rediculas fuel consumption!
#1
Regular Contributor
Thread Starter
rediculas fuel consumption!
got a focus st170 drives nice I like it but it is DRINKING petrol! I put £40 in it driving normaly and I got 130 miles out of it! 1st thing I checked was for a leak! but nothing had a scanner to hand so scanned it and nothing. so took it down the road and got an emissions test done. the lambda is up at 1.7 and hc is wayyy up at 0.700!! so clearly this is the problem. I serviced the car only a month ago. new cambelt and waterpump too. ut drives and runs lovely feels fine. what else could cause this ? any ideas also had a new stat aswell just seeing if there anything common on these. I know there juicy anyway etc etc but iv worked it out and im getting 19mpg!!! any ideas ?
#2
I've found that life I needed.. It's HERE!!
A lambda of 1.7 means there's a lot of oxygen in the exhaust gasses.
Probably a substantial leak in the exhaust manifold, this will fool the oxygen sensor(s).
Probably a substantial leak in the exhaust manifold, this will fool the oxygen sensor(s).
#3
Advanced PassionFord User
19mpg, that's not bad. I get about 24mpg on a run, and at great speed it will drop to around 14-16mpg
My car is serviced well in advance of anything needed doing, and I work at a Ford dealership, so it seems to pretty normal.
My car is serviced well in advance of anything needed doing, and I work at a Ford dealership, so it seems to pretty normal.
#4
Regular Contributor
Thread Starter
that aint normal mate. im driving the car like a girl!!! and I mean that becayse iv got black box insurance. im a technican by trade for volkswagen. I just wanted to know if there was anything common on these cars before I start digging. my friend had an st a year or so ago and he was getting about 30mpg out of it.... my brother has a bm 645 v8 and that does 16 per gallon...
#5
Advanced PassionFord User
I think Ford quote 22mpg for urban use, although I can check when I get into work tomorrow..
But they aren't brilliant. Mine has new plugs, oil, filters every 3000miles, but as I said, it's mainly used in 2nd and 3rd gear
But they aren't brilliant. Mine has new plugs, oil, filters every 3000miles, but as I said, it's mainly used in 2nd and 3rd gear
#7
Regular Contributor
Thread Starter
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#9
PassionFord Post Whore!!
Do you mean HC 700ppm (seven hundred)?
Or do you mean 0.700? As in less than 1 (0.7)
1.7 lambda would indicate a lean mixture.
0.7 lambda would indicate rich (on an idle/fast idle emission test)
Or do you mean 0.700? As in less than 1 (0.7)
1.7 lambda would indicate a lean mixture.
0.7 lambda would indicate rich (on an idle/fast idle emission test)
Last edited by GVK.; 12-02-2014 at 07:54 PM.
#11
Ben
They are hugely shite on fuel, not a problem with your car I'm afraid!
#14
Spanner monkey
Haveyou had the fault codes read? the inlet runner motors / linkage fails on these, doesnt always put the MIL light on, my mates one did it, started, ran fine but was shite on fuel, google / youtube it, we followed the guide on youtube but it didnt fix it, put a new motor / linkage on it, sorted!
#15
Regular Contributor
Thread Starter
hi mate ment to mention I already done this fix as wen I 1st got the car it had the mil light on for runner stuck open! thats working fine iv checked it fuel is the same as wen that wasnt working to how it is now. also lambda was 1.70 so high... which I know indicates lean. hc was 0.700ppm which indicates rich
#17
Resident Wrestling Legend
iTrader: (3)
simple things like making sure it gets up to temperature could cause huge fuel consumption
thermostat broke on my mondeo and the mpg dropped to single figures (not that i was great in the first place around town as i was used to getting 17-19 mpg but with the thermostat it was COLD inside too)
thermostat broke on my mondeo and the mpg dropped to single figures (not that i was great in the first place around town as i was used to getting 17-19 mpg but with the thermostat it was COLD inside too)
#18
Regular Contributor
Thread Starter
i done a stat on it when i 1st bought it. i put another £40 in and drove from london to norfolk and back and when the light come on i hit 240miles!!! so 110 miles more than last time... ok alot of it was motorway but alot was also traffic etc. so that works to 35.4 mpg. thats a bit of a difference. maybe the fuel i got was pisswater!!
#19
Too many posts.. I need a life!!
Have you reset the ECU?
Take the battery off overnight. Put it back on then drive it like a granny for the first few miles. Might improve it as I am lead to believe they have a learn function.
Take the battery off overnight. Put it back on then drive it like a granny for the first few miles. Might improve it as I am lead to believe they have a learn function.
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