Steve Meade Posted July 29, 2019 Report Share Posted July 29, 2019 We have a 2010 ford edge 3.5l. I is having an intermittent start issue and throwing no codes. the battery is good, and I believe the fuel pump is fine, because it will start most of the time. it will intermittently just turn over and never fire..... seems to happen mainly when vehicle is already hot/warmed up. I thought it was my mass airflow perhaps, so I pulled it, cleaned it with MAF cleaner and still is an issue. I even just bought a replacement MAF sensor, replaced it, and then the sonofabitch started chugging and throwing codes - so I'm assuming the part I got was bad (amazon order). I've heard it could be the evap purge valve, fuel pump, mass-air-flow, and event the bank 1 or 2 sensors for the catalytic system. I took the throttle body off too, and cleaned the heck out of it (very dirty before)... NOTHING. I haven't tested fuel pressure yet - need to buy a tester, and haven't tried vacuum pressure yet - need a tester for that.. will buy both and test if necessary - just wanting some general thoughts and feedback here to perhaps help me find it... hell one day we even had to have it towed to a Goodyear Auto Center and the damned error wouldn't duplicate for them and they found nothing - of course after I suffered a tow and diagnostic fee. HELP! Thanks! Steve Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted July 30, 2019 Report Share Posted July 30, 2019 What is the cranking speed? About 150-200 rpm? Where are you located? Southern states like TX, AZ, FL? Heat kills everything ... including starters, ignition switches, sensors, key fobs/batteries, etc. It COULD be a crankshaft sensor, would have to monitor it on a scope while cranking. Quote Link to comment Share on other sites More sharing options...
Steve Meade Posted July 30, 2019 Author Report Share Posted July 30, 2019 Thanks, will check. Quote Link to comment Share on other sites More sharing options...
Steve Meade Posted July 30, 2019 Author Report Share Posted July 30, 2019 So, in your experience this can cause the problem without throwing a code? Quote Link to comment Share on other sites More sharing options...
Steve Meade Posted July 30, 2019 Author Report Share Posted July 30, 2019 And on this car there are two of those sensors, would the test identify the one having issues... Or should I replace both of them? Quote Link to comment Share on other sites More sharing options...
mvan231 Posted July 30, 2019 Report Share Posted July 30, 2019 18 minutes ago, Steve Meade said: And on this car there are two of those sensors, would the test identify the one having issues... Or should I replace both of them? You could have a pending code that hasn't met all the criteria to set the DTC to present. If it was something like a starter or alternator, you may not see a code at all 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted July 31, 2019 Report Share Posted July 31, 2019 1 crank sensor and 2 cam sensors for the 2007-10 model years. Quote Link to comment Share on other sites More sharing options...
Steve Meade Posted July 31, 2019 Author Report Share Posted July 31, 2019 Thanks for clearing it up Quote Link to comment Share on other sites More sharing options...
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