5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Starter relay?

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Old 06-07-2009, 02:16 PM
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jd4x426@yahoo.com
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Default Starter relay?

First off ive been having trouble starting my 94 GT it was hit and miss sometimes it would start and sometimes it wouldnt but only when cold so i checked a bunch of stuff and then i replaced the starter relay but my question is would a starter relay allow the car to crank but not fire any help would be appreciated i just want to make sure this was the problem
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Old 06-07-2009, 03:20 PM
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Joel5.0
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Nope.... the starter relay only controls starter on/off state.
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Old 06-07-2009, 05:21 PM
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yea thats what i thought must have been a coincidence
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Old 06-07-2009, 07:08 PM
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mjr46
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when the prob occurs if it still cranks but won't start, check for spark and fuel
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Old 06-08-2009, 04:37 AM
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i already tried that my fuel pressure is 32 and i have spark but it is weak when cranking i think that is my problem just cant figure out why ive replaced the coil ,plugs,wires,and stator and cleaned all the sensors timings set at 12*it rruns fine when it starts and only gives me trouble on cold start
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Old 06-08-2009, 06:30 AM
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Suggestion.... try to spray a little carb cleaner in the TB before you do a cold start + you may want to run the DIY KOEO/KOER self tests. LUK
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Old 06-08-2009, 07:29 PM
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ok il try that thanx
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Old 06-09-2009, 05:52 PM
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i rechecked my fuel pressure today along with the codes then i replaced my o2 sensors that was the only code so no more check engine light but i noticed that my fuel pressure wont hold it went up to 28 then dropped right down if i understand correctly it should hold for a little then i tryed cycling the key to try and build up pressure and it fired right up so im thinking its either the fuel pump or possibly a regulator any ideas

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Old 06-09-2009, 06:00 PM
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Confirm the cause when the condition is present..... don't throw $$ at a problem w/out being 100% sure it will fix it........ just a thought.
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Old 06-09-2009, 06:07 PM
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well when i try and start it on the first key turn it wont start then i tried cycling the key and it fired right up then i tied to start it again later on with one turn and no go then i cycled the key again and it started up so it has to be fuel related either the pump or the regulator just not sure on how to narrow it down the guy that owned it b4 me said he replaced the pump 10000 miles ago
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