Stall or hesitation when stopping

[JEDIDADDYCHRIS]

How long since the last fuel filter change? Did you ever propane or smoke test for vac leaks?

FF and vac leak checks are easy enough to do if they have been ignored to now.

FF being changed next oil change; also O2 sensors. If that doesn't do it, then a smoke test is next, looks like. Thanks!

 

[BAD RONALD]

I hope the vacuum leak (that it seems you have) turns out to be an easy fix. You deserve a break considering all the work you have already done to your Expedition.

 

[JEDIDADDYCHRIS]

New fuel filter last week, and my ace mechanic checked for leaks; all good. Will try a cigar test.

 

[JEDIDADDYCHRIS]

One week and the CEL is back. Argh.

 

[JEDIDADDYCHRIS]

I have replaced every part that can be replaced and I still get a random hesitation with a rolling stop or down shift or up shift in a slow turn.
It acts like it cannot decide what gear it wants to be in and then takes off.

If I stop completely no hesitation.

I have decided to live with it.

02/15/2013 8 New IC369s COPs
02/15/2013 8 New Injectors
02/15/2013 8 New AP103 Platinum Plugs
02/15/2013 New KN Air filter
02/15/2013 Fuel Press Regulator
02/15/2013 Fuel Pump
02/15/2013 New MAF sensor
09/01/2013 New IAC Throttle motor
10/01/2013 Transmission Drain and Fill.
10/01/2013 New EGR / EGR Sensor
11/01/2013 Reset ECU / Throttle cable tightened
11/01/2013 New TPS and cleaned Throttle body.
01/15/2014 New VSS/ABS sensor
01/15/2014 New PCV valve

Checked and or replaced all hoses.

O2 sensors aren't on the list...that's next for me if the smoke test for a vac leak doesn't find something.

 

[JEDIDADDYCHRIS]

Fuel pump died...replaced a month ago today, and CEL hasn't come back on. MYSTERY SOLVED.

 

[srs7324]

Yep never replaced the O2 sensors. Yet.