another wedge starting problem

[barrington]

was ready for the mot yesterday but car would not start. checked fuel pump and its not working change it for a spare from (dave )superwedge car starts for a couple of seconds then stops try starting again give it some throttle it will rev then die and there is lots of white smoke and a strong petrol smell im going to put the 400 fuel pump on to see what happens any idears would be great cheers
dave

[Danny Hoffman]

"White smoke and petrol smell" sounds like you've flooded it.

Is your cold start injector connected (can't quite see from the photo on your profile? If so disconnect it.

[barrington]

ill do that now and see what happens the 400 fuel pump is f~~cked been sitting on the car for 14 years and not been run so cant moan

[barrington]

unplugged the cold start injector car wont start reconnected then unplugged the air flow meter car will run but still over fuelling

[Danny Hoffman]

Is the ECU multiplug lose? (I'm assuming it's a flapper setup)

[barrington]

no already checked car was running fine pump went now this problem going to change air flow meter see what happens

[Danny Hoffman]

In that case might be worth checking the fuel pressure

[barrington]

did wonder if pump was over pressure rising

[Danny Hoffman]

I was thinking that maybe some crud got through the faulty pump and jammed the fuel regulator open.

Would be worth swapping the ECU if you have a spare too

[The Hatter]

Sounds similar to mine, Dave! I got mine sorted now, it turned out to be damp inside the AFM.

There's various websites out there with a fault finding sequence for flapper systems; get hold of that and work through it - it worked for me... give me a shout if you can't locate it. I started off down the route of substituting everything and couldn't find the problem, I can't recommend that course of action as if the engine is overfueling (your symptoms suggest that) then you'll be washing the bores and diluting the oil with fuel - very bad!

[barrington]

picked up a couple of ecu and air flow meters and an afm from hallsie back out there tomorrow after work and have a go

[barrington]

Danny Hoffman said:

I was thinking that maybe some crud got through the faulty pump and jammed the fuel regulator open.

Would be worth swapping the ECU if you have a spare too

cheers was going to swop the fuel regulator from my 400 and give that a go

[barrington]

The Hatter said:

Sounds similar to mine, Dave! I got mine sorted now, it turned out to be damp inside the AFM.

There's various websites out there with a fault finding sequence for flapper systems; get hold of that and work through it - it worked for me... give me a shout if you can't locate it. I started off down the route of substituting everything and couldn't find the problem, I can't recommend that course of action as if the engine is overfueling (your symptoms suggest that) then you'll be washing the bores and diluting the oil with fuel - very bad!

cheers martin im not running for long as I was worried about dumping loads of fuel down the bores this all started after I changed the fuel pipe at the rear for the mot then the pump died change that and all this has happened

[Danny Hoffman]

I used to have an old 911 with an oil level gauge (dry sump) and whilst sat in traffic noticed the oil level raising. It transpired that I had a fault with the fuel metering head (similar to the 280i setup) and my sump was filling with petrol. Might be worth changing your oil once it's sorted

[barrington]

Ye will do

[barrington]

had a quick play tonight tried a couple of afm borrowed from stue (hallsie) and I can get it to run but still very rich and getting smoke fitted the fuel regulator from my 400 no change spoke to martin (the hatter )and he has sent me some info to check so will have a read and at the weekend have another play

[Wedg1e]

Could be overfuelling due to the old ECU solder joints issue...

[barrington]

Wedg1e said:

Could be overfuelling due to the old ECU solder joints issue...

ye that's another thing to look at I have two spare ecu I borrowed from hallsie to try

[Danny Hoffman]

If you end up with a dead ecu you can't repair and are going to bin can you throw it my way?

I'm trying to build up a 100% working spare since my recent ECU probs

Cheers

Danny

Edited by Danny Hoffman on Wednesday 5th June 09:34

[MrPicky]

Check the temp sensor at the top of the engine (next to the thermo-time sensor). If this is duff or not connected then your engine will overfuel because it thinks it is cold.

In this sort of weather you can simply short out the connector to test it.

Russ