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.

new dizzy problems

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Old 07-06-2009, 04:09 PM
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chaotic50
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Default new dizzy problems

Ok so i got a sum 850411 dizzy installed and timed at 10degrees and the car stumbles under load and above 2500-3000 rpm... kinda feels like it may be plug wires i kinda messed with them a little bit (they are msd and not sure if once they are on they pretty much cant be messed with) i spoke with summit tech and they said maybe the ignition control module??? i just had a previous problem with car stalling after running for 15-20 mins... the dizzy stopped that.. thanks guys for the help on that one! and any help on this thanks in advance. timing is curently set 12 degrees but same problem.




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My car dies after about 15-20 mins of running... no matter if i am just idleing or if i am crusing i have no idea what the problem is.. and it usualy wont restart for about an hour or maybe longer and then again the same thing dies in a matter if mins... i was told it might be the ignition control module overheating... but i have since replaced it with the same result... please help.. this started happening shortly after cold air intake and headers were installed.. smog pump was also removed and an idler put in place... timing is at 13degrees and the cap and rotor are msd and also new as are the plugs and wires..
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Old 07-06-2009, 07:53 PM
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FivePointOhh
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Sounds like ICM issues. Common on these cars
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Old 07-07-2009, 01:47 PM
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chaotic50
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the icm is new with the dizzy... but i have a spare so i will try it to rule it out!!! anyone else have any ideas.. i will let you know if that works!
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Old 07-07-2009, 01:54 PM
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when you crank it, does it crank quickly with no fire? or slowwww crank?(after it shuts off when its warm)
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Old 07-07-2009, 08:32 PM
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chaotic50
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just wanted to say thanks.. you were right... icm replaced and summit is refunding me the difference that i spent at local parts place. pretty cool of them i think! again thanks for the help! she is running like normal!

Bobby
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Old 07-07-2009, 09:41 PM
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no prob man. small parts like that sometimes are crap from the factory. t-stats, starters, solonoids, ICM's, stuff like that is common to be junk out of the box. not always...but it happens. glad you got her fixed
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