Fordmods Logo

HELP PLEASE : Backing Off Throttle Hicups 

 

Page 1 of 1 [ 8 posts ] 

 
 Post subject: HELP PLEASE : Backing Off Throttle Hicups
Posted: Tue Feb 13, 2007 4:24 pm 
Getting Side Ways
Offline

Age: 31

Posts: 462

Joined: 7th Apr 2005

Ride: EA

Location: Melbourne
VIC, Australia

Hey guys

Weird problem only on backing off of the throttle, the car hicups, like u no wen in 1st gear at 10 kays or less , how the car goes stops goes stops sort of, wll im getting that at any rpm only after backing off the throttle, no missing wen accelrating and no loss of power !?

i know its not choking of air, and i know its not a fuel problem, otherwise it would do it under full throttle, worse even, and it hasnt done a headgasket either....

whilst doin it i was coming up works driveway, wen i clutched in, it stalled...somethign electrical ???

just happenend recently...(past 2 weeks)


any commments be greatly appriciated !

- Grechie

 

_________________

Ford Falcon EA Naturally Aspirated 4.0L i6
13.797 @ 157.16km/h (Limiter Bounce)

1/4 Mile Video

Top
 Profile  
 
 
Posted: Tue Feb 13, 2007 5:11 pm 
Getting Side Ways
Offline
User avatar

Age: 38

Posts: 520

Joined: 23rd Dec 2005

Ride: EF Futura Wagon

Location: Toowoomba
QLD, Australia

Probably a rich condition off throttle. A leaky injector or such could cause this. Could also be the opposite, a lean condition. When you back off and have high revs with no throttle (tps senses closed) the ECU cuts the injectors either off or to a minimum. If you have a loose vacuum line or punctured booster this could cause what you are describing.

 

_________________

If it doesn't fit, jam it. If that doesn't work use a hammer. - Engineers Motto

Top
 Profile  
 
 
Posted: Tue Feb 13, 2007 5:19 pm 
Getting Side Ways
Offline
User avatar

Posts: 3115

Joined: 20th Dec 2004

Ride: Falcon

Location: Adelaide
SA, Australia

Two other things I can suggest are TPS or ISC. The ECU relies on both of these when you are backing off the throttle.

 

_________________

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

Top
 Profile  
 
 
 Post subject: Re: HELP PLEASE : Backing Off Throttle Hicups
Posted: Tue Feb 13, 2007 6:04 pm 
Moderator
Offline

Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

Grechie wrote:
Hey guys

Weird problem only on backing off of the throttle, the car hicups, like u no wen in 1st gear at 10 kays or less , how the car goes stops goes stops sort of, wll im getting that at any rpm only after backing off the throttle, no missing wen accelrating and no loss of power !?

i know its not choking of air, and i know its not a fuel problem, otherwise it would do it under full throttle, worse even, and it hasnt done a headgasket either....

whilst doin it i was coming up works driveway, wen i clutched in, it stalled...somethign electrical ???

just happenend recently...(past 2 weeks)


any commments be greatly appriciated !

- Grechie


are you using a auto ecu in a manual??????
Top
 Profile  
 
 
Posted: Tue Feb 13, 2007 8:07 pm 
Getting Side Ways
Offline

Age: 31

Posts: 462

Joined: 7th Apr 2005

Ride: EA

Location: Melbourne
VIC, Australia

yea i am using a auto ecu but that hasnt stopped me in the pass 1 and a half years....ill look into new tps or isc, but there is no vacuum leaks, ill check it out thoroughly tommorow though...could it be starving for air?>

 

_________________

Ford Falcon EA Naturally Aspirated 4.0L i6
13.797 @ 157.16km/h (Limiter Bounce)

1/4 Mile Video

Top
 Profile  
 
 
Posted: Tue Feb 13, 2007 8:32 pm 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

stockstandard wrote:
Two other things I can suggest are TPS or ISC. The ECU relies on both of these when you are backing off the throttle.


My 88EA does the same, new ECU & TPS & Dizzy etc ..etc...and I haven't found it yet. Its like it doesn't quite get enough fuel at that time, but goes like a scouldered cat at WOT.

 

_________________

http://youtu.be/jJTh9F3Vgg0

Top
 Profile  
 
 
Posted: Tue Feb 13, 2007 9:17 pm 
Getting Side Ways
Offline
User avatar

Posts: 3115

Joined: 20th Dec 2004

Ride: Falcon

Location: Adelaide
SA, Australia

Grechie wrote:
ill look into new tps or isc


I doubt you will need a new one.

TPS is easy to check with a multimeter. The ISC may just be sticky, take it off, give the insides a spray with degreaser then some WD40 and give it a shot.

 

_________________

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

Top
 Profile  
 
 
Posted: Tue Feb 13, 2007 9:38 pm 
Moderator
Offline

Posts: 14513

Joined: 7th Nov 2004

Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

Grechie wrote:
yea i am using a auto ecu but that hasnt stopped me in the pass 1 and a half years....ill look into new tps or isc, but there is no vacuum leaks, ill check it out thoroughly tommorow though...could it be starving for air?>



ok
i may be wrong in your case but this worked for me...
when i first put the el auto ecu in my ea manual it did the same thing..
for the first month is was running fine and one day it decided to do it all the time.
the ecu thinks its auto so when you get under 15 kmh it gives the engine a rpm kick via the isc for the auto to change into low gear..
although in an auto you cant feel it..

to overcome this i cut the vss (vehicle speed sensor)wire to the ecu..
and it wont do it anymore...
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 8 posts ] 

Who is online

Users browsing this forum: No registered users and 27 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 Wed Dec 13, 2017 11:25 am All times are UTC + 11 hours

 

 

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