 D-Jet Conversion not going as planned., Car starts but will not run. |
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| slapshot |
 Oct 18 2024, 03:08 PM
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Member  Group: Members Posts: 146 Joined: 11-June 23 From: Utah Member No.: 27,409 Region Association: Rocky Mountains 
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I am converting back to D-Jet and my car will start but dies right after. It will not rev up applying throttle. I have a 1975 914 2.0. It was running great with Weber 40s prior.
The D-Jet system is from a 1974 2.0. All the parts came in visibly good condition. TPS calibrates good, AAV tested good, Thermo sensor good, air intake temp sensor good, and a new cylinder head temp sensor. The only test that I think is failing is the vacuum test on the MPS. It leaks. https://www.youtube.com/watch?v=nnuLoht8Fbw The MPS has also been rebuilt at some point. The original part # has been removed. There's a good chance it is not calibrated for my car. I have all new vacuum hose and fuel pressure is between 28 and 30. I don't have any tools to calibrate the MPS. Should I try turning the inner screw on the MPS to see if it helps? Or should I send it to someone to have it rebuild again and recalibrated? If the later do you have any recommendations on who to send it to? |
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Posts in this topic
slapshot D-Jet Conversion not going as planned. Oct 18 2024, 03:08 PM
slapshot I have the original green injectors.
I ordered a... Oct 28 2024, 12:18 PM emerygt350 Yeah, the new fj67s are so good and cheap it's... Oct 28 2024, 03:08 PM slapshot Since its sounds like its running ruff, I'm ba... Oct 28 2024, 07:27 PM slapshot I got curious and checked the flywheel. There... Oct 28 2024, 08:38 PM
930cabman
I got curious and checked the flywheel. There... Oct 29 2024, 12:18 PM slapshot
I got curious and checked the flywheel. There... Oct 29 2024, 01:09 PM slapshot After setting timing on the flywheel it purrs so s... Oct 28 2024, 09:49 PM emerygt350 That sounds great! Oct 29 2024, 09:24 AM rbj914 Sounds great. Where did your idle end up? Oct 29 2024, 12:17 PM slapshot
Sounds great. Where did your idle end up?
After ... Oct 29 2024, 01:06 PM FlacaProductions Way to stick with it. You also took advice and po... Oct 29 2024, 01:56 PM Artfrombama Hope you enjoy your teener as much as I've enj... Oct 29 2024, 07:31 PM slapshot
Way to stick with it. You also took advice and p... Oct 31 2024, 12:26 AM emerygt350 Aar works but it's kind of annoying. In upsta... Oct 29 2024, 07:34 PM slapshot I tested the AAR at cold startup. I plugging the ... Oct 31 2024, 12:26 AM emerygt350 I find the aar puts it up around 1500 on mine cold... Oct 31 2024, 04:59 AM slapshot My ECU idle knob probably isn't correct anymor... Oct 31 2024, 06:36 AM JeffBowlsby A great learning process, I have been watching fro... Oct 31 2024, 08:34 AM emerygt350 That ECU you have should a little mark, normally j... Oct 31 2024, 09:10 AM rjames Great progress!
As emerygt350 stated, aim for... Oct 31 2024, 09:47 AM slapshot This is the only mark I see. I'll turn it to ... Oct 31 2024, 09:31 PM emerygt350 That is the mark you are looking for. It really i... Nov 1 2024, 04:58 AM slapshot The car is running great. I did buy a new circuit... Nov 3 2024, 12:05 AM emerygt350 Good news. And when you get around to the mps, do... Nov 3 2024, 06:28 PM slapshot So after a month plus of driving this cool car of ... Dec 21 2024, 02:45 PM JeffBowlsby Stumbling? Have you added a drop or two of 30 wt ... Dec 21 2024, 03:40 PM slapshot
Stumbling? Have you added a drop or two of 30 wt... Dec 21 2024, 05:27 PM FlacaProductions
Stumbling? Have you added a drop or two of 30 w... Dec 21 2024, 06:54 PM JeffBowlsby Duble duble. Dec 21 2024, 03:40 PM emerygt350 Is it a steady throttle stumble at cruise or is it... Dec 21 2024, 05:21 PM slapshot
Is it a steady throttle stumble at cruise or is i... Dec 21 2024, 05:30 PM DC_neun_vierzehn
[quote name='emerygt350' post='3182562' date='Dec... Dec 28 2024, 11:10 AM emerygt350 Steady state stumble and disconnecting the TPS mak... Dec 22 2024, 07:07 AM slapshot My startup test tonight with TPS disconnected. Bl... Dec 22 2024, 10:13 PM emerygt350 That startup seems dead on. I don't think the... Dec 23 2024, 06:29 AM slapshot Here's the plugs. This is the worse I've ... Dec 28 2024, 09:34 AM Spoke
Here's the plugs. This is the worse I've... Dec 28 2024, 11:14 AM Superhawk996
Fuel Economy & Spark Plugs
My fuel economy is... Dec 28 2024, 12:42 PM dr914@autoatlanta.com any time you need 914 help and guidance I am just ... Dec 28 2024, 09:59 AM slapshot Thanks George. I've talked to you a couple of... Dec 28 2024, 10:15 AM slapshot @[url=http://www.914world.com/bbs2/index.php?showu... Dec 28 2024, 05:05 PM Superhawk996
One concerning thing I found was with the CHT s... Dec 28 2024, 10:15 PM slapshot
You either have a bad CHT sensor or some other so... Dec 29 2024, 01:13 AM r_towle First fun fact. Djet runs rich by design. Aircoole... Dec 28 2024, 05:28 PM slapshot
First fun fact. Djet runs rich by design. Aircool... Dec 28 2024, 05:45 PM r_towle
First fun fact. Djet runs rich by design. Aircoo... Dec 29 2024, 03:00 PM emerygt350
[quote name='slapshot' post='3183656' date='Dec 2... Dec 29 2024, 03:06 PM Superhawk996 Hmm
Let me noodle on this for a bit. I believe ... Dec 29 2024, 02:56 AM emerygt350 If those sooted up plugs are from idle, it could b... Dec 29 2024, 05:40 AM slapshot No worries @Superhawk996 . I did measure 1.xx so... Dec 29 2024, 10:03 AM Superhawk996
No worries [b]@[url=http://www.914world.com/bbs2... Dec 29 2024, 01:00 PM Tom_in_NH My 76 2.0 has the occasional stumble at steady-sta... Dec 29 2024, 11:26 AM slapshot
My 76 2.0 has the occasional stumble at steady-st... Dec 29 2024, 01:37 PM emerygt350
My 76 2.0 has the occasional stumble at steady-st... Dec 29 2024, 02:11 PM rjames Don’t discount the MPS as a possible contributor... Dec 29 2024, 01:53 PM r_towle If I remember right.
MPs adjustment
TPS adjustment... Dec 29 2024, 06:08 PM emerygt350 I find the inner screw on mps can be very sensitiv... Dec 29 2024, 07:25 PM Spoke
The D-Jet system is from a 1974 2.0. All the par... Dec 30 2024, 10:15 AM slapshot I tested the injectors and found that injector #3 ... Jan 1 2025, 12:03 AM Superhawk996 :trophy: Things are looking up.
Drive it hard w... Jan 1 2025, 12:41 AM slapshot Here's a pic of the plugs after an hour driver... Jan 1 2025, 10:33 AM Superhawk996 There you go!!! :D Jan 1 2025, 02:05 PM 930cabman where will your A/F gauge be plugged in? so far as... Jan 1 2025, 03:48 PM slapshot
where will your A/F gauge be plugged in? so far a... Jan 1 2025, 04:26 PM emerygt350 I have mine in the outer pipe on the muffler passe... Jan 1 2025, 06:48 PM emerygt350 Oh, and without the TPS your ECU may not know if i... Jan 1 2025, 07:02 PM slapshot
I have mine in the outer pipe on the muffler pass... Jan 2 2025, 01:42 PM emerygt350 Yep, those are good instructions. It's just t... Jan 2 2025, 02:03 PM rjames As others have said, don’t worry too much about ... Jan 2 2025, 02:25 PM slapshot I have the stock exhaust without the catalytic con... Jan 2 2025, 02:48 PM emerygt350 Wow, that is nothing like what I am used to. Just... Jan 2 2025, 05:35 PM JeffBowlsby That looks like a BURSCH exhaust, with the 49-stat... Jan 2 2025, 07:15 PM slapshot Yeah, mine's a none CA car. CAT didn't com... Jan 2 2025, 09:50 PM  |
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