Bad KNOCK SENSOR but CAR DIES...WHY!?!
11-25-2010, 02:32 PM
#11
Originally Posted by cdelena,Nov 25 2010, 03:18 PM
If detonation is detected it pulls timing to protect the engine. If it is too sensitive or the ECU too quick to pull timing there is a performance penalty.
As long adequate fuel is used, temps kept in the normal range, and lugging is avoided, there should be no detonation.
As long adequate fuel is used, temps kept in the normal range, and lugging is avoided, there should be no detonation.
11-25-2010, 09:20 PM
#12
I hit VTEC all the time while I was crusing around without the knock sensor, and it was funny to feel the changeover but there would be no extra pulling power..
And I kind of disagree on the lack of power not being noticeable. I would let other people drive my car, including several other s2000 owners, and they immediately complained about the lack of power being intolerable, specially at the higher RPMS.
Happy motoring
And I kind of disagree on the lack of power not being noticeable. I would let other people drive my car, including several other s2000 owners, and they immediately complained about the lack of power being intolerable, specially at the higher RPMS.
Happy motoring
11-26-2010, 02:07 AM
#13
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Originally Posted by cdelena,Nov 25 2010, 09:18 AM
Many of use ECU's that ignore the knock sensor and find it is not a problem.
11-26-2010, 02:08 AM
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Thanks for the replies... they are helping me sort things out.
Here is some new information after afbout 100 miles of driving
with the cel on and the car seemed to be running fine. I am not sure about power loss at vtec range but it does feel a little weak at very low rpms. Then, after about 100 miles of driving, the car turned off completely....it shut off all of a sudden, as if I had turned off the engine. The car would not restart. The window wouldnt even close, like the electrical system was messed up. I jacked the car up, wiggled every sensor I could find, and DISCONNECTED the BATTERY. The car started this time!! There was no CEL. I drove for a couple miles and the CEL came back on. Perhaps, disconnecting the battery reset the ecu, which gave me enough time to start the car? Or I somehow wiggled the knock sensor better into place? I have no idea. BUT WHY DID THE CAR TURN OFF BYITSELF WHILE CRUISING?? (the code can also be a circuit malfunction) Perhaps the knock sensor might not be the definitive problem here. Maybe its electrical, like I pinched a wire or something. The knock sensor IS a preventative measure but an important one so I just need to make sure the problem indeed is the knock sensor.
Here is some new information after afbout 100 miles of driving
with the cel on and the car seemed to be running fine. I am not sure about power loss at vtec range but it does feel a little weak at very low rpms. Then, after about 100 miles of driving, the car turned off completely....it shut off all of a sudden, as if I had turned off the engine. The car would not restart. The window wouldnt even close, like the electrical system was messed up. I jacked the car up, wiggled every sensor I could find, and DISCONNECTED the BATTERY. The car started this time!! There was no CEL. I drove for a couple miles and the CEL came back on. Perhaps, disconnecting the battery reset the ecu, which gave me enough time to start the car? Or I somehow wiggled the knock sensor better into place? I have no idea. BUT WHY DID THE CAR TURN OFF BYITSELF WHILE CRUISING?? (the code can also be a circuit malfunction) Perhaps the knock sensor might not be the definitive problem here. Maybe its electrical, like I pinched a wire or something. The knock sensor IS a preventative measure but an important one so I just need to make sure the problem indeed is the knock sensor.
11-26-2010, 03:52 AM
#16
Originally Posted by fatjoe10,Nov 25 2010, 10:20 PM
I hit VTEC all the time while I was crusing around without the knock sensor, and it was funny to feel the changeover but there would be no extra pulling power..
And I kind of disagree on the lack of power not being noticeable. I would let other people drive my car, including several other s2000 owners, and they immediately complained about the lack of power being intolerable, specially at the higher RPMS.
Happy motoring
And I kind of disagree on the lack of power not being noticeable. I would let other people drive my car, including several other s2000 owners, and they immediately complained about the lack of power being intolerable, specially at the higher RPMS.
Happy motoring
11-26-2010, 04:20 AM
#18
Originally Posted by dan_uk,Nov 26 2010, 04:57 AM
I drove my uk car without one for months and it was ok but I think the ECU pulls timing. When I got it put back in the car ran noticeable stronger.
11-26-2010, 04:31 AM
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Originally Posted by fatjoe10,Nov 24 2010, 05:13 PM
I just put 87 in the car while I waited for the sensor
11-26-2010, 09:33 AM
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Originally Posted by CBRdream21,Nov 26 2010, 05:31 AM
Someone correct me if I'm wrong, but isn't this the exact opposite of what you should do? Higher octane would protect you from the premature detonation that the knock sensor is meant to prevent. By running a lower octane you are increasing the odds of premature detonation which the car cannot compensate for without a functioning knock sensor. Please explain if I'm wrong.