D-Jet ECU |
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D-Jet ECU |
Bobco |
Apr 16 2018, 11:13 AM
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#1
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Newbie Group: Members Posts: 35 Joined: 10-May 17 From: Butler pa Member No.: 21,091 Region Association: North East States |
Hi World
Will a D Jet ECU for a 2 Liter work for a 1.7 Liter Also dJet? Thanks |
914_7T3 |
Apr 16 2018, 11:17 AM
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#2
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Please forgive me, I'm new to all of this! Group: Members Posts: 1,846 Joined: 3-April 17 From: Los Angeles, CA Member No.: 20,991 Region Association: Southern California |
It may on some '72-'73 cars. Verify here by part #
https://members.rennlist.com/pbanders/DJetParts.htm |
mepstein |
Apr 16 2018, 12:57 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,234 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
You should be able to get the correct one for ~ $50
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Mueller |
Apr 16 2018, 01:25 PM
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#4
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
I have a complete 1.7 (?) D-jet setup that I am putting up for sale in the classifieds.
This is the ECU for it. |
mgphoto |
Apr 17 2018, 04:48 PM
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#5
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"If there is a mistake it will find me" Group: Members Posts: 1,335 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
Not a very good idea to mix and match D-Jet parts.
I would call the D-Jet system a comparative system. There is no real feedback to the ECU from any sensors. All the ECU does is take in signals from the sensors and compare those to on board pre-programmed data, all in analog form. Example the head temp sensor, it's resistance is compared to an on board resistance and the increase or decrease changes the pulse length of the injectors. Mixing the components will cause tuning problems and fuel consumption issues. The Bosch engineers used real data to set up the D-Jet ECU, but not until the introduction of stuff like the O2 sensor did the engine start telling the ECU what might be happening. Once you have assembled the correct collection of parts for a particular "year" than you will be able to tune the system making predictable adjustments. All of the parts necessary for a complete system are available, there were thousands of D-Jets made and some more desirable items may cost more and others cheap and abundant. |
JeffBowlsby |
Apr 17 2018, 05:12 PM
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#6
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914 Wiring Harnesses Group: Members Posts: 8,477 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
The above post is confusing. This statement is not true that "There is no real feedback to the ECU from any sensors."
D-Jet is an "open loop" FI system, receives data (feedback) from its sensors and calculates pulse width to match demand based on that data. A "closed loop" system includes an O2 sensor(s) which additionally monitors exhaust gas characteristics to match demand and is more advanced than D-Jet. D-Jet cannot really be and is not intended to be 'tuned' per se. The components are 'fixed' to the average owner - its Plug N Play only - so the statement "Once you have assembled the correct collection of parts for a particular "year" than you will be able to tune the system making predictable adjustments" is also not a good characterization. The beauty of D-Jet is its simplicity and that as long as individual components, which can be individually tested, are good, the system works. No 'tune-ups' or alignments adjustments are needed other than the basic engine mechanical, fuel pressure, idle mixture and air mixture settings. |
mgphoto |
Apr 17 2018, 05:32 PM
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#7
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"If there is a mistake it will find me" Group: Members Posts: 1,335 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
The above post is confusing. This statement is not true that "There is no real feedback to the ECU from any sensors." D-Jet is an "open loop" FI system, receives data (feedback) from its sensors and calculates pulse width to match demand based on that data. A "closed loop" system includes an O2 sensor(s) which additionally monitors exhaust gas characteristics to match demand and is more advanced than D-Jet. D-Jet cannot really be and is not intended to be 'tuned' per se. The components are 'fixed' to the average owner - its Plug N Play only - so the statement "Once you have assembled the correct collection of parts for a particular "year" than you will be able to tune the system making predictable adjustments" is also not a good characterization. The beauty of D-Jet is its simplicity and that as long as individual components, which can be individually tested, are good, the system works. No 'tune-ups' or alignments adjustments are needed other than the basic engine mechanical, fuel pressure, idle mixture and air mixture settings. Except if you modify your engine, but who does that! You are mistaking feed for "feedbacK" the sensors only feed info to the ecu, no date is feed back to the unit for modification of the signal, as you say it is basic but it can be "modified"or tuned for a specific engine. |
Bobco |
Apr 21 2018, 06:29 PM
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#8
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Newbie Group: Members Posts: 35 Joined: 10-May 17 From: Butler pa Member No.: 21,091 Region Association: North East States |
My car is a 71. 1.7. I did find my ecu was not working correctly by using a 74. 2.0 ecu.I would like to know if I should try to source the original 1.7 ecu without the idle enrichment knob or get one like the one I used to find my part was bad? Thanks Bobco
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yellowporky |
Apr 21 2018, 07:19 PM
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#9
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Member Group: Members Posts: 422 Joined: 18-October 09 From: Martinez, Ca. Member No.: 10,948 Region Association: Northern California |
If this will work for you i have it available.
http://www.914world.com/bbs2/index.php?sho...=313564&hl= Chris |
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