Driving Problems ??

[txnews]

Hello everyone, I'm having problems with the Expy. Not sure what areas to look at.
Description :
At times usually cold day or engine, it stutters not a transmission shudder but more of a running out of fuel hesitation and only upon acceleration. The problem appears to diminish after it has warmed up. It has fuel and less than 1 year ago I had the Fuel pump unit replaced. at 110K the plugs were replaced with new boots. All the maintenance has been done regularly that I can think of. It has no engine codes, original O2's sensors are still in place but don't know if this is regular service.
I only have 136,000, 4.6L, auto.
Perhaps some of you have had a similar problem and found solutions, that I may be overlooking.
Thanks for any help and suggestions.

 

[stamp11127]

There are a lot of "could be's" to what is causing your problem.
What is in your tool box as far as tools go - basic -middle of the road - entry level tech or GOD of the Chrome Plated TOOLS?

What year expy are we dealing with?

 

[Bedrck47]

1st gen 4.6 I would clean out the exhaust ports thru the throttle body. With that kind of mileage I bet they are clogged

 

[txnews]

The mileage seems to be very poor in town 9 mpg ; I recall about 12 from several months ago. I have the tools and a slightly older scanner. A
co-worker of mine stated the Coil plugs should be replaced at an interval of 7 years, this seemed a little odd to me. Although I don't know for sure.
These are the originals 1 was replaced under warranty in 2002 but I don't remember which one.
The cleaning of the throttle body, I will check in the morning.
The mileage I have is 136,000, she's a little old but we don't plan on parting my other car is far more problematic and temperamental.
I welcome any comments, thanks.

 

[Bedrck47]

You will need to remove the throttle body in order to do a proper cleaning of the exhaust ports. Should only require 2 gaskets and a can of throttle body cleaner. There are some good videos on youtube about this.

 

[98EXPnSRQ]

By exhaust ports, I think roxy is saying the EGR valve ports in the intake manifold. They are notorious for clogging up on these motors.

 

[Bedrck47]

NO I am refering to the exhaust ports that go thru the throttle body when you remove the EGR VALVE from the throttle body you will see where they are

 

[BAD RONALD]

This is the second time that the OP has been asked the model year of his Expedition.

I do not think that he knows.

 

[txnews]

Hi all, sorry for the late reply. I thought I posted the year in my 2nd response, it happens to be a 2000.
In any case I took it into the shop and explained what I wanted cleaned, they asked why; and I just explained the symptoms. It took a whole day but im very pleased with results. I don't think the price was bad 200$. It seems so free reeving and quick to respond throttle input also best of all it does not stall. Today was a cold wet morning and it didn't sputter or otherwise fell like a stall was about to happen.
Thanks for the direction guys.