Engines runs rough when first started but after 10 minutes runs f

Radiator cooling fans not working? The ECM is protecting the engine by shutting it down.

Engine Stalling Due to Mass Air Flow/Crankshift Position ...

repairpal.com > Problems > Buick > Park Avenue
Buick Park Avenue Engine Stalling Due to Mass Air Flow/Crankshift Position Sensor Failure. This is a verified ... 1997 Buick Park Avenue- 3.8L V6160,000Visitor. Engine stalls ... car runs then stalls and won't start for thirty minutes. Upvote (36).

Buick stuttering Questions & Answers - Fixya

www.fixya.com > Forum > Tags > stuttering
94 Buick Park Avenue that stutters under a light load I have a 94 Buick Park Avenuethat ... Buick Century 97 runs rough and stutters when cold and gas applie Engine runs rough ... I have a 1994 buick lesabre it starts ok but stutters and stalls.

I would ck the cooling system, sensor, head gasket etc. Is any oil getting in the coolant or visa versa?

sounds like auto matic choke problem try a manual choke

change the fuel filter and check the fuel pressure

Do it three times in a row.

1. Perform a security system relearn.
2. Let the vehicle sit for more than 10 minutes with the key off.
3. Attempt to start the engine, leave the key in the run position monitoring the security system indicator.
4. After 10 minutes, the security indicator will change state.
5. Turn the key off and wait 10 seconds.
6. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.
7. After the second 10 minute timer has expired, turn the key off for 10 seconds.
8. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.
9. After the 3rd 10 minute timer has expired, shut the key off for 10 seconds.
10. The security system will relearn on the 4th starting attempt and the engine should start and run.

Here is a link about the security problem

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Im assuming you are refering to the anti theft security key relearn process.

1. Perform a security system relearn.
2. Let the vehicle sit for more than 10 minutes with the key off.
3. Attempt to start the engine, leave the key in the run position monitoring the security system indicator.
4. After 10 minutes, the security indicator will change state.
5. Turn the key off and wait 10 seconds.
6. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.
7. After the second 10 minute timer has expired, turn the key off for 10 seconds.
8. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.
9. After the 3rd 10 minute timer has expired, shut the key off for 10 seconds.
10. The security system will relearn on the 4th starting attempt and the engine should start and run.

If that doesnt work, look into this link http://vatspasslockpasskeysecurityhelp.yolasite.com/

1. Perform a security system relearn.
2. Let the vehicle sit for more than 10 minutes with the key off.
3. Attempt to start the engine, leave the key in the run position monitoring the security system indicator.
4. After 10 minutes, the security indicator will change state.
5. Turn the key off and wait 10 seconds.
6. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.
7. After the second 10 minute timer has expired, turn the key off for 10 seconds.
8. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.
9. After the 3rd 10 minute timer has expired, shut the key off for 10 seconds.
10. The security system will relearn on the 4th starting attempt and the engine should start and run.
If this doesnt work, you may have a failure in your system. If the security light is on, and the reprogram doesnt work, you might want to look into bypassing that antitheft system.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

1. Perform a security system relearn.

2. Let the vehicle sit for more than 10 minutes with the key off.

3. Attempt to start the engine, leave the key in the run position monitoring the security system indicator.

4. After 10 minutes, the security indicator will change state.

5. Turn the key off and wait 10 seconds.

6. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.

7. After the second 10 minute timer has expired, turn the key off for 10 seconds.

8. Attempt to start the engine. If the engine stalls, wait another 10 minutes with the key on.

9. After the 3rd 10 minute timer has expired, shut the key off for 10 seconds.

10. The security system will relearn on the 4th starting attempt and the engine should start and run.

If this doesnt work, and you are having STARTING issues, go to this link.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

You need new timing belt and gears. Buicks gears are made of plastic, and become a big glob. Nothing for the timing belt to grab onto.