I have a 1996 civic HB I put a b16a in and it had an automatic. I changed the TB gasket today. Heres he problem I let it idle for a while not check engine very smooth idle. I drove off and the speedo did not work and the check engine light came on. I got home turned the car off and waited a few minutes. I got in started it let it run and no light. I drove for about 2 minutes and the speedo worked, no light YET!!! Then the speedo stopped and about 15 seconds later the light comes on AGAIN and the car idle at about 1200 RPM's now and has a little bit of a miss.

Can someone help???????????????

Thanks
Jonathan

 

Oh yeah it is a 1999 Civic Si gauge cluster. It has worked fine for 4 months until now!!