Register Login
FIAT Auto Specialist Team
Reply
 
Thread Tools
Old 03-08-2014   #1
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
900cc '94

Just completed the replacement of cylinder head gasket and reset the tappets. Now runs well but has a hesitation when under acceleration. I had to replace part of the small pipe to the carburettor from the air filter box as it was collapsing under suction.

I don't suppose these complete hoses are available.

Any suggestions would be appreciated.

Ivan

PS Any Cinquecento owners in the Edinburgh area?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 03-08-2014   #2
Join Date: Sep 2009
Location: Aberdeenshire
Posts: 263
Thanks: 13
Trader Rating: 0
lkc has donated!
United Kingdom 
Hiya, I've moved this to the technical advice section as it's more of a question and not a guide. Should get more people viewing it here too
__________________
Grande Punto 1.6 Mjet in Exotica Red - the FS workhorse. Occasionally clean but usually full of boxes and other stuff.
lkc is offline Reply With Quote Quote 
Old 03-08-2014   #3
Stick your own title
 
mrcinquecento's Avatar
Join Date: Apr 2008
Location: Dundee
Posts: 1,598
Thanks: 78
Trader Rating: 0
mrcinquecento has donated!
United Kingdom 
If it's just a vacuum hose, then you'll be able to buy generic vacuum hose either online of from a parts supplier and just cut to size. Normally the hose has the size written on it.

A temporary fix is cable ties tight around the hose to stop it compressing.
__________________
www.fiat-scotland.com,the home of all things both scottish and italian. it's a bit like having an irn bru with your pizza, only much tastier

98 Fiat Cinquecento Sporting 16v, 94 Land Rover Discovery 300tdi
mrcinquecento is offline Reply With Quote Quote 
Old 03-08-2014   #4
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
H

Thanks for that.
Does the vacuum hose work in the same way as as an old fashioned advance/retard system on a distributor? Unfortunately the hose is part of a multi connection system which comes from the filter box and also connects to the head.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 03-08-2014   #5
Stick your own title
 
mrcinquecento's Avatar
Join Date: Apr 2008
Location: Dundee
Posts: 1,598
Thanks: 78
Trader Rating: 0
mrcinquecento has donated!
United Kingdom 
Just thinking through here, 899 cinqs don't have carbs, they have injection...single point ecu controlled, so it'll be the throttle body/injector unit you mean?

Been a while since i worked on an spi system, and even then it'd have been a modified 1108cc or 1242 cc one but fundamentally they will be the same, i think from memory there's 3 or 4 vacuum take offs in total, there should be 2 off of the inlet manifold... one going to the brake servo and one going to the map sensor. On the throttle body, there's one to the airbox (i think) and one maybe to the carbon canister, but not sure on that one. Anyway, No, the vacuum doesn't work like an advance/retard, that's just all ecu controlled. However the vacuum issue might be altering the map sensor readings, which in turn will alter the fuelling and probably cause hesitations and the likes if there's leaking or a sudden pressure change under loads. The hoses are all standard sizes available as generics
__________________
www.fiat-scotland.com,the home of all things both scottish and italian. it's a bit like having an irn bru with your pizza, only much tastier

98 Fiat Cinquecento Sporting 16v, 94 Land Rover Discovery 300tdi
mrcinquecento is offline Reply With Quote Quote 
Old 31-08-2014   #6
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
Thanks for that.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 31-08-2014   #7
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
The continuing saga ends.
Since fitting the cylinder head gasket the hesitation has disappeared presumably the ECU has learnt. I have had however a big problem with excessive idling speed 1200/1500. I replaced the Lambda sensor as the warning light was coming on while idling. I also replaced the Air Filter and lucky to get a new rubber breather pipe system from eBay £20.00. Still idling too fast. Lots of thought and research and purchased a idle control step controller no change. Then bought a throttle position potentiometer £8.00...sorted!

All the parts cost less that £20.00 each and the car is now going better that ever and the hydraulic tappets are quiet.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 02-10-2014   #8
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
The story continues. Following all of the above car ran well for perhaps 2 weeks. Then I began to get hesitation on acceleration when load was applied. Under light throttle no problem. I thought it was electrical so changed plugs and leads, no difference. Colleague thought it might be fuel problem so changed fuel filter and checked fuel flow which was good.
Doing my head in. Any suggestions?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 02-10-2014   #9
Join Date: Jul 2008
Posts: 3,273
Thanks: 0
Trader Rating: 0
United Kingdom 
Maf/map sensor?
Stuart is offline Reply With Quote Quote 
Old 02-10-2014   #10
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
Been changed 3 months ago. Original Fiat part. No warning light.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 02-10-2014   #11
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
Could it be the injector?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron is offline Reply With Quote Quote 
Old 02-10-2014   #12
Stick your own title
 
mrcinquecento's Avatar
Join Date: Apr 2008
Location: Dundee
Posts: 1,598
Thanks: 78
Trader Rating: 0
mrcinquecento has donated!
United Kingdom 
Run some injector cleaner through. Could be coils though.

could also be a tear in the map pipe etc or vacuum leakage.
__________________
www.fiat-scotland.com,the home of all things both scottish and italian. it's a bit like having an irn bru with your pizza, only much tastier

98 Fiat Cinquecento Sporting 16v, 94 Land Rover Discovery 300tdi
mrcinquecento is offline Reply With Quote Quote 
Old 02-10-2014   #13
Join Date: Jul 2008
Posts: 3,273
Thanks: 0
Trader Rating: 0
United Kingdom 
Coolant temp sensor
Stuart is offline Reply With Quote Quote 
Old 02-10-2014   #14
Stick your own title
 
mrcinquecento's Avatar
Join Date: Apr 2008
Location: Dundee
Posts: 1,598
Thanks: 78
Trader Rating: 0
mrcinquecento has donated!
United Kingdom 
Quote Originally Posted by Stuart
Coolant temp sensor
Ah yes,

My favourite problem sensor or "the arsehole" as i like to call it

That thing throws up the most random side effects when it starts to die.
__________________
www.fiat-scotland.com,the home of all things both scottish and italian. it's a bit like having an irn bru with your pizza, only much tastier

98 Fiat Cinquecento Sporting 16v, 94 Land Rover Discovery 300tdi
mrcinquecento is offline Reply With Quote Quote 
Old 02-10-2014   #15
Join Date: Nov 2012
Posts: 11
Thanks: 0
Trader Rating: 0
United Kingdom 
Map pipework checked and OK. All induction pipework has been replaced.

Where is the Coolant Sensor?
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

ivanmcameron 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