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.

what would cause these rpm fluctuations?

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Old 11-30-2009, 10:43 PM
  #11  
mjr46
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Originally Posted by Deadweight70
define trouble starting-----

basically it feels like the battery is very weak.

All of the electrical components in the vehicle work just fine. Only one time it wouldn't start on the first try. I let the car sit for about ten minutes and it refired fine.
so it is not a starting prob...it is a CRANKING problem..........make sure timing is set properly, then once that is done and prob still occurs, have battery tested and all cables associated with such checked and then finally have starter tested, high resistance will cause such issues, starter heat soak, bad connections , ect ect are all things to look at
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Old 12-01-2009, 10:33 PM
  #12  
Black89LX
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so get under the car and find your timing marks on the harmonic balancer. put a mark on the 10* BTDC line, there are marks from the factory, 0, 10, 20 BTDC. take soapscum or whiteout and mark 10*. get the timing light out, or buy one, and put the two clamps on the corresponding terminals of the battery... attach the other clip to the #1 spark plug, loosen the hold down bolt, without moving the distributor. make sure there is nothing that could get caught in the fan or belt and start the car. go to the passenger side of the engine and aim the light at the balancer. pull the trigger on the light, it will blink every time there is a spark to #1, turn the dis by the base and watch your mark move, line it up with the pointer and tighten the hold down. BE SURE TO UNPLUG YOUR SPOUT CONNECTOR before starting the car, that is how you set the base timing on your 5.0
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Old 12-01-2009, 11:30 PM
  #13  
Deadweight70
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a friend of mine who was an auto tech is gonna come over to the house and time the vehicle for me.

I did drive it around 60 miles today back and forth to work with none of the original symptoms.... not even a hiccup but I do wanna make sure the timing is correct.

after i got to work I restarted the vehicle moments after I shut her off and it restarted immediately.

hopefully the loose distributor was the cause of the majority of my problems.

thanks all for weighing in with you expertise. I appreciate the help greatly.
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