Need help with factory tach- '79 Silverado - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79 stepside · 10-25-2003, 01:26 AM

After letting my truck sit for a couple of months, my factory tach quit working correctly. It is either at 0 or around 35. Any ideas or a plan of action would be appreciated.

Frank-id · 10-26-2003, 12:09 AM

Hey we have the same truck. Show some pics. We can swap ideas.

The most common reason for a tach to stop working is poor connection at the distributor. Spray the distributor connections with lots of WD-40 or the best PB Blaster. Next check the fuses in the fuse block, and check for good ground at pass side rocker cover. Frank

79 stepside · 10-26-2003, 12:20 AM

Thanks for the ideas Frank. Those sound promising since it does seem to work, just incorrectly. Looks like you have a worthwhile project in front of you. Be sure and take pictures along the way.
My truck has basically looked like this for 20+ years, which the rollbar probably gives away. It always had 265 50's in front and 295 50's in back, but I needed it to be more of a truck again so I went with the stock rally wheels. As you get old, so does all the flash I guess. (by the way, that's 24 year old paint too. Gettin thin on the hood).
Jimmy

bigblock73 · 10-26-2003, 06:28 PM

Nice stepsides fellas.

I agree with frank, check the connections...sounds like they are loose or dirty.

-Jeff

10-25-2003, 01:26 AM	#1
79 stepside Registered User Join Date: Oct 2003 Location: Sunnyvale, Texas Posts: 11	Need help with factory tach- '79 Silverado After letting my truck sit for a couple of months, my factory tach quit working correctly. It is either at 0 or around 35. Any ideas or a plan of action would be appreciated. Attached Images

10-26-2003, 12:09 AM	#2
Frank-id Registered User Join Date: Sep 2003 Location: Twin Falls, Idaho Posts: 73	tach no work Hey we have the same truck. Show some pics. We can swap ideas. The most common reason for a tach to stop working is poor connection at the distributor. Spray the distributor connections with lots of WD-40 or the best PB Blaster. Next check the fuses in the fuse block, and check for good ground at pass side rocker cover. Frank Attached Images __________________ Chevy stepper 400sb 350 turbo Last edited by Frank-id; 10-26-2003 at 08:49 PM.

10-26-2003, 12:20 AM	#3
79 stepside Registered User Join Date: Oct 2003 Location: Sunnyvale, Texas Posts: 11	Thanks for the ideas Frank. Those sound promising since it does seem to work, just incorrectly. Looks like you have a worthwhile project in front of you. Be sure and take pictures along the way. My truck has basically looked like this for 20+ years, which the rollbar probably gives away. It always had 265 50's in front and 295 50's in back, but I needed it to be more of a truck again so I went with the stock rally wheels. As you get old, so does all the flash I guess. (by the way, that's 24 year old paint too. Gettin thin on the hood). Jimmy Attached Images __________________ Jimmy '79 Chevy Stepside (purchased new in '79) '67 Camaro '97 Ford F-150 Diesels: '80 Mercedes 300TD '85 Mercedes 300TD '77 Mercedes 300D (parts car) Last edited by 79 stepside; 10-26-2003 at 12:25 AM.

10-26-2003, 06:28 PM	#4
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,826	Nice stepsides fellas. I agree with frank, check the connections...sounds like they are loose or dirty. -Jeff



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