i have a 89 xj with a new 4.0

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max98059

NAXJA Forum User

Location

Everett, Washington

• Mar 30, 2009

• #1

i have a new 4.0 in my 89 xj and yesterday i was making a right on red and it backfire out the exhaust blowing blueish black smoke out and i got it to fire up one time and it did the same thing but it was the intake. dose anyone have any advice or ideas what it could be and the motor only has 6000miles on it.

 

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winterbeater

NAXJA Forum User

Location

Royal Oak, Michigan

• Mar 30, 2009

• #2

Does it run at all now. If not, take off the distributor cap, crank it and see if the rotor is turning. The timing chain or distributor shaft could have broken.

 

M

max98059

NAXJA Forum User

Location

Everett, Washington

• Mar 30, 2009

• #3

it can run if i am lucky but it backfires thro the intake and then dies. but thank you i will double check it

 

M

max98059

NAXJA Forum User

Location

Everett, Washington

• Mar 30, 2009

• #4

ok so i went out to check to see if the rotor turns and it dose turn but it has a really had time turning over with all the plugs in. i have removed all but the first two plugs and did a compression test on 3-6 and it reads abt 140 pis and a low of 130 pis

 

joe_peters

NAXJA Forum User

Location

Grants Pass, OryGun

• Mar 31, 2009

• #5

max98059 said:

ok so i went out to check to see if the rotor turns and it dose turn but it has a really had time turning over with all the plugs in. i have removed all but the first two plugs and did a compression test on 3-6 and it reads abt 140 pis and a low of 130 pis

Click to expand...

Why not the first two plugs?

 

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winterbeater

NAXJA Forum User

Location

Royal Oak, Michigan

• Mar 31, 2009

• #6

Any chance of moisture in the distributor cap?

 

L

lawsoncl

NAXJA Forum User

Location

North Idaho

• Mar 31, 2009

• #7

joe_peters said:

Why not the first two plugs?

Click to expand...

They are harder to get to...

 

joe_peters

NAXJA Forum User

Location

Grants Pass, OryGun

• Mar 31, 2009

• #8

lawsoncl said:

They are harder to get to...

Click to expand...

As Paul Harvey would say... "And now, for the rest of the story..."

You really need to pull all of the plugs, inspect them, and rerun your compression test.

 

M

max98059

NAXJA Forum User

Location

Everett, Washington

• Mar 31, 2009

• #9

well tomorrow i will pull all the plugs out and there is no moisture in the distributor cap and the wires r new and all the senors r new

 

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max98059

NAXJA Forum User

Location

Everett, Washington

• Apr 5, 2009

• #10

so i did my compression again and number 1 is at a 110 psi and 2 is at a 100 psi 3-6 is the same

 

W

winterbeater

NAXJA Forum User

Location

Royal Oak, Michigan

• Apr 5, 2009

• #11

I consider that pretty low, but we have reliable reports of running good down to 80PSI. But that is certainly no 6000 mile motor. (unless the rebuid was FU) You do know that it should be 120 to 150.

 

M

max98059

NAXJA Forum User

Location

Everett, Washington

• Apr 5, 2009

• #12

ya i do i call the evergreen and they r looking into it

 

M

max98059

NAXJA Forum User

Location

Everett, Washington

• Apr 5, 2009

• #13

oh i forgot to tell you that it has had a random miss in it ever since i put in the new motor