RU55SH

ok i will check cooler pipes again and vac lines.. will have to have a look on here about the tps and ignition timing as not too sure about it.. can the tps or ignition just suddenly change or stop working properly.. thankyou for the reply aswel

hey everybody.. I have a 1994 r33 gtst and I'm having a major idle problem.. idles fine while it's cold but once it warms up it starts hunting up and down, comes up to about 1200-1500 rpm then drops to almost nothing car shudders an shakes and just about stalls.. also noticed that when i drove it up the street and back it did not like to get up on boost, was very hesitant.. did boost but was hesitant! I have cleaned the AAC valve about 3 times, cleaned the afm, changed the plugs, checked for vaccume leaks ( pretty sure there aren't any ) put new fresh caltex premium fuel in it but it still hates me.. checked the error codes and got 55 which I'm led to believe means all ok.. mods that are done is just an Apexi cat back, plasmaman front mount and hks bov.. also read that alot of people have trouble with aftermarket bovs so put stock one back on.. have searched and searched but can't seem to find much except cleaning the AAC valve etc which hasn't helped so i hope someone here may be able to help.. would love to be able to drive again.. thank you

na mate using an aftermarket guage one on the dash is disconnected.. and the cas appears to be fine.. i am starting to stress out cos i cant figure it out lol and being on the coast i dont know what shop i can take it too.. i did take my cars to the throttle shop at gosford but they are gone now

also were would i look for the cas so i can check it

hey mate i just held it on for like a min and its a big compressor that runs my whole shop i assume the pressure was really high tho.. i swapped the coolant temp sensor and it seems to be running fine all the way through the revs @ 5psi but as soon as i switch it to 9psi it boosts up and then cuts just as the guage hits 9psi.. any chance it may be a dodgy stock fuel pressure regulator or even a tired fuel pump

ok so i pressurised the pipe work and no leaks.. disconnected all the avcr gear and its a bit better n standard boost but is still really laggy!! any other help would be great tryin to fix it all up be4 my sisters formal next week

thats what i thought also but can seem to visually find any loose piping or worn silicone joins or clamps, it does get up on boost sometimes but its very hard to get it there.. may have a try at presurising it tomos and see how that goes.. just took it for a drive then and after i try give it a bit of gas and back off throttle while getting on the clutch it wants to stall and sometimes does stall.. and its still idleing very rough any other ideas anyone

hey guys.. i have an r33 s1 gtst with the rb25det in it.. the car has an apexi n1 exhaust, frontmount cooler done by plazmaman, splitfire coil packs and an apexi avcr which just died (havnt worked out why yet but happened after the car got these next problems).. it has recently developed a problem out of nowhere and is running really rich i think (black crap all ova back of the car that it never used to get) but it will not boost properly, it hesitates badly or just cuts out altogether untill i let my foot back off the gas and is slowly getting worse, now it is gettin hard to drive off boost and its even starting to idle funny.. can anyone please help i dnt want to pay a performance shop if i can help it..