It runs fine for a few seconds then dies to nothing. These are just some of the questions I've asked myself when troubleshooting these systems. I'm not sure how this happened, but I suspect someone was trying to adjust something with a screwdriver. We also know that each rotor has two spark plugs: a leading plug and a trailing plug. Everything seemed to be okay.
The above information becomes important when we start to examine the relationships between ignition signals. Trailing primary 1 fires when the Select signal goes from 0 to 5 volts, while trailing primary 2 fires when the Select signal goes from 5 to 0 volts. Focus on the Select signal. The igniters will not toggle the primary without this signal. The eccentric shaft crank marks are first lined up, and a mark on the crank angle sensor driven gear is aligned to the crank angle sensor housing.
Both trailing primaries have the same pattern. Ne frequency is approximately 12 times as fast as G. Therefore, and this is important, in one eccentric shaft crank revolution, an ignition event occurs every 180 crank degrees. This is a very good way to evaluate the leading igniter's performance. A few paragraphs ago, I briefly mentioned the Select signal used by the trailing igniter. The best place to start this discussion is with a review of rotary engine principles.
The eccentric shaft has two offset eccentrics one for each rotor mounted 180 degrees apart. The firing order is set by the computer by the crank sensor. Like a conventional distributor, the crank angle sensor turns at half crank speed. I do not make any money of this website, so if you have a few extra dollars lying around and would like to give me a hand, I would be ecstatic if you clicked the donate button to your left. This shaft allows the rotors to move in the shape of an epitrochoidal curve.
When the seal is seen, mark the crank. The leading primaries look normal. About 1 msec into the spark line, extreme turbulence seems to occur, lasting for about 0. ? Well, I hope I've shed some light on these very interesting ignition systems. Where do I go from here? Thanks, Ron Anthony Ok here is the deal there is two coils the leading and trailing.
This allows the rotors to follow the shape of an epitrochoidal curve. Also, if I try to re-start it again, it always starts again. It used to be that much of our diagnostic time was spent re-learning the engine's support systems such as fuel, emissions and especially the ignition system. Properly installing a crank angle sensor is pretty straightforward. Something doesn't look right, does it? For every IgT pulse sent to the leading igniter, the coil will fire. Let's summarize with some key pieces of information.
Here's where things get interesting. The leading coils have two wires to the primary side and the trailing has 7 wires to the primary side. Said another way, there are three power events, or pulses, in one rotor revolution. And also which wire goes to which plug? I had to replace the spark plug wires because three of the four wires were broken off at the spark plugs, so I couldn't really see which wires went to which plugs. Figure 10 compares the primary of trailing coil 2 to the 0-5 volt Select signal.
Figure 3 does a nice job of showing the relationship of the two rotors and how they go though the four combustion events. Take a close look at that primary pattern in Figure 11. Even if I try right away. You can disable the trailing ignition system and the engine will start and run. When the inspection plate was removed on this crank angle sensor, I discovered one chipped tooth on G and two chipped and slightly bent teeth on Ne. But it still only runs for a few seconds.
It must be something in the engine, but what? All I can say is that it starts every time no matter how soon I try a re-start. The purpose of the trailing spark plug is to continue the burn for more complete combustion and reduced emissions. It fired and ran for approximately 5 seconds. That is the purpose of the Select signal. There is only one IgT signal for two coils. Also, Since I last communicated with you, I installed new plugs according to the Haynes manual for this car. On average, we may see three to five of these vehicles a year for driveability concerns.