Register Login
Shop4Parts - UK's largest online superstore for FIAT and Alfa Romeo parts
Reply
 
Thread Tools
Old 06-07-2011   #1
Join Date: Jul 2008
Location: London
Posts: 205
Thanks: 6
Trader Rating: 0
United Kingdom 
Arrow testing fuel pump/pipes

is there an easy way to test the fuel pump and pipes?

still trying to work out why my 1l injection engine is running rich when idling..with high co

being picky really, but just have a gut feeling...
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

peterainbow is offline Reply With Quote Quote 
Old 07-07-2011   #2
Speed Reader of the Year!
 
Most Easterly Pandas's Avatar
Join Date: Aug 2007
Posts: 39,314
Thanks: 1231
Trader Rating: 2
Most Easterly Pandas has donated!
United Kingdom 
Re: testing fuel pump/pipes

Have you done an ECU reset or checked the lambda sensor?
__________________
Most Easterly Panda's - Panda'ing in East Anglia
Stockest of mk2 Panda Parts, PM for any parts requests
1993 Classic Panda Selecta, 1989 Panda 750L,
2015 Kia Soul EV, 2009 Panda Eleganza & 2005 Panda Climbing 4x4 (LPG)
Most Easterly Pandas is offline Reply With Quote Quote 
Old 07-07-2011   #3
Join Date: Jul 2008
Location: London
Posts: 205
Thanks: 6
Trader Rating: 0
United Kingdom 
Re: testing fuel pump/pipes

yes done the reset and had to replace the lambda sensor a while back

although i must admit was with a generic one of ebay
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

peterainbow is offline Reply With Quote Quote 
Old 07-07-2011   #4
Join Date: Sep 2005
Location: N Derbys
Posts: 1,129
Thanks: 61
Trader Rating: 0
lightweightmick has donated!
United Kingdom 
Re: testing fuel pump/pipes

changing the manifold coolant temp sensor sorted my CLX - cost about a tenner as I remember (if reading low will deliver more fuel via ECU - ie. the sensor thinks the engine is cooler than it actually is and calls for a richer mixture)
I think there's a thread on this some years back where we compared readings of resistance of the unit at different engine temps...(?)
It's most unlikely it's the pump that's delivering too much fuel IMO...
__________________
Ellen - '87 Ducato 2.5D Elddis Autoking 630CK
Viv - '02 Seicento 1.1 SX
Billy - '02 Seicento 1.1 SX
lightweightmick is offline Reply With Quote Quote 
Old 07-07-2011   #5
Join Date: Feb 2008
Location: Edinburgh
Posts: 777
Thanks: 72
Trader Rating: 1
United Kingdom 
Re: testing fuel pump/pipes

If the fuel pump is delivering too much fuel, the pressure regulator will let more fuel back to tank. The pressure regulator would need to be at fault for there to be too much pressure in the lines.
__________________
Panda 4x4
Panda 4x4 project
VW Type 3 Fastback
Chrysler Voyager
nitro_warrior is offline Reply With Quote Quote 
Old 07-07-2011   #6
Join Date: Jul 2008
Location: London
Posts: 205
Thanks: 6
Trader Rating: 0
United Kingdom 
Re: testing fuel pump/pipes

i've checked the resistance on the temp sensor seemed ok

i was thinking more that not enough fuel being delivered and thus when going up hill causing a starvation and stall and this behaviour fooling the ecu into causing more in general to be pumped

but only a grasping at straws as can't work out what else could be, bad at normal/low idle ( high co , smelly , can stall uphill when cold ), but ok when warmed up and at fast idle ( mot passed at fast idle )

am wondering whether to build the ecu monitor to usb thingy mentioned elsewhere so i can get readings from the ecu...
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

peterainbow is offline Reply With Quote Quote 
Old 07-07-2011   #7
Join Date: Sep 2005
Location: N Derbys
Posts: 1,129
Thanks: 61
Trader Rating: 0
lightweightmick has donated!
United Kingdom 
Re: testing fuel pump/pipes

How do you know the readings are true - what have you got to compare against?
__________________
Ellen - '87 Ducato 2.5D Elddis Autoking 630CK
Viv - '02 Seicento 1.1 SX
Billy - '02 Seicento 1.1 SX
lightweightmick is offline Reply With Quote Quote 
Old 07-07-2011   #8
Join Date: Jul 2011
Posts: 2
Thanks: 0
Trader Rating: 0
United Kingdom 
Re: testing fuel pump/pipes

Quote Originally Posted by peterainbow View Post
is there an easy way to test the fuel pump and pipes?

still trying to work out why my 1l injection engine is running rich when idling..with high co

being picky really, but just have a gut feeling...
to test a fuel pump and lines you would need a fuel line pressure gauage, to check why its running rich at idle you will need an oscilliscope to check the lambda and injector pulse timing and or ignition burn time.

failing these garage items I would suggest an obd scanner - you can buy a generic one for around 40 - code read and post up what you have, I would not worry about the fuel pump as previous post, too much fuel - returned to tank, to little fuel and cutting out.

lambda's are sensitive - ebay jobs are suspect and aftermarket ones may give fail readings to the ecu or not work altogether.

I know costs are always an issue but its like looking after yourself, put effort into it and look good, go 3 days without sleep and your knackered.

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

keithmw is offline Reply With Quote Quote 
Old 07-07-2011   #9
Join Date: Jul 2008
Location: London
Posts: 205
Thanks: 6
Trader Rating: 0
United Kingdom 
Re: testing fuel pump/pipes

regarding temp sensor...i compared the resistance readings aginst those that were in another thread, but in any case there was a good shift in resistance from when cold to when hot
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

peterainbow is offline Reply With Quote Quote 
Old 07-07-2011   #10
Join Date: Jul 2008
Location: London
Posts: 205
Thanks: 6
Trader Rating: 0
United Kingdom 
Re: testing fuel pump/pipes

Quote Originally Posted by keithmw View Post
lambda's are sensitive - ebay jobs are suspect and aftermarket ones may give fail readings to the ecu or not work altogether.

I know costs are always an issue but its like looking after yourself, put effort into it and look good, go 3 days without sleep and your knackered.
yes been thinking about this myself...

anyone recommend a good value for money sensor then?

oh and sleep what is that?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

peterainbow 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) In need of Power stearing pump pipes georgemill0 Ulysse 1 07-11-2010 22:01
Fuel Pressure Testing bikecrazy Tech Talk 0 13-08-2010 11:24
Fuel Pressure Testing bikecrazy Newbie Central 0 12-08-2010 22:01
(T) Testing a fuel pump jiminwatford Cinquecento / Seicento 6 09-03-2009 23:30