1999 Buick Century Enginge stalls after driving 5-10 miles

Tiny
TERRY P
  • MEMBER
  • 1999 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
I have checked for codes no codes had one coil with corrosion on tip I replaced the coil all wires and plugs seems to run better but still stalls after driving awhile very hard to restart can hear it kind of blowing back through intake at times
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Monday, April 26th, 2010 AT 9:01 AM

11 Replies

Tiny
RASMATAZ
  • MEMBER
Hi Terry P, Welcome to 2carpros and TY for the donation.

Do you hear the fuel pump come on every time you turn the key On? If so check the fuel pressure and get back with the readings we start here.
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Monday, April 26th, 2010 AT 3:17 PM
Tiny
TERRY P
  • MEMBER
Yes I have checked fuel pressure and regulator both checked good I let the car run until it shut down with the pressure gauge on pressure was good even when cranking had to wait a couple minutes before it would start you can hear it kind of blow back so I assume I have spark also just not a proper one
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Monday, April 26th, 2010 AT 4:39 PM
Tiny
RASMATAZ
  • MEMBER
When it shutsdown look for spark immediately do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark?
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Monday, April 26th, 2010 AT 4:43 PM
Tiny
TERRY P
  • MEMBER
I removed a couple wires I am getting a good blue spark before I removed the wires it did blow back through the intake
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Monday, April 26th, 2010 AT 6:20 PM
Tiny
RASMATAZ
  • MEMBER
Check and test the camshaft and crankshaft sensors to include an actual fuel pressure check
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Tuesday, April 27th, 2010 AT 12:35 AM
Tiny
TERRY P
  • MEMBER
Is there a way to check them I have is a snap on obd2 scanner and are both of them easy to get to to change on a 3.1 I don't have a hanes for the car
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Tuesday, April 27th, 2010 AT 9:17 AM
Tiny
RASMATAZ
  • MEMBER
Its not an easy task it requires time due to their location

The CMH is on top front of engine below intake plenum and CPS is at right side of engine, below exhaust manifold-sorry no pic for location
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Tuesday, April 27th, 2010 AT 11:21 AM
Tiny
TERRY P
  • MEMBER
I don't have any way to test either of the sensors neither are very expensive the crank sensor says it may need to be relearned are both easy to replace?
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Thursday, April 29th, 2010 AT 7:25 PM
Tiny
RASMATAZ
  • MEMBER
REMOVAL PROCEDURE


http://www.2carpros.com/forum/automotive_pictures/12900_camshaft_8.jpg



Turn OFF the ignition.
Remove the serpentine drive belt.
Disconnect the sensor electrical connector.
Remove the attaching bolt.
Remove the sensor.
Inspect the sensor for wear, cracks or leakage if the sensor is not being replaced.

CPS 7X

REMOVAL PROCEDURE


http://www.2carpros.com/forum/automotive_pictures/12900_crk1_1.gif



Turn OFF the ignition.
Turn the steering wheel fully to the left.
Raise vehicle on hoist. Refer to Vehicle Lifting in Service Precautions.
Disconnect the electrical connector.
Remove the retaining bolt.
Remove the sensor from the engine.
If the sensor is not being replaced inspect for the following:
7.1. Inspect the sensor for wear, cracks, or leakage. Replace the O-ring if necessary.
7.2. Lubricate the new O-ring with clean engine oil before installing

CPS 24X

REMOVAL PROCEDURE


http://www.2carpros.com/forum/automotive_pictures/12900_crk2_1.gif



Turn OFF the ignition.
Remove the serpentine drive belt from crankshaft pulley.
Raise the vehicle. Refer to Vehicle Lifting in Service Precautions.
Remove the crankshaft harmonic balancer retaining bolt.
Remove the crankshaft harmonic balancer.
Note the routing of sensor harness before removal.
Remove the harness retaining clip (3) with bolt (4).
Disconnect the sensor electrical connector.
Remove the sensor bolts (2).
Remove the sensor.

http://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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Friday, April 30th, 2010 AT 12:56 AM
Tiny
TERRY P
  • MEMBER
I replaced the Ignition Module and the CPS and the car seems to be running fine fine thank you for your help with this problem
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Wednesday, May 5th, 2010 AT 9:41 AM
Tiny
2CARPROS LINSEY
  • MEMBER
Thank you for using 2CarPros. Com. We appreciate your donation and look forward to helping you in the future.
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Wednesday, May 5th, 2010 AT 12:10 PM

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