9 replies to this topic

[Bungle]

a friend has a spi cooper and has asked me if i know how to turn up the tick over, i don't know anything about this voo doo magic injection

it runs well and the mpg is good only problem is it ticks over at about 500 rpm and cut's out most of the time

[Avl_Paul]

I'm definitely no Mini or SPI expert but, from my recent forays into the fuel injection system, I do know the answer to this one. It is not designed to be manually adjustable - the ECU controls the idle speed using the stepper motor and timing advance. If it is low idling consistently, he will have to start stepping through the items on the pinned list - it could be a dead sensor, fuel caught in the MAP line, cracked vaccuum lines, an ECU not commanding the stepper motor (that is what I have), dead stepper motor, etc. etc. If he had access to a diagnostic tool, that'd be the ticket (that's what I'm working on)....

[wolfys_mini]

as above, the idle is controlled by the ecu and sensors etc

[Bevan]

My mini would idle to high, I suspected the stepper motor and took it into my local rolling road, they hooked up a diagnostic computer and found out the idle screw or something another had been messed around with, and the stepper motor was not working correctly. He sorted it out for me and it idles perfectly now.

[Bungle]

i thought it was going to be the dam computer's job

so a garage with a code reader is going to be his best bet

[Bevan]

yer, you cant do much to injection minis unless you have all the fancy equipment to tell you whats wrong.

[DaveRob]

A diag unit has to be plugged in then their is a 'stepper tune' process... thorough the diag unit.... then their is an idle air process again with the diag unit attached. These two proceedures sort the idle speed out. I am happy to do this locally.... maybe Cornwall is a bit far South tho...

DaveRob

[Avl_Paul]

[quote name='DaveRob' date='Jan 20 2008, 02:18 AM' post='810697']
A diag unit has to be plugged in then their is a 'stepper tune' process... thorough the diag unit.... then their is an idle air process again with the diag unit attached. These two proceedures sort the idle speed out. I am happy to do this locally.... maybe Cornwall is a bit far South tho...

Not to hijack the thread, but this sounds like what I need done w/ my Mini but I am abroad so no way of getting the car to you. I have had someone offer to "rent" me a diagnostic unit - are these procedures something I would be able to work through on my own once I have the unit or does it need the high-end Rover unit and training?

Thanks.

[DaveRob]

Got my diags unit from Ebay..... cost me less than $150.... Sprockets advice was the Crypton ACT... works just fine and does everything I need

Edited by DaveRob, 21 January 2008 - 11:14 AM.

[Mini_Magic]

If it was an MPi, you could twist and adjust the square catch on the throttle cable housing if it's too high. The ECU should keep the idle at 800rpm when warm.

Edited by Mini_Magic, 21 January 2008 - 11:26 AM.