Need Help With R32 Rb20Det

[overclocked23]

hi i really need some help this is doing my head in , i have a r32 with a rb20det had just devoloped a very annoying issue all the car has is a frount mount , 3" exhaust ,dumppipe, 3 month old walbro fuel pump ,full service but gear box oil , now the problem lol ,i warm the car up every morning sounds like a slight miss at idle never affected it befor now the problem is i take off and the car is surging like its dying seems like no fuel then driving around it surges sometimes when you put your foot flat it dies , i come to a set of lights it dies then i start it and it will stall again does this about 2-3 times then will start have to rev it up a bit to get it going going at a constant speed of say 80kmhs and you can feel a slight surging went up a lillte hil and stalled , has fuel have checked the fuel filter clean still had fuel pump out filter element clean checked fuel pressure at idle 41psi the walbro pump when was new had a loud winding now its quiet , have cleaned the AFM out cleaned the acc i think its called any idears would be nice thanks

[r32gtstJ]

hi, sorry to hear about your problem, my gtst had a similar problem months back and

the cause was the faulty cam angle sensor, AFM and ignition amp (module)

check those out, hope it helps.

[nelsonmxmarc]

Ya, as stated, CAS or AFM, 100%. My friend had this with his GTR, ended up being one MAF was shot.. Even after resoldering etc, the thermister had had it.

CAS along with TPS can be typically faulty around the 60-80,000 km mark

[BOOZTJUNKEY]

I'm so glad you posted this topic cause my car has started with a similar issue I have suspected my cas to befaulty since I've had the car I've always had a pop on idle Which has goten worse over the past 3months to the point where it today started to hardly idle it idles round .500rpm and pop and misses and border line stalls and the miss seems to come go also which I could not understand and if I drive hard while it's running funny it pings it head off literally i have i have been dumfounded for the last couple of months with this issues i have changed injectors three times have cleaned the aac and afm which didn't really help at all changed the fuel pump removed aftermarket fuel regs changed fuel lines with no change i finally borrowed a cas off my mate and it didnt pop at all but when I drove hard a had flat spots all thru the revs which I think maybe cause the ecu mayneed to be remapped cause it's ran poorly for so long can any one confirm this?