Thread: Tune Up

Originally Posted by OlliesLRover

Disco1 1994 V8i Auto

Recently had the plugs, plug leads, dist cap, rotor button, fuel filter changed and had the timing checked plus I also cleaned the MAS.

Q. What else is there to a tune up, the car runs pretty well, maybe a bit rich but don't want to spend $ on a tune up if the above is pretty much it.

Regards
Rich

youv'e just about covered it, maybe replace airfilter if dirty. With the dissy rotor did you use the genuine lucas part? other makes like Bosch or generic tend to fail earlier . You could remove the IAC stepper motor and give it a spray with carby cleaner as well as the hole it fits into. Carbon builds up and can affect it's proper function.
Richness could be a maf causing it or a leaking injector. Since it is running with an ECU there is much you can do to tune one

Originally Posted by It'sNotWorthComplaining!

youv'e just about covered it, maybe replace airfilter if dirty. With the dissy rotor did you use the genuine lucas part? other makes like Bosch or generic tend to fail earlier . You could remove the IAC stepper motor and give it a spray with carby cleaner as well as the hole it fits into. Carbon builds up and can affect it's proper function.
Richness could be a maf causing it or a leaking injector. Since it is running with an ECU there is much you can do to tune one

Hi mate, done the air filter with last service ( all these items have been changed/done in the last 1000klm), just had a look at the L/Rover invoice not sure if they are Lucas or not, here are the numbers:
Rotor Button: STC1857
Dizzy Cap: STC8368
Ignition Lead Set: RTC6551

Note: I put the new spark plugs in & just replaced them with the same type NGK BP5ES?????.

Will clean the IAC stepper motor tomorrow, will CRC MAF sensor cleaner do the trick??.

You said:
Richness could be a maf causing it or a leaking injector. Since it is running with an ECU there is much you can do to tune one.

Are you saying that the MAF is/canbe a seperate tune up compared to a gereral tuneup.

I have been checking the fuel per klm by topping it up every 100klm and am averaging around 22ltr per 100klm, I wouldn't call it stop/start city driving as I live in Syd Western Subs, so I reckon I should get better than that even as a worst case senario.

Will tuning the MAF ECU thingy help with fuel economy.

Regards
Rich

The genuine lucas rotors have LUCAS on the top of the rotor button.
Mafs have a set screw on the side, but unless you have specialised exhaust analyiser then I wouldn't play with it.
20 litres per 100kms is about average around town

Originally Posted by It'sNotWorthComplaining!

You could remove the IAC stepper motor and give it a spray with carby cleaner as well as the hole it fits into. Carbon builds up and can affect it's proper function.

I removed and cleaned the IAC stepper motor, it was very dirty & had heaps of carbon build up as well, also cleaned the hole.

I didn't need a spanner to loosen it and found the cork?? washer has virtually worn away, so I will need to try to get another one from some where.

Interestingly the disco has always idled ok, start it up and it revs to just over 1000rpm and a couple of minutes later it drops to just under 1000rpm and stays constant at that when idling.

Regards
Rich

Originally Posted by Roverlord off road spares

Mafs have a set screw on the side, but unless you have specialised exhaust analyiser then I wouldn't play with it.
20 litres per 100kms is about average around town

Thanks for that, I spoke to the L/Rover mechanic today and he suggested I get the injectors cleaned first, then work from there re tuning the MAF.

Sort of proves my point:
20 litres per 100kms is about average around town (Ingleburn).

That would/could equate to 25ltr or more in city (Sydney) driving .

Regards
Rich

Buy some gasket material and make your own gasket if you can't buy an original, I am yet to find the IAC valve body done up tight, make sure you nip it up tight and that the 2 hoses have no splits, Regards Frank.

Originally Posted by Tank

Buy some gasket material and make your own gasket if you can't buy an original, I am yet to find the IAC valve body done up tight, make sure you nip it up tight and that the 2 hoses have no splits, Regards Frank.

Ta, will do.

I thought the IAC stepper motor was just about idling but since I cleaned it, the car seems to have more omph especially when taking off at lights ect.

Regards
Rich

Originally Posted by OlliesLRover

Ta, will do.

I thought the IAC stepper motor was just about idling but since I cleaned it, the car seems to have more omph especially when taking off at lights ect.

Regards
Rich

It also supplies the "Vacuum" for the fuel regulator, so if it is leaking, because of not being done up tight it will cause problems, Regards Frank.