Recently bought a 93 civic hatch with a B18B swap. Has full integra dash, console, and jdmcluster. Problem I'm having is when I start up in the morning the engine revs at between 3500 and 3800 rpms. After about 2 mins it decreases gradually to about 1800 rpms which is where it idles at. The IAC sensor was replaced before I bought it. The IAC looks new but who knows. I was told it could be the TPS sensor. Anyone have any other ideas as to what it could be.

I'm new here and will get up some pics asap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg_hatch8482 &raquo;</TD></TR><TR><TD CLASS="quote">Recently bought a 93 civic hatch with a B18B swap. Has full integra dash, console, and jdmcluster. Problem I'm having is when I start up in the morning the engine revs at between 3500 and 3800 rpms. After about 2 mins it decreases gradually to about 1800 rpms which is where it idles at. The IAC sensor was replaced before I bought it. The IAC looks new but who knows. I was told it could be the TPS sensor. Anyone have any other ideas as to what it could be.

I'm new here and will get up some pics asap. </TD></TR></TABLE>

replace the pcv valve. they usually due this when they are clogged. cost $3 brand new.

 

Changed out the pcv valve after work today, and it didn't fix the problem. The B18B1 came out of a 95 integra. I put in a 1.8L pcv valve. Anyone think it could be the tps sensor? Or anything else they can think of?

 

Check your FITV

 

Going to clean out the FITV today and see what happens. Will update when I'm done.