Ecu testing

from the simpel test that show that the air pressure in the fuel rail is lower on 16-17ms than it is when the intrument show 500-600ms. if the 500-600ms value was real, then the air pressure in the fuel rail will go down. you understand the test?

Frank S wrote:

Drdyse wrote: 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.

Hi Knut,
did you meassure the inductivity of a known good MAP sensor with the same instrument or did you just compare your readings with measurements of someone else?
From my experience the values you get with a cheap inductance meter are not comparable at all with meassurements of a quality unit. Bought a cheap one myself some time ago... ended up with an Amprobe LCR55A which is working well.

Cheers,
Frank

Hi Frank,

Yes I use the same instrument

mvh. Knut Åge

Gentlemen,

I appreciate your willingness to learn. But please be not disappointed when I tell you that such a meter must have a high acuracy both in absolute as well as in repetition if you want to fine tune your MAP sensor. And you need to control environmental pressure as well.

As long as u use it for a sanity check, I am okay with you. And I want to remind that late MAP sensors of 80s and later are not to be trusted as reference.

This does not mean that I disapprove of your projects.

And I keep my best guess that your ECU is totally okay.

Volker wrote: Gentlemen,

I appreciate your willingness to learn. But please be not disappointed when I tell you that such a meter must have a high acuracy both in absolute as well as in repetition if you want to fine tune your MAP sensor. And you need to control environmental pressure as well.

As long as u use it for a sanity check, I am okay with you. And I want to remind that late MAP sensors of 80s and later are not to be trusted as reference.

This does not mean that I disapprove of your projects.

And I keep my best guess that your ECU is totally okay.

I feel you make it more complicated that it need to be?
If I have a original not open map that is okey and I first test this and than switch to the New overhauled map and calibrate it to the exact same value with the same barometer pressure in the room and with the same vacuum pump with the same manometer and the same instrument that repeat very well, than it can not be so big differanse from my overhauled map and Bosch original setting?
The barometer pressure is only make a smale differanse on the travel of the diaphragme that are for the full load, the Android cella will not sense the differanse in barometer pressure if I understand it correct?

The 3 nr on one of the original aluminium rivit on the map is a code for what time the map was adjusted by Bosch? How you read this code?

Mvh. Knut Åge

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Here is some map that I have overhauled

Have also overhauled alot of this AAV

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