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SierrraLC9 Enthusiast

SierrraLC9

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I have almost completed an AFM delete on an 2011 LC9 w VVT. Single bolt GM cam keeping VVT. Truck was running fine other than a noise from a flat spot on a lifter roller. Truck cranks over easy. It's getting fuel, cam sensor counting correctly. 2 counts per crank rev. Counted cranking for 10 sec at 150rpm. (50 counts). Getting oil pressure Valves opening cranking over blowing out tailpipe. Checked #1 coil. Its firing. Grounds and 12V supply good to each bank of coil packs. I feel like the fire is off somehow but the cam and crank sensors appear fine. I must be missing something simple. I lost my plug adapter for compression test. But surely it had compression. Hope someone has a good suggestion. 

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chem_man Enthusiast

chem_man

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Have you tested the fuel pressure?  You might be getting fuel but are you getting enough and is there sufficient pressure to go through the injectors.

SierrraLC9 Enthusiast

SierrraLC9

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Thanks for the reply. Yes I had pressure according to the scanner. I didnt put the gauge on because I was satisfied with that and the amount on the plugs. It should have tried. I found the problem and have since corrected. My blunder but easy enough to happen if your not watching for it. Here is what I found:

 

When installing the VVT phaser I let the cam slide back enough that it didnt seat completely and the pin cam out. As I snugged the valve it turned the unseated cam until it slipped into the first oil hole in the phaser and pulled up. This advanced the valves 90 degrees (no interference). I really should have recognized immediately. We all have our moments ?. 

She is running like a top now so maybe this may help someone to be a bit more cautious than I was and double check valves. I marked TDC on the shaft and balancer after installation to make it easier.

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SierrraLC9 Enthusiast

SierrraLC9

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No problem. I had been meaning to come post. I didn't know I had a response or I would have made a point to do it last weekend. 

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