Question about 1999 Chevrolet Blazer

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Changed spark plugs in my 1999 chevy blazer and it wont crank over. Gapped the plugs to specs...should I've also changed the wires, cap & rotor also?

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When you go to an auto store and they give sell you spark plugs they should already be gapped to spec. There is no need to adjust the gap. This may be the reason your car will not start. I would try new spark plugs first then wires. Since the vehicle is a 99 it probably could use a tune up (spark plugs, wires, coils, cap, rotor, chassis lube, and transmission fluid check and flush if needed). Also make sure that the engine block ground strap is in good condition and that there is no corrosion covering the ends of the ground strap. The ground strap is typically located near the firewall and is directly attached from the engine block to the frame of the car.

Posted on Mar 11, 2011

  • Steve Allison
    Steve Allison Mar 11, 2011

    While at an auto parts store- You might want to buy a cheap digital multimeter (under $20 US) which would let you measure the state of not only your ignition wiring but also is very handy for troubleshooting electrical problems in the car as well as home. You can also get them much cheaper still on eBay but the transit time from China can be weeks. Typical resistance-type ignition leads (plug or coil) should measure between ~4,000 to ~12,000 Ohms and I flex them to make sure they are not broken inside.

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