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I am purchasing a 2003 Excursion with a V10 sight unseen this weekend. It has a stalling issue. Apparently it will run and then die. What are the things I should look at besides the fuel filter. The owner said the fuel pressure was ok.
The truck was just dropped off at my buddy's place. Looks like the the crank and cam sensors were replaced with oem sensors. I haven't touched it yet. I won't get out there until later this week. My friend started it and let it idle. Can the idle air control valve cause an intermittent stall condition?
The IAC can cause stalling issues. So can a fuel filter, fuel pump, vacuum leak etc...
Check for codes first and go from there!
The filter is changed. The tank will get dropped and checked. I might change the pump if need be. If the IACV is bad, will it be bad constantly or can it fail intermittently?
The filter is changed. The tank will get dropped and checked. I might change the pump if need be. If the IACV is bad, will it be bad constantly or can it fail intermittently?
WHY would you drop the tank for fun Maybe you should check the fuel pressure yourself ..
Does it stall when you pit it in reverse? When you stop abruptly? Mine was doing that and I replaced the transmission filter and replaced fluid with synthetic. Fixed it immediately.
Does it stall when you pit it in reverse? When you stop abruptly? Mine was doing that and I replaced the transmission filter and replaced fluid with synthetic. Fixed it immediately.
That's interesting. Fluid and filter changes will be the first things that I will do. I am just trying to get a jump on this stalling issue.
A bad idle air control valve will prevent adequate air flow to the engine and will result in increasingly lower RPMs when idling. The number of RPMs, while idling, will vary a bit based on the individual vehicle but is generally considered low when below 800 RPM. The RPMs will increase to normal levels when the accelerator is pressed.
Stalling
As the air control valve becomes increasingly clogged, the engine RPMs, while idling, will continue to drop until the vehicle stalls. This problem can usually be identified by applying the gas. When the vehicle is about to stall, pressing the accelerator will cause the RPMs to increase and will keep the car running. If the pedal is released, the RPMs will quickly drop, and the vehicle will stall. Sometimes, depending on how badly the idle air control valve is clogged, the vehicle may run correctly when the accelerator is pressed, but then sputter or stall when decelerating.
Rough Idle
If the idle air control valve has gone bad and no longer regulates the flow of air into the engine, typically due to the IAC being stuck open, the vehicle will idle roughly. A rough idle is characterized by shaking, vibrating and shuddering while the car is on but not moving. A rough idle due to a bad intake air control valve will eventually result in stalling immediately after starting the vehicle.
A bad idle air control valve will prevent adequate air flow to the engine and will result in increasingly lower RPMs when idling. The number of RPMs, while idling, will vary a bit based on the individual vehicle but is generally considered low when below 800 RPM. The RPMs will increase to normal levels when the accelerator is pressed.
Stalling
As the air control valve becomes increasingly clogged, the engine RPMs, while idling, will continue to drop until the vehicle stalls. This problem can usually be identified by applying the gas. When the vehicle is about to stall, pressing the accelerator will cause the RPMs to increase and will keep the car running. If the pedal is released, the RPMs will quickly drop, and the vehicle will stall. Sometimes, depending on how badly the idle air control valve is clogged, the vehicle may run correctly when the accelerator is pressed, but then sputter or stall when decelerating.
Rough Idle
If the idle air control valve has gone bad and no longer regulates the flow of air into the engine, typically due to the IAC being stuck open, the vehicle will idle roughly. A rough idle is characterized by shaking, vibrating and shuddering while the car is on but not moving. A rough idle due to a bad intake air control valve will eventually result in stalling immediately after starting the vehicle.
Thanks for posting that up!
Better then how I would explain it! Plus I just saw this!
I drove it yesterday. I fired it up and let her run. No rough idle at any point. Before I took off, I used a can of starting fluid to spray down some of the hoses and around the engine to see if there are any vacuum leaks. No issues. I drove it down the road about a half mile and came back. I didn't want to go too far in case it stalled out. Nothing happened. So when I get some time I will change filters and fluids and check grounds. I don't want to replace parts unless I know they are defective.
01-15-2016, 02:05 PM
Maybe you should check the fuel pressure yourself ..
