The Stumbling M20 Engine

[Quinthirty]

I have hard starts again especially on very hot days (car parked under the sun). I remember that this happened to me same time last year. Its screaming vacuum leaks again.

Should I clamp all the vacuum hose ends (except FPR to intake)? I noticed that the one under the intake manifold is not clamped.

Yesterday, while parked on an incline, it started in 2 clicks. After idling a few seconds. It died and took 3 clicks.

Wild question: if there is an intake leak, can it possibly affect fuel pressure too? Or is it two separate issues, fuel pressure and vacuum leaks?

[jlevie]

Fuel pressure and intake leaks are separate issues.

[603Racing]

You're chasing your tail until you get a smoke test done. You might get lucky and find the cause without smoke, but there's only one way to be 100%. Especially if you have multiple issues.