How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Tim West Your Own Question
Tim West
Tim West, ASE Certified Technician
Category: Ford
Satisfied Customers: 4638
Experience:  ASE Certified Service manager of Firestone
9949505
Type Your Ford Question Here...
Tim West is online now
A new question is answered every 9 seconds

1997 Ford Expedition: really rough..lean..a gasoline smell as well

Resolved Question:

My 1997 Ford Expedition has been running really rough. I had the Valvoline person hook it up to the computer and the errors came back "running lean" and "misfiring". Now I've started to smell a gasoline smell as well. Any ideas about what the problem could be??
Submitted: 6 years ago.
Category: Ford
Expert:  Tim West replied 6 years ago.
Chat Conversation Started
Tim West :

Thanks for visiting Just answer

Tim West :

Do you know what codes are stored?

Tim West :

p0171, p0174 and what else?

JACUSTOMER-kwuvqlny- :

I don't know anything except the two I mentioned. The check engine light has been on, and it definitely has problems accelerating (that's when it gets really rough). My problem is that it's an old, gas-guzzling vehicle, and I need to figure out how much to put into it in order to sell it, or whether I should just donate it. 222,000 miles.

Tim West :

Well this might be an easy fix.

Tim West :

(donate it to me)

Tim West :

Jk

Tim West :

This truck is common for lean coedes.

Tim West :

When the mass air flow sensor gets dirty the vehicle throws lean codes and the vehicle runs bad

Tim West :

(usually)

Tim West :

You should simply try removing and cleaning the mass air flow sensor.

JACUSTOMER-kwuvqlny- :

Easy to do??

Tim West :

A vacuum leak is also common, so make sure to have the tech check for vacuum leaks.

Tim West :

To remove the MAF it's pretty easy.

Tim West :

It's located right next to the air filter box.

Tim West :

Air goes through the mass air flow sensor, the sensor tells the computer how much air is going in to the engine and the engine compensates .

Tim West :

let me get you a pic

Tim West :

what size engine?

JACUSTOMER-kwuvqlny- :

That would be great if it was something easy and cheap! I'll check those two things -- the Valvoline tech also mentioned spark plugs??

JACUSTOMER-kwuvqlny- :

V8??

Tim West :

Um, there are 2 V 8's

Tim West :

4.6 and 5.4

Tim West :

1 sec

JACUSTOMER-kwuvqlny- :

I think 5.4

JACUSTOMER-kwuvqlny- :

Sorry - it's not my car, originally. My daughter got it from her dad, and she's the primary driver....

Tim West :

all good

Tim West :

they are similar

Tim West :

click here

Tim West :

Be sure to use special electrical cleaner or mass air flow sensor cleaner you can get at the parts store.

Tim West :

This is probably going to fix the problem and cost you next to nada.

Tim West :

As far as spark plugs

Tim West :

Not a bad idea if they are due.

JACUSTOMER-kwuvqlny- :

Thanks -- I think Valvoline replaced the air filter.... and I'll look into the other cleaners, and the spark plugs. Do you know, is there a way I can save this info, if I'm not currently on my home computer??

Tim West :

Um...

Tim West :

If you can email the link of this page to yourself it would be easiest

Tim West :

http://www.justanswer.com/questions/410dq-my-1997-ford-expedition-has-been-running-really-rough-i-had

JACUSTOMER-kwuvqlny- :

Thanks, XXXXX XXXXX I'll give it all a try!

Tim West and other Ford Specialists are ready to help you