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Knock Sensor code - Engine light on

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5.7K views 7 replies 5 participants last post by  RedLuder89  
#1 ·
I got my h23 swapped from my car a put in a f22b its an automatic. I just got the engine changed dont think they put an ecu for it. So the H23 is not VTEC an F22b is? Does the Knock sensor have a big effect an should i look into it or just let the engine check light stay on, it comes on about 4k RPM or about 80-90 km it turns on.
 
#2 ·
The F22b is the same thing as the H23. Both are DOHC NON-vtec. The F-bomb is obviously 0.1 liter smaller. The knock sensor i wouldn't worry about. Actually you can delete that and your EGR but then again i don't know your inspection laws up there.

The ECU you need to run the F-bomb with would be a P39. Good luck trying to find one for a reasonable price! I had the F-bomb and brought it back for an H23 simply becuz its just easier to deal with here in the states.
 
#5 ·
Man alot of misinfo here. The F22B does NOT have a provision for a knock sensor. With no where to screw it in, the mechanic does not have a way to put one on there for your p14 to listen to. The knock sensor is nothing but a mere microphone. I have never seen an F22B DOHC before, but you may have some luck finding an unthreaded hole that a knock sensor may go. Now you have 3 choices: you can JB weld that knock to something so it can "hear," you can purchase the p39 which is usually expensive and hard to find, or you can find a chippable ecu (search for which ones they are, usually out of 92-95 Integras and Civics) and have it chipped with the P39 base map or have it chipped AND tuned which I would recommend. With a chipped ecu, you will automatically delete your EGR function, knock (except on the p72), IABS (except on the p72) and you will be able to add functions such as shift CEL light and launch control or remove functions such as o2 sensor to run a closed loop (which I don't recommend....it really murders gas mileage). I currently run a P06 ecu with VTEC added in in my 92 Accord wagon running an open loop (o2 sensor on) and I get a consistent 30mpg with no a/c blasting. Also, if you were to swap to a different type of motor such as an H22a, all you need to do is swap the chips and you are ready to go!
 
#6 ·
ok well the gas mileage seems to be the same an it only kicks on when i hit higher rpms or get to about 80-90 km so 50mph? doesnt overheat or anything is it a NEED FIX? thanks for help guys
 
#8 ·
When I originally bought my car I had the F20A DOHC motor in there running on P14 ECU. Wasted a lot of gas. I had sold that motor to a friend who tore it down and had told me there was alot of carbon buildup on top of the pistons and combustion chambers. I would definitely get the correct ECU even if the P39. is alittle on the expensive side. Just my .02 ......:)