Thread: Delay in throttle response from idle

My car has done this ever since I first got it in stock condition. When idling if I quickly hit the throttle there is a second or so delay before the rpms come up. When watching my boost gauge the needle rises instantly from where it sits at vacuum to the zero range, then the rpms follow. Basically the needle moves at the same time that the throttle does then the rpms follow suit.

I have been told before this may be related to a boost leak but the last check I did it held 18psi. Any ideas?

Probably normal.. Have you compared it to another stock dsm? They have pretty heavy flywheels and miles of pipe for intake air to flow through.. that and your turbo doesnt build boost instantly..

Its pretty normal for a stock dsm to have really crappy throttle response compared to most NA 4 bangers..

Originally Posted by BenGSX

Probably normal.. Have you compared it to another stock dsm? They have pretty heavy flywheels and miles of pipe for intake air to flow through.. that and your turbo doesnt build boost instantly..

Its pretty normal for a stock dsm to have really crappy throttle response compared to most NA 4 bangers..

I know what your saying here but its not exactly what I tried to describe. I understand about all of the extra piping causing pressure drop and the turbo needing to spool. I didnt however take into account the flywheel weight, isnt it around 19lbs ? :shock: I had a WRX with the stock TMIC (which might explain it) but it never seemed like there was a delay after hitting the throttle. The delay happens when blipping the throttle from idle while in neutral. I'm not talking about driving and turbo lag, I'm used to that now I havent compared mine to any other dsm's, maybe its normal. Probably just another dsm quirck.

Eh.. untill theyre heavily modified DSM's dont do throttle blipping :)

My car has some pretty good throttle response now but it took alot of rotational inertia reduction and god only knows what all else contributed..

(I have a 7lb flywheel.. No balance shafts.. No AC.. and a whole bunch of other crap..)

But the coupla stock turbo DSM's ive owned along with the rest ive driven didnt react much to "blipping" the throttle..

do you have a rewired fuel pump yet?

maybe you should post a log of it when it does it.