stock tach problem

Pearl GT40 306 · 08-20-2002, 04:39 AM

one day when i started my car the tach would not go below 2500 rpm's and as motor rpm started moving it was a thousand too high. It went away that night for 30 minutes. then came back. Ive been rockin it like that for about 2 months but im finally sick of it. could someone diagnose this. i think its a bad ground.

PKRWUD · 08-20-2002, 05:04 AM

year/model?

Hozer 88GTConv · 08-20-2002, 08:32 PM

I know this isn't what you probably want to hear, but one of the best things I ever bought was a Autometer Monster Tach. Stock tachs are worthless after 3-4 grand. Mine is off more than a grand at 5k actual RPM. (indicates 6k + on the stock)...
I never knew how bad I was missing my shift point.

Pearl GT40 306 · 08-22-2002, 01:59 PM

my car is a 92 gt. i figured id have to get a new tach. oh well

08-20-2002, 04:39 AM	#1
Pearl GT40 306 Registered Member Join Date: May 2002 Location: Lindenhurst NY Posts: 16	stock tach problem one day when i started my car the tach would not go below 2500 rpm's and as motor rpm started moving it was a thousand too high. It went away that night for 30 minutes. then came back. Ive been rockin it like that for about 2 months but im finally sick of it. could someone diagnose this. i think its a bad ground. __________________ 1992 Gt. 306 short block w/ forged TRW pistons, gt-40 irons, gt-40 upper and lower, B303 and 1.6's, Mac cold Air, March ram air, 70mm throttle body, 77mm mass air, kenny brown subframes, 4.10's(now 2.73's), world class t-5 w/ pro 5.0, bbk long tubes, flowmaster 40 series, 2.5" pipe with 3.5" tips cut through valence tastefully, no cats. 9.5:1

08-20-2002, 05:04 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	year/model? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

08-20-2002, 08:32 PM	#3
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Stock tachs blow... I know this isn't what you probably want to hear, but one of the best things I ever bought was a Autometer Monster Tach. Stock tachs are worthless after 3-4 grand. Mine is off more than a grand at 5k actual RPM. (indicates 6k + on the stock)... I never knew how bad I was missing my shift point. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

08-22-2002, 01:59 PM	#4
Pearl GT40 306 Registered Member Join Date: May 2002 Location: Lindenhurst NY Posts: 16	tach my car is a 92 gt. i figured id have to get a new tach. oh well __________________ 1992 Gt. 306 short block w/ forged TRW pistons, gt-40 irons, gt-40 upper and lower, B303 and 1.6's, Mac cold Air, March ram air, 70mm throttle body, 77mm mass air, kenny brown subframes, 4.10's(now 2.73's), world class t-5 w/ pro 5.0, bbk long tubes, flowmaster 40 series, 2.5" pipe with 3.5" tips cut through valence tastefully, no cats. 9.5:1

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