I did a b16a swap in my 90 crx dx and it started up and runs, however it idles really high at first, and then after it warms up the idle drops way down to almost dying. It is also running really rich, rich enough to coat the back of my car with a film of black unburned fuel. I brough it to mechanics and the only thing that they could figure out was that the O2 sensors were bad and there was a leaky injector. So I changed the O2 sensors and all of the injectors. Then I had the timing checked and that is perfect. The Timing belt was replaced and that timing is good also. I replaced the spark plugs and right after I did that I started it up and then shut it off and checked them and they were all black and covered in carbon. I'm running a PR3 ecu. Does anybody have an idea of wtf could be wrong. I'm sure that somebody has had the same problem. I dont have a fuel pressure regulator, because that would only cover up the problem I want to fix it not cover it up with a fpr or a vafc or something like that.

 

Your car would have blown up along time ago if you are running this rich and driving the **** out of it, I would try a different ecu.

 

I have a PW0 ecu that does the same exact thing. It also boggs out in lower RPMs and then when it gets to higher rpms it gets better, but it is still alittle jerky when riding at a constant speed.

 

sounds like a timing issue or and electical issue.

 

Well the timing is perfect. I dont know where to check for an electrical problems.

 

did you convert from dpfi to mpfi?

 

Are you running an aftermarket fuel pump? have you checked your fuel pressure?

K

 

why the double post?
https://honda-tech.com/zerothread/1647622

 

make sure you are running a resitor box if you have the injectors that require it.

 

I havent changed the fuel pump, its perfect fuel pressure the mechanic checked it. And I need a resisitor box