Bouncing Techometer

I've got a '93 Prelude Si & the techometer registers correctly for the first 5 mins of driving time; then it bounces 'til I stop. What's up with this?

hmmm... that's sounds like some form of ecu isn't working correctly. i'd see if it's throwing a code. or take it to someone who could check that for you. maybe try resetting your ecu (unplug it for a few minutes).

if there's a code that's been thrown, there should be a check engine light. you know what though? check your coolant level. is your car running unusually hot or cold?

oops, good point

I had that problem for a few weeks and then my battery would lose charge real quickly. After trying a new battery and nothing changed, I purchased an high output alternator and haven't had the problem since.....may be something other than that but that was the solution when i was having that problem....

it could be the distributor too... my car does it - i got a 98 SH with a jdm motor from a 94 - so the distributor has the CKP, TDC sensors in it. i think thats why mine bounces - only does it about half the time. i was thinking of replacing my distributor to fix it but my car is 1200 miles away from me until mid october :( I'm in the Military going to school in chcago right now.