 1.7 d-jet '73 almost running |
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| isdyl |
 Feb 29 2020, 06:15 AM
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#1
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Member  Group: Members Posts: 113 Joined: 13-June 18 From: Woking, UK Member No.: 22,217 Region Association: England  |
Hi all - so I've refitted d-jet on my 1.7 which had a single weber when I bought it. It's almost running but I've run out of ideas as to what to adjust or check. I've recorded a video of it starting. You'll hear that it starts quite lumpily and wants to stall. I manage to get the revs up by feathering the throttle and they go up to 2.5 or 3000 revs on their own for a second, and then it all dies again. I can keep it running by feathering the throttle again.
https://www.youtube.com/watch?v=Y06kdQC2IZg Fuel pressure when running is 2 BAR. Theres no cold start valve connected. All injectors are 'squirting' as I took them out and checked in a jam jar. I've tried adjusting timing, mixture screw, air screw. I haven't checked the valve clearances yet but have had the distributor in 100 different settings with no improvement. I just wondered if anyone has any ideas please? Thanks, Dylan |
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| euro911 |
Apr 20 2020, 12:22 PM
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#2
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,860 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California 
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I didn't read through all the replies so I'll ask: Did you ever spray a 'combustible' liquid or vapor around the motor while it was idling to locate any vacuum leaks? It's the easiest method to find them (IMG:style_emoticons/default/idea.gif)
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| isdyl |
Apr 20 2020, 02:11 PM
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#3
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Member Group: Members Posts: 113 Joined: 13-June 18 From: Woking, UK Member No.: 22,217 Region Association: England |
Hi, I haven't actually, but that's mainly because it won't stay running. I've definitely got an improvement today after curing some leaks, and now she starts up fine, and idles for about 5 seconds at about 1400rpm, and then starts to die. I can keep the engine running by pumping the throttle, but after a few more seconds she starts to die again. It really feels like the fuel is running out. Pressure gauge stays at 29 psi.
Dylan QUOTE(euro911 @ Apr 20 2020, 12:22 PM)  I didn't read through all the replies so I'll ask: Did you ever spray a 'combustible' liquid or vapor around the motor while it was idling to locate any vacuum leaks? It's the easiest method to find them (IMG:style_emoticons/default/idea.gif) |
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Posts in this topic
isdyl 1.7 d-jet '73 almost running Feb 29 2020, 06:15 AM
BeatNavy You haven't run out of ideas - you haven't... Feb 29 2020, 06:29 AM
isdyl Ok thanks - I was hoping to avoid climbing under t... Feb 29 2020, 06:41 AM BeatNavy
Ok thanks - I was hoping to avoid climbing under ... Feb 29 2020, 06:52 AM BeatNavy I will add that if you've had the distributor ... Feb 29 2020, 06:45 AM isdyl Yes I'm not sure where it is set now! I in... Feb 29 2020, 06:54 AM BeatNavy Don't forget that dwell though (assuming you h... Feb 29 2020, 06:57 AM TheCabinetmaker Have you checked vacuum on the mps? How about the ... Feb 29 2020, 06:02 PM Bleyseng
Have you checked vacuum on the mps? How about the... Feb 29 2020, 07:48 PM Spoke It would help to have an AFR sensor to tune your F... Mar 1 2020, 12:08 AM isdyl Hi - Thanks for your replies. I have checked the h... Mar 1 2020, 02:07 AM isdyl Follow up - TPS is all working correctly.
Hi - T... Mar 1 2020, 06:56 AM euro911 :agree: on the valve adjustment taking priority. M... Mar 1 2020, 02:45 AM isdyl Thanks - I'd better get under that car....
... Mar 1 2020, 03:09 AM BeatNavy These are legit suggestions, but IMO you do have t... Mar 1 2020, 06:59 AM isdyl Great - thanks. I'll get on to it. D
These ... Mar 1 2020, 10:33 AM Tdskip Just a thought - you have flow when testing the in... Mar 1 2020, 04:40 PM isdyl Hi - there is a cold start injector but it’s not... Mar 2 2020, 12:47 AM ndfrigi
Hi - there is a cold start injector but it’s no... Mar 2 2020, 01:03 AM isdyl Yes that’s about 2 bar - should it hold at that ... Mar 2 2020, 01:13 AM BeatNavy I've heard conflicting things on whether it sh... Mar 2 2020, 06:02 AM isdyl Thanks very much, and yes I'm on the case re t... Mar 2 2020, 07:29 AM isdyl Hi all,
So I've checked the valve gaps and all... Mar 14 2020, 10:59 AM 914_teener
Hi all,
So I've checked the valve gaps and al... Mar 14 2020, 12:22 PM porschetub [quote name='isdyl' date='Mar 15 2020,... Mar 14 2020, 02:58 PM Bleyseng We check a MPS by putting 15 hg of vacuum on them ... Mar 14 2020, 12:54 PM isdyl Thank you. I'll do as you suggest. Dylan Mar 14 2020, 01:56 PM TheCabinetmaker Just because the mps holds vacuum does not mean it... Mar 14 2020, 02:48 PM isdyl Thank you for your suggestions. From the video I p... Mar 15 2020, 04:11 AM BeatNavy Go ahead and take out and clean the dizzy as Porsc... Mar 15 2020, 05:57 AM isdyl Will do, and thanks again for your help.
Dylan
G... Mar 15 2020, 11:43 AM ClayPerrine Dylan,
That stuff sat in my garage for years bef... Mar 16 2020, 11:44 AM isdyl Thanks Clay - I’ll do all those things. There wa... Mar 16 2020, 12:10 PM PCH We've recently problem solved the following: G... Mar 16 2020, 12:18 PM isdyl Thanks. Actually there is a spare set of trigger p... Mar 16 2020, 02:52 PM isdyl Hi,
I've spent a long time trying to improve t... Apr 15 2020, 10:07 AM BeatNavy There are some vagaries about which sensor you sho... Apr 15 2020, 10:32 AM isdyl Hi - yes I'm sure I have the timing & dwel... Apr 15 2020, 10:44 AM isdyl Oh I forgot to say that it will only 'tick ove... Apr 15 2020, 10:48 AM isdyl I swapped the sensor out for a 2k resistor just to... Apr 15 2020, 01:25 PM BeatNavy So you just put a 2k resistor between wiring harne... Apr 15 2020, 01:48 PM isdyl Yes, just the resistor between the harness wire an... Apr 15 2020, 02:11 PM Bmw635 Check your fuel filter as it may be clogged. I flu... Apr 15 2020, 02:25 PM isdyl Thanks - I've had that on a few previous cars ... Apr 15 2020, 02:30 PM ctc911ctc Hi,
I went down all of the paths that you did wit... Apr 15 2020, 03:42 PM isdyl Thanks - ok so I've done a bit of testing this... Apr 16 2020, 03:22 AM isdyl Hi - sorry to keep asking questions - I'm stil... Apr 20 2020, 03:36 AM ctc911ctc Getting all of those leaks will result in a fine r... Apr 20 2020, 08:14 AM Bleyseng yes, the spacers come with a paper gasket glued to... Apr 20 2020, 07:55 AM ctc911ctc Does it die as if you turned the key off? Or does ... Apr 20 2020, 03:06 PM isdyl Not quite as quickly as if the key is switched off... Apr 21 2020, 04:39 AM isdyl Hi - here's a video of it just running out of ... Apr 21 2020, 10:51 AM isdyl Plugs are very sooty so maybe too much fuel? Quest... Apr 24 2020, 11:42 AM BeatNavy You would see abnormally high fuel pressure. Apr 24 2020, 11:49 AM isdyl Thanks
I would love to solve this issue myself bu... Apr 25 2020, 10:58 AM isdyl It's working! It's working!! I... May 5 2020, 09:26 AM BeatNavy Was it a blown diaphragm on the MPS? I can't ... May 5 2020, 12:20 PM isdyl I'm not sure - it seems to not leak when you s... May 5 2020, 02:27 PM |
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