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ED i6 coughs/splutters around 2000 rpm 

 

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 Post subject: ED i6 coughs/splutters around 2000 rpm
Posted: Tue May 27, 2014 4:30 pm 
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Age: 23

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Joined: 27th May 2014

Ride: 93 ED Futura

Location: Perth
WA, Australia

Ok some background on my car:

-4.0l straight 6
-Manual conversion
-4499 paceys with 2.5" exhaust
-EL head with ported valves
-log manifold

My ed coughs/splutters around 2000rpm when accelerating slowly, and after 2000rpm it is much more powerful and loud.

under heavy acceleration it doesnt cough and splutter, but it feels weak in low revs and is noticebly much more powerful after 2000 rpm

does anyone know what the problem could be?
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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Tue May 27, 2014 11:48 pm 
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Location: Port Macquarie
NSW, Australia

Possibly cam timing.

 

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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Wed May 28, 2014 1:50 am 
Getting Side Ways
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First place I'd be checking over is the ignition system. Check your plugs, then measure the leads resistance. Next check the coil, cap and rotor button. Check for play in the dizzy too.

Second place I'd check is for vac leaks.

Cheers

ToranaGuy

 

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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Thu May 29, 2014 1:22 pm 
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Age: 23

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Ride: 93 ED Futura

Location: Perth
WA, Australia

ok its got new plugs, leads are fine, how would i go about checking the dizzy? its in a bit of an awkward spot under the manifold
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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Fri May 30, 2014 8:23 pm 
Getting Side Ways
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Age: 35

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Gallery: 25 images

Ride: EB2 Ghia,Mighty Boy,Eb1 Xr8 5spd

Location: ** In the Shed! **
VIC, Australia

4litr wrote:
ok its got new plugs, leads are fine, how would i go about checking the dizzy? its in a bit of an awkward spot under the manifold


You will need to probably remove the cold air intake so you can get a bit easier access, otherwise you need to go from underneath to unclip the dizzy cap & then remove it so you can see if it's any good or not and to also check the rotor button...

Cheers

ToranaGuy

 

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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Fri May 30, 2014 8:34 pm 
Getting Side Ways
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Ride: BA XR6T (mix of BA, BF and FG)

Location: Perth
WA, Australia

I had the same symptoms on my ED, turned out that I had a partially blocked injector.

It was fine on LPG, but had that flat spot on petrol.. replaced the injector and it was all good again.

might be something similar for you?
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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Tue Jun 10, 2014 7:36 pm 
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Ride: 93 ED Futura

Location: Perth
WA, Australia

turns out it was blocked injectors. cars running smoothly again. thanks guys
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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Tue Jun 10, 2014 10:38 pm 
Getting Side Ways
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Ride: BA XR6T (mix of BA, BF and FG)

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WA, Australia

4litr wrote:
turns out it was blocked injectors. cars running smoothly again. thanks guys


In my case it was caused by not running petrol enough and a bad gas backfire or two Are you running mixer style LPG ?
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 Post subject: Re: ED i6 coughs/splutters around 2000 rpm
Posted: Wed Jun 11, 2014 1:25 am 
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Ride: 93 ED Futura

Location: Perth
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frankieh wrote:
4litr wrote:
turns out it was blocked injectors. cars running smoothly again. thanks guys


In my case it was caused by not running petrol enough and a bad gas backfire or two Are you running mixer style LPG ?


no, petrol only. i was running 91 for quite a while though but now i dont get anything below 95. funnily enough some potent injector/fuel system cleaner seemed to have cleared the problem up. weird how that works
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