Fuel riddle??? - Alfa Romeo Forum
You are currently unregistered, register for more features.    
Thread Tools Search this Thread
(Post Link) post #1 of 3 Old 12-10-09 Thread Starter
Status: -
AO Member
Join Date: Jul 2009
Location: New Zealand
County: Gisborne
Posts: 10

Member car:

33 16V

Fuel riddle???

Here is how the story goes;
Bought a nice shiny red 33 1.7 16V and while driving it home it progessively developed an aweful hesitation under load and midrange revs 2500 - 3000rpm. I suspected fuel issues, so I replaced the filter and then she went like nothing else....for a week. So I replace the filter again. The result is the same, good for a week of normal driving then back to its usual misfiring ways.
Now suspecting a rusty tank or dirty fuel, I dropped the tank and gave it a good clean out (no rust). In went a new fuel filter for good measure and the result still the same! I can't go on changing filters every week!

Any suggestions as to where now? Failing pump perhaps?
rua-man is offline  
Sponsored Links
Status: Drive it Like you Stole it ;)
Join Date: Dec 2008
Location: Cyprus
County: Nicosia
Posts: 10,277
Images: 27
ok, here is how it goes.

First of all you need to make sure that this is your problem - dirty fuel filter that is.
If there are remains of rust or dirt inside your fuel filter, then that must come from somewhere ! Definately not the pipes and definately not the fuel pump. So you are left with the tank !
Due to the structure of the tank, you can never be 100% sure that its completely clean, as you cant see the complete tank's insides !
If this is the case, you will need to remove the tank and either change it or give it a thourough clean out !
Your injectors could use a clean as well.

If on the other hand you cant find any remains in the filter and you are not so sure that its dirty fuel thats causing the problem, in order to save all this trouble with the tank and injectors, simply attach a fuel pressure gauge directly on your fuel regulator, to see how much pressure you have. Maybe problems are from a weak fuel pump or a faulty regulator. You should have at least 2.5 to 3.5 bar pressure on idle and full throttle respectively.

Best of luck , keep us posted
Supercharged16v is offline  
(Post Link) post #3 of 3 Old 20-11-09 Thread Starter
Status: -
AO Member
Join Date: Jul 2009
Location: New Zealand
County: Gisborne
Posts: 10

Member car:

33 16V

Haha the problem has been solved! Turns out it was nothing really to do with fuel...not exactly anyway.

After many days of frustration and replacing parts, I discovered that when I disconnected the negative earth connection from the battery (then reconnected) the car ran better for a short while. Of course I did this when replacing the fuel filter.

I started a new thread when I discovered this;

rua-man is offline  

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Alfa 33, Sud & Sprint

fuel , riddle

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

For the best viewing experience please update your browser to Google Chrome