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Hi rpm on grand chrokee

Just replaced my head on my 2000 grandcherokee when I start it revees up 4000rpm

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  • Jeep Master
  • 4,521 Answers

Probly got a vacuum leak some where--inspect job again--may need a compression test to confirm--are bolts torqued rite-can warp a head if not

Posted on Jul 28, 2013

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Posted on Jan 02, 2017

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SOURCE: Head Bolt Torque for a 2000 Grand Cherokee Laredo 4.0L

the torque is a 4 step process

1 torque all bolts to 22 ft/lbs
2 torque all bolts to 45 ft/lbs
3 recheck all bolts to 45 ft/lbs
4 torque bolts 1 thru 10 to 110 ft/lbs
bolt 11 to 100 ft/lbs
bolts 12 thru 14 to 110 ft/lbs
bolt #1 is the fourth bolt from the front on the passenger side....#2 is the fourth bolt on the drivers side then you continue in a clockwise order

Posted on Jan 04, 2009

  • 1 Answer

SOURCE: Ford Expedition knocks at low RPM and misfires

SCRAP IT

Posted on May 10, 2009

csmock132
  • 4669 Answers

SOURCE: 1999 Grand Am 3400 v6 misfire.

I was asking about the pushrods because I had this problem with one of these engines that had a bent push-rod. I robbed a push-rod out of an older 3100 and it was just a fraction of an inch longer which bottomed out the lifter. I figured it out by removing the valve cover and loosing the rockers when it was running and it smoothed out. I'm guessing you checked for vacuum leaks already. How about injection pulse on the number 6 cylinder when running. Another thing you could check is running compression. You said you checked compression but did you just check cranking compression or did you check running compression too.

Posted on Apr 09, 2010

  • 2309 Answers

SOURCE: 1999 Grand Am 3400 v6 misfire.

check the egr system,

Posted on May 10, 2010

  • 1114 Answers

SOURCE: Our 97 jeep grand chrokee wont start.we replaced

pick up module located under rotor in distributor cap

Posted on May 10, 2011

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Windstar 3.8 sputters at 4000rpm's. replaced air intake sensor. replaced clam sheii gaskets and gromets. still missfires at 4000rpm;s. help.


I ASSUME THAT YOU MEAN THE INTAKE PLENIUM GASKET IF THE TUNE UP CONDITION IS NEW OR ONLY A COUPLE OF MONTHS OLD RULE IT OUT BUT I THINK YOUR PLUGS ARE OLD AND OUT OF GAP AND ONCE YOUR SPEED INCREASE'S TO THAT LEVEL RPM'S THE SPARK IS TRYING TO ARC OR JUMP TO FAR TO MAKE CONTACT CHECK THEM AND GET BACK TO ME AND CHECK THE BOOTS THEY MAAY BE CRACKED AND LEAKING + VOLTAGE TO - GROUND IN THE HEAD, ALSO YOUR THROTTLE POSITION SENSOR CAN BE WORN OUT IF YOU STEP DOWN ON THE PEDDLE AND THE RPM'S INCREASE AFTER YOU GET TO THAT SPOT THE SENSORS BAD BUT I STILL THINK YOUR PLUGS ARE WORN GOOD LUCK STEPHEN

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Looks like vacuum leaks and some sensors are not connected.
Re check everything again and tell us what happen, so that we could guide you better.
Thanks for using Fixya!

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