NickBA-XR6T Bronze Donating Members 386 Member For: 12y 9m 20d Posted 28/12/12 10:04 AM Share Posted 28/12/12 10:04 AM OK so I have done:Spark plugsCoilsFuel filterFuel regulatorThrottle bodyChecked for vac leaksReset ECUO2 sensor with genuine NTKI cannot find a reason for my bad idle which consists of a constant miss. Can anybody suggest anything else I am all out of money and patience.RegardsNickAnd the throttle body was a complete replacement with TPS. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 3m 8d Gender: Male Location: Perth Posted 28/12/12 10:06 AM Share Posted 28/12/12 10:06 AM bent rod 1 Link to comment Share on other sites More sharing options...
NickBA-XR6T Bronze Donating Members 386 Member For: 12y 9m 20d Posted 28/12/12 10:27 AM Author Share Posted 28/12/12 10:27 AM I was thinking injector issue over bent rod? It is stock boost can't imagine a bent rod. Link to comment Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 5m 4d Gender: Male Posted 28/12/12 10:32 AM Share Posted 28/12/12 10:32 AM Could be injector, carbon buildup on valves, bent rod, jumped timingFord can do a cylinder balance to identify which cylinder it is or you can unplug coils one at a timeA damaged piston/headgasket/valveseat can also cause this Link to comment Share on other sites More sharing options...
BigAl's04 Special needs member. Bronze Donating Members 690 Member For: 14y 3m 25d Gender: Male Location: gold coast Posted 28/12/12 10:41 AM Share Posted 28/12/12 10:41 AM Triple post= Banworthy 1 Link to comment Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 5m 4d Gender: Male Posted 28/12/12 10:48 AM Share Posted 28/12/12 10:48 AM Lol my mate jack is slowing my brain Link to comment Share on other sites More sharing options...
BigAl's04 Special needs member. Bronze Donating Members 690 Member For: 14y 3m 25d Gender: Male Location: gold coast Posted 28/12/12 10:51 AM Share Posted 28/12/12 10:51 AM As long as he's a Gentleman. 1 Link to comment Share on other sites More sharing options...
BRK Member 361 Member For: 13y 18d Gender: Male Location: Perth Posted 28/12/12 12:07 PM Share Posted 28/12/12 12:07 PM Nothing cheap to check anymore. I assume you have checked all clamps etc? You can start the T with the air intake off it (remove the cross-over and just have the throttle body exposed) That eliminates the turbo, and associated pipes - cooler - and air system. Start it but Don't rev it up. If it still misses, we get down to an injector or a head gasket as a next step. A compression test is where I would go first. That is not money badly spent because you will then know what the engine is like. After that, (if no good)- to the dealer and they should be able to advise which cylinder is "lost."Good luck - {my idle issue was a plug and a coil....... naturally they were not on/in the same cylinder so it was plugs/coils/........... clean throttle body is regular servicing.} Link to comment Share on other sites More sharing options...
old_mate Member 767 Member For: 18y 10m 18d Gender: Male Location: Brisbane Posted 28/12/12 12:46 PM Share Posted 28/12/12 12:46 PM Has it spat out any codes? Were the replacement coils genuine Ford? Link to comment Share on other sites More sharing options...
NickBA-XR6T Bronze Donating Members 386 Member For: 12y 9m 20d Posted 28/12/12 08:14 PM Author Share Posted 28/12/12 08:14 PM The codes were lean bank 1 which a genuine o2 sensor fixed and idle air control under speed so I replaced the throttle body. Having the codes reset today. Still didn't fix my idle though. I'm thinking it may be a bad injector.The engine has only done 125,000 and under load it seems to go well. The fuel consumption is up around 16.8l/100 which is high considering I don't thrash it everywhere. I doubt its a head gasket as no oil in the water or water in the oil etc. My gut tells me its a manifold leak should I have someone do a smoke test on it? Link to comment Share on other sites More sharing options...
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