Cold start

[Raptordude]

About a month ago, my crank position sensor quit on me and left me sit. After popping a new one in, it seems like it is taking a little longer to start up on a cold start. I mean it doesn't take long, but it used to be instant. Now it cranks for just a little bit before starting. On a cold start I always let the fuel pump prime, and I just replaced the battery about a month ago. Any ideas? I'm not saying anything is wrong, just wondering what may have caused this.

 

 

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[Colossus]

Is it a Delco branded sensor that you replaced it with? Also how old is the vehicle battery?

[Raptordude]

No I did not get the AC delco crank position sensor. The battery is only 3-4 weeks old

 

 

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[Colossus]

Ok. My thinking on this is that different branded crank sensors will have different parameters in which they measure, which will in turn result in a different reading being sent to the ECM and thus the longer (or sometimes shorter) crank cycle, depending upon the model of the sensor. Is it just a half a second longer or drastically longer cranking? If it's not too long I wouldn't be worried. The old 4.0L inline 6 that was famous in the Jeeps from the 80s and 90s would crank for almost 3 full seconds, sometimes longer. And then there was my 99 Silverado which would only need 1 second every time. Except for when the battery got low or worn out.

[Raptordude]

Ok thanks. And yes it's just a half a second longer than normal. I'm just real picky about my truck, so it's something I noticed. Thanks again!

 

 

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