D-Jetronic Porsche 914 2.0L ECU, Bosch 0280000052

thank you for your advice!

And who can fix that? and at what price?

Thank you.

Hi,

a type 2 MAP sensor with broken diaphragm would enrich the mixture. Here we talk of a too lean mixture if I understand it correctly.

So I ask again:

1. Is it correct MAP sensor?
2. It it with rivets and is poting still original? A MAP sensor with screws or with a suspicious potting can have been detuned.
3. What is the 3 digit number describing month of make on upper right rivet? A middle digit 4 or above is also suspicious as Boschs quality control on MAP sensor tuning in 80s to 2000s decreased
4. And most important: Does it hold vacuum as described in chapter 4 video?

And most important: Does it hold vacuum as described in chapter 4 video?
YES.

i have a lambda inovate 4.9 the top

at 985 rpm the engine is good but lambda at 68 the normal is 8.0
at 2200/2500 no benzine lambda in red.
3000/3500 rpm benzine +-ok lambda 7.8
3800 rpm +- benzine lambda 9.5
after 4000 rpm benzine is good
and higher up in the RPM full benzine

how to put pictures?
the number of my MPS is ; 0280100049

Hi,

really a 049 ? Me and Norbert have written in this thread and I have written it in my ECU and MAP sensor article: A 044 or 052 ECU needs a 043 MAP sensor ! :RTFM: That was my 4th post in this thread. 049 is for 1.7 engine.

Please check all your components. Which color do your injectors have?

Hi,

however it cannnot be the only fault. A 049 is richer than a 043. As I ran into another case on a 914 2.0 once: Please check that you have green injectors and not yellow ones. He also had yellow injectors and 049 MAP sensor.

And Lambda is a figure around 1 ... An engine with lambda 68 would not run. Even with air to fuel ration that would be difficult.