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Annoying surge on deceleration 

 

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 Post subject: Re: Annoying surge on deceleration
Posted: Sun May 01, 2011 12:46 pm 
Getting Side Ways
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ToranaGuy wrote:
Around idle that thing smelt way rich, so a J3 to lean the bottom end out wouldn't be a bad thing at all......

Cheers

ToranaGuy


yeh i did see that Jay. looked back and i had covered the mightyboy in petrol smoke lol. i dunno why it's overfueling though. i put the standard FPR on it

 

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 Post subject: Re: Annoying surge on deceleration
Posted: Sun May 01, 2011 1:29 pm 
Getting Side Ways
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Not enough vac down low to keep the reg open & flowing fuel back to the tank, causing pressure to rise & it will be injecting more fuel?

Cheers

ToranaGuy

 

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 Post subject: Re: Annoying surge on deceleration
Posted: Sun May 01, 2011 1:53 pm 
Getting Side Ways
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Find a workshop with a gas analiser and get a idle test and a cruise test done.
Will let you know just how much its overfueling and will narrow down the places to look for a fix.
My eb at idle runs at 88% and at cruise 95% effieciancy. About what you should expect.
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 Post subject: Re: Annoying surge on deceleration
Posted: Sun May 01, 2011 6:07 pm 
Getting Side Ways
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oh yeh. i'll have a look for a workshop

yeh Jay. sounds about right

 

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Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw.
Weekend car: AU2 "XR8" 220kw 5L 5 speed. 19" BBS LM . Full exhaust. Lowered on Kings and Koni's. 13.8@97mph
Fast car: EA SVO AU motor. Built BTR. SDE 3500 stall. 76mm turbo. On E85. approx 425rwkw. 10.8@126mph

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 Post subject: Re: Annoying surge on deceleration
Posted: Mon May 02, 2011 11:39 am 
Getting Side Ways
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NSW, Australia

Yea might have to go to a dealership. Gas benches arnt cheap.
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 Post subject: Re: Annoying surge on deceleration
Posted: Mon May 02, 2011 3:17 pm 
Getting Side Ways
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How long have you been a mechanic for wildeb?
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 Post subject: Re: Annoying surge on deceleration
Posted: Mon May 02, 2011 6:30 pm 
Getting Side Ways
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4.5 years. but been around it for all my life.
i work at a dealership. no gas analyser

 

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Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw.
Weekend car: AU2 "XR8" 220kw 5L 5 speed. 19" BBS LM . Full exhaust. Lowered on Kings and Koni's. 13.8@97mph
Fast car: EA SVO AU motor. Built BTR. SDE 3500 stall. 76mm turbo. On E85. approx 425rwkw. 10.8@126mph

Top
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 Post subject: Re: Annoying surge on deceleration
Posted: Tue May 03, 2011 8:13 am 
Getting Side Ways
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Age: 33

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Joined: 4th Sep 2009

Ride: 92 EB s

Location: DORRIGO
NSW, Australia

Yep fair enough mate.
I reckon everyshop should have one. Saves so much time.
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 Post subject: Re: Annoying surge on deceleration
Posted: Tue May 03, 2011 8:16 am 
Getting Side Ways
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Ride: EA SVO, AU2, Toyota Crown

Location: Bendigo
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yeh but cars these days none of that s**t is adjustable

 

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Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw.
Weekend car: AU2 "XR8" 220kw 5L 5 speed. 19" BBS LM . Full exhaust. Lowered on Kings and Koni's. 13.8@97mph
Fast car: EA SVO AU motor. Built BTR. SDE 3500 stall. 76mm turbo. On E85. approx 425rwkw. 10.8@126mph

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 Post subject: Re: Annoying surge on deceleration
Posted: Mon Jul 18, 2011 9:54 pm 
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WILDEB wrote:
As some of you guys know the auto in my EB packed up after 310,000 hard kms. So i converted it to manual. I was getting a bad rev hang issue so i temporarily disconnected the ISC. But i got sick of it not idling when cold or idling up when the A/C was on or dry steering and stalling. and while the ISC was disconnected it wouldn't idle on petrol but it did on gas.

Anyway i'm rambling. Found out how to stop the rev hang, thanks TROYMAN, and fixed it on the weekend, now the idle behaves.
Now on gas it's all sweet but on petrol when to accelerate ever so slightly or you say build up revs to like 3000rpm and back off when it gets below say 2000rpm it starts to shudder/surge really badly until you put the clutch in or accerate again

what do you guys think?


So how did you fix the rev hang issue? My EF is doing the same thing after a manual conversion, i've got my ISC disconnected at the moment also to stop it doing it.
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