i have a crx with a ls swap. when i get on it hard at about 6k rpms it cuts out like i hit the rev limiter for a sec and then goes fine. im not sure what it could be. any help would be nice. thanks

 

any CEL? last time you did a tune-up?

 

no cel but i just did the swap and replaced all but the wires. could it be the wires b/c it only happens around 6k?

 

my car does that somes times. It's the fuel pick-up hose on the fuel pump in the tank, It gets some air in it and ofcourse no fuel, no power.

 

try replace the wire and see what happen! coz it happened on mine it misfire on high rpm

 

What ECU are you using?

 

did you repalce your fuel pump? The ls engine is supposed to run from an average of seven psi. That means, if you are using a stock fuel pump, that when you get up into the high rpm it is trying to suck a little more fuel than is available and you will run more and more lean until it just can't run until fuel can build up pressure again. That is what I would try.

 

7 psi? wtf are you smokin? lol

OEM fuel pressure is 28-32psi, when WOT the fuel pressure bumps to 38-42psi.

your oem pump should be fine for a LS motor, aslong as it's not bad. if it worked fine for the previous motor then dont' worry.

 

You are correct. OEM fuel fressure on the CRX is 28-32 psi and 38-42 @ WOT. On the integra however, the OEM fuel pressure is 41-47 psi. I was wrong about thw 7psi thing. I didn't realize the fuel pump bumped up at WOT. I thought it was supposed to be at 38-42 the whole time. Oh well, I was tryng to help a fellow honda tuner, not bash on other people's worthwhile information.

 

yeah the fuel pump seemed fine with the old motor. i am using a pr4 ecu. this only happens when the car warms up.

 

The fuel pump should seem fine with the old motor. If you read what I wrote, you might have some luck. You went from a 1.5 or 1.6 to a 1.8 liter engine. I wasn't trying to be rude. I have that swap and when I had that problem, I wanted it fixed. I went and did some research. I am not just making suggestions. I am trying to help you from experience. Do what you want.