 Progressive Carburator Won't Idle |
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| ghia1974 |
 Jul 12 2018, 06:12 PM
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#1
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Newbie  Group: Members Posts: 14 Joined: 6-August 15 From: New Jersey Member No.: 19,033 Region Association: MidAtlantic Region  |
I just purchased a 71 914 which has been converted from fuel injection to a what I think is an EMPI EPC 32/36 Progressive Carburetor or some other similar carb. The car was running fantastic with no issues at all. Had it out for a drive today, when all of a sudden it started sputtering and wanting to stall. I limped into a parking lot and let it cool down for about 1/2 and hour. I tried to start it, but I had to keep feathering the accelerator to keep it running, at times the revs would shoot up to 4000 rpm without me further depressing the accelerator. I towed the car home and decided I would try and reset the carburator using the carb initial setup recommendations which required me to turn the idle adjustment screw until it contacted the accelerator cam and turned screw about 2 turns. I then bottomed out the air/fuel mix screw and backed it out about 1 1/2 turns. Still the car will not idle. Any thoughts or suggestions? Didn't note any vacuum leaks.
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| nditiz1 |
Jul 12 2018, 06:24 PM
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#2
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Senior Member Group: Members Posts: 1,177 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region 
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Sounds like dirt in the jets
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| Mark Henry |
Jul 12 2018, 07:57 PM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
You have to check the float.
Take it off, toss it into a pond, lake, river, etc... and if it floats it's good. |
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| HansJan |
Jul 12 2018, 08:02 PM
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#4
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Member Group: Members Posts: 394 Joined: 5-April 16 From: Sugar Land TX Member No.: 19,860 Region Association: Southwest Region
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QUOTE(nditiz1 @ Jul 12 2018, 07:24 PM)  Sounds like dirt in the jets (IMG:style_emoticons/default/agree.gif) |
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| Mike Bellis |
Jul 12 2018, 08:11 PM
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#5
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Easy fix!
Step 1: Take the carburetor off. Step 2: Throw it in the ocean. Step 3: Buy dual carbs. Done! |
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| Front yard mechanic |
Jul 12 2018, 09:56 PM
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#6
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Senior Member Group: Members Posts: 1,154 Joined: 23-July 15 From: New Mexico Member No.: 18,984 Region Association: None
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Easy fix just take it apart and pretend it's Briggs and Stratton lawn mower carb poke a wire brush brissel through the jet and wala
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| ClayPerrine |
Jul 13 2018, 04:58 AM
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#7
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Life's been good to me so far..... Group: Admin Posts: 15,410 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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In all seriousness...
Single center mounted carbs don't work well on a 914 engine. The runners are too long and the fuel drops out of atomization on the way to the valves. The best system for a stock motor is the fuel injection that came with it. It will idle better, run smoother and get better fuel mileage. If you want carbs, go with the duel weber downdrafts and a quality linkage. Fuel mileage will suffer, but it will run far better than the single carb. If you decide to go back to the FI, lots of people here will help you find the parts and get it running. Personally, that is what I would recommend. |
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| forrestkhaag |
Jul 13 2018, 09:32 AM
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#8
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Senior Member Group: Members Posts: 935 Joined: 21-April 14 From: Scottsdale, Arizona Member No.: 17,273 Region Association: Southwest Region |
Cant agree more / with Clay....... If you can, convert to dual carbs and a good linkage setup - all available on this site or by reference from this site. I ran Dual Empi / 40's on my 2.3 four and to this day, (i am told by Drem914) they run great.
People wail on the Empi version of the Weber carbs but for the money, they worked for me for thousands of miles from sea level to mountaintops at 7500 ft. The CarbGuru that set up my 6's Webers has a big pile of 4 - Webers and intake manifolds to match the various sizes So,if you want his contact info. pm me / I make nothing off of his operation but have used his knowledge base as a resource in sorting out my 3.0 6 using Webers on vintage PMO intakes. Finding a complete set of period correct FI (and knowing the reason it is available) is another option but not as much fun.......... (IMG:style_emoticons/default/beerchug.gif) |
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| Mark Henry |
Jul 13 2018, 10:24 AM
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#9
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Poor rookie...1st post and he gets da business. (IMG:style_emoticons/default/unsure.gif)
It's OK buddy we treat everyone the same when they ask about progressives. (IMG:style_emoticons/default/chair.gif) Get rid of the crap carb and all will be good and we'll even give you a hug (IMG:style_emoticons/default/grouphug.gif) (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/welcome.png) |
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| ClayPerrine |
Jul 13 2018, 09:11 PM
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#10
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Life's been good to me so far..... Group: Admin Posts: 15,410 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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Also check to see what distributor is installed in the engine. If it is a Bosch 009, take it out. The 009 distributor was built for the Type IV engine, but only used on the industrial engine which ran at a steady 3K rpm all the time. The bug guys found it worked great for the Type I motor, so they started using it. But for a 914-4, the advance curve is completely wrong. That will affect the performance severely.
I suggest either a Bosch 050 (rare these days) or the stock distributor for a 74/75 1.8L if you are going to run carbs. Both have an excellent advance curve for a 914-4. |
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| jeffdon |
Jul 13 2018, 10:39 PM
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#11
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Senior Member Group: Members Posts: 1,094 Joined: 24-October 06 From: oakland, ca Member No.: 7,087 Region Association: None |
QUOTE(ClayPerrine @ Jul 13 2018, 08:11 PM) Also check to see what distributor is installed in the engine. If it is a Bosch 009, take it out. The 009 distributor was built for the Type IV engine, but only used on the industrial engine which ran at a steady 3K rpm all the time. The bug guys found it worked great for the Type I motor, so they started using it. But for a 914-4, the advance curve is completely wrong. That will affect the performance severely. I suggest either a Bosch 050 (rare these days) or the stock distributor for a 74/75 1.8L if you are going to run carbs. Both have an excellent advance curve for a 914-4. Mallory is good too. |
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| Al Meredith |
Jul 16 2018, 12:47 PM
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#12
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Senior Member Group: Members Posts: 958 Joined: 4-November 04 From: Atlanta, ga Member No.: 3,061 |
Even on hot days these 32/36 s tend to "ice up" on humid days . then they have to run rich to compensate. Also the alcohol fuel eats out the rubber hoses, take out the idle jet and blow it out.
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