p3m3o3 Posted December 25, 2008 Share Posted December 25, 2008 I had this problem with my 2.5L before I had the head rebuilt and engine. Put in new fuel pump with sending unit,new injector,fuel filters. Engine misses and blows black smoke, and every once in a while will smooth out and run better. Have about 1200 miles on rebuilt engine. Gets really crappy gas milage too, about 10 mpg! Dist. cap and plug wires new, new plugs--Distributer contacts get a whitish buildup on them after several miles, new Rotor also. Help this is driving me crazy!!!!!!! :doh: :wall: Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 25, 2008 Share Posted December 25, 2008 Black smoke is indicative of a fuel problem...as in way too much fuel being delivered. May be a bad injector... Link to comment Share on other sites More sharing options...
p3m3o3 Posted December 26, 2008 Author Share Posted December 26, 2008 Replaced the injector already, anybody have any thoughts about the choke? Or maybe a bad Distributor? Before rebuild eventually plugs started fouling. :doh: Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 26, 2008 Share Posted December 26, 2008 Just because you replaced it doesn't mean that it can't be bad :idea: . It has happened many times. The fuel injected engines don't have a choke ;) Could be a timing issue as the 2.5L (unlike the 4.0L) has a tensioner on the timing chain that does go bad and allow the timing to get way out of wack. Link to comment Share on other sites More sharing options...
p3m3o3 Posted December 29, 2008 Author Share Posted December 29, 2008 That tensioner is a definate possibility and is a something I don't think was replaced. Thanks for a great suggestion. Also injector was actually replaced 3 times before I got a good one! I think I'm going to rename you Comanche Genuis!! :clapping: Link to comment Share on other sites More sharing options...
bigd44889 Posted December 29, 2008 Share Posted December 29, 2008 mine did that when it was rebilt after al the normal stuff u look for we found the manifold bolts never got torx and 2 came out and i ended up with 2 burnt valves and head gasket cheak compreson and do vacume leak down Link to comment Share on other sites More sharing options...
p3m3o3 Posted December 30, 2008 Author Share Posted December 30, 2008 I actually was there for the Head and Manifold and torqued bolts my self and saw the rest done so I know they are Ok. I looked at that tensioner and it was worn and stupidly didn't replace it. Was in a hurry to get her done! I now live on a boat in a marina so working on truck is problematic, but I will get her done when no one is looking and weather permits!! Link to comment Share on other sites More sharing options...
bigd44889 Posted December 31, 2008 Share Posted December 31, 2008 were u live in marina at Link to comment Share on other sites More sharing options...
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