R30 Won't Start

[jrh001]

Hi,

The R30 has been sitting in the yard for two weeks. Usually it starts first time, even after many weeks, however now it fires for a second or two and then dies. After that nothing, the engine just turns over.

If I wait a minute, switch ignition off and then try again, it does the same thing, fires for a second then dies.

I can hear the fuel pump priming. There's fuel in the tank and the fuel filter is full of fuel so the fuel pump is working. There must be some spark because it does fire briefly. Coil is new, and the new coil gives same symptoms as the old coil. No obvious leaks anywhere, battery is fully charged. I recently replaced the temperature sensor and cold start valve (with parts from wreckers) and car was running well when last used.

Any thoughts on what to check next?

JH

[Peter - La La Land]

it might be the Crank angle sensor possible?

[Factory 5]

Id also check if the injectors have leaked and then gummed up (fuel tyurned to varnish like substace) and now blocked.

Same thing happened to me!

It would run for a few seconds then just die.

I found out the cold start injector (the agricultural irrigation like fuel injector in the intake plenum) was spraying enough fuel during cranking to actually get it to run. Once the starter motor stops the cold start injector stops too.

Maybe test it out by un-plugging the cold start injector (simple clip on plug) and see what happens.

[jrh001]

Thanks Andrew,

I'll unclip the cold start injector and test your theory. Is it likely that all the injectors would gum up? Maybe the relay is faulty.

@Peter, I think the dizzy/ignitor is OK. It's the 'newest' component on the car.

[66yostagea]

Thanks Andrew,

I'll unclip the cold start injector and test your theory. Is it likely that all the injectors would gum up? Maybe the relay is faulty.

@Peter, I think the dizzy/ignitor is OK. It's the 'newest' component on the car.

[/quote

I have just been thru this.

Get some throttle body cleaner. Clean the AFM and the throttle body. Worked for me. 100%

[hcg210]

sounds like a relay, or the cold start valve...remove them and try another one if you have spares...

or distributor module??

cheers

Mario.

[jrh001]

...

I have just been thru this.

Get some throttle body cleaner. Clean the AFM and the throttle body. Worked for me. 100%

That did the trick (plus a new fuel filter). Back on the road.

Thanks for all the replies.

JH

[Socrates]

Aren't the AFM's on these vane/flap types?

sorry for questions but how could cleaning the flap fix it?

[jrh001]

Hi Socrates,

I suspect the fuel filter was the main problem. The throttle body was very dirty so cleaning that must have helped. As for the AFM, it was reasonably clean but I also cleaned up the electrical plug and connectors.

The problem with EFI is that a fault in any one of the sensors, relays, connectors (or an air leak!) can cause problems or stop the engine from running. I collected a set of relays off a wreck today - just in case (!). I probably need more testing tools, a fuel pressure gauge would be useful - for a while I thought that the fuel pump wasn't delivering enough fuel.

JH

[Socrates]

thanks for reply.

[Factory 5]

I can confirm that there has been alot of problems with fuel since the floods in qld. I know of at least 6 cars now that have crapped themselves due to fuel. Tank clean and new filter, and purged lines have fixed them all.! (including my R30 Hatch which is in Brissy at the moment)