850 -92 converted automatuc>manual, ignition problem

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Johan Plane - 12 May 2007 12:10 GMT

Hi all,
1. When the auto gearbox collapsed I decided to rebuild with a manual
instead. All is well and fine, the car performs nicely with only one
hitch. Every now and then, when to engine is strained it seems as if the
ignition "fails", the car has a hiccup or however to describe it which I
find a bit annoying. Could it be that the electronics have to be
reprogrammed as it this seems to happen when the RPM sinks to a level
where kickdown or gearchange would have happened had it still been an
automatic gearbox??

2. Anyone knows if there is any electrical wiring scheme available on
the net? Its for a 5 cyl 170 BHP 850 -92.

Johan

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Tim.. - 13 May 2007 10:18 GMT

> Hi all,
> 1. When the auto gearbox collapsed I decided to rebuild with a manual
[quoted text clipped - 5 lines]
> where kickdown or gearchange would have happened had it still been an
> automatic gearbox??

This is a possibility, can you be much more specific with regard to what RPM
this happens at, throttle positin, and whether the hiccup is reproducable at
will??

> 2. Anyone knows if there is any electrical wiring scheme available on the
> net? Its for a 5 cyl 170 BHP 850 -92.

Off the top of my head, I think this engine runs the twin combined ECU setup
(Ign / Fuelling + gearbox) How exactly did you convert it with regard to the
the electronics?

Tim..

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Hakan Gemici - 13 May 2007 15:12 GMT

> 2. Anyone knows if there is any electrical wiring scheme available on
> the net? Its for a 5 cyl 170 BHP 850 -92.
>
> Johan

Hope these helps.

http://rapidshare.com/files/31081760/1992_volvo_850_2.5L_ecm_wiring_diagram.pdf.html
http://rapidshare.com/files/31082973/1992_volvo_850_2.5L_automatic_transmission_
subsystems.pdf.html

Regards,

Hakan.

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