Throttle retraction lag (2.5 TD)

bigwill · May 3, 2009

Any ideas as to how i can stop her revving slowly down to idle after taking my foot off the throttle, as apposed to going straight back to idle how it should? raised the idle speed the other day then she started doing it.

cheers.

Series71 · May 3, 2009

i had a load of crap in my throttle cable which made mine do that...either replace it or soak it in doozel overnight !

bigwill · May 3, 2009

yeh had a look at that, when you move it arround under the bonnet it snaps back straight away and still revvs. when left for a bit (30 seconds or so) it does return to idle.

Series71 · May 3, 2009

yep its more than likely the cable then

Series71 · May 3, 2009

if yer strugglin i'm only about 45 minutes away if you need a hand

The Mad Hat Man · May 3, 2009

yu fixed your motor then, Disco?

:bolt:

bigwill · May 3, 2009

i might be being really f***ing dense but, how is it the cable if i move it without touching the cable and it still does it?

Series71 · May 3, 2009

The Mad Hat Man said:
yu fixed your motor then, Disco?

:bolt:

tuftee on the road yet ?

bigwill said:
i might be being really f***ing dense but, how is it the cable if i move it without touching the cable and it still does it?

when you move the throttle from the injector pump it snaps straight back yes ? or does it slowly move back without touching the pedal...if its slow from the ip end i'd be looking at your spring and some wd40

bigwill · May 3, 2009

no, basically from on top of the injector pump it snaps back as it did when it worked fine, but it still revvs, despite being in the idle position, so between the pump and the pedal it works fine, but you may be right about a spring somewhere, shall take a look. any chance it could be a problem with the pump? cheers

Series71 · May 3, 2009

ok mate trust me on this as mine did egg zacchery the same...reved up fine and took an eternity to return to normal revs....and when you operate the throttle from the engine it snaps back real quick.. sounds to me like the throttle cable but i could be wrong..a decent squirt around the engine bay with wd40 might help !

bigwill · May 3, 2009

ok i trust ya, shall give it a go!

CharlesY · May 3, 2009

You MUST NOT use the throttle cable as the adjuster for slow running in these engines.

There is a separate little lever for slow running, which leans on the fuel return outlet pipe stub.

The throttle cable and linkage must have a little slack in it when your foot is off the pedal, and at that stage the main throttle will be allowing ZERO fuel delivery, and it will stay that way until the speed drops far enough for the SLOW RUNNING GOVERNOR to take over and hold the slow running speed.

If you use the main throttle lever as the slow running controller, there will be all sorts of problems, including ....

Cold start system DISABLED, and potential starting trouble.
Engine BRAKING very poor.
Engine takes too long to slow down.
and so on.

Set it up properly.
1. adjust throttle cable till there is some slack in it.
2. adjust slow running speed by using the adjusable screw on the little lever at the fuel return pipe stub.

CharlesY

bigwill · May 3, 2009

ah, interesting, most likely where i went wrong. thanks.

CharlesY · May 3, 2009

bigwill said:
ah, interesting, most likely where i went wrong. thanks.

" Ah, Interesting" ?

Is that IT ????

Ratty and I submit works of pure genius, and we get "ah, interesting"!!!!

Ratty, our talents aren't appreciated!

CharlesY

The Mad Hat Man · May 3, 2009

and????
yu sound surprised.

bigwill · May 4, 2009

no no, very much apriciated, just not keen on brown nosin - ya cant win on this site! got it running well by the way, cheers.

p.s. you & ratty should write a manual.

jai_landrover · May 4, 2009

Injection pumps need to be setup correctly don't go messing if your not ofay with how it all works. Charlsy, is spot on. I have mounted a hand throttle for raising the revs when winching but only when stationary. A mate of mine did what you did for trialling but it was terrible no engine braking and bloody dangerious when he decided to go off the edge of a serious slope. Jai

CharlesY · May 4, 2009

jai_landrover said:
Injection pumps need to be setup correctly don't go messing if your not ofay with how it all works. Charlsy, is spot on. I have mounted a hand throttle for raising the revs when winching but only when stationary. A mate of mine did what you did for trialling but it was terrible no engine braking and bloody dangerious when he decided to go off the edge of a serious slope. Jai

That's very interesting doing a hand throttle for winching.
Once you've got the girl in the back seat it's hard to reach the throttle!

But I think if you rigged a way to increase the TICKOVER speed by bringing its lever end away from the stop, you would find it holds a very steady speed, even when the load varied, and possibly up to nearly 1500 rpm, maybe even more.

I used to slip a small piece of wood (a matchstick is good) into mine to hold the tickover speed up, like for jump starting, and things that need some more revs.

CharlesY

jai_landrover · May 4, 2009

I just rigged up a choke cable as the hole in the dash looks very messy on a diesel 90 Jai

jzcktv · May 4, 2009

CharlesY said:
That's very interesting doing a hand throttle for winching.
Once you've got the girl in the back seat it's hard to reach the throttle!

CharlesY

CharlesY,
You've spent too much time in the garage mate, that's not Winching that's Wenching.

And that comment earlier from Bigwill, this is the manual. It's just interactive!

Graham,

Throttle retraction lag (2.5 TD)

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