No start

260,000 MILES • 4.7L • V8 • 4WD • AUTOMATIC
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JDSAUERSR
  • MEMBER
  • 9 POSTS
It overheated. It started once after that. Now won’t start. Replaced spark plugs, camshaft sensor, crankshaft sensor, oil filter, oil. Battery isn’t the greatest, four years old, but it won’t start with a jump or anything. I originally had a code for the number 7 misfiring. The spark plug was bad. I changed all of them then. Oil didn’t look like it had any coolant in it. I’m stumped. Please help.
May 14, 2019 at 7:35 PM
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SCGRANTURISMO
  • ✓Experienced Mechanic
  • 4,897 POSTS
Hello,

Okay, a vehicle only needs three things to start. 1) Spark(delivered at the proper time 2) Fuel 3) Compression. Since your vehicle overheated I'm concerned with the latter of the three, compression. I have included a few links below for you to go to:

https://www.2carpros.com/articles/symptoms-of-low-compression
https://www.2carpros.com/articles/how-to-test-engine-compression
https://www.2carpros.com/articles/head-gasket-blown-test

Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
May 15, 2019 at 3:27 AM
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