i have a chevy c1500, i just changed the rotor cap and button sparks plugs and wires! and now my truck is tryin to kick over and wont! what could be the cause?


Asked by Jan 03, 2015 at 03:24 PM about the 1998 Chevrolet C/K 1500 Cheyenne Extended Cab LB

Question type: Maintenance & Repair

10 Answers


If it was running fine before the tune up, retrace your steps. Double check that the spark plug wires are hooked up to the correct spark plugs. It's easy to transpose them. I've done it. HTH. -Jim


I agree with Jim I have also done that. Also if you have one wrong you will have 2 wrong. Edd

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Best Answer

You also may have installed the wires in the wrong rotation. Looking at the cap, if looking clockwise the firing order is 1,8,4,3,6,5,7,2. You may have wired it counter clockwise 1,8,4,3,6,5,7,2..I've done that before until I learned to replace the wires one wire at a time.


What would cause it too smoke or back fire??


so its not sounding like its outta time? its not sounding like the timing chain?'


To check if it's jumped timing, run a compression test. If all cylinders test low it's jumped timing. HTH. - Jim


Why would it jump time tho? It was fine before i did a tune up besides i got bad gas


Does this motor have a lot of miles on it? I once had a '68 Cadillac jump timing on me while waiting for a traffic light. It was idling smoothly and just stalled. Wouldn't restart. Just cranked and cranked. Had it towed home and and did the usual tests for spark and fuel. I had both so I ran a compression test. All 8 cylinders tested below 100 PSI. Normal was 180 PSI or better. So I knew that it had jumped timing. The car had just over 150,000 miles on it. Parts wear out. Usually at the most inconvenient time! Run the compression test if you have spark, fuel, and know for sure that the spark plug wires are hooked up correctly. Then you'll know for sure. HTH. - Jim


You test the timing chain for stretching by rotating the crankshaft clockwise using a wrench on the balancer pulley bolt 1 rotation ( to take up any slack in the chain) until the timing mark on the balancer lines up with the '0" on the timing grid. Take off the distributor cap, and start rotating the crankshaft counterclockwise until the distributor rotor just starts to move, then stop turning the crankshaft. Now see where the timing mark on the balancer is pointing to. Anything over 8 degrees on the grid means that the timing chain has stretched enough that it should be replaced. I still contend that the wires were installed incorrectly.


Yes, that is another way to check for a jumped timing chain. You can also check by using a timing light while cranking. I agree as well that incorrectly installed plug wires are a strong possibility here. Hopefully we'll find out the results. -Jim

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