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post #1 of 11 (permalink) Old 08-20-2018, 12:13 PM Thread Starter
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Tensioner replacement now p0016 code

What did I do wrong? Took out the old tensioner and put a new one in, whacked the rail through the top of the cam cover to release it as all the directions state. Whole job seemed pretty straightforward. It did take a couple seconds for the rattle to subside after starting it, assuming it had to build pressure and fill the tensioner. However, no alarming noises or anything. I changed the oil while doing this too (and the engine sat without oil for a few days).

Seems to be running okay, idling maybe a little rough, but I haven't taken it on the road. I also got a p0302 misfire on startup, but does not seem to be recurring.

Timing chain slip maybe? Happened to anyone before?
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post #2 of 11 (permalink) Old 08-20-2018, 01:57 PM Thread Starter
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update: car wont start now.
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post #3 of 11 (permalink) Old 08-21-2018, 10:53 AM
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Does it turn over? Are there any new codes?


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post #4 of 11 (permalink) Old 08-21-2018, 11:00 AM Thread Starter
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Thanks robo - does turn over...no ugly valve/piston sounds or anything and not throwing any codes since I cleared the p0016/p0302, so I'm somewhat hopeful I'm just going to open the top back up, check it out and pray my guide rails are still intact. At this point, figuring ill have to retime it in the very least.

Not my first rodeo with timing chains, but this isnt the car I was expecting to do it with!
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post #5 of 11 (permalink) Old 08-21-2018, 03:20 PM
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If you have no noises...check ALL of your grounds and make sure they're good. A bad ground...even the ones up by the headlights...can cause a problem like this. Just ask @skersfan...


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post #6 of 11 (permalink) Old 08-22-2018, 02:36 AM
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As Robo says, grounds on these cars are more important than any I have ever seen.

My Mallett set for three days with every angle/dangle and gremlin we could think of checked, re done over and over. Turn over, no fire, would not start. Connected the driver side ground for the head lights and the damned thing fired right up. The whole engine wiring harness was grounded and everyone in the car, but the front bumper was off. Some very high end mechanics had egg on their face when the High Speed wireless tech said he bet it was a ground. So I listened to him and after lunch we went in and hooked things up. Passenger side headlight ground and the windshield wipers started working, had no idea they were turned on, some thing else started working, then I just touched h loop to the frame and whoosh, rumble rumble rumble and everyone there, about 6 of us were grinning ear to ear. Trust me it did happen and can happen to you.
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post #7 of 11 (permalink) Old 08-22-2018, 10:25 AM Thread Starter
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I'll check the grounds, but I've just been over them a month or two ago (chasing and solving misfire) so they've all been cleaned and tightened recently. P0016 is cam/crank correlation, would be a pretty nasty coincidence if the root cause was a ground after changing the tensioner.
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post #8 of 11 (permalink) Old 08-22-2018, 01:33 PM Thread Starter
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Double checked the grounds, the car started but idled rough today. No codes. I think the timing slipped a tooth but it stays running. The fuel pump "click" goes haywire rather than the nice rhythmic/repetitive click it normally does, so it's definitely struggling with timing (also smells rich). I am relieved it started again today and ran for a bit, so no catastrophic damage.
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post #9 of 11 (permalink) Old 08-23-2018, 03:47 PM
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It could be you had a slightly bad ground and another issue but it sounds like you're right when you say timing issue based on the other problems you're having now that the engine starts. Just a lot easier to check grounds than it is to reset the timing chain. LOL


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post #10 of 11 (permalink) Old 08-24-2018, 08:59 AM
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@Rockchops, you might want to take a look at this post. He was/is rebuilding his engine, but got the same p0016 result as you. His debugging and fix here:

Twincharged Solstice = Turbocharger + Supercharger

Owner of "Campbelle", a Brazen 2008 GXP ... with mods piling up...
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post #11 of 11 (permalink) Old 08-24-2018, 11:51 AM Thread Starter
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Thanks TS! I've been lazily following that thread (really impressive build) but great timing...no pun intended.
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