fuel questions

[route]

Alright, now when i rev for example on 3rd gear, i'm experiencing pull backs.
like not enough fuel kinda feeling.
rpm will go smoothly to like 2.5 then sudden pull back feeling and it will drop before going back to 2.6...
have no idea what is wrong, suspect is my fuel pressure.
what will help ? bigger fuel pump ? injectors ? fuel regulator ?
any advice would be appreciated. thanks :)

 

[Cheong Mou Kei 4G9XT]

weak fuel pump o cloged fuel line, fuel filter

 

[boyzone]

check on ur fuel filter and injector first ... with the minor modification on ur car, oem pump still able to support .

 

[InitialD]

Does it jerks? Does it stutter? It could be water in the fuel system

 

[route]

thanks to all for the reply, will check those out tomorrow. :)

thanks again.

initiald, yes it does kinda jerk back

 

[apisanif]

same prob with me lorr...

 

[m a v [3] r i c k]

hi guys
i think im experiencing similar problem. it happens after i've travelled for a while. example of the situation is like when i boost around it was ok for the 1st few times. after that it will start to have this kinda feeling where theres no fuel delivery. and its okay again if i let the car rest for about 1-2hours. then if i boost around again will get the same problem. when the problem occur, even at stand still, i've tried throttling at about 50% and the rev will go up till about 3-4krpm then will be a silent moment. as if the engine is dead or something. and after about 0.5 to 1 second then the rev will go up again. it happens after the car has been running for a while or hard driving for a very short period. changed the petrol filter 2 times already, cleaned the fuel pump filter and the fuel line as well. is it possible that this is cause by fuel pump not functioning properly? air flow sensor? injectors? ECU? im running a vr4 in standard boost.

p/s :- i've accidentally used a given rusted fuel tank by a bloody halfcut shop in puchong where i got my halfcut from. now im already on a new tank and checked the inside is clean.