Diesel Jackaroo - engine coughing

Submitted: Friday, Feb 25, 2005 at 19:14
ThreadID: 20785 Views:1801 Replies:7 FollowUps:7
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Hi, I've got a 2001 TD Jackaroo - 50k on clock and the engine keeps coughing on low revs (less than 2000). If I am in 3rd, with gentle acceleration, thats when it does it worst. On heavier acceleration it seems to be fine.
Also, when coasting it jerks relatively strongly in the moment between just having the foot on the accelerator, and just off. Otherwise, the enging runs perfectly. All filters changed 4000kms ago.
Anyone got any ideas as to what it might be?

Cheers.
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Reply By: Splitpin - Friday, Feb 25, 2005 at 19:45

Friday, Feb 25, 2005 at 19:45
Had the same sort of thing with my patrol not long ago. Got so bad it died on me a few times. It turned out it was a pin hole or a small split in the fuel line somewhere and the engine was sucking in bits of air in the fuel which was what caused the jerking. All I did was went to repco and got two long pieces of hose (one for supply line and one for return) and that fixed it. It was too easy. Just run the hose in loose and bleed it to see if it works first before you go running it in permanently.
AnswerID: 100176

Reply By: Wayne (NSW) - Friday, Feb 25, 2005 at 21:22

Friday, Feb 25, 2005 at 21:22
Steppie,

Take two aspro and buy a Toyota. Just kidden.

Sounds like it is sucking air. As said in other post check fuel lines first and also check inlet manifold.

Wayne
AnswerID: 100186

Follow Up By: Steppie - Thursday, Mar 03, 2005 at 15:36

Thursday, Mar 03, 2005 at 15:36
ha ha thanks mate. I agree the toyota's are superb. I live in Darwin, where the 2wd:4wd ratio is nearly 1:1! You only have to look around town to see what vehicles are trusted, and the troopies/cruisers/prados win hands down.
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FollowupID: 359030

Reply By: Member - Phil G (SA) - Friday, Feb 25, 2005 at 22:50

Friday, Feb 25, 2005 at 22:50
That series Jackaroo had known problems with injector seals. Worth checking out.

Also I'll assume you know how finicky the Jacks are with oil. No thicker than 5W30.

Cheers
Phil
AnswerID: 100199

Follow Up By: Member - Banjo (SA) - Saturday, Feb 26, 2005 at 18:10

Saturday, Feb 26, 2005 at 18:10
er......for mild climates, 10W-40 is just fine and dandy.
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FollowupID: 358445

Reply By: guzzi - Saturday, Feb 26, 2005 at 07:29

Saturday, Feb 26, 2005 at 07:29
Steppie,
Do a search on jackaroos on this site, I seem to remember someone a month or 2 ago haveing similar problems, turned out to be the oring on a senseing line going to the fuel pump, cost him a lot to find.
worth a look
AnswerID: 100219

Reply By: jackablue - Saturday, Feb 26, 2005 at 08:58

Saturday, Feb 26, 2005 at 08:58
Maybe check link text
AnswerID: 100225

Follow Up By: Steppie - Thursday, Mar 03, 2005 at 15:31

Thursday, Mar 03, 2005 at 15:31
Thanks for info.

I towed a boat 900 km over the last weekend, and the engine now runs about 90% better (virtually no coughing on high-load & low rpm). Is this just dirty injectors that need some harder work?

Steppie
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FollowupID: 359029

Reply By: Member - Banjo (SA) - Saturday, Feb 26, 2005 at 18:13

Saturday, Feb 26, 2005 at 18:13
Touch wood my 99 has not done such a thing yet, but I do have a developing issue ..... on solid acceleration, I can hear a "whipper snipper" whining away solidly, on the passenger's side (windows down of course) - think I've got an exhaut leak - can't find it yet, but something is up. Not the slightest leak at idle of course - that woud be too easy.
AnswerID: 100278

Follow Up By: Savvas - Saturday, Feb 26, 2005 at 19:49

Saturday, Feb 26, 2005 at 19:49
Hi Banjo,

Is your "whipper snipper" noise related to movement or engine load?

Might be a CV or wheel bearing, or as simple as the centre cap on a wheel being a bit loose.
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FollowupID: 358456

Follow Up By: Member - Banjo (SA) - Sunday, Feb 27, 2005 at 15:51

Sunday, Feb 27, 2005 at 15:51
Engine load Sav - vehicle movement seems not in the equation - comes in right on 2000 rpm when the engine is under load and gets louder until I change gear (gone as the revs drop) - my simple view would be somewhere in the exhaust system - its under greater pressure when under accelleration load I guess - not a hint at idle - my intention is to let it progressively get worse until I can trace the noise at idle. Then again, it could be one of the many "decraminators" in the engine bay - who can tell ?
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FollowupID: 358544

Follow Up By: Terryfied - Monday, Feb 28, 2005 at 22:42

Monday, Feb 28, 2005 at 22:42
Banjo, silly question but is it the turbo that tou are hearing? This sounds similar to my 2002 jack,this sound was only noticeable after fitting the snorkel.

Terry
The scrub is something terrible. Oh, what a damnable, treacherous, God forsaken country it is to be sure. I believe it would sicken the Devil himself.

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FollowupID: 358746

Follow Up By: Member - Banjo (SA) - Tuesday, Mar 01, 2005 at 09:03

Tuesday, Mar 01, 2005 at 09:03
Funny you should say "snorkel" Terry - it developed a couple of months after having the snorkel fitted - it is on that side - NOT heard to any extent on the turbo side - might give it a short run with the air cleaner lid removed I use a Unifilter - you might be onto something there - the partial vacuum in the intake would be significant under load too. Thanks for the pointer.
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FollowupID: 358778

Reply By: Turbos - Tuesday, Mar 08, 2005 at 18:05

Tuesday, Mar 08, 2005 at 18:05
I believe that "whipper Snipper" sound is your turbo sucking air through your filter and snorkel. I have a 2000 TD Jack and have a K&N pod filter attached. When I accelerate hard and reach 2000 rpm a rather loud ticking sound develops and this is followed by a "blow off" noise when i change gears or back off. To me it sounds like you Jack is simply getting better air flow, as this is essentially what my K&N is doing. I would'nt worry too much unless someone with credibility tells you there is a definate problem. Cheers.
AnswerID: 101601

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