Took it into the Dealer. System would not hold vacuum. They replaced EGR Cooler, Oil Cooler, T-stat, misc. Factory Warranty. so far so good. heatertreaterMemberPosts:50 September 2008 The problem is usually not the heater core, but the blend door. The F150(and Expedition/Navigator which ...
Did you spray the intake and check for small or large vacuum leaks at all? That will cause the same result, moreso with Reg gas than with Super. You might also try running injector cleaner through it and then change to a stage hotter plug. You have to wait until after, because it ...
Your fuel pressure regulator could be bad. It could be leaking. The vacuum line may be off or cracked. Reply 0 Mar 31, 2019 | 12:28 AM Share #13 Rick Deis New User Joined:Mar 2019 Posts:4 Likes:0 Picked up a INNOVA OBD2 and a fuel pressure gauge as I'm determined to find the...
Bingo it runs and idles perfect. PCV had failed and was acting as a vacuum and leaked sending un-metered air into the intake. Oh and the new PCV valves have plastic 90 degree nozzles on them now. Do not worry pull it off with some pliers and mount your original hose b...
(it avererages 30-40 psi with vacuum hose connected to fuel regulator and nearly 60 psi when removed)6)I tried "capping" the vacuum tubes to the fuel regulator,egr,evaporaative control valves to verify that none of them add or cause the hesistation. (they did not)7)Checked throttle ...