MSD Cap and Rotor

[Speedrcr]

Just ordered up one of the Ebay caps for my kids car... will the stock rotor work with the MSD caps?

[96z28SideSwype]

Yeah the stock rotor should work just fine what we recommend doing if it hasn't been done yet is to just lock tight the screws to make sure they don't come loose

[BALLSS]

the stock rotor will work....but both the cap & rotor are wear items. I really would not put a new cap on with a old rotor as the rotor tip is worn. It will still work but more like replacing just 1/2 of your spark plugs

[Speedrcr]

Thanks for the info - I am going to get another rotor when I change the cap, just wanted to make sure the stock replacement could be used or if I had to go get an MSD rotor.

[BALLSS]

the MSD rotor is better IMHO

[Injuneer]

Oh wow ok I'll mention that to one of the guys that I'm cool with see what he says and see what optic sensor we use. What sensor do you think works the best it was the Mitsubishi one right?

@96z28SideSwype

I couldn't find Tubby's data log, but this week I received another one showing totally erratic RPM signals, and the same result.... idle speed goes up when the RPM signal spikes unrealistically, causing the PCM to increase the IAC counts. The PCM also advances ignition timing in response to the high RPM spike. In this case it's even more severe - the spikes (in a fraction of a second) are as high as 7,000 RPM, even though there is no indication that the engine is actually anywhere near that RPM (just from looking at MAP and MAF values).

As far as I know, the RPM is taken from the Opti pulse signals. I realize that there could remotely be a problem with a high voltage wire being too close to the Otpi/harness setup, and I will ask the owner of the car if he has checked that.

I am prepared to provide you with the Excel file of the data log so you can have the tech guys at MSD look at it, if possible. Let me know.

Thanks!

[96z28SideSwype]

@96z28SideSwype

I couldn't find Tubby's data log, but this week I received another one showing totally erratic RPM signals, and the same result.... idle speed goes up when the RPM signal spikes unrealistically, causing the PCM to increase the IAC counts. The PCM also advances ignition timing in response to the high RPM spike. In this case it's even more severe - the spikes (in a fraction of a second) are as high as 7,000 RPM, even though there is no indication that the engine is actually anywhere near that RPM (just from looking at MAP and MAF values).

As far as I know, the RPM is taken from the Opti pulse signals. I realize that there could remotely be a problem with a high voltage wire being too close to the Otpi/harness setup, and I will ask the owner of the car if he has checked that.

I am prepared to provide you with the Excel file of the data log so you can have the tech guys at MSD look at it, if possible. Let me know.

Thanks!

If you want to go ahead and email it to me email msdforms@msdperformance.com I get that email then Ill get with one of the engineers to see if he wants to take a look at it.

[96z28SideSwype]

@Injuneer Have you been able to email the file?

[Injuneer]

Probably email it to you at MSD tomorrow (Wednesday). It will be sent from my FWForsythePE account. Topic - Scan9495 Data Log.

[Injuneer]

File sent at 4:18 PM, EST.

Fred