SOURCE: 2004 toyota corolla idle jumps
If you dont have any trouble codes, this usually occurs when the idle air control valve (IAC) is going bad.
SOURCE: idle is too low, car dies, engine runs fine
An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body. The car computer or ECM (electronic control module) receives information from various sensors and will output signals to adjust the IAC motor in or out to adjust engine idle speed by controlling engine idle air.
An IAC motor is highly susceptible to carbon and coking build up; if an IAC goes too long without cleaning it can cause stalling and poor idle quality. Some cars are designed with a large vacuum transfer hose that connects the intake manifold to the IAC (idle air control) motor. If a broken or dilapidated these vacuum lines can cause the engine to lose vacuum which will allow the engine to run rough and die.
Inspect all engine and accessory vacuum lines to look for missing, torn or dilapidated lines and replace as needed. To check the IAC motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the IAC should move in or out.
If the IAC motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the IAC motor is removed clean (use aerosol carburetor cleaner) the passages the IAC uses to control idle air speed.
Good luck and hope this helps
SOURCE: enging vibrating at idle
1) It is very possible your engine mounts can be worn, but
2) the vibration you feel may be also due to the idle itself degrading to the point that the car is shaking. Does the engine sound like it is getting ready to die? what is the engine rpm when you feel the vibration? You may just have a dirty throttle body. In this case, clean the throttle body plate and bore and the problem will go away.
3) did the problem seem to come on suddenly or gradually, if gradually, you may just need some plugs and/or wires, and/or cap/ignition rotor, etc. (a tune up)
4) Also, do you only feel the vibration when the AC system is on?
5) there are some other reasons for abnormal engine vibration at idle, but the above are some of the most common, and simpler to repair.
All the best with the repair!
SOURCE: 2004 honda crv brake won't release
Your emergency brake is a mechanical brake system that is indipendant of the regular hydrolic system. If the red brake light on the dash is on make sure it's the emerg. brake and not a problem with the fluid level or the calapers sticking. the best way to check the emerg. brake is to rase both rear wheels off the ground and spin them. If they spin, the emerg. brake is not locked up. If they don't spin, take the rear tires off and the brake drums. (you may have rear disk brakes.) check the springs to insure they are all hooked up properly. If there is no problem there, follow the parking brake cable to check for damage. The cable is like a brake cable on a bike, If the inner cable is binding inside the cable sleeve,the brake wont release. If you have rear disc, it's probly a bad calaper.The park brake cable is attached to the calapers. Rember if it wont run it's annoying but if it won't stop, it's deadly. DON"T experiment with brakes!!! If in doubt, take it to a pro.
SOURCE: 1998 honda crv vibrates when starting out
Increased vibration from a vehicle indicates worn out engine supports. This vibration often disappears when revving the engine high, but is very noticeable at low revs.
You can have these inspected and possibly replaced to reduce the vibration cominf from your engine.
Hope this helps.
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