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Car blowing white smoke out the intake and wont start ideas repairs?

Tiny
MIKEYMIKE101
  • MEMBER
  • 1996 JEEP GRAND CHEROKEE
  • 250,000 MILES
My 1996 grand cherokee laredo straight 6 4l was running at one point. My sister borrowed it ran it hot and left it on the side the road for a long while. Recently went and got it. When I try to crank it the starter turns but the engine wont catch and start. Everyonce in a while the engine will blow a white smoke out the top of the engine. Me not being mechanically inclined what would be causing this and what can I do to fix?
around 250000 miles
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Sunday, February 19th, 2012 AT 6:11 PM

1 Reply

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
It sounds like the engine lost compression which can happens when overheated, lets do a compression test to see if the engine is okay, here is a guide to help.

https://www.2carpros.com/articles/how-to-test-engine-compression

if the compression is okay lets try removing the exashut from the catalytic converter, it could be plugged

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please go over these guides and report back.
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Sunday, February 19th, 2012 AT 6:19 PM

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