Rb20det Missing At 3k Free Reving? And Running Bad.

[slyr32]

hey guys i am in need of help!!!

my situation is, put an rb20det in to my r31 skyline, started it all ok, once everything was done and ready to drive still all ok and then about a month into it the car starts running really bad. Looked on the forums for the problems i was having and nothing seemed to work. when car is free reving it seems to miss at about 3000RPM and when under load and about to come on boost the car seams like it stops and picks up again. But some times the car runs as if nothings wrong but most of the time runs like crap.

things i have done and checked:

replaced plugs

checked coils and replaced as they looked stuffed. the ones that i put in were from an rb20 but they were spring type and the ones that were on the car were a pin type. would they still work fine??

checked cas and timing all ok.

was just wondering could a stuffed AFM cause this sort of a problem??

any help would be much appriciated.

[DVS JEZ]

Definately try another air flow meter

[talky]

doubt its the air flow meter my casr dose the same thing changed my afm......car still runs like shit no body seem to know gonna take it to my tuner see if he can work it out..best of luck mate

[geraus]

main things:

coil packs, injectors/plugs

AFM

CAS

O2 sensor

and your wiring/ecu open ecu and check for burnt tracks

because my friend Andwoo put in his rb20 in his s13 and had the same problems...

also check Voltage when car is running

is your car running atmo bov? or returne...

[talky]

id also check the tps man

[slyr32]

main things:

coil packs, injectors/plugs

AFM

CAS

O2 sensor

and your wiring/ecu open ecu and check for burnt tracks

because my friend Andwoo put in his rb20 in his s13 and had the same problems...

also check Voltage when car is running

is your car running atmo bov? or returne...

cheers mate i have changes plugs, coilpacks, checked timing with timing light but didnt check CAS! if timing is ok can CAS still be f**ked? i also tried another ECU was does the O2 sensor do? i didnt think that would affect it!

[slyr32]

cheers mate i have changes plugs, coilpacks, checked timing with timing light but didnt check CAS! if timing is ok can CAS still be f**ked? i also tried another ECU was does the O2 sensor do? i didnt think that would affect it!

the car is running standard plumb back BOV for roady ill check the voltage too!