TD42 air in fuel??

Submitted: Wednesday, Nov 19, 2003 at 19:25
ThreadID: 8628 Views:1846 Replies:5 FollowUps:1
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G'day all,
This one's been bugging me for a while!. I've got a '97 GQ trayback with a TD42 turbo intercooled motor. The thing really gets up and goes but after it's been switched off for a period of time and then restarted, upon acceleration it surges/falters at about 2800-3000rpm and then after a second comes clean and pulls properly again. The vehicle has a 95l long range tank and all hoses/connections look fine. Does anyone else suffer from this??

As an aside, I was thinking of replacing the original fuel filter with a finer filter FS1000 10 micron, commonly used on large diesels ie trucks and earthmoving. Not only are they far bigger, they are cheaper as well!

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Reply By: maverick - Wednesday, Nov 19, 2003 at 20:06

Wednesday, Nov 19, 2003 at 20:06
make sure the new filter wil deliver the same volume of fuel. some are not and are causing problems. as for your problem - generally if there is air then it will have an effect right through the rev range. check the filter and some of the electrics.
AnswerID: 37848

Follow Up By: Muzza - Wednesday, Nov 19, 2003 at 21:15

Wednesday, Nov 19, 2003 at 21:15
Cheers maverick,
yeah the FS1000's (fleetguard sorry, not finer filter) are about twice the size as the original (so will need to be relocated) as for the hesitation, still mystifying me a bit!
FollowupID: 27458

Reply By: cokeaddict - Wednesday, Nov 19, 2003 at 21:24

Wednesday, Nov 19, 2003 at 21:24
Hey Muzza,
Just a thought old mate. Have you checked out your water? just thinking you may have a minute leak in one cyl that only leaks when hot...therefore after you shut builds up to the point where its causing some problems until its tossed out the exhaust. Just a thought mate. Hope you sort it out.
AnswerID: 37856

Reply By: Truckster (Vic) - Wednesday, Nov 19, 2003 at 21:36

Wednesday, Nov 19, 2003 at 21:36
Yes I had the same sort of issue with a 147 ltr longrange tank.
the 95ltr tank is stock on the GQ Diesels.

I replaced the tank back to stock, and its been brilliant ever since.

I tried different fuel senders, pickups the lot.... nothing worked.
AnswerID: 37862

Reply By: Mick - Thursday, Nov 20, 2003 at 08:56

Thursday, Nov 20, 2003 at 08:56
There is a small in line screen on the inlet to the injection pump underneath the 17mm banjo bolt. under a small spring the size of a pen spring youll need to pick the screen out as its down the hole.
These sometimes cause cavitation and causes a blockage. Ive had it myself and doesnt take much to blow out with a compressor.
Be careful, as the screen is only 5mm in diameter.
AnswerID: 37898

Reply By: Muzza - Thursday, Nov 20, 2003 at 19:20

Thursday, Nov 20, 2003 at 19:20
Thanks to all, have to check out the small screen just before the pump, sounds like a good place to start.
AnswerID: 37951

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