1HZ Landcruiser engine cuts out when it hits limiter

Submitted: Sunday, Oct 23, 2022 at 23:46
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Hi all I was driving in the dunes today and ran into a problem with my 2003 105 series landcruiser. It's a 1HZ with an after market turbo tuned with a turbo actuator running 12psi. I have only just bought and this was my first weekend testing the car out. Everything was going fine but when I tried going up a dune in L4 gear 3 and everytime I hit the limiter the engine cut out and white smoke came out the exhaust. Does anyone know what's going help would be most appreciated
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Reply By: nickb - Wednesday, Oct 26, 2022 at 23:42

Wednesday, Oct 26, 2022 at 23:42
From memory 12psi is pushing it for a 1HZ, normally 8-10psi max is(was?) the rule.

Not sure about the cutting out. Do you mean the engine stalled or just lost power?
AnswerID: 641924

Reply By: Daz11 - Thursday, Nov 03, 2022 at 15:49

Thursday, Nov 03, 2022 at 15:49
Hi JamesHZJ105R,

Had the same problem on mine a few years ago. It was the rubber air hose on the inlet side of the turbo being sucked together at high revs stopping air going through. This could be caused by either a blocked air cleaner or, as in my case, the rubber had softened with age.

Solution was to replace with a new hose and problem went away. From memory local truck spare parts places sell them and they are fairly cheap. Worth replacing the clamps at the same time.

Daz
AnswerID: 642001

Reply By: Member - DOZER - Monday, Nov 14, 2022 at 10:26

Monday, Nov 14, 2022 at 10:26
James, 12 psi is too much unless its intercooled. turn it back down or the motor will crack the head. Yeah sounds like the inlet hose as under bonnet would have been toasty.
AnswerID: 642070

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