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89 dodge van rough idle cold and hot

Home > Discussion Forum > Mechanic's Corner (general)

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89 dodge van rough idle cold and hot jeff 5-15-08  
Van starts poorly, idle is rough cold and hot, also lack of power on take off.
Re: 89 dodge van rough idle cold and hot Phil Feinstein 5-15-08  
These are the classic symptoms of an intake vacuum leak. Other causes could be:
* Needs a tune up. (clogged air filter, but also bad plugs and wires and/or clogged fuel filter)
* EGR valve stuck part open.
* Bad fuel pressure regulator. (EFI only)
* Blown or leaking head gaskets.
* Loss of compression from stuck or scarred piston rings.
* Loss of compression from a leaking or cross-threaded spark plug.

I suggest doing a full tune up (air filter, fuel filter, plugs, wires, PCV valve, cap and rotor) and seeing if that helps. After that, check for vacuum leaks. You'd be doing yourself a favor if you'd check the EGR valve at the same time.

Hope that helps!
Re: 89 dodge van rough idle cold and hot Sam Watson 5-16-08  
Mini or full-sized van, what engine?
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