My 79 idles rough and has really bad MPG

25

Asked by Mar 30, 2014 at 10:20 AM about the 1979 Fiat 124 Spider

Question type: Maintenance & Repair

I have tuned the car and rebuilt the carb. (with the so called kits available) but still have
a Hard starting, rough running; poor gas mileage Spider. My plan is to replace the carb,
but I was told that this model had fuel system issues and that I should replace the
intake and carb to an older model system from 1975-1978. If so, where can I purchase
the manifold; (carbs are available); and what is the cost. Will also need info. on required
linkage and other possible hick up for the conversion.

3 Answers

20,395

WOW- a Fiat question- make sure it's not the distributor- it sounds like the carb is the problem- the 2 liter spiders with the carb are real problems- the carb is so compromised with emission controls that they are some of the worst Webers ever made- a year later, Fiat just made the leap to fuel injection to get those sexy thangs runnin' right- I don't think you need to replace the manifold- "Vick" sells a Weber 38/38 that should just bolt right on- I have a 1974 Sport Coupe 1800 and the carb has a manual choke! That's the way to go, but mine came with it- there are so many ways to go with these engines, you should get all the info you can, then make a decision- call Vick and get them to send you a catalog- that's a good place to start- and if your spider has no rust, it's worth puttin' money into, because the value is just goin' up on anything "Made in Italy"

25

Thanks I'll try the new carb first. Worst case is that I get a need to get a manifold if it isn't completely fixed.

2,685

What was the solution? I remember when I had a 78 124 Fiat Spider and was running poorly. After changing the points I thought it would solve the problem. But no, I found the bearing on the distributor shaft was worn and caused it to move thus make the points go out of time. Another good used distributor did the trick

Your Answer

Add photo

Related Questions

  • Manual shifting & Injuring a Car's Function 2 answers

    We bought a preowned 2013 Fiat 500 Pop with 22k miles on it. I grew up driving sticks and have always enjoyed and preferred driving manuals... With that said my husband has never driven a manual an...

    2013 Fiat 500 Pop

    -

    Maintenance & Repair

  • What fuel does 2016 FIAT 500x take 3 answers

    Dumb question but what kind of fuel does the 500x take? I've read it needs premium but is that really necessary?

    2016 Fiat 500X Trekking AWD

    -

    General

  • hows the car tech nology wise 3 answers

    i want to know the tech benefits of the Punto

    Fiat Grande Punto

    -

    General

  • rough idle 25 answers

    I have a rough idle, which doesn't seem to affect acceleration (yet), but it is annoying as heck. No codes are thrown.

    1999 Infiniti Q45 4 Dr Touring Sedan

    -

    Maintenance & Repair

  • Rough Idle Issue 29 answers

    I have a 2003 Dodge ram 1500 SLT with the 4.7ltr engine that has 190,000 miles on it. It was idling real rough recently so I cleaned the throttle body out and changed out the idle control sensor. Th...

    2003 Dodge Ram 1500 SLT LB

    -

    Maintenance & Repair

124 Spider

Looking for a Used 124 Spider in your area?

CarGurus has 923 nationwide 124 Spider listings starting at $22,000.

ZIP:

Search Fiat 124 Spider Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Fiat 124 Spider Experts

#1 jamnblues
jamnblues
Reputation 80
#2 COMETGUY61
COMETGUY61
Reputation 40
#2 Rowefast
Rowefast
Reputation 40
View All

Related Models For Sale

Used Ford Mustang
582 Great Deals out of 41,215 listings starting at $1,699
Used Chevrolet Corvette
292 Great Deals out of 20,420 listings starting at $3,688
Used Fiat X1/9
1 listing
Used Chevrolet Camaro
475 Great Deals out of 39,922 listings starting at $3,499
Used Porsche 911
128 Great Deals out of 4,469 listings starting at $8,901
Used BMW 3 Series
1,531 Great Deals out of 39,676 listings starting at $1,495
Used Dodge Charger
469 Great Deals out of 29,730 listings starting at $2,275

Used Cars For Sale

2017 Fiat 124 Spider For Sale
904 listings starting at $22,000