|
I haven't been thrashing it because I've been trying to save fuel. It had a big service a couple of weeks before I got it, all filters, oil, coolant e.t.c. Tyre pressures are all at 32psi. It's only done 87k from new, which isn't bad for a 10 year old car i suppose. I've just put £40 in the tank which is about 33 litres, I put a bottle of injector cleaner in aswell so I'll see if anything improves. I know there's something not quite right, and if you were to drive it yourself you would definitly notice something out of place. Going by the high fuel consumption I have to guess that it's overfueling, but I'm getting no smoke at all out the back, not even on the first start of the day. If it's not raining this weekend I'll get stuck into it and see what I find.
Edited by marty1979 on 06/12/2007 at 19:51
|
140 miles on £20 is dreadfully poor for a 1.8TD. You should really be getting circa 200 miles on £20, which is roughly what I get from my 1994 306 1.9TD with 211k on the clock on a mixture of urban and motorway driving.
Martin
|
|
That's what I thought. I haven't had a chance to have a look around under the bonnet this weekend because of the weather. I've read a lot about something called ecotek power boost which is supposed to clear out all the carbon and sooty deposits inside the cumbustion chamber, I think I'll give it a try as I've heard nothing but good things about it.
|
You definitly seem to have a problem, as driven in the same style, the turbo should be better on fuel as it will generally be running on a weaker mixture and is probably higher geared. Make sure your calculations are correct by filling the tank to the brim and then filling up again after a measured distance.
Peter.N.
|
Just for comparison purposes, I get an average of 45 mpg brim-to-brim from the Mondeo which has an identical engine, but lugging along a heavier car.
Assuming a litre of fuel is £1.08 and a gallon of fuel is £4.86, that means 45 miles for £4.86 or about 92 miles for every ten quids worth. Over a tankful I usually get 550-570 miles for £60 ish.
I would expect the Escort to comfortably beat that, as it's about 200kg lighter.
Cheers
DP
--
04 Grand Scenic 1.9 dCi Dynamique
00 Mondeo 1.8TD LX
Edited by DP on 11/12/2007 at 23:47
|
|
Thanks for your input guys. I put £40 in the tank last Thursday, around 33 litres , the needle was dead in the middle of the last mark and the 3/4 mark on the gauge. Since then I've driven 220 miles and It's almost on the 1/4 mark on the gauge. It's obviously using too much fuel, but what I don't understand is where it's going, because there is never any smoke when driving or at tick over, wouldn't overfueling cause a smoke cloud everytime I plant the accelerator?
Edited by marty1979 on 12/12/2007 at 11:15
|
|
Just done 300 miles on £40, around 37 litres. Something not right!
|
How is the boost pressure comunicated to the injector pump? Is there a boost control diaphragm on the pump? If so, is it working?
Does the turbo have a wategate? If so, does it work?
Number_Cruncher
|
|
The engine I've got is the 70ps version, this doesn't have a boost diaphram, so to be honest I'm not entirely sure how the turbo communicates to the pump. I think the wastegate's working ok, although apart from totally disconnecting the pipe I don't know how to test it. I have noticed that there is a slight kick when I let off the pedal from full throttle. It must be overfueling don't you think?
|
surprised noone has said have u checked the fuel pump for leaks as these pumps do leak after a time..Try running the engine with a piece of cardboard under the engine and see if u get any drips on it this may take around half a hour of running as it sounds like the pump may only have a slight leak but will get worse.
thats if its leaking..
Also check the induction pipe just after the turbo as these do collapse
|
|
I've heard about the leak problem, but I'm certain there's no leaking anywhere on the fuel system. I was into the red on the gauge so I put £48.75 in the tank yesterday, 45.60 litres pricisely. Now, I went to the handbook to have a look at the tank capacity and it says 55 litres, so that would tell me that when my gauge is on the red there is still 10 litres or so in the tank. 10 litres is 90+ miles, so that would explain the loss. So I'm thinking it's the sender that's not quite right.
|
I believe they do have a boost diaphragm, what type of pump is it lucas or bosch?
The difference between my mondeo engine and the lower power versions is lack of intercooler.
On mine I noticed that if I fiddled with the max speed setting I lost power at full throttle, accelerating better when I lifted off, on the lucas pump the throttle effects both governor spring and max dynamic advance I think, check ur max speed, my mondeo will only rev to about 4600, my mpg is not so good if I drive flat out as the boost and fuelling is non standard, but when I drive steadily, mpg is really good, if u were overfueling u would expect smoke unless u were overboosting, which CAN LOOSE power! smoke would also occur I suppose.
The reason is that when the turbine efficiency envelope is gone beyond, the extra temperature developed reduces charge density, so although higher pressure less air is getting in!
Are u sure it has correct fuel pump fitted?
Check the following:
Wastegate actuator pipe split?
Boost diaphragm compensator pipe- the compensator on the lucas is at the front next to advance solonoid.
Does the pump make noise? bearings fail on the lucas- this has the effect of stopping advance working properly and can cause leaks on the pump seal; as the dynamic advance is controlled by fuel pressure in the pump a leak will reduce advance!
Is the timing correct?
Is there a leak in any boost pipes? can u hear the turbo whistling loudly?
often cars smoke when this happens but the compensator on some cars prevents this.
Does it have an exhaust particulate filter? these can clog up especially if it used to smoke, obviously a clogged exhaust will cause low power excess mpg!
Does it start OK? compression, injectors etc, again smoke is caused by worn injectors!
hope this helps.
|
|
tpvalley, thanks for your reply. The pump I have is Lucas and it is the right pump for the engine. I have no idea where the max speed setting or any other like it is apart from the max fuel screw inside the pump, which I don't think has been touched (are they the same thing?). I've checked the wastegate pipe and it's not split, although when the pipe is connected to the actuator I can hear what sounds like and air leak coming from the actuator itself. There is no boost pipe next to the advance solenoid as I had to change the solenoid not long ago and there's definatley nothing else around that area. The pump isn't noisy, it isn't leaking, it starts perfectly everyday, the turbo is quiet (no whistling), I've ran power sport 4 through 2 full tanks now so I would think the injectors are pretty clean. The power is ok for what it is, again it never ever smokes, doesn't use oil, doesn't overheat. I have noticed lately that the idle is a bit high.
|
|
The only real test is brim the tank do 100 miles and brim the tank again. This will kill or cure the issue with the fuel sender.
|
|
Agreed, I'll do that over the holidays. Merry christmas to all.
|
i know this is nearly 2 years down the line but i have the exect same problem
same engine, symptoms, fuel figures etc
did you ever find out what was causing it?
any help would be great
thanks
|
i think ive cured it, last sunday i started smothering around the turbo manifold (as i was planning to remove the turbo) with wd 40. eventually i found that the van was starting to perform better and running cooler and also fuel comsumption had dropped.
mpg tests are still ongoing but it will go for it now with decent pull all the way through the rev range.
so in short it was a sticky actuator valve (i think and hope
|
|
