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Join Date: Feb 2014
Location: Lomita, CA
Posts: 2,736
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Quote:
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Dave |
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02-28-2023, 07:22 PM
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Join Date: Feb 2003
Location: Black Rock, CT
Posts: 4,373
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VAC is Volts, AC (ALternating current)
VDC, is, ....drumroll, Volts, DC, (Direct Current)
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Jake Gulick, Black Rock, CT. '73 yellow 911E , & 2003 BMW M3 Cab. Ex: 84 Mazda RX-7 SCCA racer. did ok with it, set some records, won some races, but it wore out, LOL[/B] |
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03-01-2023, 12:27 AM
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How do you upload a video?
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03-01-2023, 12:03 PM
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Join Date: Aug 2018
Location: Maryland
Posts: 2,275
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post it on youtube and put the link here or embed it
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83' Coupe - Ex-RaceCar 77' Targa Narrow Body - SC powered Copper Brown Metallic |
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03-01-2023, 12:17 PM
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Here is a video of the no start
https://youtube.com/watch?v=I-vOOwMg5uM&feature=share |
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03-01-2023, 12:20 PM
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Looks like a backfire through the pop off valve on the third attempt. I wonder if the car is starting off the csv whilst cranking, but there's no fuel flow through injectors. Did you adjust the mixture screw at all?
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03-01-2023, 12:57 PM
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Mixture screw on the throttle body? I have it open 3 turns from closed.
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03-01-2023, 01:25 PM
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PCA Member since 1988
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There is no mixture screw on the throttle body. There is an idle air bypass screw that sets the basic warm idea speed.
But let's start by ruling out stupid. You don't have the boot on the top installed! Without that, there is no airflow through the metering unit, the air door does not lift, the safety fuel pump shut off switch stays grounded, and it will shut off the fuel pump immediately after you start it. Put the boot back on, then try it.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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03-01-2023, 01:48 PM
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The culprit is right in front of your nose........
Joe,
You could spend the rest of the year and this motor will NEVER run. The moment I opened your video, I saw the problem. I doubt even John W. or Ian C. or the best Porsche mechanics in this community could make it idle for a second. Go back to the garage and spend a few minutes looking at your motor. Did you take some pictures before you removed the CIS? Don’t worry. Your problem is very simple. You just don’t know it. I will PM it to you. Good luck. Tony |
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03-01-2023, 02:10 PM
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Quote:
hughc |
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03-01-2023, 02:43 PM
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I saw it and my brain went "NO! WRONG!" But it took me longer than I like to realize why since it was so out of normal.
Not to pick on Joe of course, we've all been there.
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1982 911SC |
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03-01-2023, 03:06 PM
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Can someone please tell me what is so obvious? I have only had this car for 2 years after selling my 67 912 and before that a 70 Boss 302. I have looked over the engine several times and took pictures as I removed the parts and tried to label everything. The only thing that I may have done was not put the CSV plug and the AFS in the correct position?
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03-01-2023, 03:52 PM
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Joe, I am following this thread trying to learn as I will be removing my CIS in the future. I am learning and following posts to learn the dos and don't. Did you check your PM for Tony's info?? Is your airbox installed correctly?? I am just taking a guess, it looks strange right behind the fan, looks like it is not secured properly? Again this is just a guess, I would like to know also. I hope you get it sorted out. Good luck.
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"RED BARCHETTA" 1980 Euro Targa 3.0 |
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03-01-2023, 04:14 PM
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No he hasn't pm'd me yet but I'm sure my air box is installed correctly. The only thing I see is that I do not have connected is the oxygen sensor plug, but I've tried it with it plugged in and without and there is no difference.
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03-01-2023, 04:22 PM
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Understood, I was not trying to insult you or question your work, just trying to help, whatever is so obvious, unfortunately it is not obvious to me.
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"RED BARCHETTA" 1980 Euro Targa 3.0 |
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03-01-2023, 04:25 PM
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I missed it when I first looked at the video, but the critical part that's missing is the intake boot (the rubber boot behind the fuel lines in this photo). Without that there's no air flow to lift the sensor plate, and no fuel delivery from the injectors
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03-01-2023, 05:06 PM
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According to Tony and PeteKz the top boot (pope hate) needs to be installed. I'm sure I have tried to start it with everything on but I'll try it again with it installed.
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03-01-2023, 05:06 PM
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Joe,
If you had the CIS boot installed and and still would not run for a second, then your problem is a massive air leak in the system. You had a backfire shown in your video, so there was ignition and fuel. The question is how much air is going into the system making it too LEAN. Do a smoke test again. I know you did it already but did you do it correctly? Take a video how you did the smoke test. Keep us posted. Tony |
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03-01-2023, 05:08 PM
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I haven't done a smoke test yet, just putting one together to try it.
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03-01-2023, 05:32 PM
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That is a lean misfire, and is completely different from a backfire, and result from opposite issues.
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03-01-2023, 06:34 PM
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Euro 911 SC Targa
RED BARCHETTA
Wicked Witch of the East
