tach troubles

booeman · 08-30-2007

I just put a tach from a 74 sport wagon in my 71 sport coupe (manta) and when I power up the ignition switch with out engaging the starter the tach jumps up to 3500 - 4000 RPM's. it's wired according to the manual except I don't have an oil gauge. (red/black from the tach posi to the posi on the oil gauge.) I don't know if it matters, I have a hot spark electronic ignition that uses the negative side of the coil with the tach. anyone seen this before?

tomking · 08-30-2007

Search this thread as it sounds eerily similar to my problem, now corrected.

tekenaar · 08-30-2007

Red/black wire is just sw12V (comes on with the ignition key) . . .

08-30-2007	#1 (permalink)
booeman Member Join Date: Jul 2006 Location: lynnwood. Wa. Posts: 132	Unanswered: tach troubles I just put a tach from a 74 sport wagon in my 71 sport coupe (manta) and when I power up the ignition switch with out engaging the starter the tach jumps up to 3500 - 4000 RPM's. it's wired according to the manual except I don't have an oil gauge. (red/black from the tach posi to the posi on the oil gauge.) I don't know if it matters, I have a hot spark electronic ignition that uses the negative side of the coil with the tach. anyone seen this before? Last edited by tekenaar; 08-30-2007 at 10:31 AM.

08-30-2007	#2 (permalink)
tomking tomking Join Date: Aug 2002 Location: SW Missouri Posts: 1,287	Search this thread as it sounds eerily similar to my problem, now corrected. __________________ TMK Last edited by tekenaar; 08-30-2007 at 10:40 AM. Reason: direct link

08-30-2007	#3 (permalink)
tekenaar Cunning Linguist Join Date: Mar 2002 Location: Plano, TX 75074 Posts: 4,441 Real Name: Otto Provided Answers: 13	Red/black wire is sw12V Red/black wire is just sw12V (comes on with the ignition key) . . . __________________ 1960: ♥ '61 Rekord PII 1.7 3S 3.9 ♥ '69 Kadett LS 'sprint' 1.9 3A 3.18 1970: ♥ '70 GT 1.9 4S 3.44 ♥ '72 GT 2.2SSD 5S 3.44 ♥ '72 GT 2.4FI 5S 3.44P ♥ '73 GT 1.9FI 4S 3.44 ♥ '75 1900 1.9FI 4S 3.44 1980: ♥ '85 Bitter SC 3.9FI 5S 3.44P 2000: ♥ '09 Solstice GXP Coupe 2.0 SIDI VVT Turbo 5S 3.73P

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)