![]() ![]() the camshaft rotates once for every two rotations of the crankshaft. Remember on a 4-stroke engine there’s two different valve configurations when the number one piston is at top dead center i.e. Hand-rotating an engine in the wrong direction can sometimes damage stuff. I don’t think all engines rotate clockwise. ![]() Forgetting to re-connect ground connections can cause this. Make sure you get a spark on each plug wire and try starting the engine in complete dark, while someone looks at the engine compartment for any flashing sparks indicating the spark isn’t going to the spark plug but somewhere else instead. There’s an off chance the spark isn’t reaching the spark plug tip for some reason on some cylinders. But I’m guessing your compression will be ok, or at least the same as it was. That’s a good opportunity to do a compression check too. Remove the spark plugs and crank the engine a few times to expel most of the liquid gas, then leave the spark plugs out for at least 24 hours, allowing any gasoline left in the cylinders to evaporate. This can create weird symptoms like this. Not an uncommon thing when diy’ers take on big jobs like this, as things get put back together and the engine cranked for testing purposes it easily gets flooded with gas. I’m not familiar with that coil configuration, but it looks unlikely the coils are a problem either, at least as far as to which cylinders they’re hooked up to. Given the configuration of the high voltage harness, it seems hard to believe the spark plugs are hooked up to the wrong cylinders. Have you checked for ECM diagnostic codes? If not, before proceeding with taking stuff apart or testing individual items, that’s the first thing to check.īeyond that, all I have is a couple of guesses. Any ideas are greatly appreciated! Really don’t want to tear it down again. Here is the video of my engine turning over. Is there a way to test them? I do have limited automotive electrical testing equipment. The cam position and crank position sensors are both hooked up. I did replace one of the coils (there are 6 independent) as the mount was broken on the old unit. You can really hear the engine struggle when certain cylinders reach TDC. I’m hoping it a ignition timing issue and not mechanical. I tried to start it up and from everything I can hear, the timing is off. Automotive work is a hobby, but this is not the most difficult procedure I’ve undertaken. The job was much harder than I had anticipated, but it went well…or so I though. All the links on the timing chains lined up perfectly with their respective marks and I checked them at least 5 times before replacing the front engine cover. I referenced both a website walk-through and the Haynes Repair Manual. I know the timing chain procedure is important and I stressed it very much. I am at my wits end with this car! I recently did a head gasket job on this vehicle. ![]()
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