 Porsche 914-4 Weber Carb running rich, Weber Carb running rich on #4 only |
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| mturner7 |
 Nov 12 2023, 07:29 PM
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#1
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Newbie  Group: Members Posts: 14 Joined: 8-May 22 From: Cupertino California Member No.: 26,532 Region Association: Northern California  |
Hi Everyone,
My car is a 1974, 914-4 with a 2.0L (2056cc) engine. With Weber IDF 44's. My #4 cylinder is running really rich. All the others are fine. The Question is: What in the carburetor could most likely cause the plug to foul (Running very rich) like in my case? I've tried to adj the air/fuel mixture screw still no change. This is what I've done so far: 0) Did a compression check on all cylinders. All ok. (95-100psi) 1) Changed the plugs. 2) Changed the Cap and Rotor. 3) Changed the plug wires. 4) Verified all the jets are the same. 5) Set the Air flow on each carb, sync'd them 6) I cleaned all the jets with the carb in the car, ran and idled much better. 7) Verified Spark to that Cyl, got a hell of a shock out of it. 8) I'm running Elec-Ignition, Flamethrower Coil, 60,000volts. After doing all this, the #4 plug still fouls after only about 20 to 30 miles. It has to be the carburetor. I just pulled the carburetor. Thanks for the help.   |
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| technicalninja |
Nov 15 2023, 10:25 AM
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#2
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Advanced Member Group: Members Posts: 2,360 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region 
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https://www.piercemanifolds.com/CHOKE_p/71507.htm
Pierce lists 28 venturis for the 44IDF. This should solve most of the "too big" in this application. |
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Posts in this topic
mturner7 Porsche 914-4 Weber Carb running rich Nov 12 2023, 07:29 PM
Superhawk996 Those carbs have been modified
1st thing I would... Nov 12 2023, 10:34 PM
mturner7
Those carbs have been modified
1st thing I woul... Nov 13 2023, 03:45 PM Tbrown4x4 Also look at how the throttle plate uncovers the p... Nov 13 2023, 09:26 AM Superhawk996
Also look at how the throttle plate uncovers the ... Nov 14 2023, 11:20 AM dr914@autoatlanta.com all good advice, additionally 44s are too large fo... Nov 13 2023, 09:56 AM 930cabman
all good advice, additionally 44s are too large f... Nov 13 2023, 12:49 PM infraredcalvin Not much to add to the above, but have you moved i... Nov 13 2023, 02:59 PM mturner7
Not much to add to the above, but have you moved ... Nov 13 2023, 06:12 PM 930cabman If anything I would go with 28mm venturis, not 36... Nov 13 2023, 07:21 PM SirAndy
If anything I would go with 28mm venturis, not 36... Nov 14 2023, 08:57 PM Dave_Darling Have you checked the valve adjustment? Double-che... Nov 13 2023, 11:23 PM technicalninja
If anything I would go with 28mm venturis, not 36... Nov 14 2023, 12:01 AM rhodyguy The one air bypass screw looks to be way way open. Nov 14 2023, 09:48 AM rfinegan After basics are set up for valve lash, timing, fl... Nov 14 2023, 07:59 PM Spoke Hijack (again):
On my 2056, I have some popping w... Nov 14 2023, 09:59 PM Superhawk996
I'm going to pull the carb and inspect. What... Nov 15 2023, 08:13 AM Spoke
I'm going to pull the carb and inspect. Wha... Nov 15 2023, 08:49 PM technicalninja The 115 mains are the only thing that jumps out at... Nov 14 2023, 11:06 PM Superhawk996 @spoke
Yes that location is where the idle jet ... Nov 15 2023, 11:38 PM Spoke @Superhawk996
Thanks. I tried to take out the id... Nov 27 2023, 08:19 PM 930cabman
[b]@[url=http://www.914world.com/bbs2/index.php?s... Nov 28 2023, 11:19 AM Al Meredith I have to blow out the idle jets all the time . Se... Nov 28 2023, 10:26 AM |
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