2000 Blazer No start and Locate timing disconnect??
#31
03-07-2014, 12:48 PM
Just wanted to say I Love this Site. THANK YOU to all who replied with help. I got it running smooth Now. Last done was repalce cap /rotor AND I had a bad wiring connection in the Spyder connector -- New All have to do is get my Heat working. Think its a vacum switch
#32
03-07-2014, 03:47 PM
Here's a good link to check out concerning the vacuum switch (for 3 button 4x4). GMC Sonoma & Chevy S-10 Transfer Case Vacuum Switch
#33
06-21-2014, 10:22 AM
One thing that could throw you for a loop on the timing, is if the outer ring on the vibration dampener has slipped on the hub. This is an image of a generic dampener, the black ring is rubber. It can deteriorate and allow the outer part of the dampener to slip, which causes the timing marks to be off however far it slips. Check it closely for cracks etc, they have been known to slip on this engine.
Just an FYI on this, the oil cooler lines are routed fairly close to the dampener, and they are known to leak oil, (very common problem, as in, eventually they all leak). If enough oil gets on the rubber ring, it will deteriorate, and the outer ring can slip.
Just an FYI on this, the oil cooler lines are routed fairly close to the dampener, and they are known to leak oil, (very common problem, as in, eventually they all leak). If enough oil gets on the rubber ring, it will deteriorate, and the outer ring can slip.
#34
06-21-2014, 04:47 PM
Joey1986Z,
If the outer ring totally breaks loose from the hub it could damage the timing cover and or crankshaft position sensor, that's the only "danger". The marks on the outer ring are only used for locating top dead center on cylinder #1. They are not used for ignition timing, which makes a timing light worthless on this engine. Ignition timing is viewed on a scan tool, and is not adjustable.
The crankshaft position sensor generates a pulse for the PCM when each piston is at top dead center. The PCM calculates what the ignition timing needs to be. It sends a pulse to the ignition control module, which in turn fires the ignition coil. After the crankshaft position sensor relearn has been performed, ignition timing is correct, whether the distributor is installed or not. When the distributor is installed correctly, (no P1345 in memory) and camshaft retard is within spec, the distributor can send the spark to the intended cylinder. If all this stuff is correct, and P0300 through P0306 are set, none of this is the cause of it.
If the outer ring totally breaks loose from the hub it could damage the timing cover and or crankshaft position sensor, that's the only "danger". The marks on the outer ring are only used for locating top dead center on cylinder #1. They are not used for ignition timing, which makes a timing light worthless on this engine. Ignition timing is viewed on a scan tool, and is not adjustable.
The crankshaft position sensor generates a pulse for the PCM when each piston is at top dead center. The PCM calculates what the ignition timing needs to be. It sends a pulse to the ignition control module, which in turn fires the ignition coil. After the crankshaft position sensor relearn has been performed, ignition timing is correct, whether the distributor is installed or not. When the distributor is installed correctly, (no P1345 in memory) and camshaft retard is within spec, the distributor can send the spark to the intended cylinder. If all this stuff is correct, and P0300 through P0306 are set, none of this is the cause of it.
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