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You'll need to provide more information with your question, before I can possibly provide an answer. How did you determine the cylinders #1 & #8 are misfiring? Did the "Service Engine Soon" light come on? If so, have you connected an engine diagnostic reader to read the trouble code(s)? As you may knwo, your local auto parts store can loan you the diagnostic reader, and assist you in reading the code(s).
What else can I help you with?
What causes misfire in cylinder for 2000 Toyota Avalon?
What causes misfire 302, 304 and 306
What causes a misfire in cylinder 3 in a 2000 Chevy blazer?
a bad coil or plug to be safe change both
What is code P0300 Random Misfire Detected P0302 and P0303 on a 2000 Toyota Tundra?
Random misfire, cylinder 2 misfire, and cylinder 3 misfire. see related question below.
What does Code 0p300 on a 2000 Malibu mean?
random/multiple cylinder misfire!
How much does it cost to fix a engine cylinder misfire on a 2000 mercury mystique?
The exact cost to fix an engine cylinder misfire on a 2000 Mercury Mystique will depend on the exact type of engine it has, but can cost around $1,000.
2000 Buick lesabre has p0301 code?
Cylinder Number 1 Misfire Detected
What do the troubleshooting code po301 for a 2000 grand am mean?
Cylinder 1 Misfire Detected
2000 ford explorer code PO304?
Code P0304: Misfire at cylinder 4 detected.
What does the message P0302 Check Engine mean in a 2000 Dodge Dakota?
Cylinder #2 Misfire
What is P1399 code for 2000 Honda Odyssey?
A P1399 code is a cylinder 1 misfire code
Where is cylinder 5 on a 2000 ford expedition 4.6liter?
drivers side of engine , front cylinder
Misfire on cylinder 2 2000 Pontiac Grand Am?
Most commonly a bad plug or wire. If not that, then coil.
