ill be driving for like 10 min it will be fine and the after that ill push the clutch in and it almost dies ,it will rev twice then come back to normal idle . anybody know whats goin on

[Yellow4g63]

is the bov been vented back into the intake tube or vented to atmosphere?

[Rb20 problems]

im pretty sure it wasn't ,its got a hks ssqv3 its just hooked up like normal and even if it was I wouldn't kno how to tell if it was. btw thanks yellow4g63 for all your help , I haven't got to the cold start thing yet because of work but ill start soon

[USMCgetsome]

check for vacuum leaks(intercooler piping and couplers and old hoses) Check maf voltage and fuel pressure

[USMCgetsome]

also google hks bov recir adapter or routing to get that answer.

[Rb20 problems]

ok so I tightened all tubes and pipes ,maf is putting out fine and its still doing it. what els could it be, temp sensor gone bad?

[USMCgetsome]

3 main things I know of kill the engine like that

slowly dying fuel pump
coolant temp sensor bad for cold starts
slowy dying MAF

and of course terrible vacuum leaks and blown piston rings

[lexcrob]

You have to recirc your bov unless you go to a map based system like aem standalone. Only other option is to go to a blow through maf where you just mount maf in the intercooler piping post turbo.

Id recommend just getting ahold of a dsm "bypass valve" cheap and same part that comes stock.


After that is resolved its kind of a process to get it to run perfect.

Assuming you have no vacuum or boost leaks you would bring engine to temp. Turn off vehicle. Disconnect the idle air sensor on rear of engine. Disconnect the tps connector. There is two connectors for tps"" one for off idle switch and one for tps. Next you will get a multimeter and verify your idle switch is adjusted properly. Its just a open close sensor not a potentiometer like the tps. After that is set you start engine. Then adjust your idle speed set screw on the back of the engine. After you get it close to 800rpm you set timing with a timing light to base timing. If you notice engine speed changes with base timing. Its a bit of a back and forth mix. *** Normally the idle set screw will end up 2 flats back from clockwise stop. (turn it all the way in back out 360 degrees or one full turn)

Then turn of engine reconnect sensors disconnect battery and arch terminals together for 10 seconds disconnected. Reconnect and go for a drive. Should run like a champ. If problems are still not resolved then you back to check engine codes/vacuum leak/boost leak/fuel pressure/bad coil or multiple/malfunctioning sensor...



Good Luck!