First drive running rough, 2.0 weber 40's |
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First drive running rough, 2.0 weber 40's |
skota23 |
Feb 20 2023, 09:10 AM
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#1
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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) |
GregAmy |
Feb 20 2023, 09:23 AM
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#2
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Advanced Member Group: Members Posts: 2,311 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
Welcome to carbs. You'll learn a lot.
You really need an AFR system to properly see what the engine is doing and tune accordingly. Could be lean mid-range, could be fat; could be the accel pump during transition. You just won't know w/o AFRs. - GA EDIT: oh, and buy one of these: https://www.cbperformance.com/product-p/6537.htm |
skota23 |
Feb 20 2023, 09:46 AM
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#3
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Newbie Group: Members Posts: 35 Joined: 28-November 22 From: Madison, WI Member No.: 26,993 Region Association: Upper MidWest |
Welcome to carbs. You'll learn a lot. You really need an AFR system to properly see what the engine is doing and tune accordingly. Could be lean mid-range, could be fat; could be the accel pump during transition. You just won't know w/o AFRs. - GA EDIT: oh, and buy one of these: https://www.cbperformance.com/product-p/6537.htm Thank Greg, Ideally I'd like to get it running well without adding much to the system, but I'll look at a AFR system. I have a flow meter already that I've used for tuning Solex's on my 912 so I should be all set there. I've seen folk recomend a book for tuning Webers (cant think of the exact book right now) but I'm not sure how helpful it would be compared to looking things up online and youtube videos. More research needed, and help from you guys! (IMG:style_emoticons/default/beerchug.gif) |
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