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Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 15577
Experience:  Have owned a repair shop for 25 yrs.
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shuts off then will start and stop again. ongoing problem.

This answer was rated:

shuts off then will start and stop again. ongoing problem.

tims auto repair :

what is the year ,make and model?

tims auto repair :

explain you problem

Customer:

1994 Buick Regal 38oo engine. Car starts,drives short distance,shuts off but will start up again and maybe run a short distance and shuts off again. Runs longer when car is cold but still has problem after warming up. I have worked as a mechanic for 28 years,this has me stumped.

tims auto repair :

ok

tims auto repair :

from the way you explain

tims auto repair :

it sounds as if you have a bad crank sensor

tims auto repair :

these will do this when they go bad,,,and most times,not give a code

tims auto repair :

 
















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RH Side Of Engine



tims auto repair :

 








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Crankshaft Sensor Positioning


 








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Special Tool; Assembly





REMOVE OR DISCONNECT

1. Serpentine belt from the crankshaft pulley.
2. Raise the vehicle on a hoist.
3. Right front tire and wheel assembly.
4. Right inner fender access cover.
5. Using a 28 mm socket, remove the crankshaft harmonic balancer retaining bolt.
6. Crankshaft harmonic balancer using tool J 38192 or equivalent.
7. Sensor electrical connector.
8. Foreign object deflector.
9. Sensor and pedestal from block face.
10. Sensor from pedestal.

INSTALL OR CONNECT:

1. Loosely install the crankshaft sensor on the pedestal.
2. Position the sensor with pedestal attached on special Tool J 37089.
3. Position the special tool on the crankshaft.
4. Bolts to hold the pedestal to the block face, torque to 20-40 Nm (14-28 lb ft).
5. Torque the pedestal pinch bolt to 3-4 Nm (38-40 lb in).
6. Remove special tool J 37089.
7. Place the special tool 37089 on the harmonic balancer and turn. If any vane of the harmonic balancer touches the tool, replace the balancer assembly.
8. Balancer on the crankshaft.
^ Apply thread sealer (GM(NNN) NNN-NNNN or equivalent to the threads of the balancer bolt.
9. Torque the crankshaft bolt to 140 Nm + 56° (104 lb ft + 56°).
10. Foreign object deflector.
11. Electrical connector.
12. Inner fender shield.
13. Tire and wheel assembly, torque to 140 Nm (104 lb ft).
14. Lower the vehicle.
15. Serpentine belt.

tims auto repair :



Customer:

Ok. I will try that. They are a problem to fix but sounds like it may help. can I get back to you and let you know if it works?

tims auto repair :

yes

tims auto repair :

just sign in a reply back to this question

tims auto repair :

i have seen this many times

tims auto repair :

the car will run great until it gets hot

tims auto repair :

then,,just die as if the key was turned off

Customer:

can I print your answer and info?

tims auto repair :

then,,after it cools a little

tims auto repair :

it will restart as if nothing is wrong

tims auto repair :

yes

tims auto repair :

please print

tims auto repair :



Customer:

Thanks, XXXXX XXXXX in touch.

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