In and out of VTEC, is this okay?
06-06-2007, 02:18 AM
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In and out of VTEC, is this okay?
Hey Fellow S2Ks,
I went for a drive with a fellow s2k on some country roads last Sat. I noticed on one stretch of road, that I would be in VTEC, then in out of VTEC within 1 second to 5 second several tiimes.
Would this cause any damage to the VTEC solenoid or the cams itself, long term wise?
Would you recommend next time just to stay in VTEC and above longer?
TIA
I went for a drive with a fellow s2k on some country roads last Sat. I noticed on one stretch of road, that I would be in VTEC, then in out of VTEC within 1 second to 5 second several tiimes.
Would this cause any damage to the VTEC solenoid or the cams itself, long term wise?
Would you recommend next time just to stay in VTEC and above longer?
TIA
06-06-2007, 06:11 AM
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Please be more precise about the problem. Were you causing this by raising/lowering RPMs across the 6000 threshold? If so learn to drive more smoothly. Better for the engine/drivetrain and people aboard.
Now assume that your driving wasn't the problem. That means VTEC engaging / disengaging rapidly while engine load & speed remain fairly steady. This would be a problem with the VTEC system.
First thing, check your engine oil level and condition. The VTEC system uses oil pressure, switched by VTEC solenoid at 6000 rpm, to actuate the pins in the rocker arms that will follow the fat VTEC lobes on the cam. If your low on oil, or oil is too old or thin, then there might not be enough oil pressure to solidly engage VTEC.
If oil level is OK, try changing the oil. Use 10W30. THen if problem persists test operation of VTEC solenoid by jumping power to it and feel / listen for it to pull in / stay in without chattering on/off. If that proves OK, then check the oil filter screen in the VTEC solenoid, it may be plugged.
Now assume that your driving wasn't the problem. That means VTEC engaging / disengaging rapidly while engine load & speed remain fairly steady. This would be a problem with the VTEC system.
First thing, check your engine oil level and condition. The VTEC system uses oil pressure, switched by VTEC solenoid at 6000 rpm, to actuate the pins in the rocker arms that will follow the fat VTEC lobes on the cam. If your low on oil, or oil is too old or thin, then there might not be enough oil pressure to solidly engage VTEC.
If oil level is OK, try changing the oil. Use 10W30. THen if problem persists test operation of VTEC solenoid by jumping power to it and feel / listen for it to pull in / stay in without chattering on/off. If that proves OK, then check the oil filter screen in the VTEC solenoid, it may be plugged.
06-06-2007, 06:19 AM
#3
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If you're talking about being in gear X and having rpms rise and fall as your speed increases and decreases, and having that change in rpms fall over the rpms where VTEC engages and disengages, you don't have anything to worry about - the car is simply switching its cam and valve profiles to make the most efficiient use of power. As long as you have oil in the engine, you and the car will be fine.
If you're in a range or rpms there, you may want to consider downshifting and keeping the car in VTEC and up near the redline more as well, as it sounds like you have the room for it.
If you're in a range or rpms there, you may want to consider downshifting and keeping the car in VTEC and up near the redline more as well, as it sounds like you have the room for it.
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