First drive running rough, 2.0 weber 40's |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
First drive running rough, 2.0 weber 40's |
skota23 |
Feb 20 2023, 09:10 AM
Post
#1
|
Newbie Group: Members Posts: 35 Joined: 28-November 22 From: Madison, WI Member No.: 26,993 Region Association: Upper MidWest |
Hi Folks,
I was able to take my new to me 914 for a short drive yesterday. The car is a 74 with what I think is the original 2.0. It has Dual weber 40's and what I think is the stock distributor. The cap and rotor look practically new and the plug wire in good condition. It wouldn't start a few weeks ago and I pulled the plugs (NGK 7) and cleaned them, fired right up after that (Never had webers before and I think I flooded the cycling a little pumping the gas pedal thinking it would help start. Other observations. The few times I have started it (usually after sitting over a week) I crank the engine, and give a dab of the gas pedal to get it to fire, usually takes several tries to get. running. After warming up a bit engine goes through revs well. On the drive the engine runs very rough usually between 2-3k its barely pulling. Lots of hesitation and at odd times it pops to live a pulls great. My first thought is to pull the carbs, do a thorough cleaning and check to see what jets are fitted and the condition of the floats. Also planned are a timing check, valve adjust, oil and filter, fuel filter. Is there any other details I can provide for suggestions on how to get things running well? (IMG:style_emoticons/default/poke.gif) Thank you! Steve Attached thumbnail(s) |
nditiz1 |
Feb 26 2023, 07:54 PM
Post
#2
|
Senior Member Group: Members Posts: 1,191 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region |
You could upgrade the FP to a CB rotary which will consistently deliver the proper amount of pressure. It will also clean all 3 of those items shown as it also comes with a fuel filter in line.
You should be good to start with the 28s. It will give you the easiest time dialing it in. Once you have a consistent AFR from cruise to WOT then you can adjust you power band by moving up in venturis. Only other suggestion is to upgrade the Dizzy with a pertronix Svda. The advance will definitely help smooth transition from rest. Only thing better than that is a 123ignition. I'm think of building a kit to help others dial in their carbs. I have several jets and vents. Try out the different ones. Find the set that makes it work and send the kit back. |
Lo-Fi Version | Time is now: 10th June 2024 - 06:39 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |