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Pontiac Sunfire SE: The Cylinder On The Far Right ( If Looking

The Cylinder On The Far...
The Cylinder On The Far Right ( If Looking At It From Front bumper) Wont Fire. It Has Spark And The Spark Plug Is Black So It HaS Fuel.
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Answered in 14 minutes by:
7/23/2013
ClayA
ClayA, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 116
Experience: Ten years experience, ASE Master and Advanced Level Specialist certifications. 2006 Winner National Ford/AAA Student Auto Skills
Verified
Just going to ask a few basic questions to get up to speed on what you have going on here.
Do you have a misfire code for the number 4 cyl (P0304)?
Is the plug wet and black or dry and black?
What was the result of the compression test?

You could have a leaking injector causing the cylinder to receive too much fuel. You could confirm this by swapping the number 4 injector with one of the other injectors. (Say swap inj. 4 and inj. 1) Then see if the problem moves to the other cylinder that you swapped with. This would let you know if it was an injector problem.
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Customer reply replied 4 years ago

Have Not Checked Codes, Dry And Black,.And From Left To Right From Bumper Compression Is 95 95 95 115

The specification for compression is 100psi. So I don't see a problem there. Just kinda odd for the affected cylinder to be 115psi (20psi more than the others). This further leads me to believe that the injector may be leaking. A wet cylinder will have more compression than a dry one.
ClayA
ClayA, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 116
Experience: Ten years experience, ASE Master and Advanced Level Specialist certifications. 2006 Winner National Ford/AAA Student Auto Skills
Verified
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ClayA
ClayA
ClayA, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 116
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Experience: Ten years experience, ASE Master and Advanced Level Specialist certifications. 2006 Winner National Ford/AAA Student Auto Skills

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