Aftermarket Tach in 93 Camaro, having problems...
#1
Aftermarket Tach in 93 Camaro, having problems...
Okay, guys, I'm completely replacing my OE gauge cluster with Nordskog digital aftermarket gauges. I've worked out most the wiring kinks (like soldering a 470-ohm resistor between the alternator wire and a switched ignition source to help the charging system run properly), but I'm left with this ONE problem with my tachometer. Any ideas?? I wired everything up as per instructions, and it works fine and is accurate...until about 4000 RPM and higher. It will just drop, to like 2600 RPM. Engine runs fine, just the display is off on the tach, and only after 4000 RPMs. I KNOW it can't be a bad ground, because I ran a 10g ground wire exclusively from the chassis to my gauges. Also, just FYI, it's a universtal tachometer, and I have wired it as per instructions for installing it on a V8 engine. Any other ideas?
Oh, and just so you guys know, I'm running a Delteq ignition system on my 1993 Camaro (and I've removed the tach filter, found exclusively in the 93 F-bodies- this was necessary for the OE tach to read accurately after the ignition conversion)...any ideas at this point would be much appreciated!!
Oh, and just so you guys know, I'm running a Delteq ignition system on my 1993 Camaro (and I've removed the tach filter, found exclusively in the 93 F-bodies- this was necessary for the OE tach to read accurately after the ignition conversion)...any ideas at this point would be much appreciated!!
#2
I believe on the 93 cars the tach signal was run off of the coil. To do this they needed to add a tach filter, so the factory tach would work. Most aftermarket tachs will not work with the tach filter. I believe you need to take it out of the factory wiring, but im not sure where its at.
#4
Read the second paragraph of my first post again. I removed the tach filter loooooong ago, back when I installed the Delteq ignition system. The only solutions I can see here are possibly an MSD DIS tach adapter (p/n# MSD-8913), or I have to get my tach signal from another wire, possibly directly from the ECM or the Delteq wiring harness...
Trending Topics
#9
TECH Resident
iTrader: (10)
Joined: Sep 2003
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
From: Fernandina Beach, Florida
i would call them and see if they have an answer... cuz if its working period... it has nothing to do with the tach filter... cuz when i had on hooked up to the factory tach wire with the filter in... it went nuts all the time... then i just realized that i could run it from my MSD box... all was good...