man my friend has been putting 89 in my h22 civic for the last two days and when he raced it it felt weird almost like holding back at top end. I went to a race shop and they told me to run 93 but im worried with the racing that i gave my motor (about 8 times) i may have screwed something up. Please help!

 

can you explain yourself a little better.

 

lemme get this straight, you let your friend race your car, AND put 89 octane into your H22? Now the stock compression US a1 is 10.0:1 or something like that, and requires that you use premium unleaded for REGULAR driving, so that should be SUPER CAPITALIZED if you are going to be racing, running mostly higher rpms for sustained periods of time. If you have a JDM H22, which is 10.6:1, it's even worse to use 89. Coming here now is like me driving my car with the oil light on for an hour on the highway, then posting to ask if I maybe did something wrong.

Nevertheless, you can't change the past so I'll lay off. What ECU are you running? If one that will utilize your knock sensor, you should've thrown a code if there was any knock. If you're not running an ECU that uses the ks, you're kinda in a hole. My only suggestion is run a compression test, hopefully there wasn't any detonation, but driving on 89 is a big no no, racing on it is asking for trouble.

 

^what he said

 

Hopefully the knock sensor is seeing a problem and is doing the "holding back." Put good gas in in, or octane booster, and give it time to mix. That's about all you can do without taking things apart... other then a compression test.

 

stick a hose down there and start sucking it out

 

^ lol, and if you can't do that, drive conservatively on this tank of gas (if you have any 89 left in there). What do I mean by "conservatively"? No hard driving, keep your RPMs around 4k or less, oh yeah, and stop letting your friends race your car.

I also didn't know that our ECU will operate off a signal from the ks and put the car in a limp mode. Is it just OBDII or do all H22ax's do that?

 

If its got a knock sensor all of them should compensate for shitty gas.