Tach not functioning at all

1981 Corvette has an electical tachometer that is driven by impulses from the distributor. First, check for blown fuses, next make sure the tach wire is plugged into the distributor. Next bypass silver tach filter or capacitor located by manifold to see if the tach moves at all. If these steps do not reveal a change in tach operation, then the most obvious next step is to remove the tachometer and get a new board for the tachometer. Unscrew and remove cluster lens and then unscrew tach bezel, and gently pull out the tach noting position of insulators. I believe these boards are available still at local autoparts locations. Replace board, note position of insulators and reinstall tach, bezel and lens. Old corvette are cool and are pretty easy to work on! Should be fixed, enjoy!

Multiple possibilities. Will start with easiest/cheapest. You don't mention check engine light (that would give codes), so I'll go with the same issue we've had with newer Blazers. That would be the ECM in the distributor. When ours started going bad, it would cut-off intermittently. Well one day the intermittent was terminal. Anew ECM, for the 2.8 V6 (1987) is approx 45.00. You would have to price it for your vehicle based on year and engine size. The worst case scenario is loss of timing gear. (That happened on our 67 Buick with 300 V8). Another thought is what happened to a friend. He's putzing on down the highway when his 88 Pontiac Grand Am simply quit. His computer had bit the big one. Those are the only things that come to mind, other than running out of gas or your alternator had quit charging your battery and the battery finally lost enough power to spark the plugs.

most likely but I am not exactly sure what ones other than shift connections and speedometer sensor(etc)

When searching for rocker arm adjustment on 1998 s10 and you come across search result in googles main searches titled " rocker arm adjustment on 1998 chevy s10 2.2- one would usually expect the search result to at least mention the year/vehicle and correct engine size somewhere on the page! But to appear in search as " rocker arm adjustment 1998 s10 2.2" then as soon as you get to page it suddenly only mentions the 4.3, or chevy impala, IS NOT THE SAME AS THE LYING DECEIVING SEARCH RESULT STATED! Results like this should be removed!!

Are you having problems with headlights or interior lights flickering or dimming for no apparent reason? You are not alone! Many other consumers have reported experiencing the exact same problem. The problem is seen in many different GM makes and models including, but not limited to: Chevy Suburban, Tahoe, Silverado, Corvette, Camaro, Firebird and Malibu's and Pontiac Aztek's.
Why Are My Headlights Flickering?The headlight flickering or dimming may be caused by a intermittent low voltage output from engine vibrations. When this occurs, a voltage spike causes the voltage regulator to reset. During the reset, generator output drops to almost zero. This is a known issue with GM cars and the correction involves replacing the alternator. Would recommend seeing dealer for proper alternator application to resolve concerns. Probably has a superceded part number to indicate internal changes.

What size engine does this have Rose?

check vacum lines for leaks in the headlight assembly,sometimes they dry rot,the vacum lines] it has to a vacum issue. you may need to replace the vacum lines with new vacum hose. you can but it by the foot at any parts store, but you'll need to carry a peice of old one to get exact size.trace the vacum lines from headlights to the source of vacum canister,just to be sure that the canister itself isn't leaking. look for cracks in the vacum lines along the way.if you find that the canister is cracked,it can be repaired by jb weld and repainted,just to keep it original.thank you for choosing fixya.com

go to an autozone let them download computer...they can also turn off check engine light...then restart engine and see if sameting happens...sound like vehicle is in "limp mode"

u may need a speedometer signal generator if dash gage is on just not reading speed its located on the left rearend of tranny just remove wiring clip and 1 hold down bolt and pull out easy to replace but if its problem with dash gauge's u may need a dash printed circuit board for speedo/tach

there are rechargeable aa batteries that wear out over few years and have to be replaced behind the tach on some cars.. I just did it on a BMW and the tach started waorking again as well as the gas mileage indicatoor gauge