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#1
06-10-2002, 11:08 AM
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I'm experiencing a backfeed problem on my street/strip 71 GTO. Whenever I use my turn signals the needle on my tach starts jumping (an Autometer 3904 w/ shiftlite). The only change I have made to the electrcal system is installing an H.E.I. distributor. Where do I begin to look?
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1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear 85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book. 87 F350 6.9 4 speed dually A poor man has poor ways. |
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#2
06-10-2002, 11:08 AM
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I'm experiencing a backfeed problem on my street/strip 71 GTO. Whenever I use my turn signals the needle on my tach starts jumping (an Autometer 3904 w/ shiftlite). The only change I have made to the electrcal system is installing an H.E.I. distributor. Where do I begin to look?
__________________
1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear 85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book. 87 F350 6.9 4 speed dually A poor man has poor ways. |
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#3
06-10-2002, 12:20 PM
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Most likely the problem is a weak battery connection to the instrument panel area. The xtra current used by the HEI in your ignition circuit plus the current drawn by your directionals is causing a voltage drop in your battery feed harness. As a result your tach does not get enough voltage to work correctly.
Look for a bad/weak fusible link or a corroded fuse boxignition switch terminal. Regards, George
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"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum |
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