Engine whistling!

[87_jpchrk]

I have just finished the mods on my 1987 Laredo and now I am getting a high pitched whistling at Idle from around the intake! The noise appears after it has warmed up and after I have raised the idle! I thought I had narrowed it down to the AIV when I wiggled the wire it changed pitch! I changed that and it still does it! I have replaced the intake and exaust manifold (other reasons), checked all of the vacuum lines and also sealed the intake boot to the TB! What am I missing here? Could it be coming from the TB gasket?

Brian

 

[Roll-over]

what did you mod???

 

[87_jpchrk]

The mods were mostly suspension and late model trans t/c and clutch master! Nothing really to do with the engine! I should of made that a little clearer! The vehicle has been sitting for over a year! The engine is all stock except for the port matched intake and exaust ports!

Brian

 

[ghettocruiser]

Check for buildup and dirt down in the throttle body. Make sure the butterfly doesnt have any crud around it. Reason I suggest this is because I recently took my throttle body all apart and cleaned it. Upon re-assmebly, I broke one of the screws securing the butterfly. I replaced it with the best thing I could find. Its tight, but the screw head doesnt seat all the way down like the other. It makes a really loud whistle at certain RPMs. Usually around 2,000 or so. Just an idea.

Justin

 

[87_jpchrk]

Thanks for the tip! The intake has been hot tanked and the TB was high polished by hand! I had the boot off this past week and it is spotless! The only thing I think it might be would be the base gasket! I will try changing the gasket tomorrow and will post my findings!

Brian

 

[mileshigh]

nope Ill tell you what it is because i let dodge Fix mine, Your Intake Gasket has sliped or has a hole. It cost me $600.00 to stop that high piched whistle.