 Help - Djet running way too rich |
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| Halfnelson |
 Jul 23 2021, 06:51 AM
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#1
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Member  Group: Members Posts: 72 Joined: 31-July 17 From: Cornwall Member No.: 21,303 Region Association: England  |
Help - my new to me 1973 1.7 Djet came running really sweet, but almost immediately developed the 'hunting tick-over' of lean running / air leak. We replaced all the vacuum pipes, found one of the inlet gaskets had a very slight leak. Seems somewhere along the line things have been tweaked to compensate for the leaks so that now they're cured, the car is running super rich. Having had a L-jet for years the Djet is new to me so any advice on where to start first would be much appreciated. Thanks Chris
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| Halfnelson |
Aug 11 2021, 08:45 AM
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#2
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Member Group: Members Posts: 72 Joined: 31-July 17 From: Cornwall Member No.: 21,303 Region Association: England |
Thanks for everyone's feedback on this. I've finally got an update on things. After a couple of false dawns I'm hoping we've nailed the issue. Total work included:
Checking MPS - OK New fuel lines, filter and fuel pump Sorting the ignition as the spark was weak - so new coil etc Going through all wiring and fuses New CHT sender New plugs for injectors My guess is multiple small faults adding up to a lot of head scratching when we thought the problem was solved... only for it not to be. Done a few local trips including a car show at the weekend. Fingers crossed now for a longer test drive. |
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| Halfnelson |
Aug 20 2021, 07:53 AM
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#3
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Member Group: Members Posts: 72 Joined: 31-July 17 From: Cornwall Member No.: 21,303 Region Association: England |
OK - so not sorted after all. (IMG:style_emoticons/default/headbang.gif)
After about half a dozen test drives with stops, restarts, refuelling etc went down the road to today, car stalled at junction and refused to restart. Strong petrol smell. Disconnected injectors and it would at least try and start but still lots of fuel still coming out of the exhaust so recovered home. What's adding all the excess fuel with the injectors disconnected? Could the cold start injector be faulty? |
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| Bartlett 914 |
Aug 20 2021, 07:58 AM
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#4
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Advanced Member Group: Members Posts: 2,218 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
QUOTE(Halfnelson @ Aug 20 2021, 08:53 AM)  OK - so not sorted after all. (IMG:style_emoticons/default/headbang.gif) After about half a dozen test drives with stops, restarts, refuelling etc went down the road to today, car stalled at junction and refused to restart. Strong petrol smell. Disconnected injectors and it would at least try and start but still lots of fuel still coming out of the exhaust so recovered home. What's adding all the excess fuel with the injectors disconnected? Could the cold start injector be faulty? I would suspect an intermittent CHT or simply a poor connection with it |
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Posts in this topic
Halfnelson Help - Djet running way too rich Jul 23 2021, 06:51 AM
rfinegan Try adjusting the Idle mixture knob on the ECU. I ... Jul 23 2021, 07:35 AM jrmdir Welcome to the D-Jet rich mixture madness. I'm... Jul 23 2021, 08:19 AM dr914@autoatlanta.com SUPER rich could be blocked fuel return, bad valve... Jul 23 2021, 08:46 AM
ctc911ctc That is a beautiful car!
SUPER rich could ... Jul 23 2021, 09:43 AM Olympic 914 Pull a vacuum on your MPS
Make sure your diaphragm... Jul 23 2021, 11:11 AM rjames
Pull a vacuum on your MPS
Make sure your diaphrag... Jul 23 2021, 12:02 PM Dave_Darling Step 1: Check the ignition system. Yes, seriousl... Jul 24 2021, 01:05 AM Halfnelson Many thanks for all the suggestions - plenty to wo... Jul 24 2021, 07:44 AM jrmdir Hi Halfnelson: Hope this doesn't amount to hij... Jul 24 2021, 10:05 AM rjames Calibrating the MPS correctly requires being able ... Jul 24 2021, 10:19 AM brant
Calibrating the MPS correctly requires being able... Jul 24 2021, 01:09 PM mgphoto
Calibrating the MPS correctly requires being able... Sep 6 2022, 01:00 PM jrmdir Thanks for the feedback. Just to be clear, I'm... Jul 24 2021, 02:14 PM Dave_Darling Also worth checking the fuel pressure. Should be ... Jul 24 2021, 07:20 PM r_towle Clean the inner parts in the distributor.
The adva... Jul 24 2021, 09:39 PM Rand I would have bet MPS. How was it tested?
A simple... Aug 11 2021, 06:30 PM Halfnelson Thanks Mark - have replaced the CHT but will test ... Aug 20 2021, 09:34 AM rjames I had a similar situation and it turned out to be ... Aug 20 2021, 09:35 AM Halfnelson
I had a similar situation and it turned out to be... Aug 20 2021, 09:54 AM rjames
I had a similar situation and it turned out to b... Aug 20 2021, 10:15 AM Rand What was the difference in idle when you pulled th... Aug 20 2021, 12:58 PM rjames
What was the difference in idle when you pulled t... Aug 20 2021, 02:23 PM Rand
What was the difference in idle when you pulled ... Aug 24 2021, 09:10 PM rjames
[quote name='rjames' post='2939526' date='Aug 20 ... Aug 24 2021, 09:48 PM Rand
Yup- I had it backwards. After all the DJet and M... Aug 24 2021, 09:52 PM emerygt350 Just out of curiosity, have you checked which inje... Aug 20 2021, 04:44 PM Halfnelson
Just out of curiosity, have you checked which inj... Aug 23 2021, 07:57 AM Halfnelson Lots of questions spring to mind like how it was e... Aug 23 2021, 08:02 AM emerygt350 I have 1... And it is yellow.
I bought those n... Aug 23 2021, 06:19 PM emerygt350
The left side is the 2.0 Aug 23 2021, 06:27 PM steuspeed Wrong injectors.. amazing! I bought a set of S... Aug 23 2021, 10:34 PM ChrisFoley Those look like 1.8L injectors, for L-Jet. Someone... Aug 24 2021, 09:52 AM Halfnelson
Those look like 1.8L injectors, for L-Jet. Someon... Aug 25 2021, 09:37 AM emerygt350 Wow, the plot thickens. Aug 24 2021, 11:23 AM emerygt350 The one you are looking for is the fj114. 59 doll... Aug 25 2021, 10:09 AM Halfnelson I'm resurrecting this thread if that's ok ... Sep 6 2022, 10:10 AM JeffBowlsby Have you checked your CSV for leakage? Sep 6 2022, 10:30 AM JamesM
Have you checked your CSV for leakage?
:agree:... Sep 6 2022, 11:52 AM Halfnelson
Have you checked your CSV for leakage?
:agree... Sep 6 2022, 12:57 PM rjames I spent well over a year troubleshooting a similar... Sep 6 2022, 11:19 AM emerygt350 Yeah, check that cold start valve.
Any chance you... Sep 6 2022, 01:01 PM Halfnelson
Yeah, check that cold start valve.
Any chance yo... Sep 6 2022, 01:07 PM Lockwodo
Yeah, check that cold start valve.
Any chance y... Sep 7 2022, 04:38 PM emerygt350
[quote name='Halfnelson' post='3027513' date='Sep... Sep 7 2022, 05:30 PM mgphoto Pull one side of the fuel rail off while the engin... Sep 6 2022, 01:10 PM emerygt350
Pull one side of the fuel rail off while the engi... Sep 6 2022, 01:38 PM JeffBowlsby Two other things to check:
TS2 - cyl head temp se... Sep 6 2022, 01:53 PM rjames
@emerygt350 Not true. What he is experiencing ... Sep 6 2022, 02:24 PM emerygt350
[b]@[url=http://www.914world.com/bbs2/index.ph... Sep 6 2022, 02:40 PM rjames
[b]@[url=http://www.914world.com/bbs2/index.p... Sep 6 2022, 03:00 PM emerygt350 I guess there is no reason it couldn't go outs... Sep 6 2022, 07:00 PM 914_teener Time Out.
There is a difference between testing a... Sep 7 2022, 07:43 PM Halfnelson Finally got a chance to get to the 914 so can conf... Sep 18 2022, 11:42 AM emerygt350 Possibly but they look ok. Sep 18 2022, 05:09 PM |
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