Fordmods Logo

Revs really slow to drop on EF 

 

Page 1 of 1 [ 10 posts ] 

 
 Post subject: Revs really slow to drop on EF
Posted: Wed Jun 15, 2005 11:30 pm 
Tyre Shredder
Offline
User avatar

Age: 39

Posts: 371

Joined: 28th Jan 2005

Ride: EF Fairmont

Location: Perth
WA, Australia

Got a EF fairmont, with 5 spd, and a AU engine in it, and for some reason the revs are really really slow to drop. cleaned the isc and tb and made no diff, reset the computer numerous times still no diff. I even fitted the stock intake and filter back on and still have the same prob (cos i got a 3" intake pipe with a K&N filter)

its weird cos u can pull up put it in neutral and the revs will sometimes take from 5 to 10 seconds to drop from 2000rpm. and the idle can be normal sometimes at 750rpm and for no reason go to 1000 or even 1200rpm.

im goin to take it to ford on the weekend and plug it in to see if there is some error codes in the system but does anyone else have any ideas that might fix the prob?

(dont have a cam or aftermarket chip in it, apart from intake and zorst and diff engine its stock)

 

_________________

EF XR8 - 5speed, Extractors & Exhaust

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 12:34 am 
Getting Side Ways
Offline
User avatar

Age: 39

Posts: 927

Joined: 6th Nov 2004

Ride: BA Falcon EGas

Location: Perth
WA, Australia

Welcome to the world of the s**t ford ecu. Mine does the same and the solution is drilling a hole in the Idle control (ask jonno).

Or use it as an excuse to get a new pooter.

 

_________________

BA Falcon Futura on EGas. Stock as...

EF 5 speed manual; PH 4480 Pacemaker Headers; 2 1/2" Lukey Mandrel Bent System; Hi Flow Walker Cat; Stage 3 Crow Cam; ChipTorque Chip; 3" Mandrel Bent Intake; K&N Pod Filter; Low Pedders Suspension; 17" EL GT Champagne Rims; RPM Series Clutch

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 12:37 am 
Getting Side Ways
Offline
User avatar

Posts: 3115

Joined: 20th Dec 2004

Ride: Falcon

Location: Adelaide
SA, Australia

I would say it is running the auto computer, which is programmed not to drop revs of as fast as the manual (it is expecting the auto bux to be dragging the revs down as well). I was running an auto ecu while shopping around for a manual and it behaved the same

 

_________________

Stoke me a clipper, I'll be back for Christmas

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 1:00 am 
Technical Contributor
Offline
User avatar

Age: 38

Posts: 3097

Joined: 5th Nov 2004

Gallery: 29 images

Ride: VU SS

Location: Ivanhoe
NSW, Australia

I have this problem and I have a Manual ECU.

My solution was to put the ISC on a switch, and once the car is warmed up I just don't use it at all. Idle is rock solid steady.

 

_________________

EF Fairmont now Sold!
Guides: Polishing|Modifications |Manual Conversion

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 1:02 am 
Tyre Shredder
Offline
User avatar

Age: 39

Posts: 371

Joined: 28th Jan 2005

Ride: EF Fairmont

Location: Perth
WA, Australia

i got a manual ecu in it...

voxace... which wire did u wire the switch into...???

 

_________________

EF XR8 - 5speed, Extractors & Exhaust

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 1:03 am 
Technical Contributor
Offline
User avatar

Age: 59

Posts: 5659

Joined: 14th Jan 2005

Gallery: 10 images

Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

stockstandard wrote:
I would say it is running the auto computer, which is programmed not to drop revs of as fast as the manual (it is expecting the auto bux to be dragging the revs down as well). I was running an auto ecu while shopping around for a manual and it behaved the same
Yeah, the idle in my ute seems to act similar - drifting at different revs. Checked idle settings, cleaned ISC, etc. When doing an ECU diagnostic, code 786 Economy Indicator Lamp is always there (puzzling as it's a factory manual), despite resetting the error codes. As far as I know the car is original, but I suppose Ford could've thrown in an auto one at assy time.

 

_________________

96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 1:08 am 
Getting Side Ways
Offline
User avatar

Posts: 3115

Joined: 20th Dec 2004

Ride: Falcon

Location: Adelaide
SA, Australia

If it is just the ISC being over active you can put a thin metal plate with a couple of 3mm holes drilled at the inlet and outlet holes between the ISC and the throttle body. It lets the ISC still control the idle speed - but only over a small rev range (around 500rpm) instead of a few thousand rpm.

 

_________________

Stoke me a clipper, I'll be back for Christmas

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 1:14 am 
Technical Contributor
Offline
User avatar

Age: 38

Posts: 3097

Joined: 5th Nov 2004

Gallery: 29 images

Ride: VU SS

Location: Ivanhoe
NSW, Australia

The_Jackal wrote:
i got a manual ecu in it...

voxace... which wire did u wire the switch into...???


Just any one of the ones going to the ISC, or find which one it is at the ECU.

 

_________________

EF Fairmont now Sold!
Guides: Polishing|Modifications |Manual Conversion

Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 3:09 pm 
Getting Side Ways
Offline

Posts: 1687

Joined: 5th Nov 2004

Gallery: 5 images

Ride: 1994 ED Ricer

Location: Perth
WA, Australia

yeah i had that problem
and i disconnected the ISC compelty.

the only con is it acts like a carby car when cold.
Top
 Profile  
 
 
Posted: Thu Jun 16, 2005 3:56 pm 
Fordmods Newbie
Offline

Age: 45

Posts: 4

Joined: 16th Jun 2005

Ride: ef xr6

Location: Albany
WA, Australia

hey all, had the same prob in my ef, 5 speed. after 3 days at the mechanics they finally figured that the idle speed thingy was buggered put in a second hand one.. runs sweet as now!!! :lol:
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 10 posts ] 

Who is online

Users browsing this forum: Google Adsense [Bot] and 59 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Fri Mar 29, 2024 9:26 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names