I predict a Riot
|
| posted on 24/7/12 at 10:16 PM |
|
|
Thirsty
Can the ford boffins provide any help here?
My 1.7l Ford Sigma engine is drinking fuel.. It starts and stops reliably and pulls really strongly but the idle is a bit erratic and the engine seems
to surge and the revs drop off too slowly as if the throttle is sticking - which it isn't.
The engine is running on the original MUFF ECU and engine sensors. The car has only recently been finished and the engine not run for 2 years or more
as the car was built. I have retained the original catalyst and lambda sensor.
Any one any ideas?
Many thanks
Adrian
"Honesty is a very expensive gift. Do not expect it from cheap people ". Warren Buffet on Expectation
|
|
|
|
|
big_wasa
|
| posted on 25/7/12 at 06:33 AM |
|
|
Have you connected up a code reader to the obd2 port ?
If the o2 sensor, maf, temp sensors are faulty then it will bung in extra fuel to make sure it doesn't run lean.
like wise if you have an air leak of un metered air it will also bung in extra fuel.
The great thing about the oem ecu is the ability to view in real time what all the sensors are doing.
Have you got an androids phone ? The torque app is only a few quid and a cheap ebay adapter (not all are equal and work with torque) can be had for a
little over a tenner.
|
|
|
mcerd1
|
| posted on 25/7/12 at 07:41 AM |
|
|
check for vacuum leak first - I had similar symptoms when one of my breather hoses split on my tin-top (focus)
it might not be the only problem, but it doesn't cost you anything to find out 
-
|
|
|
britishtrident
|
| posted on 25/7/12 at 04:46 PM |
|
|
As said check for vac leaks.
Check running temperature (OBDII diagnostic data )
Clean valve and check wiring of idle speed control valve.
Have a look at what the voltage output from the lambda senor is doing either by OBDII or direct connection to the sensor -- it should flicker up
and down between 0.1 and 0.8v between 1 and 3 times per second when warmed up.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
britishtrident
|
| posted on 25/7/12 at 04:51 PM |
|
|
quote:
Originally posted by big_wasa
Have you connected up a code reader to the obd2 port ?
If the o2 sensor, maf, temp sensors are faulty then it will bung in extra fuel to make sure it doesn't run lean.
like wise if you have an air leak of un metered air it will also bung in extra fuel.
The great thing about the oem ecu is the ability to view in real time what all the sensors are doing.
Have you got an androids phone ? The torque app is only a few quid and a cheap ebay adapter (not all are equal and work with torque) can be had for a
little over a tenner.
Apart from being generally iffy very cheap usb or wifi dongles usually don't work on most Fords ............... however cheap hand
held scanners do.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
MikeR
|
| posted on 25/7/12 at 05:30 PM |
|
|
he your going to get an o b d scanner for a ford look for a ford super scanner. they're supposed to work. I've got one but haven't
tried it yet.
|
|
|
I predict a Riot
|
| posted on 25/7/12 at 09:00 PM |
|
|
Thanks everyone.
I'll take all the advice on board and get a code reader from eBay.
I didn't know about the voltage output from the lambda sensor.
Good advice, thanks.
"Honesty is a very expensive gift. Do not expect it from cheap people ". Warren Buffet on Expectation
|
|
|
