Where is my fuel leak?

[allstaruk]

Alright boys and girls,

Finally finished putting my car back together today, the new battery arrived so popped that in and its time to fire it up, its not been run for about 2 months and since its last run I\'ve fitted; intecooler, 850cc injectors all round, FPR braided lines with aeroquip connectors, radiator, induction kit downpipe and many other little bits.

Anyway, turned the key and it fires up for about 2 secs then died, turned the key again and it just turns and turns with out catching, stopped when I could smell petrol, had a pretty good look about the top couldn\'t see a fuel leak had another go, still won\'t start and I smell fuel again, stopped had a look about and there is a puddle of fuel under the car.

Jacked the car up and got under it and its dripping fuel out at a pretty constsant rate, so I took the plenum off and had a good look about, the fuel rails and hoses are not leaking so getting under it I had a look at the fuel is dripping from under one of the turbo heat shields anyone got any ideas?

I\'m pretty lost.

Alan

[Fish]

You can pressurise the system with the manifolds off. Do this as it may not show without the pressure there.

There is no fuel on the wrong side of those manifolds.

Fish

[allstaruk]

Eh? Your going to need to explain that to me mate?

Cheers

Alan

[nikp]

You can turn the fuel pump on by grounding the fuel pump diagnostic port. Think it\'s labelled fp or something. That will pressurize the system and you can check the fuel lines then. You won\'t have to start the car. In the engine bay there are only three lines: feed, return and the purge line. Feed goes to FPR then primaries, then secondaries then returns, as you probably know. That\'s it.

Have you had the ECU setup for the 850 primaries? I\'ve read that the car won\'t start without having it setup first.

[allstaruk]

Yep got the ecu setup for the 850\'s all round my concern is where is the fuel comming from, I can\'t see a leak anywhere on the fuel system it appears to be coming from somwhere behind the twin turbos setup,

My fuel setup goes feed to primarys to secondays to FPR to return line, or atlease I\'m pretty sure it does can someone confrm what I have to ground to get the fuel pump to come in.

ALan

[Carl]

Alan,
It sounds like the engine could be flooded.
Take the egi fuse out and then take ALL spark plugs out,turn engine over by hand on front pully,I am worried that the engine may be full of fuel cos the injectors might be open and not shutting down,this could be due to wiring to the ECU not being right.If this is the case then the engine could be full of fuel,and needs to be carefully removed.
Also have you had the ECU changed to cope with the 850cc primaries?If then then you have flooded the engine,and will continue to do so until the ecu is properly stup.
Regards
Carl

[K1HKS arse]

Agree with Carl Alan, sounds badly flooded to me.Fuel is dripping/coming from turbo manifold where it joins block or turbo pack.Do as Carl has said and remove all the fuel from the engine first.Are you sure you wired up the inj correctly?You might have damaged the inj o rings or they are not seated properly so fuel is running past/around the inj into the engine.

You say you have set up PFC for 850\'s, what have you done/ what are the settings???

[Joeh]

oh my o__o drain the fuel quick, remove the plugs... err.. oh carl already said that

Don\'t try to start it until you\'re sure the fuel has vapourised out of the system and been pushed out of the engine when the plugs are out.

[allstaruk]

Er ok in no specific order, I went throught the power fc and changed the primarys to 850cc, I have had the ecu in for a while so I know the power fc is wired in correctly, the injectors are all plugged in as they were before hand just with 850\'s in place of the 550 primarys.

Whats the best route to go down to find what if flooding the engine?

Alan

[nikp]

I don\'t think it\'s just a case of telling the ECU you have 850\'s in. I think there\'s some other stuff required that can only be done using the data logit software, and that\'s almost certainly why it\'s got flooded.

[allstaruk]

I\'ll have to fish it out but I\'m sure I got an email from reworx saying I could just change it to 850\'s to get it started.

[allstaruk]

Hi,,

Yes just change them yourself

Geff

-------------------------------------------------

Injectors are different I can adjust that on the power fc myself though
can\'t I?

alan

-------------------------------------------------
> Hi,
>
> Assuming your injectors are the same then you should be fine off
 boost
> to drive down.
>
> Mapping is £295+vat
>
> Geff

Just found this so I assume I can just change the injector settings.

Alan

[nikp]

Doesn\'t look likes it\'s that simple:

http://www.mazdarotaryclub.com/forums/showthread.php?t=37340&highlight=850

[allstaruk]

Just had a quick skim of those threads and they all seem to point to the car starting with 850\'s in the primary as long as you\'ve got the primarys set to 850, the rest is just down to fine tunning,

If anyone can shed some light I\'d be gratefull,

Just pulled the plugs and egi fuse and turned it over on the front pulley a few time gonna leave it to dry out for a bit now.

Alan

[Ricco_04]

I had the exact same problem mate.

I had flooded the engine due to a faulty diffuser o ring.  I ordered a full set of o rings for all 4 injectors and both rails (12pcs) just to be on the safe side but I still had the problem.  This was because the engine was literally full of fuel and cranking it just spit\'s it out back past the injectors.

When I took the fuel rails out to fit the new rubber I hooked the system up externally and tested them to make sure they had a good seal and did not leak.

After a deflood and new plugs all was well.