My 1989 F150 has been idling high and also seems like the RPMs are high also when changing gears. Seems like I'm changing gears sooner. I have put some Fuel Injector & Carborator cleaner in the Gas and ran it all through, but it is still doing it. Any ideas?

Thank You,
Matthew

 

You've probably got a vacuum leak,the intake gaskets may hae acrack in them or a vacuum hose may be leaking.

 

Thank you Mike, I'll check it out tomorrow. I'm also going to attempt to change the spark plugs. My truck is at 114k now and I don't think they have ever been changed. Any tips you or someone else may have would be awesome. I'm new to "do-it-your-self" mechanics, and really looking forward to learning how to take better care of my truck.

Thanks,
Mathew