13 replies to this topic

[Chris Donaldson]

Anyone else had a problem with their MiniSport 85/90 BHP conversions overfueling at idle? I find that it runs spot on however as soon as I’m stationary, so at idle then the car builds up fuel in the exhaust which it gets rid of in the form of a not so lovely grey cloud as soon as press the accelerator. My concern is getting it through its next MOT in this state. I was told that Specialist Components do an ECU that would be programmable and could potentially be set up to stop this however at £975 plus vat just for the parts let alone setting it up then I’m reluctant!

Anyone else had this issue?

[pdaykin]

Are you sure it is fuel and not oil ?

[cian]

Is there a fuel pressure regulator on it? If so is it set to 3psi

[Chris Donaldson]

It’s definitely fuel and not oil.

It has a fuel boost valve. I don’t know about pressure.

[Steve220]

It’s definitely fuel and not oil.

It has a fuel boost valve. I don’t know about pressure.

 

Did you have the boost valve set up on a rolling road?

[Alice Dooper]

Is there a fuel pressure regulator on it? If so is it set to 3psi

Hmmm. Fuel pressure regulator......................

[cian]

Chances are the pressure is to high overfeulling it, get a £15 gauge on it and set it to 3 psi

[bluedragon]

Is there a fuel pressure regulator on it? If so is it set to 3psi

 

On a fuel-injected Mini? If it's fuel injected, it won't even start on 3 psi. (this is the injection mini subforum)

 

 

Dave

[cian]

I know this is the injection subforum, needs set to 3 bar not psi my mistake, raising the pressure will enrich the mixture and vice versa, as I said best get a dial on it and see where you are at

Edited by cian, 22 February 2019 - 07:21 AM.

[JoshuaTam]

At this moment don't think about the SC ECU, it will just give you more problem as the Specialist components ECU is not really plug and play. If you want to upgrade to a standalone ECU, you must make sure your engine management system is healthy.

Please specify what type of mini you are driving and also which kit from minisport you installed.

I did installed a 85bhp upgrade kit from minisport, that is a cylinder head and exhaust system replacement only and still using the original engine management system. Are you installed the same kit with me?

If you installed the same kit with me, you may have leaking oil from the cylinder head gasket. Check your oil level first.

[JoshuaTam]

At this moment don't think about the SC ECU, it will just give you more problem as the Specialist components ECU is not really plug and play. If you want to upgrade to a standalone ECU, you must make sure your engine management system is healthy.

Please specify what type of mini you are driving and also which kit from minisport you installed.

I did installed a 85bhp upgrade kit from minisport, that is a cylinder head and exhaust system replacement only and still using the original engine management system. Are you installed the same kit with me?

If you installed the same kit with me, you may have leaking oil from the cylinder head gasket. Check your oil level first.

[mini13]

the other possibility apart from fuel pressure is an iffy injector, they can dribble which would mean rich at low fuel rates, and also the fuel spray pattern may be rubbish making it harder to atomise/ burn. probably worth pulling them and getting them checked/cleaned.

 

any signs of a pair of plugs being blacker?

 

also possible, is an iffy temp sensor, this should show up on a scan. come to think of it how about the thermo stat, you should have an 88 in there.

Edited by mini13, 02 March 2019 - 11:27 AM.

[jamesquintin]

Mine was fine, just had problems with the valve stemes leaking on the new head. It went back to Minisport and was fixed (even though they said there was nothing wrong with the head...)

I had min setup on a rolling road and set to 3bar. All the emissions were fine

 

 

Q

[Retroman]

Anyone else had a problem with their MiniSport 85/90 BHP conversions overfueling at idle? I find that it runs spot on however as soon as I’m stationary, so at idle then the car builds up fuel in the exhaust which it gets rid of in the form of a not so lovely grey cloud as soon as press the accelerator. My concern is getting it through its next MOT in this state. I was told that Specialist Components do an ECU that would be programmable and could potentially be set up to stop this however at £975 plus vat just for the parts let alone setting it up then I’m reluctant!

Anyone else had this issue?

 

Fuel in the exhaust ???

 

How can it get there ? it is defying the four stroke cycle and combustion and it can only be a matter of time before it goes bang....

 

Its more than an over fueling issue, you need to contact Msprt

 

A kit should be a kit, fit forget and enjoy