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Slight hesitation at about 2000rpm when cold 

 

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 Post subject: Slight hesitation at about 2000rpm when cold
Posted: Thu Oct 06, 2011 11:41 pm 
Getting Side Ways
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Age: 32

Posts: 591

Joined: 28th May 2011

Gallery: 4 images

Ride: EF Futura DUH

Location: central coast
NSW, Australia

I have just completed a quite an extesive rebuild on my 6cyl EF, Before and now even after the rebuild I am getting a slight (sometimes quite bad) hesitation while accelerating at roughly 2000rpm then after a couple of seconds it kicks in.

Now I have retained only a few things from the original engine (injectors, inlet manifold, fuel pressure regulator, MAP sensor) but all sensors and electrics (on engine) are new.
Fuel Pump is only new aswell.

My suspicions are injectors or MAP.

Any ideas??

 

_________________

1996 EF Futura factory manual
Fully rebuilt engine,Decked, Honed, Bored, Tolerences spot on, Wade 1673, Extractors, 2.5" zorst, 3" CAI, High flow filter, Exedy sports tuff clutch, Chiptorque tune.
Future Mods: A mortgage...

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 Post subject: Re: Slight hesitation at about 2000rpm when cold
Posted: Fri Oct 07, 2011 12:26 am 
Oompa Loompa
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Age: 28

Posts: 20

Joined: 25th Apr 2010

Ride: EL Falcon

Location: Rockingham
WA, Australia

how is the dizzy? rotor button both the contact inside and on top. dizzy cap centre contact
plus 6 contacts also leads test and check for breakes, earthing out while running see a spark...
also tpi shake the wires while car running.. if the tpi is playing up that will normal show it.
if it was fuel it would do it all the time.... the map is a good ghess too. clean vac tube and
test with known work map...
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 Post subject: Re: Slight hesitation at about 2000rpm when cold
Posted: Fri Oct 07, 2011 9:59 am 
Getting Side Ways
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User avatar

Age: 32

Posts: 591

Joined: 28th May 2011

Gallery: 4 images

Ride: EF Futura DUH

Location: central coast
NSW, Australia

l0stwhite wrote:
how is the dizzy? rotor button both the contact inside and on top. dizzy cap centre contact
plus 6 contacts also leads test and check for breakes, earthing out while running see a spark...
also tpi shake the wires while car running.. if the tpi is playing up that will normal show it.
if it was fuel it would do it all the time.... the map is a good ghess too. clean vac tube and
test with known work map...

Dont have a Dizzy.. Cheers anyway.
uniacidz wrote:
Sounds like fun im having.

Old original EL XR6 injectors i had, had a small stutter at 2250rpm or so on cold start.

Using AU Xr6 injectors, cold start and have a hesitation upon putting foot on accelerator. once its not stone cold car is fine.

Go figure. I stopped chasing it.


Well its just one of those annoying things I guess.. I will probs swap out the MAP and some other things from my girlfriends EF next weekend and see if I find the issue.

 

_________________

1996 EF Futura factory manual
Fully rebuilt engine,Decked, Honed, Bored, Tolerences spot on, Wade 1673, Extractors, 2.5" zorst, 3" CAI, High flow filter, Exedy sports tuff clutch, Chiptorque tune.
Future Mods: A mortgage...

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