1994 honda prelude vtec speedometer tach problem

with a probe light get into back of dash board and see where power is or isnt

Disconnecting any sensor will cause a non working car to work suddenly.I would check two things. 1. The Transmission control module- vary rare issue. 2. the ignition control module. These break down a lot in Honda's. In the 96-98 model of the civic, the dash uses the tach built into the ignition control module. the 99-00 model doesn't use the ICM tach signal, but uses the same module. Test your ICM with a digital multi meter ($5 @ harbor frieght), before dropping $60- 140 on one.

have your water pump checked

your tranny worn out

sounds like the pickup tube may have fell off or not on properly or loose

Its probably your speed sensor mounted on the back side of your transmission on top of the final drive gear. Its the sensor/plug located just under the shift linkage. Make sure its bolted down tight and check for any loose connections.

Just fixed this myself. I found a used USDM meter/gauge out of a 1995 SI on EBAY for $200. However, I have a VTEC engine that redlines at 7500 RPM and the SI's redlines at 6500 RPM. Easy to fix by swapping the face plates inside of the meter/gauge. If your issue is the bulbs they cost a lot... around $250 each. But if your lights went out simultaneously then the bulbs are not the issue... it's the power supply where the bulbs plug into and that's located behind the drivers dash speaker (very easy to remove with only two screws holding it in). This part is more expensive at around $350, but cheaper than buying two bulbs. Scroll through every page of honda prelude listings on EBAY and you may just get lucky like I did. Hope this helps.

Intake valve clearance 0.15mm-0.19mm (6-7 thou); Exhaust clearance 0.17mm-0.21mm (7-8 thou). All measurments COLD engine. 2.2 VTEC Prelude engine 1992-1996, import and UK.

speed sensor servo common on hondas weve done many due to the d4 light and eratic speedo

you can do what i do keep going to wrecking yard and buy one there but i will tell you the truth the speedometer is the problem it is a defect the dealer doesnt reconize this , when it stops working smach the top of it that works for me i think its a lubercation problem my self