Question about 1990 Chevrolet Celebrity
Posted on Dec 13, 2009
I believe it is 45 thousandths on a spark plug gapper. But some plugs run as high as 65. So i would ask the place that I bought them from to tell me what the correct gap is.
Posted on Dec 13, 2009
The spark plug change is very straight forward. Basically, you remove the plastic valve cover trim panel, unplug the harness plugs from each of the ignition coils, remove the two nuts securing each coil, pull the coil up. The rubber spark plug connector boot should come up with the coil. You can now remove the spark plugs.
The spark plugs are not gappable. Install them as they come out of the box.
Replace the rubber connector boots at the same time, these wear out and can cause miss-fire problems.
Note that if you find oil in the spark plug wells, the valve cover gaskets must be replaced. Not only does this make a mess, but it deteriorates the boots and also causes miss-fires.
See the DIY article in the Spring 2005 issue of the Bavarian Autosport - Fast Times newsletter (see link below):
Contact Bavarian Autosport for the spark plugs and connector boots (and valve cover gaskets) at 800-535-2002, or order online.
Posted on Sep 03, 2009
you may have a bad coils or coil boots in those cylinders, try switching the coils to a good cylinder and see if the codes change to the other cylinders, if they change then replace the coils, the computer see it drawing more cuurent so it thinks its the plug because its not misfiring or completly grounding out.
Posted on Aug 20, 2010
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If you're replacing the spark plugs in your car
engine, you'll need to set the gap before reseating the
spark plug. The gap is the distance electricity arcs between the ground
electrode and center electrode. The gap must be set correctly to ensure
maximum performance. Here's how to set the gap of a spark plug.
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