Bad idle when starting the car

[slow_talon]

every morning when i start the car to warm it up i notice that it has a bad (lumpy) idle for a while then it goes like to 1200rpms and the car starts to work well but this has happen to me since this last week and i was thinking of doing an overhaul or changing the timing belt my car has 140,000 miles. Any help would be greatly appreciated

 

[mazdamx6pwr.com]

When is the last time youve done a tune up? Maybe clean the intake manifold.

 

[ivanr4g63]

A good injector cleaner, Throtle Body cleaner or MCCC, and maybe new spark plugs should be able to clear that up... not a bad idea to inspect your spark plug cables.

 

[slow_talon]

thanks i will chek the cables

 

[TurboAWDKID]

I know when I start my car up it idles around 2 grand or so and moves up and down some times. Its fine after I drive it for a little. I was told this is because the car is cold so it revs higher to warm up. Maybe thats your prob, but not sure.

 

[slow_talon]

no it has a poor idle and then it goes up and then back down and starts shaking a little.