Hey guys I just picked up an Ef 90 civic hatch with an mpfi swap done. The swap looks pretty good on the ECU side. But I have a few concerns. There is no injector resistor box on the swap, and the distributor doesnt have the round white plugs that my CRX si had. So I am guessing that its not the td 02u dizzy that should be used. When I start the car in the morning, and leave for work or school, it runs well, as it should,(burns oil too). but then when its warmed up, it hesitates under load from around 1500-4000 rpm. I have replaced the Fuel filter, set timing to tdc. replaced all fuses. replaced pcv valve, replaced plugs.

I have done research and I havent gotten any symptoms of some idiot not using the right dizzy or a resistor box on an mpfi swap.

If someone could point me in the right direction on things to check so i dont spend a fortune on a motor that I am going to replace in the near future.

 

Any Ideas? No one has had this problem?

 

I've got the same issue precisely in my 03 CR-V. Just bought it, and it's sporting a replacement engine. Ran fine on test drive, ran fine for quite some time after driving it day 1 (of my owning it) but after it's warm, it wants to hesitate around 2600-3000 RPM.

Thoughts? Ideas? I really don't want a lot of repairs after just purchasing this vehicle. For what it's worth, it passed safety, though I know a vehicle WITHOUT an engine itself can pass..

 

I had a similar issue with my crx Dx with an si swap. Turned out to be my plug wires. A set of ngk wires off Amazon is about $40.

 

I'll just leave this here...

http://www.youtube.com/watch?v=9K78XIhhjAQ"]Video Link: