Arc00TA

iTrader: (17)

Are they really THIS bad? I was out logging some timing changes today, and I noticed my tach is even more off than it was some time ago. It used to be about 100-200rpm off, especially at idle, but nothing too major. Today I noticed it was 400-600 and sometimes even 1000rpm off. Is this a PCM issue, or should I look into finding a new gauge cluster? I don't particularly want an aftermarket tach in the car. I don't remember my 99 being that way, except it was slightly off at 6000+rpm, is this more of a 98 thing?

madmike9396

iTrader: (29)

my 01 is about 500 off when me and a friend was checking my tune

Arc00TA

iTrader: (17)

Is it consistently off? Mine varies wildly. I was cruising at what the tach said was 3200 and it definitely didn't sound like it, hptuners was telling me 2100. I was wondering why I kept lugging the car in 6th when it was showing 2500+ rpm.

RPM WS6

iTrader: (3)

Not a '98 thing. Mine is only off about 100rpm under all conditions.

All 4 of my LS1 cars have been off by about 100rpm on average. Same for all years.

Only gage that's different for the '98s is the temp gage.

Striker

iTrader: (1)

I also noticed that the tach in my WS6 is slow responding. :S kinda sucks. I get in a buddies C5Z06 rev it in neutral and the tach just shoots across.

Arc00TA

iTrader: (17)

I'm thinking I might need a new cluster, its not just slow to respond, but at cruising rpm over long periods it remains at least 400rpm off (under 3k) and 600+ off (over 3k).