question tacho d-180[ch8207], spike

aeromarmi

New Member
Joined
Aug 4, 2008
Messages
1
hi i have the Jabiru 3300 single phase and the D-180, I conected one of the 2 alternator cable trough a 1 amp fuse, to the Left input of the tacho (PIN 32, db37), and its looks to be working fine, but, when I put the throttle between 2200 rpms it rise to 4200 (and of course the engine is working around 2250, 2300), and if I continue with the throttle it drops again to the correct value 2350, it just in that gap rise of rpms, i configured 6 ppr
What do you recomend to correct this?
 

dynonsupport

Dynon Technical Support
Staff member
Joined
Mar 23, 2005
Messages
13,226
Try adding some resistance inline on that wire, similar to how we instruct for the p-lead hookups. Start with 10K.
 
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