tac jumping
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Joined: Jun 2006
Posts: 334
Likes: 0
From: Shangri-La
Car: 87 Iroc
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: stock posi
tac jumping
hey guys, my rpm tach keeps fluctuating up and down, sometimes when at idle it will stay there then pop up very quick, but while driving the tach goes up and down very rapidly.
any help?
any help?
Member
Joined: May 2004
Posts: 295
Likes: 14
From: Gray, TN
Car: 91 Z28, 91 Z28, 92 Z28
Engine: LB9, LB9, L98
Transmission: T5, T5, 700r4
Axle/Gears: 3:42, 3:42, 3:23
I was having a similar problem.
Turned out to be a broken wire at the tach test connector off of the coil.
Its the white wire with a grey connector near the coil.
Turned out to be a broken wire at the tach test connector off of the coil.
Its the white wire with a grey connector near the coil.
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