Re: about bosch edu mods

[James Montebello <jamesm@domain.elided>]

The ECU site data was for a fuel-only unit, as that's all L-Jet runs.
The rev limiter in that case is a fuel cutoff.  It's possible that the
separate electronic ignition unit in the later GTV6s and Milanos (Bosch
EZ-L) also implements a spark cut or severe retard as a rev limiter.
EZ-L is detailed on the CarDisc CD, which I can't get to right now.
Perhaps it says if there's a limiter or not.

Countering this thought is the fact that the hacked L-Jet ECUs sold in
the aftermarket for the GTV6 & Milano claim to raise or eliminate the
rev limit.

james montebello

On 26 Jul 2002, alfajess wrote:

> The guy who published those jetronic ecu mods was Tero Antero Katajainen.
>
> Although his site is no longer there, there are many
> mirrored
> sites around.
>
> I've tried it in my verde's ecu, while all the markings
> were at the same indicated location, their purpose don't
> seem to match up. For an example , the easierst one to spot
> the difference is probably the rev limiter. According to
> his article, smaller value of R for R106 yields higher rev
> limit.
>
> For some reason, my verde ecu cuts in really early at
> 5500rpm so it is rather annoying esp on the track...
>
> I attached a pot to R106 so I can adjust the R value
> between 0 - 68k ohm though I took care never to get it
> too close to 0ohm.
>
> Result was dissapointing, no matter what resistance I tuned
> in, the rev limit kicks in dead on at 5500rpm.
>
> So, those of you EE guys with oscilloscope and a signal
> generator, check it out and see if you find something new.
>
> jess
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