CAM and crank position sensor replacement failed to remove negative battery cable from battery, now it will not start

CAK1969

MEMBER
2005 NISSAN FRONTIER
4.0L
V6
4WD
AUTOMATIC
200,000 MILES

I have replaced both cam sensors and crank sensor. However, I failed to remove negative battery cable from battery. Now, I get engine turnover but no start. What could have gone wrong? Thanks for your help in advance.

Wednesday, March 13th, 2019 AT 3:18 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
108,310 POSTS

Welcome to 2CarPros.

Honestly, if the key was off, you should be fine. However, it is recommended to prevent power surges to the control modules. Have you checked to see if your getting spark to the plugs? Here is a link that shows how to check:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Do this and let me know the results.

Joe

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Wednesday, March 13th, 2019 AT 7:36 PM

CAK1969

MEMBER
2 POSTS

Yes, I am getting spark, but it barely fired one time but not enough to start it. BTW, the key was in ACC mode for a little while when the O2s and cams and crank sensors were being replaced. What have I done? Worry's me, scratching my head.

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Thursday, March 14th, 2019 AT 2:09 PM

JACOBANDNICKOLAS

MECHANIC
108,310 POSTS

The accessory position wouldn't have allowed power to get to the ignition. Tell me, is the spark a good hot blue snapping spark or is it more orange or white?

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Thursday, March 14th, 2019 AT 5:40 PM