Help, I'm Lost

[richo_i]

At last I have the engine rebuilt and back in MOH but have hit a brick wall, I will try and explain as best as possible what's going on. If I connect the AFM electrically and leave the air pipe of the plenum she starts realy well and purrs like a new car (as she should with the money she has had spent on her) but as soon as I connect the pipe to the plenum she starts to throw massive amounts of fuel in resulting in clouds of black smoke and real ruff running (Original problem) I have priced a new AFM £300 and being out here have no one to borrow one from so is there any other possible cause before I spend out on it too find it is not the AFM at fault

[rev-erend]

OK - I'm not the worlds greatest expert on the flappers..

But first question first.

Was the EFI running reasonably OK before you had the engine rebuilt.

If so - then you probably have not re-connected something correctly.

This site might help :

http://www.wedgeneering.co.uk/Lucas%20Diagnostics....

[richo_i]

This is the exact problem that led to the rebuild Due to the over fuelling the oil had become too thin and that caused loads of problems eg bearing wear, But we had it down to the extra fuel injector malfunctioning this is now blocked off there for eliminated as the problem .

[rev-erend]

When not borrow one from the wedge parts list haud to confirm the problem ..

http://www.pistonheads.co.uk/gassing/topic.asp?h=0...

These guys have a loanable spare
AFM (TVRleigh) (Adam Quantrill) Chedder

Edited by rev-erend on Monday 6th October 16:16

[richo_i]

If someone offers it would help just thought my location would make it difficult for such a large item

[rev-erend]

richo_i said:

If someone offers it would help just thought my location would make it difficult for such a large item

Are you in Wales ..

[richo_i]

I am indeed

[pwd95]

I'll ask around down here tomorrow.

[rev-erend]

It may be the flapper is jus not adjusted right..

You have only so much adjustment on the co screw but after that you have to set the adjustment via the big toothed wheen that is under that top cap ..

It's not that hard it you have a co & HC meter - most garages have one.

[adam quantrill]

Number one to replace is the £12 Engine Temperature Sensor. It's a classic cause of this type of overfuelling.

[richo_i]

adam quantrill said:

Number one to replace is the £12 Engine Temperature Sensor. It's a classic cause of this type of overfuelling.

Got one here some where but can hell as like find it, another on order will update once fitted.

[350zwelgje]

richo_i said:

adam quantrill said:

Number one to replace is the £12 Engine Temperature Sensor. It's a classic cause of this type of overfuelling.

Got one here some where but can hell as like find it, another on order will update once fitted.

And even new sensors can be duff....

Quick test is to just short the sensor leads out. It will make the ECU 'think' the engine is hot and it should run lean. If still overfuelling, something else is wrong. I had once issues with the dreadfull sensor and later the ECU causing overfuelling. Sorted by: new sensor (while driving the wedge with a paperclip solution for over a month), and had the ECU resoldered.

Hope you'll short it quickly to enjoy the nice engine you have now.

Rob