Spluttering

[georob]

My 89 320 has started spluttering when you accelerate and sounds like its running rough.

Could this possibly be related to me starting to use sainsburys super unleaded?

checked the filters, pipes etc, all clear

Anyone any idea?

Thanks

[georob]

just checked the spark plugs, they seem very sooty

would resetting the ecu help this problem at all?

if so, how do i go about resetting it?

thanks

[kam-325i]

Does the car do it when hot or cold (Engine) ?

[georob]

does it both kam

[kam-325i]

Sooty spark plugs indicate overfueling.......have you had a look at the blue temp sensor on the thermo housing, it could be that causing the problem...or maybe a dodgy FPR....

[georob]

how would i check the sensor kam?

[kam-325i]

how would i check the sensor kam?

You need to measure the resistance of the senor on a cold and then a warm engine. Brianmoore will be be able to tell you the values.

[georob]

one thing i noticed is when im sitting and change through the obc kmh/ mph settings, on the mpg when i reset it, it shows 27.4 then drops to 9.4, it does this every time

does that shed any more light on my prob?

[georob]

bump

[Brianmoooore]

does that shed any more light on my prob?

None whatsoever!
Blue temp sensor:
cold: 3910 ohms
cold water from tap: 3400 ohms
hot water from tap: 980 ohms
very hot water 306 ohms.
These were actual values measured from a good sensor. The faulty oone it replaced gave each reading about double.

[georob]

thanks brian

will check it out when the snow subsides a bit