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1979 fiat spider 2000 pinan farina weber adha carb has very rough idle despite all my efforts to tune up exactly to specs what are some likley causes

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  • Anonymous Mar 25, 2014

    Adjust air Fiat UNO 1100 Carburettor

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  • Fiat Master
  • 21,949 Answers

Tappets too tight
points too wide
strip and clean carb especialy the air passages
cracked distributor cap
spark plug breaking down
low compression
head gasket blowing between cylinders
no thermostat
air leak on inlet manifold/carb base

Posted on Nov 11, 2008

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1979 fiat 128 4cyl 60hp what is the maximum speed


two countrys specs

north america /usa and european
4 speed gearbox
178 / 111





26272870-pyjtikyzfdc30spylyjcc1vq-3-0.jpg

Sep 02, 2016 | 1979 Fiat 128

1 Answer

I need a diagram of fast idle link assembly on weber 34DGEC carb


Tammy , weber has the pages to fix webers, why not read there.
its all there. for custom carbs,
fixing cars is a labor of love, if not, dont buy custom cars.
and for sure webers.
TAKE Photos of your work, its free now , no Kodachrome.
the car came with Autolite/motorcraft, carter or Rodcheter carb.
not webers.

idle, all carbs you can set the idle to zero. with the fly plate closed
and the engine stalls.
so does your butterfly plate close.

IDLE DOWN, HOT or cold engine,? is the choke OFF?
if the choke is off you can starve it of all air. at the stop screw.
if not, then the throttle cable is tight,
or you have air leaks in the plenum somewhere.
but air leaks cause lean, but with a bad tuned rich weber, it will race with air leaks, bingo???? im a carb o holic. retire.

Jul 26, 2014 | 1983 Jeep CJ7

1 Answer

How do I adjust fast idle link assembly on weber 34DGEC


http://www.jeepforum.com/forum/f8/weber-34-dgec-carb-too-rich-jets-tune-jeep-4-2-258-a-631105/

read
http://www.wranglerforum.com/f218/34-dgec-weber-problems-126887.html
really its a.
Solex 34 TEIE import that gets a Weber name
that is why tuning data, is missing at webers. site.

what makes you think it was ever tune right.
was it?

http://www.jeepsunlimited.com/forums/showthread.php?531786-Weber-34DGEC-CARB-Conversion-Probs

1: is fuel pressure.
2: is float level checks.
3: is jetting,
4: is no intake leaks, or it will never idle right or stalls. or races.
if its rich (wrong jets) it will race with air leaks
if it lean (wrong jets) it will stall with air leaks.

5: the choke is off for all above. tuning the silly chock is last.
on my cars, i run a manual choke, so ends that.

Jul 26, 2014 | 1983 Jeep CJ7

1 Answer

What are the correct jets for a vw 2L 8V engine with weber 40 side drafts hi. i have a vw 2L 8V engine (stock standard) and i have a set of weber 40 side drafts on it. i please need to know what are the...


VW what car?
what year>?
no model, no year,
no joy.
are these custom carbs? if yes, NO ONE CAN answer that.
because.
Jets are tuned for YOUR engine alone.
if all this is true,then get the weber book, huh? and read it.
it tells you how to tune any weber, and its not simple. not at all
the webers are the most difficult to tune but on the other hand they are the best. (less compromise , makes great racing carbs).
there are on line weber tunning pages, why not google that.

in the old days, we'd use spark plug readings for full week end (wasted ) to tune any custom carb,,

fast forward, 21st century, we have nice wide bad 0xy sensor tool.
its about, $150 now.
we put a 02 exhaust bug on the exhaust headers, (both if v8)
and we tune the carb. using this tool , in about 1hour.
way less for only idle , idle is very simple NO ENGINE LOAD.
I set it to stoich and drive.
end story, unless , issues driving or up hills.

on stock carbs the idle has a mixture screw.
we set it to max RPM and the unscrew 1/2 turn (rich)
not all carbs some use an air screw. (backwards)
contrats, the most complex question ever asked on fixya.
ever.
join a car forum for your car, then find custom carb section
then ask there. bingo,, must maybe 1 other person did this.
but i can tell you if the engine is different , with custom exhaust
all the tuning must be done over.
eg: custom cam, milled heads, exhaust, bored cylinders. or ported inakes. all change DEMAND for fuel and must be tuned to match it.
same is true with EFI. (speed density) but not air density EFI.
see.... ?


Jun 17, 2014 | Volkswagen Cars & Trucks

1 Answer

Why car is running rough


It is most likely a carburetor problem. MGs are known for their dual carb set up. Heres a you tube video on how to tune them. https://www.youtube.com/watch?v=4nvGLgO6pj0

Mar 31, 2014 | 1957 MG Midget

1 Answer

1982 toyota pickup 22r rough idle/skipping


You may need a tune up- new plugs, filters, distributor cap and rotor, oil and filter. If your plug wires are brittle, cracked, or real, real old they should be replaced.
But before spending money, you might want a compression test to check the internal mechanical condition. Low compression in a cylinder from a burnt valve, or poorly seating valves, could cause rough idling and missing. That would have to be fixed first. You can buy a compression gauge for about $30 and do it yourself. Look on youtube or google for the correct procedure. It is really easy, and can help you decide if the engine needs repairs first, or if you can proceed with a tune up.
If you still have the rough idle, it could be in the carburetor. If your engine is worthy, consider a weber carburetor- lots of people with those engines use the weber 32-36. Better performance and economy than the stock carburetors, and they are sold with the adapter plate, gaskets, everything you need to install it on your intake. Kind of expensive, though. Last time I checked, they ran about $250. for new.

Jan 18, 2014 | Cars & Trucks

1 Answer

I have a 1979 fiat spider, I am putting 14" rims


Make sure the rims are the correct bot pattern (4 X 98) and hubcentric. As for tire size, goin from a 13 to 14 inch rim is called plus one. The key is tio maintian the same tire diameter so the gear ratio and speedometer arenlt affected.

A stock 13 take a 195SR- 13 tire, wirth the 'SR' being a 75 series tire with a diameter of 24.52 inches. The closest match in 14 inch tires is 215x60-14 with a diamter of 24.16. As close as possible match.

That would as much tire as youi wouls ever need.

Jan 16, 2011 | 2007 Fiat 124

2 Answers

1981 Fiat 124 Spider. No spark coming from coil.


Assuming that you have a fully charged battery then you should check/replace the ignition points and condenser. This should ideally have been checked before investing in a new coil.

If in any doubt then just replace them as it's cheap and easy. Note that most Fiat 124 Spiders are a little more complicated than normal cars as they're often fitted with two sets of points instead of the usual single set. One set is used purely for starting and the engine switches over to the other set once it's running at full oil pressure.

Assuming you have a 1600cc dual point 124 Spider then look at the following web address to see how to replace and adjust your points:-
http://www.mirafiori.com/~thad/points.html

Note that although the points can be set roughly using a feeler gauge it's vital to adjust them correctly using a dwell meter.

The next web address gives you the specs for the US specification Fiat 124 Spider which usually had a single points distributor (points specs on page 21):-
http://homepage.mac.com/tmckaskle/fiat/images/specs/index.html#page1

When doing this job also check and replace both the distributor cap and rotor arm if they show signs of damage, burning or excessive wear.

This is not a difficult job, but it is fiddly. I usually found it easiest to remove the distributor from the engine to work on it but that does mean that you need to mark the position of the rotor arm as the distributor is withdrawn to ensure that you don't completely lose the ignition timing when you've finished. You'll need to recheck and adjust the timing afterwards whether the distributor is removed or not anyway.

Finally, for lots of detailed help and assistance, I strongly suggest that you register on the Fiat Forum at the address below:-

http://www.fiatforum.com/


Sep 17, 2009 | Fiat 124 Cars & Trucks

1 Answer

Rough idle warm up or cold


The carb may be able to be rebuilt but those old *** carbs where not very good to start with. The Weber application is a great one and will last a very long time you can also get a kit for a holley if you want to get more performance. The engine in your truck will last forever as you already know but it will start leaking oil on the front side of the engine. When this happens the tech will try to replace the pan gasket but the problem will be the front main seal. When this happens have the tech change the timing chain at same time and you will save a fortune.

Mar 08, 2009 | 1987 Toyota Pickup

1 Answer

1979 fiat spider 2000 multicolored vaccume ports rough idle


auto choke and heated inlet manifold but these are not colour coded from the factory and they serve a function.rough idleing on this type of classic vehicle is down to one thing unleaded fuel causing the valves to burn out,remove cylinder head and decoke and grind valves in ,then use a lead substitute with the petrol

Nov 13, 2008 | Fiat Pininfarina Cars & Trucks

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