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914World.com _ 914World Garage _ GB: D-Jet ECU testing session UPDATE
Posted by: JeffBowlsby Nov 8 2022, 09:34 AM
I am holding a D-Jet ECU testing session on November 26, using my VW-128 tester. This is for the 1.7L and 2.0L cars only. The tester is an interposer configuration and I use an NOS 049 MPS interposed with your ECU to test them together to evaluate all ECU functions.
6 ECUs are currently in the queue for testing.
The cost is $125. + return shipping cost with a brief report of what was tested and its results. I do these in batches to minimize set-up time and cost. If you send it to me by Nov 26, I can include it. Paypal preferred, checks also accepted.
If interested send me your zip code and email address by PM for a full quote with shipping cost.
Posted by: friethmiller Nov 8 2022, 01:13 PM
Jeff, I've got 4 ECUs that need testing. Will send in one box. PM with Zip sent.
Posted by: TX914 Nov 9 2022, 06:45 AM
Does testing include the CO adjustment knob on the ECU? I have an ECU from a 76 (0 280 000 052) where the knob seems to have no effect unless full clockwise (TPS properly adjusted). If testing indicates bad, can that potentiometer be replaced?
Posted by: JeffBowlsby Nov 9 2022, 10:34 AM
Does testing include the CO adjustment knob on the ECU? I have an ECU from a 76 (0 280 000 052) where the knob seems to have no effect unless full clockwise (TPS properly adjusted). If testing indicates bad, can that potentiometer be replaced?
The VW1218 tests the ECU in functional blocks (circuits). The idle AFR pot is part of one of the circuits tested, but the pot is not discretely tested in this process. If that circuit block is found to be defective then the pot can be removed, tested and replaced if its bad, but I do not do ECU repairs.
Posted by: dr914@autoatlanta.com Nov 9 2022, 11:40 AM
Jeff can you actually test a control unit without also having it installed on the car? The old tester we had needed to be hooked up inbetween the control unit and the the factory control unit wiring harness.
I am holding a D-Jet ECU testing session on November 26, using my VW-128 tester. This is for the 1.7L and 2.0L cars only. The tester is an interposer configuration and I use an NOS 049 MPS interposed with your ECU to test them together to evaluate all ECU functions.
6 ECUs are currently in the queue for testing.
The cost is $125. + return shipping cost with a brief report of what was tested and its results. I do these in batches to minimize set-up time and cost. If you send it to me by Nov 26, I can include it. Paypal preferred, checks also accepted.
If interested send me your zip code and email address by PM for a full quote with shipping cost.
Posted by: JeffBowlsby Nov 9 2022, 12:00 PM
[quote name='dr914@autoatlanta.com' date='Nov 9 2022, 09:40 AM' post='3040448']
Jeff can you actually test a control unit without also having it installed on the car? The old tester we had needed to be hooked up inbetween the control unit and the the factory control unit wiring harness.
They are tested as installed into a D-Jet car. All the testers require to be interposed into the FI system.
Posted by: rjames Nov 9 2022, 03:34 PM
Great service you're offering Jeff.
On a related note, I would love to hear recommendations based on actual experience for where the ECUs can be rebuilt.
I have one that is bad (causes the car to go rich and stall) but testing may not reveal anything wrong because it only happens intermittently. As the ECUs are getting harder to find I'd like to try and get it repaired so I have a spare. Although narrowing down what needs to be fixed on it would probably be difficult given the issue is intermittent.
Posted by: JeffBowlsby Nov 28 2022, 06:19 PM
Had a great turn out for this testing session. I ended up with 17 D-Jet ECUs in total to evaluate. The VW1218 tester does an excellent job of evaluating the ECU functions in 9 separate sectors and tests the sectors individually. I also provide a summary report indicating which sectors are good/bad, but basically for each ECU with a bad sector, the tester manual recommends that the ECU be replaced.
4 ECUs turned out to have one or more bad sectors, but 3 of the bad ones were previously known to be defective and were from my stash.
Thanks to everyone who participated I hope you will find peace of mind knowing whether your ECU is good (or bad) and the information generally useful.
One thing that was interesting was that one of the ECUs that had one or more bad sectors actually functioned well...because I ran my 2.0L with it. So just because you might think an ECU is good...it might not be.
I will plan another one of these sessions in the spring for anyone interested.
Attached image(s)
Posted by: Quinn Moore Nov 29 2022, 07:33 AM
Great, I'll be on the spring run. (Missed this one, due to car being in the shop).
QM
Posted by: rudedude Nov 29 2022, 08:21 AM
Bosch D-Jetronic factory fuel injection tester. There is one of these for sale on craigslist near where I live if anyone is interested. Not to take anything away from Jeff's service but I can't believe there are many left.
Posted by: friethmiller Nov 29 2022, 09:00 AM
Jeff,
Thanks for offering this service. Just got your message about my ECU (it passed). You are more than welcome to restore my ECU case before sending it back. 
Kidding! Looking forward to doing that part myself.
Posted by: JeffBowlsby Nov 29 2022, 10:52 AM
Bosch D-Jetronic factory fuel injection tester. There is one of these for sale on craigslist near where I live if anyone is interested. Not to take anything away from Jeff's service but I can't believe there are many left.
The equipment I used for this is actually a Grundig tester AKA VW1218, not Bosch. I have a Bosch tester also but it tests the FI system and it’s components in a different way and does not evaluate the ECU to the level of detail as the VW1218.
Posted by: friethmiller Nov 29 2022, 11:10 AM
Any recommendations on cleaning up/restoring the ECU case? I've seen them painted gray but want to keep it unpainted/original.
Posted by: TonyA Nov 29 2022, 04:49 PM
I would like to know that answer as well?
Posted by: rjames Nov 29 2022, 04:53 PM
What are the 9 sectors in an ECU?
Posted by: friethmiller Nov 30 2022, 08:17 AM
I would like to know that answer as well?
Might be like restoring the 914 horn. I used a Dremel with a mini-wire brush on it. Turned out pretty good.
Posted by: JeffBowlsby Nov 30 2022, 02:15 PM
What are the 9 sectors in an ECU?
Attached image(s)
Posted by: JeffBowlsby Nov 30 2022, 02:15 PM
I would like to know that answer as well?
Might be like restoring the 914 horn. I used a Dremel with a mini-wire brush on it. Turned out pretty good.
Looks great!
Posted by: seanpaulmc Jan 25 2023, 05:45 PM
Missed this tread entirely! 
I have two boxes for your Spring run. Look forward to hearing about it. Thanks, Jeff!
-Sean
Had a great turn out for this testing session. I ended up with 17 D-Jet ECUs in total to evaluate. The VW1218 tester does an excellent job of evaluating the ECU functions in 9 separate sectors and tests the sectors individually. I also provide a summary report indicating which sectors are good/bad, but basically for each ECU with a bad sector, the tester manual recommends that the ECU be replaced.
4 ECUs turned out to have one or more bad sectors, but 3 of the bad ones were previously known to be defective and were from my stash.
Thanks to everyone who participated I hope you will find peace of mind knowing whether your ECU is good (or bad) and the information generally useful.
One thing that was interesting was that one of the ECUs that had one or more bad sectors actually functioned well...because I ran my 2.0L with it. So just because you might think an ECU is good...it might not be.
I will plan another one of these sessions in the spring for anyone interested.
Posted by: emerygt350 Jan 25 2023, 09:36 PM
Is this going to happen before the salt is off the roads? Also... If something is broken, is there anything that can be done or is it just find a good one?
Posted by: JeffBowlsby Jan 26 2023, 12:06 AM
Is this going to happen before the salt is off the roads? Also... If something is broken, is there anything that can be done or is it just find a good one?
I calendared a prompt for April but we can do it most any convenient time with a couple weeks to organize it ad collect the ECUs. Just need to do more than a few to justify the equipment set-up time. If an ECU is dead or unfunctional in some way, just replace it. I tested 16 last time and only 1 was bad.
Anyone who is interested please post that here in this thread.
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