03 LC100 T/D REVS HIGH CHANGING GEARS

Submitted: Saturday, Apr 21, 2007 at 11:31

ThreadID: 44564 Views:2410 Replies:3 FollowUps:7

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Brooka27

Hi there, when changing gears I have noticed the revs are sticking up around 1000rpm, once I have depressed the clutch. This does not happen every time either.
I have tried turning the air con on and off during this happening and it doesnt change the revs.

Any ideas or theories are much appreciated.

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Reply By: Member - Colin (WA) - Saturday, Apr 21, 2007 at 12:06

Saturday, Apr 21, 2007 at 12:06

Hi Brooka,
Have you got an idle up button ? This raises the idle speed of the motor for cold weather running.
Col

AnswerID: 234918

Follow Up By: Brooka27 - Saturday, Apr 21, 2007 at 12:17

Saturday, Apr 21, 2007 at 12:17

Hi Col, yes there is an idle up button. I have checked that i havent knocked it when it happens, that was my first thought when it started happening.

Do you think it could be a fault switch for the idle up?

Cheers Brooka

FollowupID: 495899

Follow Up By: Member - Colin (WA) - Saturday, Apr 21, 2007 at 12:53

Saturday, Apr 21, 2007 at 12:53

Hi Brooka,
The idle up increases the revs to about 1000 rpm so sounds like it could be the switch . Does it idle high all the time or cut back to normal after a while ?
Had the same thing but turned out to be operator error. LOL
Col

FollowupID: 495906

Follow Up By: Brooka27 - Saturday, Apr 21, 2007 at 13:28

Saturday, Apr 21, 2007 at 13:28

Once i have depressed the clutch it stays high for a few seconds then drops back as normal.
I have played around with the switch it seems to idle up okay when toggled in and cuts out straight away when toggle out.

FollowupID: 495913

Follow Up By: Brooka27 - Saturday, Apr 21, 2007 at 13:35

Saturday, Apr 21, 2007 at 13:35

Col where have your spotties been hooked into, for the high beam on/off control from your comination control switch.

FollowupID: 495916

Follow Up By: frosty01 - Saturday, Apr 21, 2007 at 19:03

Saturday, Apr 21, 2007 at 19:03

Hi Brooka,
I drove an old white 9000 truck once that did a similar thing to what you are describing.
This was caused by the fuel filter blocking up.

Don't know if this helps at all,just a long shot.

Good luck

regards Frosty.

FollowupID: 495956

Reply By: Billowaggi - Sunday, Apr 22, 2007 at 17:07

Sunday, Apr 22, 2007 at 17:07

Hi Brooka, my HDJ79 which is much the same engine does the same thing, it has done it from new. I did ask the dealer about it and they say it is mormal. I also have a mate with the same truck as me his also has a delay in revs returning to idle. My thought is that it may be to help give smoother throttle control when driving slowly over rough stuff.
Regards Ken.

AnswerID: 235128

Follow Up By: Brooka27 - Sunday, Apr 22, 2007 at 17:21

Sunday, Apr 22, 2007 at 17:21

Thanks Ken, its good to hear someone else is having the same issue.
Regards Jason

FollowupID: 496133

Follow Up By: Dunedigger - Monday, Apr 23, 2007 at 15:06

Monday, Apr 23, 2007 at 15:06

My '79 does the same thing, after a while you learn to take the foot of the accelerator slightly earlier before depressing the clutch. I assume it is a anti-pollution thing.

It does not hang at 1000 rpm though, just takes a little longer to return to idle

Dunedigger

FollowupID: 496386

Reply By: Member - Colin (WA) - Monday, Apr 23, 2007 at 10:19

Monday, Apr 23, 2007 at 10:19

Hi Brooka,
Sorry for the late reply went away .
I bought a NANE wiring kit from ARB $30-$40 ? If you have the basic elect knowledge then it is very easy. I cut the high beam wire and joined the relay wire into the join and run power off the aux/battery . I am no electrician but found it very easy.
Regards
Col

AnswerID: 235251

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