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Author Topic: The trials and tribulations of Bosch EFI  (Read 9110 times)
k0mpresd
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« Reply #15 on: December 10, 2019, 07:20:02 AM »

They have both SY_HFM and SY_DSS set... to see what is used for what requires looking through the relevant code or FR.
MED9 on the RS3/TT-RS and RS6 V10 does not have any MAF though.

i see what you mean.
so what was the point anyways, for the oem to hack a system to their own liking when (in theory) the original system (map based) worked?
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prj
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« Reply #16 on: December 10, 2019, 07:24:14 AM »

I don't know.

But some other makes never used a MAF on ME7 at all.
A MAF based system is better at adapting over engine life time in some ways. And worse in other ways, as it's sensitive to leaks.
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fknbrkn
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« Reply #17 on: December 10, 2019, 07:25:01 AM »

To sell bosch mafs to vw obviously

What's the point to use vvt in transverse engines which doesn't work at all? Same I think
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Blazius
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« Reply #18 on: December 10, 2019, 11:00:29 AM »

To sell bosch mafs to vw obviously

What's the point to use vvt in transverse engines which doesn't work at all? Same I think

What do you mean? Why doesnt VVT work on the golf platform?
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IamwhoIam
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« Reply #19 on: December 11, 2019, 09:41:01 AM »

What do you mean? Why doesnt VVT work on the golf platform?

Because it's disabled in all the K03/K03S files? LOL
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fknbrkn
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« Reply #20 on: December 12, 2019, 01:48:26 PM »

What do you mean? Why doesnt VVT work on the golf platform?
Flat kfnwse on all transverse 150/180hp engines
There is some kfnwkhl stuff for a cat heating but I've never saw this $500 shit working
But they're enabled it in a4 platform longitudinal engines and tt225 for a some reason

Btw what about me7.5.10 they're doing  map based ecus for 1.4na engines
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prj
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« Reply #21 on: December 12, 2019, 02:02:52 PM »

There are a few MAP based ME7's here and there.

Basically what I am saying is - it is very hard to convert a MAP based ME7 to HFM, it's much easier to go the other way around, because 99% of what you need is already there.
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IamwhoIam
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« Reply #22 on: December 13, 2019, 04:24:23 AM »

Where has the OP disappeared? and why hasn't he attacked me because I am wrong?
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GolfSportWagen
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« Reply #23 on: December 13, 2019, 09:10:39 PM »

Where has the OP disappeared? and why hasn't he attacked me because I am wrong?

Perhaps you don't understand that CIS was a desperation move by Bosch when their EFI systems suffered so many issues and they had nothing to sell? It was included because it was chronologically relevant and significant for being a mechanical FI system instead of an EFI system. It also highlight the two years of fuel pump failures Bosch customers endured.
« Last Edit: December 13, 2019, 09:19:50 PM by GolfSportWagen » Logged
k0mpresd
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« Reply #24 on: December 13, 2019, 09:44:11 PM »

Perhaps you don't understand that CIS was a desperation move by Bosch when their EFI systems suffered so many issues and they had nothing to sell? It was included because it was chronologically relevant and significant for being a mechanical FI system instead of an EFI system. It also highlight the two years of fuel pump failures Bosch customers endured.

i remember a 1972 (fairly certain that is correct), white in color, 914 that i owned many years ago. it was a virgin and still had the original (to be assumed) bosch efi system installed. ecu was mounted on the right side of the engine box from memory. throttle body on top center of the motor with a port injector for each cylinder. i can recall thinking how impressive it was for a car of this year model having any type of functioning EFI.
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