|
|
1990 Ford Thunderbird 3.8L Supercharged
|
|
|
|  |
|

chubbard
New User
Oct 31, 2006, 3:28 PM
Post #1 of 3
(2903 views)
|
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

Oct 31, 2006, 3:36 PM
Post #2 of 3
(2901 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

Nov 1, 2006, 4:10 AM
Post #3 of 3
(2900 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
|
|
|  |
|