Eratic ilding Jack

Submitted: Saturday, Feb 21, 2009 at 16:23
ThreadID: 66167 Views:1610 Replies:4 FollowUps:7
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My beloved Jack has been driving me crazy with erratic ilding, surging etc, Was getting ready for a divorce LOL.
Scan guage indicated maf so replaced that for $260, couple days later it is doing the same again GRRRR, stalling at lights etc.
Anyway one of the ferry drivers at work is a retired mechanic and suggested I spray all the sensors with electrical contact cleaner.
I used servisol electrical clean and lube. Removed all plugs( well 4 that I found) and sprayed both connections and then sprayed carby cleaner down the air intake as well. After some rough running it is now running like a dream again, and the best part the owner of the business next door to work lent me the contact cleaner. LOL
Anyhow I hope someone else can befit from my experience.
We have been running our new Nullarbor on premium fuel and after a run seems to have better pick up and fuel economy seems to be improving but still not good. Also tipped half a bottle of petrol conditioner into a tank and pumped up tyres to 40psi. Next week new air cleaner and plus 50 globes
Cheers Pete
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Reply By: RV Powerstream P/L - Saturday, Feb 21, 2009 at 18:32

Saturday, Feb 21, 2009 at 18:32
That is a good result I was concerned that you had the 3.0 Diesel until you mentioned finding 4 plugs and was a liittle relieved as I doubt the fixing methods adopted would have fixed one of them.

AnswerID: 350286

Follow Up By: Madfisher - Saturday, Feb 21, 2009 at 23:26

Saturday, Feb 21, 2009 at 23:26
I regret not owning one of the older 3.1 td, but you could not give me a 3lt thank you.
The only problems I have had have been a inlet manifold gasket that was spilt and the current problem.
Cheers Pete
FollowupID: 618639

Reply By: Member - Axle - Saturday, Feb 21, 2009 at 19:01

Saturday, Feb 21, 2009 at 19:01
Hi Pete, The joys of electrics!!, The machine i operate has a fully computerised elec system, every 6mths or so it has a fit , runs like a bucket of c@@T, usually spray everything, unplug , and reconnect everything i can get my hands on!!!, Next thing its all good!, can never work it out, just live with

As long as its a cheap fix eh!!.

Cheers Axle.
AnswerID: 350289

Follow Up By: Madfisher - Saturday, Feb 21, 2009 at 23:33

Saturday, Feb 21, 2009 at 23:33
Yes Axle the days of new plugs and pionts, and if really keen new leads and clean the carby are long gone. Actually this is the 5th efi car we have owned and the first to give any problems like this. From what I have read on other forums it is a Jack 3.5 thing, but now I understand more makes it easy to fix.
You have a 4.5efi now If I am not mistaken so could have similar problems although rare in toyotas.
Cheers Pete
FollowupID: 618642

Reply By: Member - Oldbaz. NSW. - Sunday, Feb 22, 2009 at 09:02

Sunday, Feb 22, 2009 at 09:02
As a fellow 3.5 owner anything going wrong gets my attention.
Pleased you got it sorted & cheaply. Mine has been trouble free
over 25k but isnt doing much work, will tow C/t to Perth & back in Sept. I take it the Nullabor is a little sluggish & thirsty ? I too
run 40 psi but not premium fuel. Let me know when you find the cure...cheers...oldbaz.
AnswerID: 350357

Follow Up By: Madfisher - Sunday, Feb 22, 2009 at 10:01

Sunday, Feb 22, 2009 at 10:01
Baz on your trip to perth trial premium over 3 tanks. You should get an extra 50 ks or more per tank and it will perform better but takes a while for computer to readjust.
Yes the nullarbor was a little dissapionting in the performance and fuel consumption area. It had only done 4000ks over the last 12 months so that wouldn't help. On the currant tank it is up to 480k which is getting better(trip to Sydney and return and rest around town) When I drove it yesterday it did seem to go better but maybe that's because I have been driving the 3lt Paj all week.
Going to see if I can find someone with some bitron additive for the diff and gearbox. I know doug swears by Nulon but I have had good results in drivelines with the 246. Might only be 5% but it all adds up. I know truckies save 5% on their fuel costs by running all synthecies oils in the driveline
The widetrack Nullarbor is 150kg heavier then my manual 98, but is so quite, drives like a limo.
Cheers Pete
FollowupID: 618665

Follow Up By: Madfisher - Sunday, Feb 22, 2009 at 13:06

Sunday, Feb 22, 2009 at 13:06
Baz just filled the Nullarbor up 73.5l to do 487ks,I get 19 mpg or 15.09l/100. That was loaded up to the roof, and sitting on 110 where I could. I know you only use yours for towing so bit hard to make a comparsion.
cheers Pete
FollowupID: 618702

Follow Up By: Member - Oldbaz. NSW. - Sunday, Feb 22, 2009 at 13:59

Sunday, Feb 22, 2009 at 13:59
Pete, those figures sound within reason. I got 15L/100 over 13k
outback touring, towing a C/t with 4 adults but we travel lighter than most & kept under 100 kph, tyres @ 40 psi. With local running, not towing, no weight I get between 12 & 13 L/100,
but it has to be gentle, boot it & those figures go out the window. I havent confirmed the restrictor thing yet but will get
my man to check that out with a rego check next month. The
difference between under 100 kph & around 110 kph towing
was 5.5 k/L to nearly 7 k/l. I learnt that on the first tankful !!!
Thats about 18L/100 down to a bit over 14L/100 so is quite
significant. Not sure if yours are auto like mine......oldbaz

FollowupID: 618713

Follow Up By: Madfisher - Sunday, Feb 22, 2009 at 18:30

Sunday, Feb 22, 2009 at 18:30
Baz the Nullarbor is Auto, and also does not have free wheeling hubs, just the button on the dash, and the widetracks are heavy 2150kg. But it feels much more refined then my 98.
Cheers Pete
FollowupID: 618768

Reply By: Sand Man (SA) - Sunday, Feb 22, 2009 at 13:57

Sunday, Feb 22, 2009 at 13:57

If the problem returns or persists, I think I have the answer for you.

Experienced the exact same symptoms you describe.
Tried cleaning the MAF sensor but the problem persisted.
The Dealer could not detect the cause of the problem either.

I googled the problem and found reference from a Isuzu Master Machanic to a possible leaking Inlet Manifold Gasket which is a common known problem with the V6 Jack.

After removing the top plastic cover from the manifold on top of the V6 engine, spray around the edge with some brake clean.
If you observe bubbles, one of the manifold gaskets (top or bottom) is leaking.

If I find the site again, I'll attach the reference.


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AnswerID: 350398

Follow Up By: Madfisher - Sunday, Feb 22, 2009 at 18:26

Sunday, Feb 22, 2009 at 18:26
Sand man you are on the money, but I replaced the3 inlet manifold gasket about 6 months ago. , but it may have gone again.
Thank you, do you still have your Jack?
Will give it a couple of days and monitor how it is going
Cheers Pete
FollowupID: 618766

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