Ecu testing

Ecu 0 280 001 009 map 0 280 100 015 injectors 0 280 150 036

Hi Knut,
Welcome at jetronic.org...

Quite interesting, your test stand.

Watching the video I have noticed something that is not unimportant: Revolutions displayed are not engine revolutions, but distributor revolutions. The effect would therefore occur at twice the engine speed than is displayed.

Don't kill your distributor....

But I can find no explanation for the effect, too.

One question: are the injectors connected during the test?

Regards
Norbert

Hi Knut Åge,

your components seem correct for a European Volvo 160 3.0 . For high fuel consumption you should check whether your MAP sensor is leaking vacuum and whether it is closed by oriignal rivets and of course temperature sensors and leaking cold start valve.

Norberts hnt on engine rpm is correct, you measure distributor rpm. I use a test stand form Bosch as described in chapter 11 or my 4 channel oscilloscope. You should rather forget your strange symptom of 500 ms. That is obviously a measuring fault. Results from 1 to 15 ms , in extremes 30 ms is a normal value I measure.

But as I wrote before, I do not believe in an ECU failure (yet) and also not really in your test stand. You must simulate far more sensors and be more precisely.

Hi Norbert,
Thank you

The rpm on the distributershaft is conting on 2 points, so 1 rotation on the shaft show 2 rotation on the display. the distributer is driven by a polishmachine with adjustable rpm betwin 600-3000rpm (simulated engine rpm is than 1200-6000rpm).
Injectors is connected under the test, the injectors is cold after loong testing, so think it is ok for the injectors.

I can not understand why I get this error value in just this rpm range?

what happend if a condenser in the ecu is broken?

mvh. Knut Åge

Hi Volker,
MAP is not leaking at all. it have new diaphragm and seals change from me and readjusted to the same value as orginal on a 0 280 100 015, I use "20H" setting on my Unit UT602 and hav than 0,74 on 25InHg, 0,82 on 20InHg, 0,93 on 15InHg, 1,06 on 10InHg, 1,23 on 5InHg, 1,50 on 0InHg. have messure a big number of 015 map with this value with my test equipment, maybe it will have a differant value with differant vacuumpump and messure intrument to messure Henry. So I think Map is ok.

Tempratur sensors have be checked ok and have the right bosch nr.
coldstart injector is checked, no leaking.

in the test stand I have change the coolingwater and air temp. sensor with potmeter that I simulate temprature with. I use 300ohm on coolingwater and 390ohm on air temp.

what shall I change so I can get better test resultat on my teststand for ecu?
have you more spec. on your 4 channel oscilloscope? it can trust more on that than that I use to messure the injectors opningtime with today?

mvh. Knut Åge

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