I bought an r34 gtt sedan maybe about 6 months ago now and its been a daily ever since. Its been a dream and I'm in love with the car but its got a couple off issues my main concern being its fuel consumption , I had previously owned an NA r34 sedan which got about 13.33L to 100kms and when i sold my na for my new turbo 34 which gets 19.50L to 100kms i thought it was a bit heavy but its turbo so what can I expect? but now after reading a few posts here it seems i should be getting at a minimum of 15L to 100kms out of a tank when im lucky to get 19L per 100km especially considering how stock it is and my fuel consumption is on par with 400kw rb's
Only mod is a blitz return flow fmic which was installed prior to me purchasing the car and a decat. - Stock op6 , haven't pulled it off so haven't had a chance to see if there's any play or if its been high flowed
I have replaced/changed all the easy stuff, spark plugs , oil change, fuel filter , new 02 sensor
Not really sure where to go from here.
The people I bought it off told me when they bought it it had a full exhaust system , screamer pipe , the fmic and a pod filter. My theory was that it was tuned and then when I put everything back to stock the ecu didn't know what to do as it would be alot more restrictive? But then I hit 180 and it cut my fuel which then makes me think its never been tuned and is still running the stock map?
Its a stock head to as Ive done the rocker cover gaskets and there was absolutely nothing special there.
Im thinking its either leaking or bad injectors or possibly something to do with the fmic as it could be taking in a lot more air?
Any suggestions or ideas greatly appreciated
On a side note my house mate who has a very similar dead stock 34 GTT’s turbo barely makes any whine or spool noise vs mine is loud as f**k compared.
We put this down to the fact mines auto and his is manual. And when we went to a drag and raced side by side we were both neck and neck no difference in power at all