what resistors do i use , i got the 10 watt 10 ohm resistors wired in , and as soon as i go full throttle the car falls on its face, any suggetions??
tia
jonathan

 

ttt

 

ttt

 

How much of a cut are you running and at what RPMs?

 

what do you mean by cut??
ive noticed something else to , my car will idle perfecrtley fine without pulling any fuel out ..why is that???
jonathan

 

By cut I mean what percentage reduction in fuel are you running and at what RPM? I assume you are using DSM 450cc injectors.

At idle you are going to be in closed loop so your o2 sensor and ECU are compensating for the larger injectors although I would venture you are running pretty rich at idle. Also larger injectors take longer to open so you don;t get as much fuel out of them as you would think for short pulsewidths.

 

o k i gotcha, im runnin - 36 across the board, and as soon as i go full throttle my a/f gauge goes completely red and its start to stumble
thanks
jonathan

 

They are DSM 450cc injectors correct? Because if you ran a high impedance injector with resistors they might not open all the way.

Red means lean on your A/F right? Try adding a little more fuel, the response of a narrow band A/F gauge isn't linear though so you just want enough to tip you over towards rich and it will occur pretty suddenly.

Also have you messed with the TPS sensor at all with your VAFC?

 

hey whats up , i was using my friends username earlier, yes they are dsm 450's, no i havent messed with the tps sensor with the vafc
tia
jonathan


[Modified by JonathanH, 4:26 AM 11/7/2002]

 

Beats me then. I take back what I said earlier, -35% should be plenty of fuel, Maybe a dirty/clogged injector, low fuel pressure, overboosting.

 

Get a wideband sensor to read ure a/f ratios.

 

if u are using hi imp injectors you dont need the resistor

 

how do i know if i am using high impendence injectors, ???
i pulled themn out the other day , now im gonna attemp to put them back in ,thanks for any help
jonathan

 

ttt