S13 KA hesitation at WOT

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Fidelity101
Posts: 109
Joined: Sat May 01, 2004 6:57 am
Car: 1993 240sx fastback

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I've been seeing a common problem with others but I can't figure out exatly what is wrong, I step on it in 1st gear and dont go really anywhere, but I see my RPMs fly.

to clarify:DOHC 93 110k milesintake3" catco catRS*R ex mag

it pulls fine in the low end but when I hit like 3000 or 3500RPM at WOT it just feels like the car slows down and I can feel the car go no where and almost jerk at time cause it picks up some horsepower then it drops it off again through out the rest of the powerband

I get the same power at light throttle it seems than I do at WOT

what i changed and didnt help.NGK iridium IX plugs, NGK wires, new 02 sensor

so my question is what the hell should I do?replace the TPS sensor?throw some seafoam through the intake (to help clean the maf too?)check the timing?

I always have to change something on this damn car when I wanna upgrade something else...

and this would explain that the lack of power having my friends tibby almost beat me and he has a full intake and exhaust on it.


NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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have you checked for codes?

Fidelity101
Posts: 109
Joined: Sat May 01, 2004 6:57 am
Car: 1993 240sx fastback

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no, how do I pull it on OBDI?

I really should though...

I have an OBDII scanner via my friend, but its OBDII...

oh and i have a new 300zx fuel filter too.

NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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go to 240sx.org and look in the FAQ section, it gives a detailed walk thru on how to do it. Its under engine codes DOHC

Fidelity101
Posts: 109
Joined: Sat May 01, 2004 6:57 am
Car: 1993 240sx fastback

Post

NISTECH wrote:go to 240sx.org and look in the FAQ section, it gives a detailed walk thru on how to do it. Its under engine codes DOHC
I didn't see it, it was only for S14.

NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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