sudden deceleration when accelerator is released

[azn_007]

as stated above after driving to queensland and back, every time the accelerator is released my body moves forward, this is particularly strong in forth gear, the feeling is similar to when i accelerate hard in 1st and then step on the clutch to grab second. anyone have a clue to what is wrong?

[Dillzio]

Is your fuel economy effected? If it is, there may be something slowing your running gear down, like brakes or a dodgy wheel bearing or something like that. It could be a stuck brake pad, a misadjusted handbrake cable, or maybe fishing line or wire or something wrapped around your tailshaft or diff.

[Big_Valven]

Is your handbrake on?

Couldn't help myself :jester:

[kart_racer]

Engine compression? I.e. not used to driving a high compression/ high capacity manual?

[azn_007]

thx for the replies the fuel consumption dont seem to be affected i mean 11.3l for all 2200kms with aircon on all the way i will check for debris in the tailshaft and diff

[bpm]

does your inst. fuel readout read 0.0l/100km when you back off? its not just dfco kicking in?

[azn_007]

i dont have a instantaneous fuel consumption readout so i dont know

[Souljah]

i dont have a instantaneous fuel consumption readout so i dont know
Hold down mode & set while you start your car. Then use mode to cycle through the menu till you get to the Instantanious fuel read out. ;)

[VNV8]

sorry but whats dfco?

[BennyMac]

sorry but whats dfco?

I will have a stab. DFCO=Direct Fuel Cut Off

Benjamin:)

[Chris350]

Is your handbrake on?

Couldn't help myself :jester:
:rofl: haha i was gunna say the same thing

[JezzaB]

sorry but whats dfco?

Deceleration Fuel Cut Off

Bit of an explanation:

Deceleration fuel cut-off, cuts fuel using two methods:
1. under low load coasting conditions, eg, in gear coasting down a hill.
2. on Manual (M6) equipped cars where the fuel may be very quickly shutoff during gearshifts, this is called DFCO M6.

We dont use DFCO M6 in our cars

Jez

[LSX-438]

sounds odd, perhaps check out your throttle body carefully. do you have a tune? possible throttle follower calibration seriously out of whack? how long has it been like this (always or just now?) questions questions!

[azn_007]

the car has had a mafless tune and this has only been occurred recently

[iamhappy46]

Dirty air filter or blockage in the exhaust?

[BennyMac]

Deceleration Fuel Cut Off
Jez

:teach: Thats what i ment :burnout:

Benjamin :)

[azn_007]

ok i cleaned my k&n air filter today will fit tomorrow and see how i go