Register Login
The UK's No.1 Chrysler Owners Forum
Reply
 
Thread Tools
Old 08-07-2018   #1
Join Date: Oct 2012
Posts: 11
Thanks: 0
Trader Rating: 0
South Africa 
Question Punto SX55 5 Door Fuel pump

Hi, Co Fiat Owners

Tearing my hair out again with this Punto. Started with a jerk every now and then like a dirty fuel filter. Changed it but still done it. Eventually, it just cut out and left me in the rain.

The fuel injector light came on but does not go off when pushing the remote button so it won't start.

Normally I put the key in and on the first turn the light shows. When I push the button the light goes off and it starts. Now the light is off on the first turn then it comes on when pushing the remote.

This was telling me the injector not getting fuel I presume.

Next step I removed the fuel pump as I noticed it is not running. After testing it with 12v from the battery it works but no power on the back connection.

I checked and even changed all fuses but not sure what the next step is. Browsed the forum and followed some advice but still no luck. My question what is the next thing to check? Where does it get power from?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

WillieV is offline Reply With Quote Quote 
Old 08-07-2018   #2
Its Adventure Time!
 
blu73's Avatar
Join Date: Nov 2004
Location: Land of Ooo
Posts: 17,140
Thanks: 368
Trader Rating: 2
blu73 has donated!
Skate Boarder Champion
United Kingdom 
Re: Punto SX55 5 Door Fuel pump

its not an injector light, its the engine management light...

best thing to do is read the codes... you need a fiat 3-pin to OBD adpator, a vagcom cable (both available for just couple of quid on ebay) and some software to read them, MultiEcuScan is the go to software, free version is all you need to read and clear codes.

However, if the pump is not priming when you turtn ignition on, there isnt many things that would do that... If i understand you when you turn ignition to accessory position your engine management light doesnt come on at all now? what about the code light, does that come on and go off as it should?

Fuel pump relay could stop it priming also, sometimes called the twin relay.

I'd say inertia switch but that doesnt stop the pump getting 12v, it is on the earth side.
__________________
Finn - Panda 100HP - thread
Oberyn - Suzuki Ignis Sport - thread
Some previous cars: Alfa 159, Bravo HGT, Cinq 16v, Sei Turbo, Punto GT, Panda Mania 1242 mpi
blu73 is offline Reply With Quote Quote 
Old 08-07-2018   #3
Join Date: Oct 2012
Posts: 11
Thanks: 0
Trader Rating: 0
South Africa 
Re: Punto SX55 5 Door Fuel pump

Hi Blu


Talking about this light. Used to be on until key activated then will go off and the vehicle will start. No, it's off and when I activate key it comes on. Engine management light and code lights work as it normally does.

Would like to know where the electrical feed comes from the front so I can test it.
Attached Images
 
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

WillieV is offline Reply With Quote Quote 
Old 09-07-2018   #4
Its Adventure Time!
 
blu73's Avatar
Join Date: Nov 2004
Location: Land of Ooo
Posts: 17,140
Thanks: 368
Trader Rating: 2
blu73 has donated!
Skate Boarder Champion
United Kingdom 
Re: Punto SX55 5 Door Fuel pump

that there is the engine management light, thats what i'm saying. So i dunno what light you think the engine management light is if you say its working normally, cause that is it.

normal operation would be is comes on for a moment when you turn ignition on for a few seconds and then go out again. Apart from that it should never come on. And its got nout to do with injectors.

power to the pump comes from the fuel pump relay, mounted under a plastic cover on the firewall, should be under a little plastic cover but its often missing - its a little white box. The relay is activated directly by the ecu, i dont have pinout to hand so can't tell you what pin of the ecu.
__________________
Finn - Panda 100HP - thread
Oberyn - Suzuki Ignis Sport - thread
Some previous cars: Alfa 159, Bravo HGT, Cinq 16v, Sei Turbo, Punto GT, Panda Mania 1242 mpi
blu73 is offline Reply With Quote Quote 
Old 09-07-2018   #5
Its Adventure Time!
 
blu73's Avatar
Join Date: Nov 2004
Location: Land of Ooo
Posts: 17,140
Thanks: 368
Trader Rating: 2
blu73 has donated!
Skate Boarder Champion
United Kingdom 
Re: Punto SX55 5 Door Fuel pump

fuel pump relay looks like this....

Click image for larger version

Name:	SDC16626.JPG
Views:	5
Size:	463.1 KB
ID:	192138

If its ever been changed (unlikely, these are pretty bombproof too) it might be brown or even green in rare circumstances.
__________________
Finn - Panda 100HP - thread
Oberyn - Suzuki Ignis Sport - thread
Some previous cars: Alfa 159, Bravo HGT, Cinq 16v, Sei Turbo, Punto GT, Panda Mania 1242 mpi
blu73 is offline Reply With Quote Quote 
Old 09-07-2018   #6
Join Date: Oct 2012
Posts: 11
Thanks: 0
Trader Rating: 0
South Africa 
Re: Punto SX55 5 Door Fuel pump

Thanks, Blu

Cleared up a couple questions I had. thanks for the visuals it really helps. Like I said before on this forum not much assistance in South Africa think I am the only one in this country with this model. No, I'll carry on fault finding.

Regards
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

WillieV is offline Reply With Quote Quote 
Old 09-07-2018   #7
Join Date: Oct 2012
Posts: 11
Thanks: 0
Trader Rating: 0
South Africa 
Re: Punto SX55 5 Door Fuel pump

Tested relay working. Also tested and found 12v supply go through to the pump when turning the key. Can the pump be faulty? Put 12v straight from the battery and it worked but according to me very weak.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

WillieV is offline Reply With Quote Quote 
Old 09-07-2018   #8
Its Adventure Time!
 
blu73's Avatar
Join Date: Nov 2004
Location: Land of Ooo
Posts: 17,140
Thanks: 368
Trader Rating: 2
blu73 has donated!
Skate Boarder Champion
United Kingdom 
Re: Punto SX55 5 Door Fuel pump

perhaps fuel filter is clogged and its struggling to pump past it??

They arent a known weak point but they can fail.. but almost no punto has ever had its fuel filter changed.. the mk1 has an inline filter, if you stand on side with fuel filler cap and look under the car you should see it. Just forward a bit from the filler cap iirc.

Is the tank on yours plastic or metal, they come with both. Its possible theres rust inside if its a metal one which could get in the pump and mess it up, they'd normally just stop working completely in that situation though.

I'd try whacking a new filter on, and if it still doesnt seem to work look at the pump itself.
__________________
Finn - Panda 100HP - thread
Oberyn - Suzuki Ignis Sport - thread
Some previous cars: Alfa 159, Bravo HGT, Cinq 16v, Sei Turbo, Punto GT, Panda Mania 1242 mpi
blu73 is offline Reply With Quote Quote 
Old 09-08-2018   #9
Join Date: Sep 2014
Location: Las Negras, Almeria
Posts: 172
Thanks: 2
Trader Rating: 0
Spain 
Re: Punto SX55 5 Door Fuel pump

The cloth strainer in the base of the pump casing gets blocked so badly the pump can't suck. It's happened to my 55S, just blow it through with the air line, gently.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

rolandbrindley is offline Reply With Quote Quote 
Old 10-08-2018   #10
Join Date: Oct 2009
Posts: 340
Thanks: 20
Trader Rating: 0
renaultvation has donated!
United Kingdom 
Re: Punto SX55 5 Door Fuel pump

If the pump is working, could the problem be the crank sensor?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

renaultvation is offline Reply With Quote Quote 
Reply
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump
Similar Threads
Thread Thread Starter Forum Replies Last Post
(T) Punto SX55 1,1 not starting WillieV Punto (Mk1) 20 11-04-2015 09:05
(G) punto 1.2 8V fuel pump betrayed Punto (Mk2/2b) 12 05-02-2008 15:54
(T) Punto fuel pump GerryTipo Punto (Mk2/2b) 0 14-08-2006 21:19
(T) Punto sx55 Battery to amp installing problem buzzysingh Punto (Mk1) 1 01-01-2006 13:29
(T) 94 Punto SX55 petrol gauge not working BR1AN Punto (Mk1) 1 22-02-2004 20:04