Chimaera 500 help needed

[mjastorff]

Dear forum,

Chimaera 500, year 95, Serp. Engine

The following symptoms: At cold start after 14 days of standing, not all cylinders run smoothly, but this normalises after a few throttle strokes. Not unusual according to Mr Pohlmann from ACS Germany.

Then, however, after approx. 45 minutes of completely trouble-free driving, sudden loss of power, uneven running on not all cylinders, slight smell of unburnt petrol, jerky throttle response. After approx. 1 minute the phenomenon is gone again and it runs as if nothing had happened!

Replaced so far: distributor cap and finger, ignition cables, plugs, plug extensions and stepper motor.

I know that remote diagnoses are always tricky, but perhaps someone has already experienced a similar phenomenon and has a solution.

Perhaps the concentrated forum knowledge will help.

Best regards from Hamburg
Martin

[Belle427]

Where did you get the ignition system parts from?
A lot of the stuff you have to be careful with as its not great quality wise, most people remove the extenders as they are a source of many a problem.
The ignition system on these cars is the cause of a lot of problems so you have to be sure its 100% before moving on.

[blitzracing]

Keep an eye on the tacho as it plays up. If it's erratic or dropping to zero the ignition amp is failing.

[WOO5IE]

Try running without the plug extenders.Even new ones can be problematic.
I run without them as I had similar issues . I use heat sleeves for heat protection

[737 FLF]

Ignition Amplifier

[mjastorff]

Thanks so far for the help.

I´ll take out the extensions first and if that doesn´t help change the ignition amp.

Will keep you updated.

Cheers
Martin

[mjlloyd500]

Just had heat socks on my griff after 19 years off extenders omg what a difference runs beautifully and much cooler