Notices
General Technical
Sponsored by:
Sponsored by: CARiD

What causes fuel cut?

Thread Tools
 
Search this Thread
 
Old Sep 8, 2008 | 08:29 PM
  #1  
Ozzy_555's Avatar
Ozzy_555
Thread Starter
Scooby Regular
 
Joined: Jul 2008
Posts: 258
Likes: 0
From: Workington, Cumbria
Default What causes fuel cut?

Any info?


Cheers.
Reply
Old Sep 8, 2008 | 10:47 PM
  #2  
silent running's Avatar
silent running
Scooby Regular
 
Joined: Aug 2005
Posts: 3,957
Likes: 1
From: East coast.
Default

Overboost. The ECU detects too much boost, knows that if it allows the engine to continue running like this it will go lean and destroy itself, so cuts the fuel.
Reply
Old Sep 8, 2008 | 11:06 PM
  #3  
Ozzy_555's Avatar
Ozzy_555
Thread Starter
Scooby Regular
 
Joined: Jul 2008
Posts: 258
Likes: 0
From: Workington, Cumbria
Default

Whats the best way to sort it out clean or replace boost solenoid?

Only done it once at the weekend but i did replace O2 Sensor not sure that would have anything to do with it tho
Reply
Old Sep 9, 2008 | 09:52 AM
  #4  
silent running's Avatar
silent running
Scooby Regular
 
Joined: Aug 2005
Posts: 3,957
Likes: 1
From: East coast.
Default

Clean it out. Connect your test connectors under the steering column to get it activated and clicking, undo the bolts and gubbins so you can pull the solenoid away from the engine bay a little, stick a rag around it and start blasting with carb cleaner in every hole. Then clean out the associated plumbing as well and check your oil level's not too high. I never run mine more than the half mark.

If you don't already have a boost gauge, you will find this very useful for this kind of problem. Plus it looks cool.
Reply
Old Sep 9, 2008 | 09:59 AM
  #5  
Ozzy_555's Avatar
Ozzy_555
Thread Starter
Scooby Regular
 
Joined: Jul 2008
Posts: 258
Likes: 0
From: Workington, Cumbria
Default

Cheers for that, a boost gauge was the next thing on my list
Reply
Old Sep 9, 2008 | 10:26 AM
  #6  
v8voodoo's Avatar
v8voodoo
Scooby Regular
 
Joined: Nov 2004
Posts: 1,376
Likes: 0
From: The place where indicators don't exist....
Default

Also caused by cornering too fast with not enough fuel in the tank...
Reply
Old Sep 9, 2008 | 10:47 AM
  #7  
Peanuts's Avatar
Peanuts
Scooby Regular
iTrader: (15)
 
Joined: Jul 2001
Posts: 8,606
Likes: 0
From: Portsmouth
Default

thats fuel starvation, very different thing
Reply
Old Sep 9, 2008 | 10:55 AM
  #8  
v8voodoo's Avatar
v8voodoo
Scooby Regular
 
Joined: Nov 2004
Posts: 1,376
Likes: 0
From: The place where indicators don't exist....
Default

Originally Posted by Peanuts
thats fuel starvation, very different thing
D'oh. Thought I saw it called fuel cut on a thread about it moons ago.
Reply
Old Sep 9, 2008 | 11:15 AM
  #9  
Peanuts's Avatar
Peanuts
Scooby Regular
iTrader: (15)
 
Joined: Jul 2001
Posts: 8,606
Likes: 0
From: Portsmouth
Default

no, the effects are the same thing, but trying to cure fuel starvation involves having more than a 1/4 tank of fuel on fast corners, fuel cut suggests over boosting which causes engines to go pop.

Same symptoms, very different causes and solutions.
Reply
Old Sep 10, 2008 | 08:39 AM
  #10  
silent running's Avatar
silent running
Scooby Regular
 
Joined: Aug 2005
Posts: 3,957
Likes: 1
From: East coast.
Default

Fuel cut is exactly like hitting the rev limiter - a 'brick wall' effect.
Reply
Old Sep 10, 2008 | 10:25 AM
  #11  
Ozzy_555's Avatar
Ozzy_555
Thread Starter
Scooby Regular
 
Joined: Jul 2008
Posts: 258
Likes: 0
From: Workington, Cumbria
Default

Yep that's what happened - hasn't done it since tho
Reply
Old Sep 10, 2008 | 12:50 PM
  #12  
Peanuts's Avatar
Peanuts
Scooby Regular
iTrader: (15)
 
Joined: Jul 2001
Posts: 8,606
Likes: 0
From: Portsmouth
Default

if you have a MBC or similar then you may well have to adjust it between hot and cold spells as the density of air changes, what is fine in the sumnmer may well cause FC in the winter.
if you dont need to then you havent pushed the car far enough
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
JimBowen
ICE
5
Jul 2, 2023 01:54 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
Dec 28, 2015 11:07 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
Nov 18, 2015 07:03 AM
Ganz1983
Subaru
5
Oct 2, 2015 09:22 AM
IAN WR1
ScoobyNet General
8
Sep 28, 2015 08:14 PM




All times are GMT +1. The time now is 08:23 PM.