Chimaera cutting out

[Max Goucher]

My 5.o HC M reg has an unfortunate habit of complete cut out sometimes after a good burn ond othertimes in traffic.

Apart from being very frustrating its dangerous and I dont fancy this on the way to Le Mans.

Several kind people have made suggestions; coil,coil amplifier, ECU, plug leads, loose earth.

Does anyone have any suggestions before I have to spend a fortune on the brute?

[Big Al.]

ERR! Have you cleaned the "Stepper Motor"?


>> Edited by Big Al. (moderator) on Friday 28th March 10:02

[incorrigible]

Stepper motor I reckon too

[GreenV8S]

Does it restart immediately?

[Max Goucher]

It starts within a few seconds but not immediately.

I sprayed some WD40 on stepper motor and it looks clean. It did tick over high or low and cleaning the stepper seems to have solved it.

The car sometimes misses too and clears itself after a few minutes.

Help!

[magnus]

This old chestnut again! My 5L has done this for years (well--two years). Yes--I clean the stepper motor regularly as per SH's instructions. No difference. Usually happens after a good thrash I agree. I have changed the coil, HT leads,replaced the fuse-box and all relays etc. Due to mods the ECU has been replaced AND yes it still happens. I have taken it to the dealers who tell me that they would have to wire it up and run it until the fault occurs. But then of course likely as not it won't happen because the thing is spasmodic. The only common factor is that it only happens when the engine is hot and when I have given it a bit of welly then eased off. Has anybody actually traced this fault?

[caro]

My 450 had a phase of cutting out when warm - always as the car was slowing down, for junctions etc. Cleaning the stepper motor didn't really sort it, but then Dave Porter solved the problem for me with a very simple reset. Don't know if it would cure a 5.0 HC, but if this sounds like it might help you mail me for more.

[RCA]

Hi Max, Glad to see you have joined us on here!!!!, Hope that you solve the problem soon
Cheers
Richard

[matt101]

Hi,

I think I may know what this is!
(check my previous posts fot details)

The very same fault developed on my 98S Chimaera a few months back. Tried everything to get rid of the problem with no luck. The only thing left was the alarm and as the fault appeared to be as if the cars immobilizer was arming without warning, I changed it for a Clifford system. Since then I have had no problems.

In my case the car would just cut out and would not even try to turn for up to 10 mins despite arming and dis arming the alarm. Maybe this was temperature related too.

Could this be a dodgy relay somewhere in the immobilizer circuit?

Good luck !!


Matt.

[hut49]

Max,

Just a long shot but could the fuel tank vent be blocked/partially blocked causing a vacuum to form into the tank, until the fuel pump can no longer suck and blow fuel towards the front end? If it's not a complete block, or there's a slight flow of air into the tank, after some time the vacuum will ease and flow will resume. There was a thread on the carbon canister, through which the fuel tank vents, last week. Worth checking when it stops next time if there's a big sunction on the fuel filler cap. Every heard your tank make a clang as the structure deforms under a vacuum?

Nothing worse than driving when you're waiting for an intermittent fault to arrive. Hope you get to the bottom of this.

Hutch