Racepak Sportsman Help

Markeracer · 04-08-2023, 10:50 PM

The RPM plot line is full of static and looks like a jagged piece of broken glass instead of a smooth line. And the RPM readings are crazy as well. The car Runs just fine. Driveshaft and accelerometer data plots are just fine. This is an intermittent problem with the RPM.

SSDA Hemi · 04-09-2023, 07:03 AM

RPM is read off the tach wire to the ignition box. Check the connection, shouldn't be a butt connector but soldered and terminal into ignition box. Do you have a tach connected also or reading rpm through intelligauge or RP dash? Could be a conflict with tach also, but much less likely. I would check wire for damage and faulty connection

Dave Noll · 04-12-2023, 04:32 PM

Had a similar problem with mine & I called Holley. The 1st thing they said was RF interference. Put new plug wires on and got a filter (MSD8830) that goes on the coil power wire, fixed.

Sean Marconette · 04-12-2023, 08:24 PM

Quote:

Originally Posted by Dave Noll

Had a similar problem with mine & I called Holley. The 1st thing they said was RF interference. Put new plug wires on and got a filter (MSD8830) that goes on the coil power wire, fixed.

I had the same problem with my Computech DataMaxx data logger and that's what fixed my problem.

Sean

Dirk Olson · 04-13-2023, 12:51 PM

Sounds like a noise issue. Check how and where the wiring is routed. Stay away from any wires that run fuel pump, water pump, fan, etc. also recheck all your grounds.

04-08-2023, 10:50 PM	#1
Markeracer Junior Member Join Date: Jul 2018 Location: Joliet, IL Posts: 76 Likes: 10 Liked 67 Times in 28 Posts	Racepak Sportsman Help The RPM plot line is full of static and looks like a jagged piece of broken glass instead of a smooth line. And the RPM readings are crazy as well. The car Runs just fine. Driveshaft and accelerometer data plots are just fine. This is an intermittent problem with the RPM.

04-09-2023, 07:03 AM	#2
SSDA Hemi Senior Member Join Date: Nov 2005 Location: NJ Posts: 503 Likes: 130 Liked 451 Times in 77 Posts	Re: Racepak Sportsman Help RPM is read off the tach wire to the ignition box. Check the connection, shouldn't be a butt connector but soldered and terminal into ignition box. Do you have a tach connected also or reading rpm through intelligauge or RP dash? Could be a conflict with tach also, but much less likely. I would check wire for damage and faulty connection

04-12-2023, 04:32 PM	#3
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 710 Likes: 2,671 Liked 240 Times in 112 Posts	Re: Racepak Sportsman Help Had a similar problem with mine & I called Holley. The 1st thing they said was RF interference. Put new plug wires on and got a filter (MSD8830) that goes on the coil power wire, fixed. __________________ Dave Noll, EF/S ,?/SA 6526

04-13-2023, 12:51 PM	#5
Dirk Olson Member Join Date: Mar 2003 Posts: 199 Likes: 50 Liked 172 Times in 46 Posts	Re: Racepak Sportsman Help Sounds like a noise issue. Check how and where the wiring is routed. Stay away from any wires that run fuel pump, water pump, fan, etc. also recheck all your grounds. __________________ Dirk Olson 5036 STK Last edited by Dirk Olson; 04-13-2023 at 12:51 PM. Reason: spelling