Porsche 928 Episode 65 - Testing a Bosch K-Jetronic fueling system
ฝัง
- เผยแพร่เมื่อ 22 ก.ค. 2024
- Following on from last week's epic session, I'm now going to try to test the complete fueling system.... and a few other things along the way :)
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Chapters
00:00 - Intro
01:32 - Testing the CIS distributor
08:59 - Fitting engine dampers
09:38 - Fitting intake runners
13:36 - Outro
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Welcome back guys to my Porsche 928 restoration! I bought the cheapest 928 in the UK and its going to be a battle to bring her back to life...
... and to make matter worse, Im not a mechanic! Im just a regular guy 'having a go', and it doesn't always work out!
Please remember to like the videos and subscribe to follow my story! And, Costs are shown at the end of each video...
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Cohpro for Porsche pipe fittings www.cohpro.com
Also watch GoForIt 928 restoration channel : bit.ly/3mSJ4Ky - ยานยนต์และพาหนะ
I acted surpised at the fuel system working after the spoiler many episodes ago, looked rather spectacular with the clear hose showing all 8 lines running at once
Congrats on these major milestones
I was quite proud of myself for that one :)
brilliant demonstration of the fuelling system, really brought the whole thing to life... top work
Thanks Matt, I was quite pleased with the test :)
looking great Todd, you're pretty much there now
I wish that were true :) fuelling is complete though… next oil I think
I took delivery of my 928 about two months ago. I had no idea where to begin especially with the CIS injection. I’ve been watching these videos over the past few weeks and they have taken all the mystery away from what seemed like a daunting task. Thank you Todd for not only your clear and concise instructions but also how you present it all on camera. All the way from Toowoomba QLD Australia a huge thank you 👍👍
Hi Matthew, oh exciting! what year/condition is your car? Im really glad you are enjoying my videos... this is exactly why I made them! Shout if you need me to show/video any particular bit...
@@MrToddgibbs It’s a 1984 S2 Automatic. Not too many here in Australia and very underrated compared to the local market of the same era. I will be doing an overhaul of the CIS injection system plus replacing plugs and leads. Hopefully I’ll manage to remove them all in one piece…I’d like to leave the motor in the car if I can help it lol. If I get stuck on anything you haven’t already covered in your videos I will certainly send out a long distance SOS. Thanks again for all your dedicated hard work Todd. You’re a god send.
Ah nice. You know how these things go… like pulling a thread in a wool jumper … we both know your engine is coming out :)
Enjoying your rebuild,I did a similar job on my 1978 thirty years ago, its great to see someone else doing a similar project.
Hi Jgmc, thanks for your message, and for watching! Do you still have your car?
@@MrToddgibbsHi, thanks for your reply, yes, I kept the car, had it since 1979 it only had one owner before and they didn't do many miles. Its only clocked up 44k. It brings back memories watching your videos there very informative.
@jgmc7695 oh wow that’s amazing. Any photos you can share? You can post to me on Instagram or facebook
Absolutely a delight to see how far you've come Todd. The engine looks totally awesome sitting there all nice and clean compared to what it once looked like.
Huge thumbs up from me with a like.
Lots of love and respect from Taiwan 🇹🇼.
Ah Terry, its been a long journey but Im still going strong :) It occurred to me the other day that this (car) project is no different to my main job (computer games). They are both huge projects that you need to break into smaller tasks and stay focused on each one. Thinking about everything is daunting, but one task at a time is easy :) Hope you are well!
It sure is a great looking engine. Really interesting seeing how it works as it comes back together.
Thanks, it is a very pretty engine. ... my fear is that there is a correct order to assemble all this and Im not following it.... which means I will probably have to remove chunks to fit forgotten bits. ... but lets carry on and find out :)
Nice progress!
Thanks Michael! Im getting there slowly :)
Your dedication is inspiring. Just got my dad's 928. This might just make me not give up too soon on something!
Side note: what cool synth music did you use while attaching the pipes and plenum?
Thank you. Hope you do your 928, lemme know if I can help
I’ll check
I can't find the track name, but the artist is called Patrick Patrikios. It is in the TH-cam audio library, if that helps
The plate should be difficult to push down. You got it!
Phew… I was worried. But…. Really amazed that it all worked (considering I rebuilt it all)
Cool
Thanks :)
“Bonus Task”😂😂😂
Yeah I laughed as well :) I actually do lots of smaller tasks and tend not to show them unless the main footage isn’t long enough (I aim for 15 minutes)
I have a 1979 928 I just started working on and it is dumping fuel over the back of engine (or bell housing). I can't seem to see where it is leaking from. Could it be something under the fuel distributor?
Can you message me on Instagram or Facebook so you can send photos etc
Hi Todd, I have a question: did you also measure the return flow (outlet FD towards tank)? I am struggling with my kjet for more 2 years now, I don’t seem to get 1120 cc/30 secs, instead I have 400 to 500 cc/ 30 secs😢….FD, WUR has been refurbished, new fuel pump, accumulator and filter …all my pressures (control , system and rest pressures) are they should be, yet the return flow is out of spec….. Gerrit
Hi Gerrit- I didn’t measure any flow at all. My WUR is original (not rebuilt). I renewed fuel pump and filter (original accumulator), every pipe replaced. New Mercedes injectors. I rebuilt the fuel distributor. That’s it… and it worked (fingers crossed)
@@MrToddgibbs That’s great news, when I saw the Porsche drive away, the sound was awesome and I think you
did the job well, my friend.
I am asking about the return flow, because I have a peculiar starting issue cold and warm.
Cold start only goes smooth when flooring the pedal.
Warm start only goes well when I restart the engine within the hour.
Strangely enough, once engine in both cases cold and warm has started and I immediately try to do a restart,
there is no problem.
So the problem seems to be in building up the pressure….but it is as if I get too much fuel during the first start, because
flooring at cold start means adding air….and with the warm start after 1 hour, it doesn’t work because it doesn’t need much fuel when warm…. any thoughts on this ? Gerrit
@user-wk9cn1rn6r hmm that is strange. Have you changed the fuel accumulator?
@@MrToddgibbs yes I did. It’s brandnew. It was the first thing I changed when encountering the problem.
Perhaps a silly question, but could the height of the round metering plate cause this because it is linked with the plunger inside the fuel distributor…There is also a small deadzone when pushing on the metering plate before it pushes the plunger up and causing fuel to flow towards the injectors.
So my question : if metering plate inside the venturi is a bit too high, can this cause fuel issues
This video in particular is amazingly helpful to me as I make this progressively worse with my own 1978 928. A question for you Todd. If I made the mistake of turning the 3mm allen screw clockwise, then counterclockwise, and have now totally lost where it should be (Ughhh). And so now it won't start, although it used to run perfect. So first question is by turning it counter-clockwise to lean the mixture, or clockwise to richen it, is there a point where the screw will bottom out and then a "back off" of some amount of turns to get it to an initial setting? Right now it is continuously howling (engine off) with the injectors shooting fuel... It seems no matter which way I turn it, it makes no difference. Can something disconnect from the 3mm allen screw if it's turned too far? Yikes... I'm so ignorant of this K-Jetronic system (although I did find a factory manual PDF on line if you need it)... Thanks! And great job!!
Hi Craig, to be honest I have no idea yet. I would post on Rennlist forum to see what the guys there recommend (they are the experts!). Let me know what they say...
The final results , it looked like spider
It does doesn’t it
@@MrToddgibbs yes 100%