constant stream of sparks

[pud]

HI , i hope i havnt confused all the great mechanics out there on my last posts , the issue is when i turn on the ignition and look at a plug ive taken out but still connected to the ht lead and earthed on the engine to check for a spark i have a constant stream of sparks which are not timed would anybody know whats causing this , i hope ive made this a bit clearer, thanks , pud, i forgot to say this all happens when the engine is not turning over,

[Jerome74911S]

Your continuous sparks are a mystery to me, sorry. However, to make your case clearer to those who might be able to answer, I have a suggestion. Your query was one long rambling sentence. Proof read your post and adjust your punctuation for clarity; this might help.

[kanadary]

not sure if its this but when i had a 240z in the 80s i had an issue with the dist cap having a hair line cracks and carbon filled the cap.. i was getting intermittent spark when it wasn't suppose to get spark. replaced the cap.. back to normal.

[wwest]

Originally Posted by pud

HI , i hope i havnt confused all the great mechanics out there on my last posts , the issue is when i turn on the ignition and look at a plug ive taken out but still connected to the ht lead and earthed on the engine to check for a spark i have a constant stream of sparks which are not timed would anybody know whats causing this , i hope ive made this a bit clearer, thanks , pud, i forgot to say this all happens when the engine is not turning over,

Either the SCR in your CDI ignition is failing due to high voltage breakdown, voltage risetime or else the CDI's DC-DC upconverter, 12 volts to ~300 volts, is getting too much input voltage, above ~15 volts.

[James Brown]

There might be a break down of the Green Wire, check that (the wire coming out of the distributor going into the CDI box. This is a new one for me!! That is if you have one, I don't see what type of 911 you have..

[wwest]

Originally Posted by pud

HI , i hope i havnt confused all the great mechanics out there on my last posts , the issue is when i turn on the ignition and look at a plug ive taken out but still connected to the ht lead and earthed on the engine to check for a spark i have a constant stream of sparks which are not timed would anybody know whats causing this , i hope ive made this a bit clearer, thanks , pud, i forgot to say this all happens when the engine is not turning over,

Have you recently noticed the tach jumping, jerking upward intermittently...?

That is a symptom of a failing CDI, Capacitive Discharge Ignition, module.

And the CDI failure often results from alternator/regulator failure wherin the 12 volt battery is continuously overcharged...prevalent sulpher or sewer odor.

[Bob Kontak]

I am struggling with how electricity can get to a spark plug if the rotor in the distributor is not pointed to that specific plug. Are you connecting the removed spark plug to its own plug wire or to the secondary coil wire (the fat one) that leads to the center of the distributor cap?

If you engine is not turning over and if your distributor is not carbon-ed up like Kanadary mentions there is no way that plug can fire connected to it's own plug wire - even if the coil is sending weird jolts of electricity to the distributor. This is not making sense

Not doubting you, just challenging you. Take another plug wire off and hook it to the plug you removed. Is it still firing? Remove the coil wire and perform the same test with the plug wires. Isolate where the electricity is coming from.

[James Brown]

I'm calling horse pucky on this

[ischmitz]

I am only guessing here since I have not seen the post prior to the edit. I assume you have Bosch CDI box. If you get a constant stream of sparks the box is bad and needs repair.

Ingo

[Walt Fricke]

PUD's biggest communication problem is that he doesn't say what 911 he has. Until he does, no one can give particularly useful advice.

[ossiblue]

Originally Posted by Walt Fricke

PUD's biggest communication problem is that he doesn't say what 911 he has. Until he does, no one can give particularly useful advice.

Good point! I did a little checking and apparently he has a 1972 targa with a 2.4 engine which, I assume, is in stock configuration.

[Bob Kontak]

Agree - I had to dig into his older posts to find what he had.

I have a feeling he connected the plug that he took out to the coil-to-distributor wire and sparking occurred then.

There is a language barrier but he needs to continue to give feedback for additional support.

[pud]

HI all you pelicans the car which im working on is a porsche targa 1972 2.4 T with MFI , thanks , pud