Nissan Data Scan Help

[YCOPY]

Hey all,

I need some advice /assistance...

I have been having an issue lately that when i plant my foot on the accelerator the car hesitates, it kind of thinks about going for a split second then takes off. i can ease the pedal down and the car goes fine.

Its very intermittent, i have cleaned the AFM,New plugs gapped at 0.8,clean the aac valve, throttle body, Injectors serviced last week.

I’m using data scan to check what’s going on but im getting strange readings..

Cars timing set to 15BTDC (tps,aac disconnected) checked this with timing light.

The data scan reads zero timing...and if i hit base idle adjustment its then forced to 15degres and the car is revving at 1500+rpm and if i check the timing marks with the light they are 30degres+

Im thinking maybe a fault with the cas,fuel pump or fuel pressure..

Anyone got any ideas??

Car -

R33gtst

Fmic

Full 3" Zorst

Splifire coils

Std Motor / Turbo

7lbs boost

Chipped / non chipped STD ECU (tested on both)

Thanks,

Scott

[YCOPY]

ok so quick update...

cars timing is ok for the first few seconds after starting up..less than 10 sec's then yer..it just drops to 0 and bounces to 3 and back.

Any ideas?

[Adriano]

Sounds like tps or idle soleniod, its not going into the idle map, and the ecu is retarding the timing to try to make it idle.

[YCOPY]

Sounds like tps or idle soleniod, its not going into the idle map, and the ecu is retarding the timing to try to make it idle.

Looking at the Throttle measurment through data scan gives me 0.18 on idel..im assuming thats volts?

Is this the correct value?

should i test using a multi meter?

[YCOPY]

Sounds like tps or idle soleniod, its not going into the idle map, and the ecu is retarding the timing to try to make it idle.

Ok..Buy this man a beer

TPS voltage was 0.2v instead or 0.4v @idle

Idle Soleniod seems to be faulty (sprayed it with some freeze spray) and it seems to all work fine till it got warm again. time to replace me thinks...

Thanks,

Scotty

Edited April 23, 2008 by chippagti