37 replies to this topic

[mykweb]

ha iv a girlfriend the exact same neva lets me work on my mini!! the way i checked mine was to pull the black pipe from the ecu and stick it to your cheek to see if there is suction

and pray it comes off.

Don't mistakenly stick it to your neck or the other half will certainly ban you from the garage .lol


Mike

[dennisb]

OK cbyrne - noted also - I'll try that too.

Got the contact cleaner so I'm good to go later

Thank you all.

[dennisb]

Well, got out for a wee bit today. Checked the leads, sparks and firing order. All there is fine and working correctly.

Got the MAP sensor out and cleaned and back in, same with the Inlet temp sensor and the IAC. They were all a bit grotty inside and out - not real manky, but defo not clean anyway.

The car started instantly, still with a bit of smoke though. Revved freely and idled smoothly too.

Didn't get it out for a drive because I still want to do the other things you both told me about.

Another question... I couldn't find a vacuum pipe at the ecu. Does the mpi have one?

[mykweb]

The Mpi does not have a vac pipe that connects to the ECU.

The vac pipe runs from the brake servo, to the inlet manifold. Thin back pipe that goes into the inlet manifold just beside the Idle Control Valve (big blue plug on the left hand side)

Mike

[cbyrne]

now my mini slightly miss fireing but its when its cold. sorry mines i spi dose the mpi have the injector above the throttle body??

[dennisb]

I must say I am pretty confused by all this injection caper...

The people who fitted my fuel pressure regulator (who will remain un-named) have put it in the most strange place - away down at the front of the passenger side wing, by the horn. On top of that, the thing I thought was a vacuum hose , therefore carrying air, turned out to be full of fuel (going into the throttle body). If you saw my bay, you'd see that it's all a bit mad and chaotic. I wish I could find someone who could get the pressure regulator in a normal place near the gubbins and tidy up the pipes.

would a Mini only place be best for this, or would any competent fuel injection specialist type place be able to sort it?

anyhoo - tomorrow, I'll clean out the coil connections and the other things Mike mentioned to me that I haven't done. Hopefully I'll find more manky bits - it feels good that way because then I'm actually knowingly cleaning stuff and hopefully doing some good.

[cbyrne]

how much pressure are you putting through your reg?? id try turn it down a bit first. it makes sence missfire the car cant burn all the petrol. smokey unburned fuel causing rough idle if you give it a hard rev will it back fire?? but it turn the fuel down a touch as for where the reg is mounted what was he thinking. if your horn shortded out there be a huge quite possibly fatal fire!!!!!!

[dennisb]

I know how alter the fuel pressure, but I don't know if an anti-clockwise turn of the nut is an increase in pressure or a decrease - and vice versa

I suppose I could turn it one way (remembering/marking where it was) and if it makes no difference, try it the other way. Again, if no difference, put it back where it was originally.

[dwealds]

Hi, I have the FSI boost valve on my Mpi Stage 4 and if i remember rightly its clockwise that increases the pressure. I also get the popping when coming off the throttle when its cold but again i agree that it is un-burnt fuel in the exhaust.

It seems that no one knows where to mount the boost valve , lol, the company that did mine (shall also remain nameless) sat it next to the expansion tank so I did the job properly and made a bracket for it up the back near the fuse that sites on its own.

[mykweb]

in all fairness its not that much of a hard job to do. But I think garages get confussed when they look under the bonnet of the Mpi. Scares most of them

Mike

[dennisb]

Turned down the fuel pressure a half turn and took it a drive, it was clearly short on fuel so I put it back a quarter turn. Felt fine on the next test drive, as far a fueling goes, but still had the same old problems at the same revs (about 2000 and about 3000)

The vacuum hose coming from the brake servo is bent at a bit of a sharp angle. It's not closed, or even anywhere near it, but it's not the way I'd want it. I can't sort it because the pipe above it that's squashing it down is dripping fuel as soon as I loosen the clip.

I could find no other squashed pipes, or even melted or split pipes.

If you look at the photo below, I did find a pipe connected to nothing! The green end was tucked away in below the reservoir.

 IMG128__Medium_.JPG   264.08K   30 downloads

Cleaned the coil and ecu connections - all seemed ok here.

All coil connections are fine and in the right order, as are plugs/sparks and leads.

Cal me a dumpling, but I couldn't find the cam sensor! According to my haynes, it's at the back of the cylinder head and visible when the air filter's taken off - couldn't see it! OK with finding the inlet temp sens, lambda, map - but couldn't see the cam sens at all.

When I was in, I decided to put my pipercross filter back on - love the noise! Had to do something productive!



Anyway, after all that, I took it one more drive and it's still generally wonky.

[mykweb]

correct that pipe is the return pipe to the fuel tank, once the fst valve is fitted it takes out the fuel tank return

That is whey is blocked off.

The cam sensor is down the back of the engine right hand side just on the line where the subframe is

Have you had the car on teh diagnotics machine yet?

Mike

[dennisb]

The only two I know of are in Edinburgh - The Mini Works and McDonald Minis.

There's a place in paisley that does diagnostics, but I ahven't been in yet to ask if a Mini would work. I'll call them tomorrow!

I thought that after adjusting the pressure down a bit that it was fixed this morning going to work, because it was going sweetly! Sadly on the way home it did it's things again.

[mykweb]

i am not sure if the mini works has the acr4 reader

I know clarke at mc donald mini's has, becuase he built my engine and jamie his sone helped me fix my engine.

Mike

[dennisb]

I'll see how it goes with this call to the Paisley dude tomorrow.

Discovered another thing... my exhaust doesn't have a flexi-joint thing. I wouldn't think this would affect performance, but it's there for a reason, so does anyone know if not having one would cause any ill effects? Sometimes I hear a knocking noise, that could be the whoel system moving and hitting things right? Could this moving not weaken bits due to excess movement?

Sorry about all the questions!!!