Making a thread here aswell seeing it's a Prelude engine...

Like title states, I have a 1990 Honda Accord with a JDM H22a swap. Fidanza flywheel, EGR block-off plate, No O2 sensor(Due to 100% throttle all of the time). Fuel pump, ignition, Fans, and starter are all on switches, currently using the JDM P13 ECU, have also tried the USDM P13 ECU.

Here is a video of what the car does;



The issue arises at 2:22 into the video.

I've changed MAP sensor, ECT sensor, Bypassed FPR to ensure full 43psi all the time, all fuses are good, and a bunch of other suff.

Today I noticed that my TPS was at 0.63V@idle and 4.73v@WOT. Re-adjusted it to the proper readings of 0.45v@idle and 4.50v@WOT.

Check the injectors and found a slight crack in the pintle cover of one of the injectors. I researched and found that the injector is fine if it's just the pintle cover that has slight damage.

I also noticed that the car will redline at 6500rpm rather than 7500 like the stock P13 H22 should. This indicates that something clearly isn't right. I tried wiring up something to pull codes, but no luck. Grounded the D4 pin then took a test light to A13 with the ignition on hoping it would flash and give me codes, but no luck. Or am I doing this wrong?

To conclude, the plugs signify that the car is running lean. If I turn of the power and restart the car in the middle of a run th eproblem wont come back for a lap or two because the ecu resets itself...

Any ideas? I'm stumped aswell as everyone else at the track in my division.

Thanks in advance!

PS Will be racing tomorrow to see if the TPs adjustment will do anything...

 

Running without an O2 sensor will cause a check engine light, which will limit your revs to 6500. I'm guessing you have other check engine lights as well.

What you really should do is get a tuneable P28 ecu running Neptune or hondata and have the car dynotuned to run correctly and to eliminate and diagnose any other issues such as wiring or missing sensors. I would also reccomend having your injectors cleaned and flow tested to make sure they are all working and working equally. If you continue to take it to the track you will just damage the motor if you havent already.

 

Is this a dirt track car?

If so, the ecu internals must "appear" untouched depending on the class. That being said leaves you limited to chip version of tuning which is neptune, crome and s100 hondata