I just installed a rebuilt 4.0 inline 6 in my 2000 jeep cherokee. And it wont start at all. It makes loud pops and sometimes there is a small amount of flames that comes out by the engine. What did I do to cause this?
Senior Member
Quote:
Sound like a timing problemOriginally Posted by Franker11
I just installed a rebuilt 4.0 inline 6 in my 2000 jeep cherokee. And it wont start at all. It makes loud pops and sometimes there is a small amount of flames that comes out by the engine. What did I do to cause this?
CF Veteran
When you installed timing chain with marks pointing towards each other was dist installed with rotor pointing to number 1 on cap?
Senior Member
Flames out of throttle body? I would check timing again. I rebuilt my engine year ago and I used the 183k mile harmonic balancer that didn't give the correct timing...
Senior Member
Quote:
Was a pita to figure that it was wrongOriginally Posted by milehigh94xj
Flames out of throttle body? I would check timing again. I rebuilt my engine year ago and I used the 183k mile harmonic balancer that didn't give the correct timing...
CF Veteran
Quote:
Top dead center compression stroke correct ?Originally Posted by Franker11
Its distributorless. But piston 1 was at top dead center and I lined up the ring thing on the camshaft position sensor.
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May 16, 2024
- Join DateAug 2011
- LocationPrescott, Az
- Posts:43,971
- Year1990
- ModelCherokee (XJ)
- Engine4.0
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Liked:1,578 Times in 1,279 Posts
Setting Your 4.0 at #1 TDC
With #1 spark plug removed, turn the engine over clockwise using the 3/4" front crankshaft bolt. You will see the degree marks on your front cover. You will see the timing mark on the balancer. Mark them with chalk or white-out. While turning the engine over, put your finger/thumb over #1 spark plug hole. As the mark on the balancer approaches the marks on the front cover, if you are coming up on #1 TDC, pressure in the cylinder will push on your finger. If there's no pressure, you're at #6 TDC and need to crank the engine over until you see the marks coming together and you get pressure. Set the mark on the balancer to the 0 mark on the front cover.
With #1 spark plug removed, turn the engine over clockwise using the 3/4" front crankshaft bolt. You will see the degree marks on your front cover. You will see the timing mark on the balancer. Mark them with chalk or white-out. While turning the engine over, put your finger/thumb over #1 spark plug hole. As the mark on the balancer approaches the marks on the front cover, if you are coming up on #1 TDC, pressure in the cylinder will push on your finger. If there's no pressure, you're at #6 TDC and need to crank the engine over until you see the marks coming together and you get pressure. Set the mark on the balancer to the 0 mark on the front cover.
CF Veteran
Quote:
Bingo ....Originally Posted by Franker11
How do I figure out if its correct?