my 406 wont start have got code for it and light goes green,but the fuel pump has no power and l have no spark at the plugs.if l bypass the fuel pump it works fine,but car will still not start.can you please help thanks.

Visit 406oc.co.uk mate.

One solution would be to buy an aftermarket electric fuel pump & install it anywhere on the engine compartment wall. Give it a 12 volt source that is active when the key is in the second position (like radio & turn signals) & a ground wire. Reposition the rubber fuel lines to reach ur new pump.
Then u will have a fuel pump & one less ''computer problem'' to worry about in the middle of ur holiday trip.


AAhhh yes, he has no spark at the plugs. l read right past that fact, Mr. Jamin. OK, my answer was a bad one, sorry. Sarcasm is OK when it comes from someone who is truly knowlegeable.

Sometimes the ecu crashes,, disconnect the battery for 10 mins for a shut down & retry. It may be nothing to do with the immobiliser. it sounds like the double relay at fault..

The relay controls engine electrics & fuel pump power. Its usually brown but they can be black.. its about 3 inches long & 1 inch wide. disconnect it by pulling the red catch & check the connections, or connect the two fuel pump pins with some wire if u hear the pump work with the ignition on u know its the relay at fault. l think its the relay cos u have niether spark or fuel & apart from the immobiliser(and the light is green - o.k.) thats really the only (breakable) place the two systems r controlled together apart from the ignition barrel but l take it u have ignition lights so it wouldnt be that..

The double relay, thats the most likely cause of the fault u have descibed.. Cant help anymore without testing things myself sorry.

Now is your chance to unload it, dude.