Not sure why the car does this.

Argeo · 08-02-2004, 05:06 AM

The car turns over but won't start in the afternoon or evening sometimes. It could be sitting for 24hrs and not start. In the morning, it always starts.

Is this the Porsche gods telling me to abort the mission of having a nice car someday?

Thanks,

David

Argeo · 08-02-2004, 05:07 AM

Oh, it is electrical. It is getting gas.

Groesbeck Hurricane · 08-02-2004, 05:10 AM

Strange. What year, motor, and what type of ignition box, wires, and plugs are you using?

Argeo · 08-02-2004, 05:17 AM

Sorry, 77 911 Carrera 3.0. It uses Permatune. Guy at PT told me they either die completely or work, no middle. I just bought new wires, there not the braided one but the all rubber (like $100). I am thinking the wire between the coil and distributor is bad. If I have the car running and I shake that area a little, the engne will sometimes die. Though when the car wouldn't start last night I shook and shook to no prevail, left alone and it started in the morning. Maybe the shake fixed it but the engine is getting flooded from my repeated attempts to start.

I am baffled.

David

Groesbeck Hurricane · 08-02-2004, 09:10 AM

When I replaced my PermaTune I was having the same issues. As I understand it, the PT units work until they start acting up. It might be heat releated. There are two type of boxes, one is silver and one is blue. The blue one I have read referred to as a good unit. The silver one seems to be scrapable. My unit burned up a good Bosch Blue Coil before I went to the MSD. I would look into swapping in a good Bosch and a new coil and seeing if that corrects your issues.

Is there anyone near you who could swap units into your car and test your unit on their vehicle? This is much more accurate than the bench testing. My PT bench tested just fine. Got rid of it and all my ignition problems vanished.

I do not use braided wires and but I do use copper plugs. She just seems to run better that way.

Ryce Stallings · 08-02-2004, 04:41 PM

I agree! Permatune are always doing this. They get hot and quit, They cool and run. Get a Bosch and you will even feel the difference when you put your foot into it. I've had this happen several times on different cars with Permatunes.

Early_S_Man · 08-02-2004, 05:13 PM

David,

I am 100% convinced that the Permatune techs NEVER test customer-returned units at elevated temperatures simulating underhood temps of a 911! I have a silver 3-pin unit they tested for a Pelicanhead and returned it, NTF, No Trouble Found ... as usual! When I tested it strapped to a vibratory shell cleaner and with a couple of heat lamps shining on it ... it failed within 45 minutes, at a case surface temperature of 210°F!

So, my feeling is that the PT folks are patronizing you, just as they do all of their other 911 customers!!! Their tech support people evidently BELIEVE the HYPE on their web site! The concept that a consumer electonic device not built to NASA or military redundant standards ... will never have intermittent failures is PURE SCIENCE FICTION!!!