Bad idling, When in Neutral
 

I have a problem in my 5.0, I have a problem when i come to a stop light or a stop anywhere. My car feel like it shakes a bit. I replace the plugs and cables, rotor, and rotor cap, and the problem is still there. I don't know what to do to eliminate the problem. Does anyone have an idea what it could be? Any help will be greatly appreciated.

Joe

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86 Stang
No mods so far, only restored to original

You say the car shakes.....is the idle staying constant? or is it fluctuating when you are idling? Is your car a 5 speed or automatic?

You have to give as much info as possible in order for people to make an educated guess.

Sorry, it's a 5 speed manual. It fluctuates when at idle. The rpm drop a bit and it picks up right away. Please help...

The Idle Air Control Valve on the side of your Throttle body may be gummed up with carbon. Take it off and spray it out with brake clean.

Check your PCV valve to make sure it is functioning.

If this doesn't cure it, try a vacuum test to dagnose it.

Then I would possibly check out your O2 sensors.

Hope this helps.

Good luck.

where exactly is the idle air control valve? I would check this if i knew where it was out.

It is on the right side of your throttle body if you are looking from the passenger fender. It is held to the throttle body with 2 bolts. there is a 2 wire electrical conector at the bottom of it. The device is round and made of aluminum. Take it off the throttle body and spary it out with brake clean.