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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12 Aug 2019 18:56 #12063 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Pierre,

well injectors must deliver fuel while cranking the engine even without trigger contacts. Pin 18 on ECU should be high from starter and then ECU drives injectors anyhow.

What you want to tell with your spark plugs, I did not understand. I fear that you use a bad translation program.
Viele Schraubergrüße - best regards, Dr-DJet Volker
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12 Aug 2019 20:55 - 12 Aug 2019 20:59 #12064 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
but the injector are not well controlled and the injector N ° 2 has no current no contact

I have to find a good person (you) to make my ECU

thank you so much
Last edit: 12 Aug 2019 20:59 by LUX PIERRE.

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16 Aug 2019 12:15 #12068 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hello everyone.
I thank you for all his good information.
now I have to wait for an analise and repair my ECU
and also find a good person to make me a new injection beam.

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16 Aug 2019 12:16 #12069 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hello everyone.
I thank you for all his good information.
now I have to wait for an analise and repair my ECU
and also find a good person to make me a new injection beam.

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10 Sep 2019 16:54 #12228 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hello Volker
here I finished my new injectors for D-Jetronic and tested my injectors again, the injectors are very well tested.
but when everything is mounted on the car, the injectors do not give gasoline.
the pressure of the pump is good (2 bars)
but nothing comes out of the injectors.
the engine runs very well when I put the start pilot.
Is it the ECU now?

I thank you.
Lux Pierre
Spa Belgium

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10 Sep 2019 18:35 #12230 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Lux Pierre,

if you do not see injectors spraying even while cranking the engine, yes then it must be cabling or ECU. Before you send it somewhere make sure that it is the right ECU for your car.
Viele Schraubergrüße - best regards, Dr-DJet Volker
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10 Sep 2019 19:16 - 10 Sep 2019 23:22 #12232 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
hello yes this is the calculator that I had with the engine that I buy in Bochum.
I just did a last test, I put the old distributor with the plug of the shield I put the contact the pump starts 2s! ok
and then I slowly turn the dispenser by hand and the injectors are well distributed. but there is only a small jet for me too little fuel for my engine to run normally.
so the ecu is good!
it's the 044 with wealth trimming

but
It seems that the electronic control unit controls the injectors well, but does not open them !
Last edit: 10 Sep 2019 23:22 by LUX PIERRE.

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11 Sep 2019 00:02 #12237 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Lux-Pierre,
I am sorry but I cannot follow this translation (by Google ?). Can you describe a bit more if I shall answer.
Viele Schraubergrüße - best regards, Dr-DJet Volker
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13 Sep 2019 10:33 #12247 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Good evening,
Sorry to bother you …

This is the story :
This morning, I reassembled the injectors and started the engine for a final test.
Immediately, the engine went very well but goes straight to 2,500 laps.

As a matter of fact, I noticed that I had forgotten to put up the air hose that goes from the cold injector to the butterfly box. (Yes, stupid me!)
So finally my electronic control unit goes perfectly well and the engine was suffocating for a lack of air.

Now I need to understand why, after all the setting back I made, the engine is doing some “bang” and why the cylinders 3 and 4 become very very hot.
Have you any idea of what I am doing wrong ?

I thank you for your patience and again my apologies.

Lux Pierre

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13 Sep 2019 12:29 #12249 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Lux-Pierre,

hot cylinders normally mean a lean mixture or wrrong ignition timing. I do not imagine what you mean by bang.
Viele Schraubergrüße - best regards, Dr-DJet Volker
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15 Sep 2019 23:13 #12256 by Rudiger II
Replied by Rudiger II on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Volker bang = back fire.
Rudiger

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20 Sep 2019 10:43 #12270 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
so I would have to find someone to control my injectors, but I do not know anyone.
and how much does that cost.

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20 Sep 2019 13:01 #12272 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Hi Lux-Pierre,

a backfire normally means wrong ignition timing. You should start to verify there. Injector cleaning is done by ASNU services. I am sure there is someone in Beldium.
Viele Schraubergrüße - best regards, Dr-DJet Volker
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15 Oct 2019 11:28 #12429 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Good morning all

here is news of my Porsche 914 2 L GB of 130 hp

I bought 4 new injectors. and finally she turns, but my lambda tells me that when I put the gas, at times it does not give enough gas.

yet I have a pressure of 2 bars.

so I wonder where can I buy a replacement card for my TPS?

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15 Oct 2019 11:37 #12431 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
on eBay
Viele Schraubergrüße - best regards, Dr-DJet Volker
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30 Oct 2019 20:33 - 30 Oct 2019 20:34 #12557 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
good evening

here I received my new TPS 914 2 L GB
the engine is well tuned, on the slow.
but when I put the gas in the middle regimes, not enough benzine? + - around 2,500 and 3,500 rounds.
but in 4 th no problem everything is fine from 4000 laps.
I do not understand anything anymore ...
does it come from the camshaft ??



www.webcamshafts.com/pages_vehicles/auto...c_002329_001093.html
Last edit: 30 Oct 2019 20:34 by LUX PIERRE.

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30 Oct 2019 21:18 #12559 by nordfisch
Replied by nordfisch on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052

LUX PIERRE wrote: ...
here is news of my Porsche 914 2 L GB of 130 hp
...


Hi,
just noticed this...
Does this mean your engine isn't in original condition, was tuned to 'nominal' 130 hp?

Is the camshaft you posted in the last posting installed?

A D-Jetronic system is 'composed' to run a specific engine with specific parts. The D-Jetronic-system isn't able to detect changes in the engine setup and can't run a modified engine.
You will have to 'compose' a new setup for your modified engine.

Regards
Norbert

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30 Oct 2019 22:12 #12560 by Dr-DJet
Replied by Dr-DJet on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
Exactly,

a modified engine means that your original components do not fit any more. D-Jetronic is an open loop control, not closed loop. Inside ECU there are various function blocks that are adapted to your original engine. One of them is filling curve of your engine. That reflects how much air is really suched into engine at which revs. It is never really 2.0 l, always less. It depends on air flow resistance in manifold and valves etc. You have changed this definitely with a sports cam. how yould the ECU know that?
Viele Schraubergrüße - best regards, Dr-DJet Volker
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30 Oct 2019 22:50 - 30 Oct 2019 22:53 #12562 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
yes the camshaft is installed.

I had heard that on the 912 E
he could pull out 135 hp
Last edit: 30 Oct 2019 22:53 by LUX PIERRE.

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30 Oct 2019 22:55 #12563 by LUX PIERRE
Replied by LUX PIERRE on topic D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052
here i have 9.21:1 de RV
and the new came chaft

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