D-jet question

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Naito

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Hi all
I have a 1973 3.0CSL that ran fine until I changed from Carb to Injection system.
Has any one had a similar experience?
The car would not start because fuel doesn't come to injectors.
I have confirmed that fuel come to cold start valve when I start ignition on but, when I started starter motor on, fuel doesn't come to injectors.
fuel pressure seems OK (60ftp).
ECU has changed to New one, MPS has rebuilt at Automotive Tradition Bosch.
aftermarket injection wiring harness which is in good condition.
OEM ignition distoributor made by 123.com. I could confirm the fire reached spark plug.
New cold start relay.
Old stock main relay (starter motor relay).
Throttle sensor is working poperly.

and now I plan to buy OEM main relay once again. ( I suspect that doesn't work properly)

I am happy if you could advise me which point do I have to check on it.

thanks and best regards Naito
 
Hi Naito, I have a similar problem with my CSI. There is a small brass filter in the inlet of the fuel pump I am trying (unsuccessfully so far) to remove and clean. I don't know if you have one with this setup, but it's something else to check.

It's a delicate part, and I'm sure I read somewhere, no longer available.

Good luck.

Regards,

Damien
 
damienh said:
Hi Naito, I have a similar problem with my CSI. There is a small brass filter in the inlet of the fuel pump I am trying (unsuccessfully so far) to remove and clean. I don't know if you have one with this setup, but it's something else to check.

It's a delicate part, and I'm sure I read somewhere, no longer available.

Good luck.

Regards,

Damien
Click to expand...
Thanks a lot Damien.
Can I ask you something? Was your fuel pump new or used one?
My fuel pump was for carb spec, so I have replaced it for injector spec. Do you think do I need check the pum even new
 
What specific fuel pump are you running?
I've been running an E28 fuel pump for 5 years, it's BMW part number 16141178751, need to put a filter before the pump inlet.
Injected CSL fuel pressure should read 35 on a fuel pressure gauge, a regular CSi should read 29.

If your ECU and MAP sensor are not the same dot code they will not play well together.

You should be running the 123 BMW-6-R-V-IE, http://123ignitionusa.com/123-bmw-6-r-v-ie-switched-for-6-cyl-bmw-engines-with-d-jetronic-injection/

Wiring harness could be at fault or wires to injectors are not on the correct injectors.
Are you using new or used injectors? Have they been tested?
 
Naito,
Thanks to the courtesy of another forum member, I have the Bosch manual for the E9 d-jet system. I'd be happy to email to you if you don't have. It could be of help.

It would be interesting to learn more about your project. I'm assuming a previous owner put carbs into a car that originally had fuel injection. Have you had to buy a whole new D-jet system? Are you doing this yourself? Or have a mechanic who knows d-jet?
Good luck!
Paul
 
adawil2002 said:
What specific fuel pump are you running?
I've been running an E28 fuel pump for 5 years, it's BMW part number 16141178751, need to put a filter before the pump inlet.
Injected CSL fuel pressure should read 35 on a fuel pressure gauge, a regular CSi should read 29.

If your ECU and MAP sensor are not the same dot code they will not play well together.

You should be running the 123 BMW-6-R-V-IE, http://123ignitionusa.com/123-bmw-6-r-v-ie-switched-for-6-cyl-bmw-engines-with-d-jetronic-injection/

Wiring harness could be at fault or wires to injectors are not on the correct injectors.
Are you using new or used injectors? Have they been tested?
Click to expand...

Hi Andrew
thanks so much for your advise.
actually I have bought OEM New fuel pump for 628 CSi 1977 up to 1982. the differences between E9 3.0CSi/CSL and 628Csi is only connector's location. so, supplier has mentioned to me that I can use that pump instead of original pump.
and Injectors are all New (OEM )
Can you explain me what is the "MAP sensors"? I have't checked the Dot code of ECU and "Map Sensor" yet. but I don't know where the Map sensor is located on the car...

thank you Naito
 
twistinglane said:
Naito,
Thanks to the courtesy of another forum member, I have the Bosch manual for the E9 d-jet system. I'd be happy to email to you if you don't have. It could be of help.

It would be interesting to learn more about your project. I'm assuming a previous owner put carbs into a car that originally had fuel injection. Have you had to buy a whole new D-jet system? Are you doing this yourself? Or have a mechanic who knows d-jet?
Good luck!
Paul
Click to expand...

thanks for your kind message Paul
it would be very helpful if you could send me the Bosch manual for E9 D-jet. I purchased the 3.0CSL in this summer. my CSL was originally delivered as injection system from the factory but, previous owner expalined to me that the car has replaced to carb spec before he purchase. and he began to collecting the some D-jet parts but, He gave up at some point.
he has had inlet manifold, broken ECU, broken MPS, rusty injectors. I needed to find out most of D-jet parts and I found a friend who is familiar about E9 through this forum. Simon is based in Australia and he help me out of my trouble. I was not able to do this project without his assist.
yes, I am doing this my self !

My best naito
 
Naito,

Sounds like you have the correct fuel pump. Glad you have new injectors.
The MAP, Manifold Air Pressure sensor, is the round module on the back of the brake booster bracket and below the radiator overflow tank. This works in conjunction with the ECU and Throttle Position Switch on the throttle body from my understanding.

I see that Paul, twistinglane, is going to get you a D-Jet manual. That will be a big help.
 
adawil2002 said:
Naito,

Sounds like you have the correct fuel pump. Glad you have new injectors.
The MAP, Manifold Air Pressure sensor, is the round module on the back of the brake booster bracket and below the radiator overflow tank. This works in conjunction with the ECU and Throttle Position Switch on the throttle body from my understanding.

I see that Paul, twistinglane, is going to get you a D-Jet manual. That will be a big help.
Click to expand...

Thank you Andrew. I understand the "Map Sensor". I will check if these are the same dot code. (I hope it will be OK!)
I am happy if you could advise me anything about E9. I am new at classic BMW.
My best naito
 
Hi again Andrew
A Map sensor number is 0280100030 and ECU is 0280001007.
Is these number as "Dot code"?
Do you think does these items not suitable?

My Best Naito
 
Naito,
Please send me your email by personal messenger and I'll email you the D-jet manual. Its too big to attach here. I've also sent it to Dan G to consider hosting here. Thanks are due to Christopher Scott who shared it with me.

You do have the right MAP sensor and ECU - or at least those are the right numbers for the CSI and I think the CSL is the same. About the "red dot". It was actually some red paint applied to the components to indicate a"good match" - there were other colors too. But I bet Bosch isn't using this color code anymore for rebuilt units. And I don't think it would affect starting.
I'm sure you will meet with success!
Paul
 
Understand that if your MAP is broken that the car will not start.
Understand the the wires are numbered and must match the plug and MAP
The can go in backwards
 
sfdon said:
Understand that if your MAP is broken that the car will not start.
Understand the the wires are numbered and must match the plug and MAP
The can go in backwards
Click to expand...

Hi Don
I'm working on it today. I managed to start the engine but, it's not properly
when I turned ignition on over and over, the engine doesn't start.
and then I took the throttle position sensor off from throttle body and put lubricant and fixed it again,
the engine has started somehow.
but, it was unstable and I don't get feedback when I did acceration.
so, I beleive this issue comes from throttle position sensor.
(that is very poor condition...) please let me know your thoughts.
My Best Naito
 
twistinglane said:
Naito,
Please send me your email by personal messenger and I'll email you the D-jet manual. Its too big to attach here. I've also sent it to Dan G to consider hosting here. Thanks are due to Christopher Scott who shared it with me.

You do have the right MAP sensor and ECU - or at least those are the right numbers for the CSI and I think the CSL is the same. About the "red dot". It was actually some red paint applied to the components to indicate a"good match" - there were other colors too. But I bet Bosch isn't using this color code anymore for rebuilt units. And I don't think it would affect starting.
I'm sure you will meet with success!
Paul
Click to expand...

Paul
thanks so much for your information. unfortunately I couldn't see any "Red dot" on the MAP sensor and ECU. but as I wrote above, I managed to start the engine! I still need to work on it but, it was big one step for me!
my e-mail address is [email protected]
I am happy if you send me the manual for E9 D-jet! I especially need to check the electrical line between ECU and Throttle position sensor.
Very Best Naito
 
I'm sorry- I don't know where to buy TPS units new right now!
 
Maybe check out your TPS before giving up on it. See the Dr D jet site for good information.

https://oldtimer.tips/index.php/en/d-jetronic/58-throttleswitch

But it seems you are having problems getting an ok idle -and the TPS doesn't have much work to do at that point.
At idle -no throttle- wire 17 from the ECU should be connected to ground through the TPS. And that circuit should open once the throttle is depressed. If that doesn't check out, test the function of the TPS by itself. Also look at information on rotating the TPS for the idle adjustment.
 
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Run a vacuum test on your MAP

You have your white wire hooked up?
 
The white wire which i am pointing is comes from main relay.
 

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