rev crazy
last night i was driving and the revs started jumping all over the place but the engine wasnt revving. the check engine light came on for a few seconds and the lights dim for like a quarter of a millisecond but they do it every few seconds. and the brake warning light came on. it was either the brake warning light or the brake tail light failure light but im pretty sure it was brakes. which is weird coz i got new front rotors and pads last week and the rear ones machined with new pads at the same time.
any info of what could be doing this. i think its prob electrical coz the rev meter is moving but the engine isnt changing.
Donating Member
Check the thick wire that goes to the back of the alternator - it corrodes and eventually breaks off - this can cause a similar problem to yours. Also make sure your battery cables are tight and clean. Finallly do a codes check - link provided:
Checking error codes VR/VS (Revised)
codes 12 and 24. just got a new alternator and wire to the regulator and regulator. new battery as well.
A new project attack
Check the Speed Sensor wiring on the gearbox. Code 24 is No vehicle Speed Sensor Signal.
how do i do this. where is it located?Originally Posted by Wavez
A new project attack
Should be on the drivers side of the gearbox near where the gear stick is. Black roundish thing with 3 wires running into it.
can i still drive it like this? and would that make the rev meter go crazy?
A new project attack
You won't get lean cruise and your idle wont be stable. It shouldn't make the revs jump around on the dash but if the speed sensor is shorting out then it may cause this.
Disconnect the battery for a minute then rev to 2k for 15 secs to help set idle and see if you get the code again.
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