can u bypass a knock sensor?

[Nokomp]

I understand that if u f around w/ the ecu u can run an h22 w/o it.

however my question is... Is there a more "temporary" way to bypass the knock sensor so the h22 runs a little better (feels like the im drivin my S10) until the NEW knock sensor gets here?

[FAK_LAF]

I'm not sure if bypassing the knock sensor is a good idea in the first place. That sensor detects pre-ignition or detonation and retards the ignition timing accordingly. Bypassing this safety feature could damage your motor's internal components. If your air-fuel mixture is combusting before your piston reaches TDS, which is what the knock sensor detects, than excessive stress will be experienced by your pistons/rods/crank.

The H22 has a knock sensor for a reason. Unlike the F22, the H22 has a higher compression ratio, which makes it more prone to detonation induced by the higher gas pressure at TDC. This higher gas pressure, mixed with a fuel, and cylinder temperature is what causes detonation. Honda is aware of this which is why they implemented a knock sensor to help delay the combustion.

I personally would wait until your new knock sensor arrives before driving. Or, at least be conservative on the throttle/RPM until you have a functioning knock sensor.

[deevergote]

You need a chipped ECU to do that... which, done correctly (safely), will most likely cost a good chunk of money.

If you want the car to run with no CEL for the knock sensor, put a PT3 or PT6 in there (the F22A ECU.) Don't drive it hard on that ECU, though. It will fuel the car well enough to be driveable... better than the open loop setting that it is most likely stuck in with the CEL on.

[Nokomp]

ok

I have the ecu for my f22a4 (manual). just wanna make sure that using it should not fry/burn anything out? Simply because the h22a that i have came w/ an automatic ecu which i had converted to manual... vtec & ks are wired straight to the ecu i guess because im using the accord harness.

bonus question: could i fry/burn out the knock sensor if a plug in an h22 ecu w/ the ks disabled?

[ACCLUDE91]

No you won't burn anything by using one of those ECU's and no you won't burn anything with the knock sensor disabled.

Mike got it. The only other way to bypass the knock sensor would be to trick it. Unscrew it from the block and plug up the hole that on the other side facing the engine. That hole is designed to pick up sounds in the 5-10 khz range which is what the engine knock is. If you plug it up with something to prevent the sound from reaching the sensor, or lower the frequency of the sound to below the 5khz range, you will no longer get any knock errors. This is of course assuming the knock sensor is not physically broken. Good luck!

[Nokomp]

cool

i'll try the f22 ecu in the mornin... no vtec for me.

[SINGLECAMSLAM]

You can still activate your vtec w a toggle, or more carrectly, an rpm activated switch. Kind of ghetto, but I have mine hooked to my horn button. (trademark)

[jdmwannabee]

You can still activate your vtec w a toggle, or more carrectly, an rpm activated switch. Kind of ghetto, but I have mine hooked to my horn button. (trademark)

that's actually bad advice.
vtec should always be ecu controlled.

an actual rpm switch is a little better but for the trouble it might as well be hooked up to the ecu.

http://www.honda-tech.com/showthread.php?t=1181854

knock sensor bypass was the first thing that came up in a google search.

[djcaz_aom]

You can still activate your vtec w a toggle, or more carrectly, an rpm activated switch. Kind of ghetto, but I have mine hooked to my horn button. (trademark)

Okay, and how do you enrich the maps to adjust for the extra lift?

Bad idea.

Crazy, just unplug the sensor and leave the H22 ECU in there. It will throw a CEL
but won't be getting any readings from the sensor to retard timing. You won't have performance, but will run better than an F22ax ECU.

[Nokomp]

report

Big A, i actually unknowingly did that already. drove w/ it unplugged. still drove like crap, crappidy crap, the thought of selling her ran threw my mind. i think i have an ecu prob. i plugged in the f22a4 ecu that my coupe came w/. ran nice & smooth today. good pick & everything. for the first time in about 2months i actually enjoyed drivin my ride. anyways im not gonna worry about it too much until after the NEW ks is installed... then i'll be really cryin for help if no progress is made!


thanks for eer bodies help! see ya'll in HOUSTON on the 20th

[pninja82]

Sorry to hear your still having trouble with it.I like your ride.You had just left teddies the other day when i was on the way.Im glad your making to Houston with us.Do you think youll have the KS intalled or are you gonna be easy on her.Temptation is bound to strike once we're out there!