help me... undiadnoseable problem

[snackonjack]

ok here it is. my r32gtst is havin sum wierd power/boost problem. when cold= no boost at all, when warm=1/2 boost. my car has been at 2 different performance mechanics for a total now of 6 months. ive gone through everything from denial to depression. seems everything has been tried, afm, fuel pump, bov, ecu, temp senser, exhaust, turbo, theyve all been switched, now there looking at rewiring the bastard. has any1 had a problem like this or heard of 1. any ideas would be thanked. jack (melb)

[R31Nismoid]

where do you live?

although... i wouldnt be finding out if im making boost whilst the car is cold.

Not till im totally warm and oil pressure has dropped.

maybe leaky cooler pipe thats heating up and sealing?

[race_snooze]

how many k's on the clock, rings arnt blowing by till warm.

valves seated properly, (then there would be smoke same for above)

[blind_elk]

I, too, would not be concerned that I had no boost when the engine was cold.

Which temp sensor have you swapped? Have you fitted a larger turbo? Have you fitted a boost controller? (what is it set to?)

Also, check that the knock sensors are connected and working properly.

[paulr33]

when you say no boost as in the guage shows 0 and doesnt go above 0 vacuum or it feels like there isnt any. have you been in other r32's and felt they drive differently to yours? mine doesnt exactly fly when its cold and i drive softly till its warmed up, the maps are very different when its cold it does this on purpose to warm up and be safe. what is 1/2 boost? what psi ?

[ylwgtr2]

i could have a look at it if you like....are you anywhere near tullamarine?

[snackonjack]

hi all, sorry bout late reply. car was origionally a non turbo but had a turbo conversion in jap. seems the conversion is a bit odd as they have uses a modified non turbo loom instead of a turbo loom. car has never had boostguage only tepmorary 1's in the workshop. yes i have been in other r32gtst's and therre is no problem like this. takes bout 10 minutes to warm up and run properly. but for that 1st 10 min car just makes turbo spooling noise car drives like a riced up n/a. i have had this car for bout a year and for the first 6 months it didnt do this. pretty imbarising when i drive home a date and it only kicks in just before i drop her off. i recently moved to fitzroy from geelong., not sure if thats far from tullarmarine or not. i havnt fitted a larger turbo but changed the 1 that s on it4 a reco and it didnt make any difference. might be ok if i still lived in country but when u live in melb and 10k is the furthest u drive it sux an i get no sweet speed. thanx for ur ideass so far. anymore would be appreciated. - jack -