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2000 Nissan Xterra rough idle

Tiny
BILLYXJ
  • MEMBER
  • 2000 NISSAN XTERRA
  • 3.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
I replaced my motor with a jy motor Wich I was told it has 72,000.I replaced timing belt, distributor, cps, plugs, wires, and put my old intake from my org motor. Having a hard time starting, and when it does has real rough idle and smokes real bad also has a really strong fuel oder around the motor with no leaks that I can find, everything was timed at tdc
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Tuesday, September 16th, 2014 AT 5:45 PM

13 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
Is the smoke black? Also, is the engine from the same year, make and model vehicle?
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Tuesday, September 16th, 2014 AT 5:54 PM
Tiny
BILLYXJ
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  • 10 POSTS
2000 xterra 3.3 6cyl 4 wheel drive. The motor is from a 02 xterra the only difference I know of is the intake. The smoke is white /gray color real rich smelling
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Wednesday, September 17th, 2014 AT 2:13 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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White smoke usually indicates coolant it getting into the combustion chamber. Are you sure the intake fit properly and sealed? Also, there could be a bad head gasket.
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Wednesday, September 17th, 2014 AT 5:01 AM
Tiny
BILLYXJ
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  • 10 POSTS
Was going to check the coolant when I get home. I hope it's not a cracked head was a pain doing that motor don't want to do it again
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Wednesday, September 17th, 2014 AT 1:22 PM
Tiny
BILLYXJ
  • MEMBER
  • 10 POSTS
Just got home cranked my truck and started smoking went to the back put my hand over the exhaust and my hand smells like fuel and had moisture on it. Also I put two gallons of gasoline in it, its only run for about an hour and I'm back on Empty again
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Wednesday, September 17th, 2014 AT 2:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Do you have access to a live time scanner? I have to be honest, moisture is normal from the exhaust. White smoke isn't. It sounds like coolant, but maybe there is an issue with something like the coolant temp sensor. If it tells the computer the temp is colder than it is, the computer will dump fuel to compensate. There also could be a leaking fuel injector. Have you checked fuel pump pressure to make sure the regulator is doing its job?

Since it is using so much fuel, I am questioning if it is running too rich. I have to be honest, a rich mixture usually causes black smoke from the exhaust.
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Wednesday, September 17th, 2014 AT 8:09 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Do you have access to a live time scanner? I have to be honest, moisture is normal from the exhaust. White smoke isn't. It sounds like coolant, but maybe there is an issue with something like the coolant temp sensor. If it tells the computer the temp is colder than it is, the computer will dump fuel to compensate. There also could be a leaking fuel injector. Have you checked fuel pump pressure to make sure the regulator is doing its job?

Since it is using so much fuel, I am questioning if it is running too rich. I have to be honest, a rich mixture usually causes black smoke from the exhaust.

NOTE: I am assuming that all the original sensors have been installed in the same locations on the new engine.
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Wednesday, September 17th, 2014 AT 8:09 PM
Tiny
BILLYXJ
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I have a scanner that goes to my phone and I only know how to get the codes Wich is throwing a knock sensor and cps. The cps is brand new and KS won't cause any of these problems, u planned in swapping my injectors from my old motor this weekend, I'll change the temp sensor tonight when I get home from work
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Thursday, September 18th, 2014 AT 2:13 AM
Tiny
BILLYXJ
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I got to thinking I put my old temp sensor on the new motor cause the other one was broken off
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Thursday, September 18th, 2014 AT 3:03 AM
Tiny
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Check to see if the injectors have the same part number. I thought you switch them.
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Thursday, September 18th, 2014 AT 5:10 AM
Tiny
BILLYXJ
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  • 10 POSTS
It's still smoking really b. Ad I'm at a loss I don't wanna put another motor in I'm ready to drive my truck again I just hope I didn't do all this work for nothing. You know of any thing else it could be
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Saturday, September 20th, 2014 AT 12:35 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Something is causing it to dump fuel. From here, it is difficult other than the things I suggested.
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Saturday, September 20th, 2014 AT 6:30 PM
Tiny
BILLYXJ
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I know it is hard with out looking at it, thanks for all the help appreciate it
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Sunday, September 21st, 2014 AT 4:34 AM

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