Minty_Fresh
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Registered: 1st May 08
Location: westmidlands
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what could be the reasons for this?
i dont boot it around, a few times but only like most drivers tbh..
but im getting shite mpg..
its a 1.4 16v
power box inlet
cams
4-2-1 manifold + exhaust
could it be the injectors?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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When you say shite, how bad?
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marklawton
Member
Registered: 24th Apr 05
Location: Pensby, Wirral Drives:Golf mk4 GTI
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have you serviced it recenlty?
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
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its having a full service at the end of the month..
ive got 100miles to £20
i sorted all the sensors etc out a few days ago and its got better,i was doing 70miles to £25 about a week ago..
what sort of mpg range is mine meant to be roughly?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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I'd say 150 miles to twenty would be fair.
A service (everything, filters, plugs, leads, oil) would help
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LukeD
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Registered: 23rd Jan 07
Location: Shropshire
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Overfuelling cause of the engine mods. needs ecu re-mapping.
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deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
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Yeah, your engine mods could be causing over fuelling which would in turn affect fuel economy.
Generally speaking, my 12v is 10p/mile (less now at today's petrol prices) however yours is double that, so 150 to £30 fill up. I'd say that is quite bad, even for a 1.4 16v.
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tom_simes
Show Staff
Organiser: South Wales
Premium Member
Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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Mine has Lexmaul, Full exhaust including decat and 4-2-1 manifold and BMC CDA, and I got 39 mpg on a motorway run to the NEC and back on Thursday, driving at a steady 75 mph too.
Your economy isn't too bad that it points to the CTS, as mine was doing about 8 mpg when that went. Take the spark plugs out and check them over to make sure its all cylinders running very rich too - I changed my plugs on Sunday as they had become black, but I was stil gettng reasonable economy.
Apart from that, I don't have any other suggestions, sorry.
Edit: Are the cams dialled in correctly do you know? Or even timed up correctly? Any idea on the specs of the cams?
[Edited on 13-01-2009 by tom_simes]
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Minty_Fresh
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Registered: 1st May 08
Location: westmidlands
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i dont no what cams they are, they seem quite wild from experience..
it aint got vernier pulleys so not timed up 100%
whats the CTS mate?
so yours was doing bad mog when that went but fine now with a new one?
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tom_simes
Show Staff
Organiser: South Wales
Premium Member
Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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Coolant Temperature Sensor, its by the thermostat on the front left of the engine block as you look into the engine bay.
Yea, my CTS died and the car was doing 8 mpg - it killed my cat, and wouldn't drive very well at all once warm, but that was replaced, along with a new cat, and its all fine now. That was about a year ago.
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Minty_Fresh
Member
Registered: 1st May 08
Location: westmidlands
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ohh, mine runs fine when up to temp though so guess it may not be that 
will be serviced at the end of the month so touch wood that will help abit..
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Stokie Dave
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Registered: 16th Dec 03
Location: Stoke-on-Trent
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You got rid of that daft fuel pressure regulator yet? I bet thats your problem if not lol.
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luke85
Member
Registered: 26th Nov 07
Location: Chesterfield
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A fuel pressur regulator wound right up would cause it, as would a dodgey CTS or a lambda sensor thats got more than 50k miles on it
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D-A-V-E-
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Registered: 2nd Mar 08
Location: Northern Ireland!
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Sorry just wanted to ask a quick wee question....whats a rough idea of how many miles I should get to a tank from a 1.2 16v (standard) thanks
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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DAVE, keep on topic, but, I used to get 400 miles to 45 litres (and I was 17, ragging, cold journeys etc etc)
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D-A-V-E-
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Registered: 2nd Mar 08
Location: Northern Ireland!
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Sorry...knew I'd get stick for it but I would also get stick for starting another mpg thread lol you just can't win on this forum
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