mothra Posted April 30, 2015 Report Share Posted April 30, 2015 it's been a little while since I drove my focus. i tried starting it a few weeks back and nothing. i figured it was bad fuel in the tank, so i removed it and place fresh fuel. i changed the oil, changed the spark plugs, changed the oil filter, and charged the battery. I go to start the car and it cranks but doesn't turn over. i spray some brake parts cleaner to hopefully get the "bad" fuel in the fuel line to combust. it did turn over for a few seconds but than killed. today i put my flasher on the computer thinking maybe it's throwing a code, sure enough it is throwing code P0602. this code says it's a failed PCM communication code. i proceed to clear the code than re-flash a tune to the PCM. it is still throwing this code and it's turning over. what options do I have to fix this? anyone encountered this code? how did you fix it? is there something else that i'm missing? if nothing changes, nothing changes You don't know what you don't know, till you don't know Link to comment Share on other sites More sharing options...
ProMaxx316 Posted May 9, 2015 Report Share Posted May 9, 2015 Do you have consistent fuel pressure when cranking? Maybe try a different key. I have seen on some cars the immobilizer somehow lost programming. When you say "re-flash a tune" do you mean like a after market tuner or stock O.E flash. There have been a few TSB's for the engine and trans needing to be re-flashed together. If it's worth building, it's worth over building. Link to comment Share on other sites More sharing options...
Jessica Posted May 9, 2015 Report Share Posted May 9, 2015 Timing belt? Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Alex K Posted July 10, 2015 Report Share Posted July 10, 2015 Well you need 3 things for a car to run... Air, Fuel, and Spark. Clean air filter? Clean throttle body? Nothings caught up inside them? What's your fuel pressure at the rails? They have kits you can attach and measure your psi to see if its in spec. I'm not sure what yours would be but there's a ton of free service manuals out there for free. You claimed you added new fuel, and changed the filter so that's good. Maybe the new fuel hasn't made its' way to the engine yet and your still trying to ignite bad fuel. What about a compression test? 2006 Nissan Z Track. My Feedback Thread i used to think a band pass was something you were around your neck or something. Link to comment Share on other sites More sharing options...
BeatBox Posted July 17, 2015 Report Share Posted July 17, 2015 maybe the fuel pump? i know on my jiimy you could hear it when turning the key half way on, when it went out it you tun the key and it wouldnt make noise Link to comment Share on other sites More sharing options...
BOSSMAN3475 Posted July 17, 2015 Report Share Posted July 17, 2015 I'm thinking fuel pump as well. To be sure I would say just take it to ford and have them do a diagnostic on it to tell you what is wrong rather than wasting more money on it. At least this way you will know for sure what is wrong. Pay them the diagnostic fee and then go change the part yourself. Link to comment Share on other sites More sharing options...
Pioneerchuck Posted July 17, 2015 Report Share Posted July 17, 2015 Obviously you start with the basics, check fuel pressure. It should be about 35-70psi continuous. Link to comment Share on other sites More sharing options...
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