hey guys! a newbie here with a question.i have a 92 f150 with a5.0 and a really high idle. i have replaced the tps,map sensor, iac, and temp sensor,but still not fixed.checked all the vacuum lines and also pulled out a lot of hair in the process. i suspect a manifold leak some where under the upper intake. is there an easy way to check it?

 

Get a can of brake cleaner, and with the engine running spray around all the intake gasket areas. If there is a leak, the idle will change when you spray it...

 

Welcome to the MN chapter and FTE Toby!