Joep
Member
Gentlemen,
I am looking to tap your brains in determining and solving a problem which I have encountered. My 3.0CSi from 75 (VIN 4340789), was running ok on a contact breaker distributor with a ballast resistor wire. I decided it was time to upgrade to electronic ignition so I ordered a pertronix kit. This was installed in the distributor and yesterday I installed it in the car. It is a D-jetronic.
The effect was that now my car was running awful and very rough, like it was not running on all cylinders. After some checking, I decided to swap back to the regular distributor which was in the car before, but the same problem occurred, no change.
The way I hooked up the pertronix was as per instructions. I connected the redwire to the + side which gets the reduced voltage from the ballast resistor wire (aro. 8,2 V). I also installed an 1,5Ohm internally resisted Pertronix 40011 coil. I also made a bypass there where the resistance wire starts in the harnes and pulled a wire from there to get the 12V. By the way, the split is in the wiring near to the left front head lamp just befoe the radiator.
Both with the reduced voltage and the regular 12V the same problem occurred. Now I have been checking a couple of things and found the following:
The engine will start but run very rough and idle around 300-400 rpm. Pulling some of the spark plug wires learned me that Cylinders 1, 3 and 5 are not working. Definitely the car is running on 3 cylinders (almost an achievement in itself one might say). Now I checked that all the spark plugs are firing and they do. This leads me to believe that the cylinders 1,3 and 5 are not getting any fuel. Holding my hand to their injectors I do not feel a pulse. This led me to the trigger contacts in the distributor.
Now I had put in a new set of trigger contacts in the pertronix distributor, so I checked it for proper working and they do. (remove distributor and turn and look for the switch from continuity to infinite resistance). I also checked the wires from the trigger to the ECU: all have continuity. The grounding of the injectors is also ok.
So now, I am puzzled to what has happened. Why are these cylinders not getting a pulse. Did I fry something with the the Pertronix. I am thinking that something has shorted somewhere. Strangely enough, when I have the coil hooked up to the reduced voltage from the resistor wire, the fuel pump cranks up when turning the ignition( the relay near the ECU clicks). When applying the higher (by pass) voltage to the coil, that does not happen although it does some times. (?). It does run a bit better with the high voltage (12V) connected (like some 100 rpm extra compared with low voltage 8.2V)
I checked all the fuses in the fuse box below dashboard driver side and all are in working order.
Does anybody have any insight to why only half of my cilinders are getting a pulse. Is there a fuse which I do not know about, have wires somewhere else melted. By the way this is what Pertronix support informed me:
If you are running the Ignitor on a four or six cylinder application we would recommend a 3.0 ohm coil with a 12 volt system. If you have an eight cylinder application then you can use a 1.5 ohm coil. In both cases you can completely remove the external ballast resistor.
Now this leads me to believe that I need a 3ohm coil but I still can not explain why this would have the effect on the fuel supply. Help!! I am out of options to check.
Many thanks in advance for your input.
Joep
BTW the MPS is good, just reconditioned by Koller.
I am looking to tap your brains in determining and solving a problem which I have encountered. My 3.0CSi from 75 (VIN 4340789), was running ok on a contact breaker distributor with a ballast resistor wire. I decided it was time to upgrade to electronic ignition so I ordered a pertronix kit. This was installed in the distributor and yesterday I installed it in the car. It is a D-jetronic.
The effect was that now my car was running awful and very rough, like it was not running on all cylinders. After some checking, I decided to swap back to the regular distributor which was in the car before, but the same problem occurred, no change.
The way I hooked up the pertronix was as per instructions. I connected the redwire to the + side which gets the reduced voltage from the ballast resistor wire (aro. 8,2 V). I also installed an 1,5Ohm internally resisted Pertronix 40011 coil. I also made a bypass there where the resistance wire starts in the harnes and pulled a wire from there to get the 12V. By the way, the split is in the wiring near to the left front head lamp just befoe the radiator.
Both with the reduced voltage and the regular 12V the same problem occurred. Now I have been checking a couple of things and found the following:
The engine will start but run very rough and idle around 300-400 rpm. Pulling some of the spark plug wires learned me that Cylinders 1, 3 and 5 are not working. Definitely the car is running on 3 cylinders (almost an achievement in itself one might say). Now I checked that all the spark plugs are firing and they do. This leads me to believe that the cylinders 1,3 and 5 are not getting any fuel. Holding my hand to their injectors I do not feel a pulse. This led me to the trigger contacts in the distributor.
Now I had put in a new set of trigger contacts in the pertronix distributor, so I checked it for proper working and they do. (remove distributor and turn and look for the switch from continuity to infinite resistance). I also checked the wires from the trigger to the ECU: all have continuity. The grounding of the injectors is also ok.
So now, I am puzzled to what has happened. Why are these cylinders not getting a pulse. Did I fry something with the the Pertronix. I am thinking that something has shorted somewhere. Strangely enough, when I have the coil hooked up to the reduced voltage from the resistor wire, the fuel pump cranks up when turning the ignition( the relay near the ECU clicks). When applying the higher (by pass) voltage to the coil, that does not happen although it does some times. (?). It does run a bit better with the high voltage (12V) connected (like some 100 rpm extra compared with low voltage 8.2V)
I checked all the fuses in the fuse box below dashboard driver side and all are in working order.
Does anybody have any insight to why only half of my cilinders are getting a pulse. Is there a fuse which I do not know about, have wires somewhere else melted. By the way this is what Pertronix support informed me:
If you are running the Ignitor on a four or six cylinder application we would recommend a 3.0 ohm coil with a 12 volt system. If you have an eight cylinder application then you can use a 1.5 ohm coil. In both cases you can completely remove the external ballast resistor.
Now this leads me to believe that I need a 3ohm coil but I still can not explain why this would have the effect on the fuel supply. Help!! I am out of options to check.
Many thanks in advance for your input.
Joep
BTW the MPS is good, just reconditioned by Koller.
