No Start aftering replacing Dist Cap and Rotor

[no substitute]

Did the car run okay before you changed anything? If yes, then something you did or changed is the culprit. If this is the case, changing plugs and wires are not what's wrong.

[kqw]

There should be some pelicanites in your area that could lend a hand. Are you able to drive the car?

[ausgezeichnet]

The car ran fine before I started changing things. The car is driveable, just a little shaky between 1400 and 2000 RPM.

I tried swapping in my old rotor last night and still had the shaking. I wont' be able to rule out the rotor completely until I get a brand new one next week.

In re-reading Gunter's advice it seems to me I remember seeing a blue spark around the spark plug wire of the #2 cylinder. I also seem to remember hearing an electrical spark when I was moving the wires on that side of the engine. Unfortunately I have not been able to reproduce the spark.

I think I am getting close to "needing" a brand new set of wires which is not necessarily a bad thing

Thanks for all the feedback!

[ruf-porsche]

You have a Motronic system. could also be a partially bad DME

[ausgezeichnet]

Could be the DME. But I've already replace the DME Relay which is what usally goes first. Plus the car was running fine before I started changing the dist cap and rotor.

[ausgezeichnet]

Installed a new rotor and changed all the spark plugs. All the plugs were NKG's gapped to .76mm . Now it runs even worse.

Disconnected spark plug wires one at a time to isolate the cylinders that were not firing and found that all 3 cylinders (#4,5,6) on the right (passenger side) were not firing. I also confirmed by touch. The valve cover on the right side was cold and the valve cover on the left side was warm.

I checked to make sure I was getting spark on the right side by pulling the wire to plug #5 and putting a grounded plug it it. It produced a nice blue spark. As best I can tell, it now does not seemt to be a spark problem (cap, rotor, wires, plugs)

Does any know of a problem that would cause all the cylinders in a bank not to fire? I checked the injector connectors they all seem fine. I checked the fuel supply line to the right side and it looks fine.

I hate making negative progress. Thanks.

[no substitute]

So it will fire a plug out of the motor, but not if the plug is screwed into the sparkplug hole? Are your injectors on the right side spraying?

[Jim Sims]

Seems like you still have the right side wires mixed up. Jim

[ausgezeichnet]

Yes, the plug fires outside the motor so I assume it fires inside the motor. I have checked , rechecked and tripple checked to make sure I have the wires connected corrrecty in the right order.

I just read a little more in my Bentley manual. It has an electrical test for the injectors. Do you think this would be a good next check?

I also noticed pin assignement #15 in the ECM is the injection time signal for cyl 4-6. It looks like you need a pinout test harness to test the ECM so I probally will not be able to test it since a harness is pretty expensive.

[no substitute]

Did you get the direction of rotation correct? 1-6-2-4-3-5 counterclockwise around the cap. One is on top of the clip in plain sight that holds the cap on.
Someone please correct me if the Carreras are different from the SC in this regard.

[ausgezeichnet]

Fortunately I have my old cap that has the same numbers in the same location as the new cap. Starting at the top just to the right of the top clip it is 1-6-2-4-3-5 Clockwise. I double checked my bentley manual and it is correct.

[ga_mueller]

I took it out for spin and all of a sudden the engine died while I was stopped at a street light. All the warning lights came on just like when you turn the key before cranking it over. When I tried to start it again I got the same results as when I had the rotor in backwards

Now THAT'S what my dying ECU did! Try some tapping under the drivers seat next time it happens.

[ruf-porsche]

Check the connector(s) to the injector(s). You may have knock something loose while changing plugs.

[Gunter]

SC distributors are ccw,
Carrera distr. are cw.
Try a new cap along with your new rotor.

[ausgezeichnet]

Hey guys, I just wanted to let you know I found the problem after all this time. The plug wires were not seated properly!!!. It's running like a champ now. Thanks for all your help and suggestions. This forum is great!

[azasadny]

Mike,
I had many problems getting my plug wires to make a good connection on the plugs until I bought a set of Jacobs wires for $129 and they snap on to the plug in a very distinctive way letting you know they are connected!

[ausgezeichnet]

Just ordered a set of Magnecor's. Hopefully they will be better than the Nology wires the PO put on.