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Author XE Overfuelling?
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
User status: Offline
   4th Jan 07 at 19:54   View User's Profile U2U Member Reply With Quote
Hi,
For some reason, my C20XE is overfuelling really bad. After many problems (See this thread here) I took off the fuel rail and installed a FSE boost valve, to see it that would help. It did, i think, as it started, but it is flooding itself with fuel, as it was doing before. How can I turn down the fuel flow, to stop it flooding itself?

Thanks
Dave A
USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
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4th Jan 07 at 19:58   View User's Profile U2U Member Reply With Quote
had the fse set up on a Rolling road yet?
DaNnY_LaD
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Registered: 30th Nov 05
Location: Walkden,Manchester
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4th Jan 07 at 20:03   View User's Profile U2U Member Reply With Quote
Is it a late or early XE?
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
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4th Jan 07 at 20:07   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Dave A
had the fse set up on a Rolling road yet?



Nope, its not set up yet, but it was overfuelling even before I put it on.

quote:
Originally posted by DaNnY_LaD
Is it a late or early XE?


Early, coil pack type.
SportBoy
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Registered: 5th Oct 01
Location: Retford, Nottinghamshire
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4th Jan 07 at 22:09   View User's Profile U2U Member Reply With Quote
could be coolant temp sensor
Ant
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Registered: 12th May 02
Location: Hereford and Worcester
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5th Jan 07 at 10:35   View User's Profile U2U Member Reply With Quote
could be many things the FSE will need set to the correct fuel pressure early xe is 2.5 bar, CTS and AFM the most common causes of fueling issues on a c20xe
Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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5th Jan 07 at 10:47   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Ant
CTS and AFM the most common causes of fueling issues on a c20xe
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
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5th Jan 07 at 11:49   View User's Profile U2U Member Reply With Quote
Have changed the AFM, so its not that. Will try and get another CTS, where can this be found on the engine? Next to the thermostat?

Cheers
SportBoy
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Registered: 5th Oct 01
Location: Retford, Nottinghamshire
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5th Jan 07 at 11:50   View User's Profile U2U Member Reply With Quote
yeah twin wire plug i think
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
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5th Jan 07 at 12:01   View User's Profile U2U Member Reply With Quote
Just discovered how badly its overfuelling... Nearly 5 litres of fuel gone in a few seconds, its like the injectors are jammed open, petrol is gushing into the engine, then locks it up

Could the CTS really cause that much overfuelling? I remember now that we had to put the sensor from an nova SRI on it, would this of affected it?

Edit: Found this, so It looks quite likely

http://www.topbuzz.co.uk/info/cts/cts.htm

[Edited on 05-01-2007 by macboom69]
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
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5th Jan 07 at 12:34   View User's Profile U2U Member Reply With Quote
Right, changed the plug, it now idles, but very high. Also, if it is revved, it boggs down. However, if I cover the AFM with my hand, it revvs fine, and it idles. Faulty AFM?
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
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5th Jan 07 at 18:04   View User's Profile U2U Member Reply With Quote
Now got a new problem. Even with a working AFM & CTS, it will still not run right.

1. Reversed the fuel lines: One way it will Overfuel, and will just lock up with so much petrol. When the lines are the other way round, the car starts fine, but is idling awful. Also, if you try to apply full throtle, it dies. Also, there seems to be no fuel in the fuel rail, wether running or not (I pressed the bike valve thing, no petrol came out)

What can this be? I have had the fuel pump out, its working fine..
Dave A
USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline
5th Jan 07 at 18:57   View User's Profile U2U Member Reply With Quote
get the fse thing off and put a good standard one on.
ChrisBoom
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Registered: 6th Dec 06
Location: Highland
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5th Jan 07 at 19:06   View User's Profile U2U Member Reply With Quote
Yup, took the fse off.

 
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