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Feb 4, 2023 | 08:05 PM

#11

Dee Veloper

Senior Member

Joined: May 2016

Posts: 822

Likes: 215

If you haven't done it already, run a fuel pressure test to insure correct pressure and then run a smoke test to look for vacuum leaks.

Feb 5, 2023 | 03:47 AM

#12

Jbrew

98 F150 5.4L E40D/4R100

Joined: Nov 2006

Posts: 28,490

Likes: 7,619

From: MI

Use MEK to repair any vac leaks at the fittings or elbows. It makes for instant repair and seal. Incorporate MEK with new fittings as well and they will always seal tight. Per Ford engineering and Ford service.

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