Strange problem on my 5.0

[RolleK]

Hello.

I hope that someone can help me with this big problem.

I can drive the car for a long time, change gears and everything but when i´m going down to idle it stops.
It seams like the car dont get any gas.

After this I cant start it up.
I hear that the fuelpump is working and its a new gasfilter.

We managed to start it with spraying startgas in the, but as soon as we stopped spraying it stopped again.

One time I tried to disconnect the ECU and then it started!!
But after that and a short drive it stopped again.

Regards
Roland

[Julesprivate]

Test/replace the fuel pump relay (always a good starting point) - I know you said you can hear it prime but when mine was failing it "overheated" and stopped working when hot..

And by HOT I mean it melted the plastic case and was too hot to hold...

Corroded/worn connections inside the relay were the cause in my case.

It could also be the immobiler relay (similar reasons) and/or the fuel pump itself getting hot..

[chris1972]

Does it work after you have disconnected and reconnected the ECU? Possibly a fuelling or ignition issue. Are you getting a spark at the plugs when you turn it over?

[Andy JB]

Julesprivate said:

Test/replace the fuel pump relay (always a good starting point) - I know you said you can hear it prime but when mine was failing it "overheated" and stopped working when hot..And by HOT I mean it melted the plastic case and was too hot to hold...

This is what gets me about TVR - how can this arrangement go so wrong - this is also what causes fires. Essentially the fuel pump (fitted to many other brands) is attached by an electrical wire to a relay (also fitted to other applications) presumably both tested and up to the job - so how in a TVR does it get so hot, melt and catch fire?

[Andy JB]

Julesprivate said:

Test/replace the fuel pump relay (always a good starting point) - I know you said you can hear it prime but when mine was failing it "overheated" and stopped working when hot..And by HOT I mean it melted the plastic case and was too hot to hold...

This is what gets me about TVR - how can this arrangement go so wrong - this is also what causes fires. Essentially the fuel pump (fitted to many other brands) is attached by an electrical wire to a relay (also fitted to other applications) presumably both tested and up to the job - so how in a TVR does it get so hot, melt and catch fire?

[FlipFlopGriff]

Check for a spark and check you've got fuel supply. After that its electrical.
I've just cured an ongoing stalling issue which was the engine earth strap, but could be a million and one things. Does it run well through the rev or misfire/hit a limiter?
FFG

[QBee]

My stalling was a stepper motor that was failing when hot

[EGB]

QBee said:

My stalling was a stepper motor that was failing when hot

A bag of frozen peas (Birds Eye)on stepper and or coil may help to cool on hot stationary idle. Strewth what next!! Have yet to try it. The Bible mentions it.

[spend]

Pull a plug out when it won't start & figure out whether its wet or not. Easy start seems to assist with flooding which has caught me out a few times suggesting fuel when its actually ignition.

Typically I'd be looking at big air leaks or ignition (failing amp does these intermittent glitches & then quickly deteriorates to dead). I'd ignore the fuel pump suggestions as the car will normally start & run for @30sec with just the residual pressure in the fuel rail (no fuel pump / prime at all).