Car cranks and cranks then starts weak - Mustang Evolution

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Old 02-20-2015, 05:50 AM   #1
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Car cranks and cranks then starts weak

Cranks and cranks and the starts really weak like putting sound knocking and rocking also turning key and some times nuthin happens I have to put it in neutral to start could be neutral safety switch but Idk also idle is dropping to 0 car stalls out its an auto trans the idle drop is new tho brand new iac valve new battery starter is good crank shaft position sensor replaced also thinking of the pcm fuse no check engine light is on tho
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Old 02-20-2015, 09:19 PM   #2
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Even though there is no CEL, there may still be a pending code.

I would start the diagnosis by doing a fuel pressure test.
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Old 02-21-2015, 01:01 PM   #3
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Is the IAC from Ford? The autozone ones and similar are known as problematic. I'd check that for sure.


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Old 02-21-2015, 01:18 PM   #4
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You say it makes a knocking sound? Like rod knock? and sometimes turning the key doesn't do anything? like its seized up? and when it does start its reluctant to run at all?


Check your oil for metal flake/shrapnel. It sounds to me like you seized the engine and now it sometimes will run a little bit. I could be wrong though. SOunds exactly like the first time I blew up a car engine.
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Old 02-21-2015, 02:47 PM   #5
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Naw the engine is not blow it runs and drives no metal In the oil just upon start up its very weak
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Old 02-21-2015, 02:51 PM   #6
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Car cranks and cranks then starts weak

Could be the starter starting to go...


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Old 02-21-2015, 03:50 PM   #7
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Have you changed your fuel filter lately? I know I've seen some cars spit and sputter on start up and then drive normal after pressure is built up


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