2002 Jeep Cherokee KJ 3.7L V6 Petrol Spluttering, sounding like a diesel!

[aparisella]

G'day Guys from the land down under,

My Jeep is spluttering from the back, i have checked all the coils and sparkplugs and one is cover in fuel and not black at all, i have ordered a new injector hoping this fixes the issue

Any thoughts

 

[1ino]

Do a compression check on that cylinder

 

[Johnny O]

Sounds like no spark to that plug. Normally I'd suggest swapping COPs around and see if the fault moves, but a cheapo replacement for testing purposes may be in order. Rent or borrow a code reader.

 

[aparisella]

update for all the cylinder has 0 compression, now what to do its either a valve or piston

 

[Ksat]

A rocker arm could have popped off. Remove the valve cover on that side and have a look-see. If nothing looks amiss, a leak-down test might prove useful.

 

[Xterra4x4]

G'day Guys from the land down under,

My Jeep is spluttering from the back, i have checked all the coils and sparkplugs and one is cover in fuel and not black at all, i have ordered a new injector hoping this fixes the issue

Any thoughts

Have you used a good fuel injector cleaner? Like Chevron/techron?