2002 tahoe wont start after K&N install


#1

I installed a K&N intake and filter on my 5.3L 2002 Tahoe Z71. The first thing I did was disconnect the negative cable from the battery. The last thing I did was reconnect that cable. When I turned the key the power went dead and won;t come back. Cant lock the doors - no electrical power whatsoever.


#2

Have you re-checked all the cables and connections, especially anything in the area of the intake/filter?


#3

I did. the only connection other than the negative batt. cable was the MAF connection and it is good and tight. I went out and tested the door locks and they worked (had power). I got in and tried to start it and the power went dead. I just went out and tried the locks again and they worked so I am letting it sit.


#4

I am going to guess a bad cable. They can get an internal fault. You may be able to verify that with a resistance check of each cable. It is also possible that some form of anti-theft has kicked in.

You did not ask, but I may suggest that you rethink that K&N unless you have done a lot of power modifications as K&N filters are known to kill MAFs unless they are very carefully oiled (not too much, not too little and evenly distributed). I have also seen a lot of comments about their poor filtering. Modern cars breath very well when stock and those filters will not give more power or mileage.


#5

Interesting input about the K&N. I tried to do a fair amount of research and the majority of what I found said it should help boost power and (slightly) improve mpg but I guess we’ll see. NOTE: in 42 years thie is the first american car I have owned b/c their rep was so bad. Guess I will find out for myself on both counts :-).

The right tool for the job is all I needed to fix the power problem and in this case the tool was me. Somehow when I disconnected the negative cable the positive connection was loose enough that it was not making good contact. Simple fix. I’m going back to bed.


#6

Glad to hear that was all there was to it. Watch out when oiling that filter, or if you find that it is not doing anything meaningful for you, I would put an OEM back in.


#7

I almost thought there was a great reason to avoid K&N filters. I’m kind of disappointed. Not really. The loose connection was found and that is just one more reason to add parts to a car. It sounds like the mechanic’s game of tag where the defect finds you and then you find it. Good work.