backfiring

[pitoturbo]

just replaced timing chain double checked for timing marks, tried to start now it went BOOM!!! took valve cover off to check if tdc w/both valve close everything looks good/check cam sensor set is correct,what would be my backfiring problem need help

 

[Adrian87]

We were pretty sure we had the cam sensor in correctly, had same problem, reinstalled it 180* and fired right up...just a suggestion..worth double checking it..

 

[pitoturbo]

going to try turning it 180 see what happens,what else can i try looking at

 

[.38 special]

did you have the coil pack off at any time?

 

[10SECONDVSIX]

Cam Sensor Signal.....Nothing else

 

[pitoturbo]

the coil was off, i did lifters,springs i doudle check firing order,coil pack connections, i check the cam sensor position put to t d c - then 24 deg, took the sensor cap off the window is facing down to driver side fender is this correct the engine is already preprime 70 psi with the drill weel sould i just turn the sensor 180 around?

 

[pitoturbo]

the coil was off, i did lifters,springs i doudle check firing order,coil pack connections, i check the cam sensor position put to t d c - then 24 deg, took the sensor cap off the window is facing down to driver side fender is this correct the engine is already preprime 70 psi with the drill weel sould i just turn the sensor 180 around?

 

[U1ARUNIT]

If you can follow the procedure that Gene offered just turn it 180* around and see how it is.

 

[.38 special]

The reason I asked about the coil pack is:
When I changed my timing chain and put it all back together I was getting the same thing with the backfires. I looked all over everything for like two weeks-going over everything all to no avail. Until I noticed on another car that the 2,4,and 6 wires were on the front of the coil pack. A very reputable tuner (not gonna mention their name) had put my coil pack on top of the module backwards when testing the module. I put the wires back on according to the little numbers on the pack-so it was all backwards. It's something simple to check--it sure would be nice if it was this, huh.

 

[pitoturbo]

got it running guys!!!! CAM SENSOR 180 OFF thanks for all the help. but i have another problem i have an oil leak between timing cover/oilpan!! i think the gasket roll in installing the front cover that SUCKS MAN. other than that no leaks so far, so my next project is rear main seal,leaking anyway how hard to do the job,again thanks for all the help!!!! pete.