Not running
- kilrwail
- Posts: 1100
- Joined: Wed Mar 04, 2009 6:49 am
- Your car is a: 1978 Fiat 124 Sport Spider
- Location: Perth, Ontario
Re: Not running
It should be the one with the spring. Tighten it all the way down, then back the screw out about 2 turns. It should run and you can fiddle with the screw until it runs smoothly as you increase throttle. Mine is set at 1-3/4 turns out and runs great. Good luck.
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Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
- Nanonevol
- Patron 2018
- Posts: 828
- Joined: Thu Nov 13, 2014 9:17 am
- Your car is a: 1977 Fiat 124 Spider
- Location: Medway, Massachusetts
Re: Not running
Good job! Making progress. Since the car was running, then wasn't, I'd be careful about changing carb settings that may be ok as is. Look for a problem elsewhere, clog in fuel system, etc.
1977 Fiat Spider
1985 Jaguar XJ6
1967 Triumph Bonneville (hard-tail chopper)
1966 BSA Lightning
1985 Jaguar XJ6
1967 Triumph Bonneville (hard-tail chopper)
1966 BSA Lightning
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- Posts: 46
- Joined: Sat Jun 23, 2018 11:11 pm
- Your car is a: 1976 Fiat 124 Spider
- Location: San Diego
Re: Not running
Okay so I checked my idle mixture screw and it was about 6 turns out! so I set it to about 1 3/4 and now giving it some gas, it will stay running for about 30 seconds but I still have to start it with starting fluid then keep it going with the accelerator pedal and sometimes it would idle without me giving it gas but not often. I looked down in the carburetor barrel and noticed that the jets aren't spraying correctly, they are spraying fuel but its in two different streams and sloppy I think they are clogged, do I have to take apart the carb to clean those out? or is there an easier way to get in there
- kilrwail
- Posts: 1100
- Joined: Wed Mar 04, 2009 6:49 am
- Your car is a: 1978 Fiat 124 Sport Spider
- Location: Perth, Ontario
Re: Not running
Chances are that your idle jets are dirty/plugged. I think you can remove them without disassembling the carb, but I'm not near my car to check how it's done. Find a schematic for your model of carb and it should be relatively easy to figure out.
_____________________________________________________________
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
- RRoller123
- Patron 2020
- Posts: 8179
- Joined: Sun Nov 13, 2011 2:04 pm
- Your car is a: 1980 FI SPIDER 2000
- Location: SAGAMORE BEACH, MA USA
Re: Not running
They probably unscrew from the bottom after pulling the bowl? I don't know, I am an FI fellow. Might be pretty hard to get at and see with the carb on the car?
'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
- kilrwail
- Posts: 1100
- Joined: Wed Mar 04, 2009 6:49 am
- Your car is a: 1978 Fiat 124 Sport Spider
- Location: Perth, Ontario
Re: Not running
No Pete - those would be the main jets, which eventually should be cleaned as well. The idle jets are accessible on the outside. On my ADFA one is behind the ICU solenoid (on the left side), and the other is directly opposite it, both near the top of the bowl portion. Be careful not to damage or lose the tiny rubber O rings. If possible use compressed air to clean the jets.
_____________________________________________________________
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
- RRoller123
- Patron 2020
- Posts: 8179
- Joined: Sun Nov 13, 2011 2:04 pm
- Your car is a: 1980 FI SPIDER 2000
- Location: SAGAMORE BEACH, MA USA
Re: Not running
illustrates exactly why I am not a carb guy, lol. 

'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
-
- Posts: 46
- Joined: Sat Jun 23, 2018 11:11 pm
- Your car is a: 1976 Fiat 124 Spider
- Location: San Diego
Re: Not running
Alright so I took apart the whole carb cleaned out all the jets with carb cleaner and compressed air and I found some orange dust sitting at the bottom of my float chamber (probably not good). Anyways I cleaned everything put It all back together aaaand pretty much nothing changed. Still needs starting fluid to start and will die in if I let off the gas or in around 10-20 seconds
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- Patron 2018
- Posts: 1199
- Joined: Tue Jul 15, 2014 4:57 pm
- Your car is a: 1979 2000 Spider
- Location: Ault, Colorado
Re: Not running
Check the previous "Weber 32 ADFA rebuilding question" thread. A lot of info there,...with pics and links.
Todd.
Todd.
1988 Mazda RX-7
1979 Fiat Spider 2000
1978 3/4 ton Chev 4x4 P/U "FRANKENTRUCK"
1976 Camaro
1972 VW Superbeetle
1969 Ford F100
1968 Mustang coupe
1979 Fiat Spider 2000
1978 3/4 ton Chev 4x4 P/U "FRANKENTRUCK"
1976 Camaro
1972 VW Superbeetle
1969 Ford F100
1968 Mustang coupe
- kilrwail
- Posts: 1100
- Joined: Wed Mar 04, 2009 6:49 am
- Your car is a: 1978 Fiat 124 Sport Spider
- Location: Perth, Ontario
Re: Not running
Did you inspect or change the accelerator pump diaphragm?
_____________________________________________________________
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
- kilrwail
- Posts: 1100
- Joined: Wed Mar 04, 2009 6:49 am
- Your car is a: 1978 Fiat 124 Sport Spider
- Location: Perth, Ontario
Re: Not running
So is it running properly yet?
_____________________________________________________________
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
-
- Posts: 46
- Joined: Sat Jun 23, 2018 11:11 pm
- Your car is a: 1976 Fiat 124 Spider
- Location: San Diego
Re: Not running
no.... got pretty busy the past few weeks, but starting to think of alternatives. I did not check the accelerator diaphragm where is that?
- kilrwail
- Posts: 1100
- Joined: Wed Mar 04, 2009 6:49 am
- Your car is a: 1978 Fiat 124 Sport Spider
- Location: Perth, Ontario
Re: Not running
It's under a square cover retained by four screws on the left side just in front of the solenoid/idle jet. There's a lever that depresses the centre of the device from below. The rubber diaphragm can be torn from age and if so must be replaced.
_____________________________________________________________
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
Peter Brownhill
1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor