Die Bosch D-Jetronic war 1967 die erste Großserien elektronische Einspritzung der Welt. - Bosch's D-Jetronic was the first mass-production electronic fuel injection.

D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052

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30 Oct 2019 23:43 #12564 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Then he can surely also tell you how to tune your ECU appropriately
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107

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31 Oct 2019 09:29 #12565 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
hello volker.

you think it was possible to adjust the ECU ?

if not me I disassemble the engine and I put the original acc. I have a new one in a box.

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31 Oct 2019 10:38 #12566 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Everything is possible. I am sure the guy who sells such sport cam shafts can exactly tell you how to tune the ECU and is not a simple Sell and Forget guy. In 912 you should re-tune carburettor with nozzles, in D-Jetronic you change some resistors. No problem for him. Just ask for the tuning manual.
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107

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31 Oct 2019 16:59 #12567 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hello

there, I have a big doubt !!

it's at Oratech


www.typ4shop.de/

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31 Oct 2019 17:01 - 31 Oct 2019 18:04 #12568 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
I will dismantle the engine in early November and return the original ACC


www.webcamshafts.com/pages_vehicles/auto...c_001691_001093.html
Partie #:

00-152

Moudre:

86

Admission

Échappement

Valve Lash (Inch):

0,006 "

0,006 "

Levage de soupape (pouces):

0,423

0,423

Levée de soupape (mm):

10,74

10,74

Durée annoncée:

273 °

273 °

Durée @ 0.050 ":

234 °

234 °

Centre du lobe:

108 °

108 °

Entrée
ouverte

9 °

Avant le
CDT

Échappement
ouvre

45 °

Avant la
BDC

L'entrée
ferme

45 °

Après
BDC

Échappement se
ferme

9 °

Après
TDC
Last edit: 31 Oct 2019 18:04 by LUX PIERRE.

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31 Oct 2019 19:39 #12569 by Frank S
Replied by Frank S on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Lux Pierre,

max. Cam you can run with D-Jet is 262° WebCam with max. CR of 8.8:1 but not easy to adopt the D-Jet.
276° Schleicher would work much better.
If you don't want to spend a year or more to tweak your system, convert it back to stock!

Porsche 912 is L-Jetronic and the AFM can handle a slightly different cam better.

Best Regards,
Frank

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01 Nov 2019 13:16 - 01 Nov 2019 13:46 #12577 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Thank you FrankS

I will go down my RV: because here I have 9.21: 1

and I will put back my "CAMSHAFTS", origin, because I'm afraid to buy another 262 ° if it does not work again ..
but if you're on that CAMSHAFTS, I'll think about it.

I was looking to win some horses ..
a big thank-you.
Pierre.
Last edit: 01 Nov 2019 13:46 by LUX PIERRE.

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01 Nov 2019 19:27 - 01 Nov 2019 19:28 #12582 by nordfisch
Replied by nordfisch on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Pierre,
it is a good decision to reinstall the original camshaft.

I would prefer an engine that runs without everlasting corrections and problems, too.

Regards
Norbert
Last edit: 01 Nov 2019 19:28 by nordfisch.

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01 Nov 2019 19:31 #12583 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
merci !!

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02 Nov 2019 01:35 #12584 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi,

what I find disturbing is that this is now the second time that Porsche 914 owners come to this forum and ask for help and after 50 posts we learn that we are talking about a modified engine :Bang: . The other case was worse. Someone got his 1.7l engine modified to a 2l engine in Texas. And people in 914world claimed that that would run without any problems and laughed at me when I told that that needs even green instead of yellow injectors.

Good that you will now restore to original cam shaft. But next time please tell such facts up front.
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107

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11 Nov 2019 16:39 #12660 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Good morning all !!
and sorry for not giving all the details of my engine.

but now, I worked a week and I put everything back in order with ACC origin.
try this morning. and still the same thing not enough gasoline at times ... pfff

I'm fed up ...

yet it is not the first 2 GB GB I do and I never had a problem ..

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11 Nov 2019 17:14 #12664 by nordfisch
Replied by nordfisch on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Pierre,
I don't remember the MPS was checked... maybe it doesn't work at all or is totally misadjusted.
Did you check it?

Does it make any difference when you totally disconnect it from the vacuum line (close the line towards the engine)?

Regards
Norbert

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11 Nov 2019 17:20 - 12 Nov 2019 12:02 #12665 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
:(
Last edit: 12 Nov 2019 12:02 by LUX PIERRE.

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11 Nov 2019 20:44 #12667 by nordfisch
Replied by nordfisch on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Pierre,
'new' doesn't mean 'o.k.'

Units with late production date are often defective.
Tell us the production code stamped on one of the rivets, three digits.

And what happens when you disconnect it from the vacuum?

Regards
Norbert

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11 Nov 2019 22:48 #12668 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
www.sw-em.com/bosch_d-jetronic_injection.htm

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11 Nov 2019 23:27 #12669 by nordfisch
Replied by nordfisch on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Pierre,
did you understand what I wrote?

I know the page you are referring to, but what do you want to tell us?

Regards
Norbert

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12 Nov 2019 10:08 - 12 Nov 2019 11:58 #12670 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hello
I mean I brought him my TPS to fix it 1 month ago
he put a new track (modern)
and the TPS works well.
Last edit: 12 Nov 2019 11:58 by LUX PIERRE.

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12 Nov 2019 11:03 #12671 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Sorry for the MPS
manifold pressure sensor ??
this part is not new , but i tested it

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12 Nov 2019 11:57 #12672 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hello
here it is, MPS test this morning

when I remove the vacuum hose, I have a lot of gas, but the engine runs less well slowed down!

so my MPS would not be good ???

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12 Nov 2019 14:35 #12673 by nordfisch
Replied by nordfisch on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052

LUX PIERRE wrote: ...

when I remove the vacuum hose, I have a lot of gas, but the engine runs less well slowed down!

so my MPS would not be good ???


Yes, this means your MPS is adjusted badly and doesn't respond to the pressure conditions in the manifold as it should.

Removing the hose means 'full throttle' - the MPS shows the correct response, enriches the mixture.

Reinstalling the hose means higher vacuum, your MPS leans down the mixture much more than it should do.

Take a look at the compendium, look at the comments and the photos there, do a visual inspection: Has the MPS been opened, has anyone <mis>adjusted it?

Regards
Norbert

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