66jack

I have a 2010 Chevy Silverado 5.3 lt I recently did a dod and afm delete on my truck sent ecm off to have it modify for the delete well everything went good until about 2 weeks ago truck started skipping and back firing out the exhaust I had a code of p0016 which is for the crank shaft position sensor so today I replaced it and cleared code drove it light out the cut truck off and back on again and the p0016 code came on I checked wired everything seemed ok missing and back fires happens when truck is warm I checked intake for leaks with carb cleaner I have straight pipe duels on truck still have resanorators on it.can some one help

bammax

Backfire in the exhaust means fuel is going directly into the manifold. Either you're overfueling or there's no spark, or both. A bad crank or cam sensor would definitely cause a spark problem. Did you replace the sensor with a gm part? Are you sure it's plugged in all the way? Have you looked into the plug to make sure none of the wires have backed out of the connector? Are you positive that there are no breaks in any of the wires? If all of those are good then it's a head scratcher.

66jack

I replaced the cam sesor from summit which came with the new front cover and I replaced the crank shaft sensor from Auto zone I look at the connector and wires everything looked ok I guess I could ohm the wires out .but I did the delete work about 5 months ago.and the skipping just started about 2 or so weeks ago.i replace plugs and wires and coils when I did the delete and I replaced the plugs again and I ran several fuel treatment thru the fuel system.

SouthernRex

Well, in the exhaust that would be an afterfire not a backfire, but that doesn't help you at all.

jetech

P0016 - Crankshaft Position - Camshaft Position Correlation . I'm wondering if something with the ecm tuning isn't quite right

bammax

It doesn't matter where you bought the sensors. You need to check what brand they are. GM engines can be finicky with sensors and knowing what brand you have may help you rule them out or may bring you back to them being duds.

RedTRex

Either the cheaper sensors or engine jumped timing

66jack

Thanks for all the help.it jumped timing.

samckitt

iTrader: (5)

Did the P0016 error ever get resolved?

SpraydZ

iTrader: (2)

Seems like it jumped timing.

samckitt

iTrader: (5)

Thanks. I had two pages open with same P0016 code & thought i was replying to the other one.