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 rough run

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sydsmiler
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Number of posts : 9
Home City : orewa auckland new zealand
Registration date : 2015-06-08

PostSubject: rough run   Thu Jun 22, 2017 7:58 am

Hi all today, ive a 1998 s.c 3ltr 1kz turbo with very strange idle and revs rise and fall not by much but not normal.Im told this could be a EGR system??, ive been doing short trips every day of 16km in heavy traffic.Its got a new head on it 10ooo ago new turbo, radiators and all filters and oil get changed every 5000km...Any ideas please??.smiler
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Hiace4wd
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Number of posts : 493
Home City : Netherlands
Model and year : 1994 Toyota Hiace 4x4 DIY camper
Registration date : 2016-02-01

PostSubject: Re: rough run   Thu Jun 22, 2017 9:22 am

Perhaps take it for a long drive? Like a 1 hour drive that everything heats up completely?
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GPW
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Number of posts : 487
Home City : Cambridge, UK
Model and year : Model: KD-KZH100G-MRPGT
Year: 1996
Colour: 4K1
Trim: FN42

Registration date : 2016-07-16

PostSubject: Re: rough run   Thu Jun 22, 2017 9:58 am

sydsmiler wrote:
Hi all today, ive a 1998 s.c 3ltr 1kz turbo with very strange idle and revs rise and fall not by much but not normal.Im told this could be a EGR system??, ive been doing short trips every day of 16km in heavy traffic.Its got a new head on it 10ooo ago new turbo, radiators and all filters and oil get changed every 5000km...Any ideas please??.smiler

There is also an issue in some vans of the ECU capacitors getting a bit leaky, possibly a bigger risk if used in a hot area.
The 1kz has an engine ECU in the passenger (LHS) door pillar that's a bit of work to get to but perhaps worth checking.

Google up on 1KZ ECU capacitors

It may not be the problem but it's a reasonable suspect. An ECU firm or electronics technician should be able to change them out, may be worth a look anyway as they may fail someday anyway.
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