 Djet running way too rich... Still! |
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| Halfnelson |
 Jun 20 2024, 03:33 AM
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Member  Group: Members Posts: 66 Joined: 31-July 17 From: Cornwall Member No.: 21,303 Region Association: England  |
Had a previous thread starting in 2022 about my 73 1.7 standard D-Jet running way too rich and flooding to the point where it wouldn't start. It's been an ongoing issue. I've had a go. 2 garages have had a go. I'm at the point where I'm beginning to lose hope.
A recap. Bought the car 2021, had a problem with intermittent flooding. So far have: Checked MPS - holding vacuum. Replaced CHT sensor and tested. Working when flooded. Replaced fuel pump and tested pressure. Replaced all vacuum hoses and tested for leaks. Valves set and rechecked. New 123 distributor. New injectors. Each time I think I've cracked it and it runs and drives - sometimes for a month or so. Then I'll go to start it and it'll flood again to the point where it contaminates the oil. I feel like I've never managed to get to the bottom of the problem. Just keep replacing parts. Thinking maybe a return line that intermittently blocks? I'm kind of at a loss. |
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| technicalninja |
Jun 22 2024, 03:59 PM
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Advanced Member Group: Members Posts: 2,531 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region 
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Made me think...
An ECU that did short the injectors to ground, intermittently, might be able to create what is occurring. It's another easy test for me. Get a Noid light/injector pulse tester. https://www.amazon.com/PANNUOSCS-Light-Inje...mp;gad_source=1 Plug the appropriate size into injector harness. Burn when ignition on/engine off? Bad ECU or intermittent short to ground in wiring harness (it IS 50 years old!) Note: I'm novice at D-Jet but Master at L-Jet and modern. Sometimes I give poor advice on D-Jet stuff. Take my advice with a grain of salt. I am trying to help. |
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Posts in this topic
Halfnelson Djet running way too rich... Still! Jun 20 2024, 03:33 AM
emerygt350 Have you removed the cold start valve from the equ... Jun 20 2024, 04:20 AM
Halfnelson
Have you removed the cold start valve from the eq... Jun 20 2024, 04:51 AM JeffBowlsby The MPS holding vacuum is not a definitive test. ... Jun 20 2024, 06:01 AM Halfnelson
The MPS holding vacuum is not a definitive test. ... Jun 20 2024, 06:31 AM Halfnelson
The MPS holding vacuum is not a definitive test.... Jun 20 2024, 06:33 AM JeffBowlsby
Also would that present as an intermittent issue... Jun 20 2024, 07:11 AM Halfnelson
Also would that present as an intermittent issu... Jun 20 2024, 07:19 AM JeffBowlsby
The MPS holding vacuum is not a definitive test.... Jun 20 2024, 07:10 AM emerygt350 It could. Just depends on how it is cracked. I k... Jun 20 2024, 06:40 AM emerygt350 If you get the rebuild kit from Chris it is super ... Jun 20 2024, 08:35 AM StarBear
If you get the rebuild kit from Chris it is super... Jun 20 2024, 09:16 AM emerygt350 I wonder about the ECU... They rarely go but perh... Jun 20 2024, 08:37 AM rjames
I wonder about the ECU... They rarely go but per... Jun 20 2024, 09:10 AM rjames double post Jun 20 2024, 09:10 AM emerygt350 I have a known working extra 037 from my 73 2.0. ... Jun 20 2024, 09:15 AM FlacaProductions What MPS do you currently have? I believe a 73 1.... Jun 20 2024, 09:34 AM 914_teener
What MPS do you currently have? I believe a 73 1... Jun 20 2024, 11:02 AM emerygt350
What MPS do you currently have? I believe a 73 ... Jun 20 2024, 03:06 PM JamesM
[quote name='914_teener' post='3152016' date='Jun... Jun 20 2024, 04:18 PM Ishley It sounds a lot like you're having ignition a... Jun 20 2024, 11:55 AM FlacaProductions Agreed on MPS tuning - that's a whole differen... Jun 20 2024, 12:47 PM emerygt350 My point was, he could borrow my ECU. Jun 20 2024, 04:26 PM JamesM
My point was, he could borrow my ECU.
If you wa... Jun 20 2024, 09:45 PM 914_teener I'm with Jeff. This is a common failure mode o... Jun 20 2024, 10:01 PM rjames The ECU is the easiest thing to test first. Move t... Jun 20 2024, 11:09 PM emerygt350 The intermittent cht is an interesting idea but it... Jun 21 2024, 05:14 AM ClayPerrine For years the rule of thumb was "The ECU neve... Jun 21 2024, 05:28 AM JeffBowlsby While the idea of swapping in 'known good... Jun 21 2024, 05:32 AM ClayPerrine
While the idea of swapping in 'known good... Jun 21 2024, 07:19 AM emerygt350 If cost is no issue, definitely send it out for te... Jun 21 2024, 06:31 AM emerygt350 Just a quick mention on the TPS, although I really... Jun 21 2024, 06:33 AM dr914@autoatlanta.com substitution is your friend. That is what we do he... Jun 21 2024, 08:22 AM Halfnelson Thanks so much for the suggestions. I’ve been th... Jun 22 2024, 04:27 AM Halfnelson I’m not sure if this is relevant but when it doe... Jun 22 2024, 04:32 AM ClayPerrine
I’m not sure if this is relevant but when it do... Jun 22 2024, 04:39 AM emerygt350 Ahh, Cornwall, just noticed that.
Can you descr... Jun 22 2024, 04:53 AM Halfnelson Although the cht has been changed and I’ve teste... Jun 22 2024, 05:13 AM ClayPerrine
Although the cht has been changed and I’ve test... Jun 22 2024, 06:27 AM technicalninja What he's describing appears to be fuel foulin... Jun 22 2024, 03:47 PM emerygt350 Pressure Regulator on these is static. The wet pl... Jun 22 2024, 04:03 PM Halfnelson Do you recommend pulling a plug, checking, and the... Jun 23 2024, 05:08 AM emerygt350 Yeah, check first and then after if it doesn't... Jun 23 2024, 06:01 AM Halfnelson OK, a quick update on the richness / flooding / no... Aug 1 2024, 11:54 AM 914_teener
OK, a quick update on the richness / flooding / n... Aug 1 2024, 12:34 PM Halfnelson
My car did this when I first got it.
An MPS b... Aug 1 2024, 02:03 PM Ishley Somehow you’re getting too much fuel. Have you t... Aug 1 2024, 12:06 PM ClayPerrine Have you checked the cold start injector to see if... Aug 1 2024, 01:40 PM emerygt350 That intermittent rich makes me think MPS as well.... Aug 1 2024, 03:50 PM rjames MPS or ECU.
These are the exact symptoms I had an... Aug 1 2024, 03:59 PM Dave_Darling I had an ECU that would open the injectors, but no... Aug 1 2024, 08:37 PM Halfnelson
I had an ECU that would open the injectors, but n... Aug 2 2024, 07:35 AM rjames
I had an ECU that would open the injectors, but ... Aug 2 2024, 10:21 AM JeffBowlsby
...but I can only remember one specific instance ... Aug 2 2024, 01:43 PM Halfnelson
...but I can only remember one specific instance... Aug 5 2024, 08:35 AM JeffBowlsby Of course, that should work and ideally it should ... Aug 5 2024, 08:51 AM Halfnelson
Of course, that should work and ideally it should... Aug 5 2024, 10:04 AM Halfnelson Got a package in the post yesterday from the US wi... Aug 22 2024, 12:03 AM ctc911ctc Jeff is the best - and despite his modesty, he IS ... Aug 22 2024, 07:01 AM Halfnelson
Jeff is the best - and despite his modesty, he IS... Aug 22 2024, 08:54 AM StarBear Yay!! :Qarl: Aug 22 2024, 06:20 AM rjames :beer2: Aug 22 2024, 08:28 AM JeffBowlsby Happy Daze! Glad to have helped. Aug 22 2024, 09:33 AM GregAmy Anyone with D-Jet that has not replaced the diaphr... Aug 22 2024, 09:57 AM emerygt350 Excellent news! Aug 22 2024, 12:35 PM |
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