158km from 68 litres

Paris Hilton · 01-09-2005, 05:06 PM

Yeah, as the title suggests.

I've replaced the MAP sensor, but to no avail...

The car runs fine, and goes fine (has troubles with stalling if you start it then let go of the accelerator, you have to hold it at about 1500rpm for a minute or so or it'll just stall, but once it's going it'll idle happily)

All I can think of is a leak somewhere. I haven't noticed anything on my driveway, and losing 40 odd litres of fuel seems a bit accessive, surely it'd make a more apparent leak :\

Any ideas? As you can guess, i'm getting pretty fed up with buying $100+ of fuel each week.

Thanks

stockstandard · 01-09-2005, 05:10 PM

did you check the plugs?

efgoofy · 01-09-2005, 05:10 PM

might be a pressure leak from somewhere, only happens when the fuel is pumping, any leaks in or around the injectors anywhere....?

Dannopower · 01-09-2005, 05:12 PM

I'd suggest you either have a massive flow problem with either the Injectors, considering it stalls (Im guessing as its flooding below 1500 rpm) or the fuel pump maybe?

gtfpv · 01-09-2005, 05:20 PM

injector stuck open id say .or major ecu fault

Paris Hilton · 01-09-2005, 05:21 PM

Quote:

Originally Posted by stockstandard

did you check the plugs?

they are absolutely CAKED in carbon

Racecraft · 01-09-2005, 05:23 PM

one or two bad injectors was what i was thinking of too

Paris Hilton · 01-09-2005, 05:23 PM

Quote:

Originally Posted by Dannopower

I'd suggest you either have a massive flow problem with either the Injectors, considering it stalls (Im guessing as its flooding below 1500 rpm) or the fuel pump maybe?

yeah the fuel pump got replaced a few months ago...how do you check if injectors are playing up etc?

gtfpv · 01-09-2005, 05:26 PM

you need to take it to a fuel injection specialist or ford.

Valknutr · 01-09-2005, 05:36 PM

thats only $70 something for the trip not bad...

Perana · 01-09-2005, 05:45 PM

Sound like injectors to me too, MAP or oxygen sensor or a dead other sensor wouldnt stuff AFR's up quite that much.

Have you looked at all the plugs or just 1 ?

Also do an ECU test

Walkinshaw · 01-09-2005, 06:05 PM

a dead MAP will cause this exact problem, however you replaced that so it seems to not be that.

Take your injectors out and get them ultrasonicaly cleaned.

ratter · 01-09-2005, 06:16 PM

Have you checked to see if you have manifold vaccum at the map sensor?

Paris Hilton · 01-09-2005, 06:18 PM

Quote:

Originally Posted by ratter

Have you checked to see if you have manifold vaccum at the map sensor?

how do you check? take the hose off when the car is running and see if it sucks?

sphell · 01-09-2005, 06:51 PM

check your fuel tank for holes!!! LOL, that's shocking!!! A stuffed sensor wouldn't throw it out that much. I'd be checking stuff like split hoses, leaky fuel filter connections, connections to the pressure reg....anywhere where the fuel flows through. Other than that it has to be the injectors. I've got some one ebay, work perfectly for 30 bux if your quick lol ;)

ratter · 01-09-2005, 07:04 PM

Quote:

Originally Posted by slection

how do you check? take the hose off when the car is running and see if it sucks?

yep exactly

ratter · 01-09-2005, 07:12 PM

Quote:

Originally Posted by sphell

A stuffed sensor wouldn't throw it out that much. ;)

a map sensor not reading manifold vacuum would cause that sort of problem also a stuffed coolant temp sensor could also be worth looking at.

on the subject of coolant temp, is the car running at the correct temperature, if you had a thermostat which is jammed open (or removed), the computer could think the car is cold and be running way too rich.

leaking injectors could be a problem, but you wouldn't expect all injectors to be leaking at the same time and if only 1 or 2 where leaking, only those plugs would be fouled.

Have you checked for codes from the computer?

Paris Hilton · 01-09-2005, 07:13 PM

Ok, just had a look at all the plugs.

#1 - split 50/50 red/black
#2 - J red, electrode black
#3 - won't come off
#4 - fully black
#5 - fully black
#6 - fully black

Paris Hilton · 01-09-2005, 07:15 PM

Quote:

Originally Posted by ratter

a map sensor not reading manifold vacuum would cause that sort of problem also a stuffed coolant temp sensor could also be worth looking at.

on the subject of coolant temp, is the car running at the correct temperature, if you had a thermostat which is jammed open (or removed), the computer could think the car is cold and be running way too rich.

leaking injectors could be a problem, but you wouldn't expect all injectors to be leaking at the same time and if only 1 or 2 where leaking, only those plugs would be fouled.

Have you checked for codes from the computer?

haven't checked any ecu codes, however i have recently overhauled the cooling system (to an extent), and it is all running fine (temp wise.)

apart from those 20 or so seconds you have to hold the accelerator on to get it to idle, the car runs fine, no lack of power, and (as far as i can tell) isn't blowing too much black smoke.

klawsterfobik · 01-09-2005, 07:23 PM

You'd know if it was leaking fuel in your driveway or wherever you park it. I mean its not easy to miss 40Litres of fuel sitting on the garage floor, so it would have to be burning it off.

By the look of your plugs, cy 4, 5 & 6 is where your burning it off. They're running rich. Take your injectors out and get them ultrasonically cleaned and see how they come up.

Thats all i can suggest, though im new to all this EFI stuff. If my XY was doing it, id pull out the screw driver and adjust the a/f mixture...

ratter · 01-09-2005, 07:24 PM

Did you check for vacuum at the map sensor?

SileNceR · 01-09-2005, 07:32 PM

someone hasn't been siphoning (sp?) it have they?

naughtyfalcon · 01-09-2005, 07:46 PM

one question,,can you smell petrol any where around the car???

**Stav** · 01-09-2005, 08:04 PM

Your problem is a faulty fuel regulator or blocked return lines to the fuel tank.I think that you have too high fuel pressure

Paris Hilton · 01-09-2005, 09:18 PM

Quote:

Originally Posted by naughtyfalcon

one question,,can you smell petrol any where around the car???

Yep, but i just ran it for about 5 or so minutes between idle and 3-3.5k rpm on my driveway, and i can't see any petrol on the ground.

Casper · 01-09-2005, 09:30 PM

Quote:

Originally Posted by slection

Yep, but i just ran it for about 5 or so minutes between idle and 3-3.5k rpm on my driveway, and i can't see any petrol on the ground.

Did you throw a match under there to be sure?

Sourbastard · 01-09-2005, 09:33 PM

Quote:

Originally Posted by Casper

Did you throw a match under there to be sure?

I didnt realize that Ford made Fuel Air Bombs. Cant wait to see it dropped from a B-51.

Casper · 01-09-2005, 09:34 PM

Quote:

Originally Posted by sourbastard

I didnt realize that Ford made Fuel Air Bombs. Cant wait to see it dropped from a B-51.

shhhhhhhhhhh, you'll spoil the suprise.

Paris Hilton · 01-09-2005, 09:51 PM

Hey, you guys bought AU's, it's not my fault, you guys live with it, just not in my thread.

Sourbastard · 01-09-2005, 09:58 PM

Quote:

Originally Posted by slection

Hey, you guys bought AU's, it's not my fault, you guys live with it, just not in my thread.

Shouldnt you be outside standing guard with a fire extinguisher incase the exxon valdez runs aground?