No start in cold

LIZ4RD

MEMBER
2000 PONTIAC BONNEVILLE
3.8L
V6
2WD
AUTOMATIC
212,600 MILES

Hi, my car wont start in cold temperatures. I have replaced the fuel pump, fuel filter, mass airflow sensor, idle air control valve. It spits and sputters while cranking but wont start. If I crank on it long enough it will start (i don't like doing this because it is hard on the starter). When running it runs great and if the motor is warm it will start again only when it is cold and been sitting for a day. Any suggestions? I thought it would of been a fuel issue.

3 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

This could be a problem with your crankshaft position sensor. I have included a few links for you down below.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Go through them and get back to us with what you find out.

Thanks,
Alex
2CarPros

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Sunday, March 3rd, 2019 AT 7:19 PM

LIZ4RD

MEMBER
32 POSTS

Hi, I read through all of the links and it seems something to look at but the links are saying that the sensor goes bad when it is hot and will work when cold. My problems are the opposite. It runs fine warm but when cold its difficult to start.

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Sunday, March 3rd, 2019 AT 7:27 PM

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello again,

Here is what Pontiac has to say on the issue. I have included the information in the diagrams down below. Please go through it and get back to us with what you find out.

Thanks,
Alex
2CarPros

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