Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









1990 Ford Thunderbird 3.8L Supercharged


Search for (search options)
 



chubbard
New User

Oct 31, 2006, 3:28 PM

Post #1 of 3 (2835 views)
post icon 1990 Ford Thunderbird 3.8L Supercharged Sign In

I have a 1990 Ford Thunderbird that has an intermittent engine lope. After the engine warms up it starts this problem. I have taken it to two dealers, two independents, and a transmission shop. No one can identify the problem or even give an educated guess. Any ideas??? It sounds like a failing oxygen sensor to me, but nothing shows up on computer diagnostics.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 31, 2006, 3:36 PM

Post #2 of 3 (2833 views)
Re: 1990 Ford Thunderbird 3.8L Supercharged Sign In

Guess 4U: Vacuum leak that would be covered up if minor when engine is cold as it's running richer until warm, T



steve01832
Veteran
steve01832 profile image

Nov 1, 2006, 4:10 AM

Post #3 of 3 (2832 views)
Re: 1990 Ford Thunderbird 3.8L Supercharged Sign In

The older Ford's are famous for this: Unplug the Mass Airflow Sensor connector, the coolant temp. sensor, the air temp. sensor, and the throttle position sensor.
Check the inside of the connectors for a green or white corrosion. If you find this, clean out thoroughly and reconnect. Ford has had bad connections due to this problem for years. Also, if you have a scan tool, you can perform a "wiggle test" to check for broken wires and bad connections.

Steve






 
 
 






Search for (options) Privacy Sitemap