mustangman65_79

So this is driving me nuts. I'm a frigging car mechanic, and I can't find my own problem.

This normally happens on card starts. SO maybe EGR?
Here is the problem. When I start up the car, Sometimes something under the upper intake rattles. It comes and goes, lasting between 30s and a couple minutes. It normally does it on cold starts, but I have also had it do it while warm.

It sounds like a bad PCV, but it isn't. Is there something else under the intake that runs on vacuum, or another pvc?

TylerSteez

iTrader: (3)

Nothing under the plenum(upper intake) should rattle. Maybe you're hearing noisy injectors? Maybe try a mechanics stethoscope and try to isolate exactly where it's coming from.

mustangman65_79

that's what I thought. But it's definitely under the intake, and nothing inside the motor.

cardo0

Well if its the oil splash gaurd u will have to remove the intake to check. I read the TPI manifold splash guards were bolted/screws in. The carb intakes had a press fit rivit looking fastener. But if your bolts/screws are loose that tin oil splash guard would rattle pretty good.

mustangman65_79

Ah, never knew they had this. SO maybe it is inside the motor.