My vs on idle is very rough the whole car goes up and down in the rear and almost stalls does this hot and cold any ideas ??
Could be worn out plugs and leads, air filter could be very clogged, throttlebody could do with a clean.
Try taking off the throttlebody and the upper part of the intake plenum, give them a good clean, also replace the air filter if it is visibly filthy. That shouldn't cost too much to do and may see some improvement.
Service time.
Mega service time
- Spark Plugs
- Leads
- Engine Flush & Oil
- Oil Filter
- Air Filter
- Check/Replace vac hoses
* Back of the plenum to fuel reg
* Bottom of the throttlebody to the manifold. (if it's never been changed its almost definitely cracked)
- Fuel Filter
- Clean Injectors (probably best to replace them or get them tested)
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