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Rb25 Feels Doughy

kevlo948

By kevlo948,
in Engines & Forced Induction

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kevlo948 Contributor

kevlo948

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Posted

Hi guys need a little advice. A couple days ago i gave the car a bit of stick with about a quarter tank of fuel and upon getting higher in the rev range the car cut out completely. Ever since then the car has felt noticeably more "doughy". The throttle response isnt as good and it doesnt hit boost as hard. Car still runs smoothly however recent events have got me wondering.

Bit of history on the car, its running a Haltech Platinum Pro, GT3071r, 550cc nismo injectors, profec 2 ebc, fuel pump, splitfire coilpacks etc. Note that its a MAP sensor ecu so theres no AFM. Oh and its a series 2 r33.

The car also has issues with cold and hot starts. On cold starts it will fire up nicely then choke and it wont start smoothly unless i bleep the throttle. On hot starts, it will struggle to start up often needing a bleep of the throttle. My thinking is that these startup issues are due to the tune needing touch up?

Do you guys have any idea as to what may be going on with regards to the start up issues but more importantly why the car feels so doughy and why it cut out that night??? Is it worth taking back to the tuner to sort it out??

Appreciate any help that may come my way!

Cheers

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https://www.sau.com.au/forums/topic/427975-rb25-feels-doughy/
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AngryRB Grand Master

AngryRB

Posted
Posted

ive been battling the same issues, try some Carby cleaner ( obviously not round electrical or exhaust parts) around the plenum and silicon joins, also can do a pressure check, see Hanaldo's build for smoke test

kevlo948 Contributor

kevlo948

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Posted

Thanks for the replies guys! I've just flown back up to work but before I left I changed all the spark plugs, tightened up all my piping and sprayed some carby cleaner into the throttle body. It's definately helped a bit.

Hopefully it stays this way.

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