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Expedition: 2000 Expedition V8 4x4 started stalling intermittently

Customer Question
2000 Expedition V8 4x4 started...
2000 Expedition V8 4x4 started stalling intermittently when shifting into reverse and drive. Changed plugs, IAC And cleaned throttle body.
Submitted: 1 year ago.Category: Ford
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Answered in 16 minutes by:
5/3/2016
Ford Mechanic: Greg, Technician replied 1 year ago
Greg
Greg, Technician
Category: Ford
Satisfied Customers: 7,199
Experience: 17 years Shop Owner /Technician. 27 years experience,
Verified
Is the check engine light ON when the engine is running .Greg
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Customer reply replied 1 year ago
No
Customer reply replied 1 year ago
It haves more power after cleaning throttle body and tries to recover when it stalls
Customer reply replied 1 year ago
Are you still there
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago
Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1,529
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified
Hi there.The EGR system could be intermittently malfunctioning. Here is how to diagnose this issue:EGR ValveEnsure all vacuum hoses are correctly routed and securely attached. Replace any crimped or broken hoses. Ensure there is less than one in. Hg vacuum to EGR valve at idle with engine at normal operating temperature.Install tachometer. Disconnect Idle Air Control (IAC) wiring harness connector. Remove and plug vacuum hose at EGR valve. Start engine. Idle in Neutral. Note idle speed. Using hand vacuum pump, slowly apply 5-10 in. Hg vacuum to EGR valve. When vacuum is fully applied, engine should do one or more of the following:Engine should stall.Idle speed should drop more than 100 RPM.Idle speed should return to normal when vacuum is released.Service or replace EGR valve if engine does not stall or idle speed does not respond as specified. Reconnect IAC harness connector. Unplug and reconnect vacuum hose at EGR valve.EGR Vacuum Regulator (EVR) SolenoidTurn ignition off. Disconnect EVR solenoid wiring harness connector. Measure resistance between EVR solenoid terminals. If resistance is not 26-40 ohms, replace EVR solenoid.Please let me know if further assistance is needed. If not, kindly accept and rate my answer now.Best Regards.
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Customer reply replied 1 year ago
Sorry for the delay, I thought I fixed it. I checked for vacuum leaks and used SeaFoam in the three locations it said. I had it running beautifully for a day. My son took it to work and was slowing down for red light and he had no acceleration. He coasted to a empty lot and every gear acted like it was in neutral. I called tow truck and when they picked it up this morning it drove fine on to the truck. It was making a whining noise last night when revd up. It's at a Ford dealership now but they can't look at it until tomorrow; what's your thoughts?
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago
Do you mean it now has a transmission issue?
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Customer reply replied 1 year ago
I don't know, it acted like it was in neutral no matter what gear. This morning it was fine
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago
Well, if the transmission won't engage when shifted to any forward or reverse gears, then there's definitely a problem with it. Isn't Ford checking this for you?
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Juan Crespo
Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1,529
1,529 Satisfied Customers
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European

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