454 mag problem
08-06-2005, 10:40 AM
#1
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454 mag problem
Its only running on like 4 or 5 cylinders, we've already checked all of the obvious, it happened all the sudden and compresion is fine, any clues?
08-06-2005, 11:06 AM
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Re: 454 mag problem
fuel or spark?
Check rotor/ cap for arching isolate dropping cylinders.
I had a problem with the shift interupt micro switch causing to shut down cylinders
Check rotor/ cap for arching isolate dropping cylinders.
I had a problem with the shift interupt micro switch causing to shut down cylinders
08-06-2005, 07:21 PM
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Re: 454 mag problem
MPI, could both of you guys elaborate, because I did have a broken injector and a nuetrel saftey switch go bad, which is wired around right now
08-06-2005, 07:24 PM
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Re: 454 mag problem
only 92 hours also, we just had a head rework from a valve seat issue and now this?????? 6 weeks down and counting, there goes the summer
08-06-2005, 08:01 PM
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Re: 454 mag problem
Need more info!
What year? VST or Cool Fuel?
Did the problem start immediately after reassembly from head work? Or did it run fine for a few hours, then developed a new problem?
Did you check for trouble codes?
What does "checked the obvious stuff" mean?
Have you checked fuel pressure?
Which cylinders are missing?
Dave
What year? VST or Cool Fuel?
Did the problem start immediately after reassembly from head work? Or did it run fine for a few hours, then developed a new problem?
Did you check for trouble codes?
What does "checked the obvious stuff" mean?
Have you checked fuel pressure?
Which cylinders are missing?
Dave
08-06-2005, 08:18 PM
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Re: 454 mag problem
2000
cool fuel
It all happened at the same time, dropped a valve seat
plugs, wires cap, rotor all checked
fuel pressure 42-43
Im not sure which cylinders, but can find out tomorow
cool fuel
It all happened at the same time, dropped a valve seat
plugs, wires cap, rotor all checked
fuel pressure 42-43
Im not sure which cylinders, but can find out tomorow
08-07-2005, 10:25 AM
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Re: 454 mag problem
I just got back from the shop and he said the shift micro shuts down 4 cylders to shift into gear and if I wired around the nuetrel saftey switch it is probably stuck in that mode, what do you think, we are trying to fix that now
08-07-2005, 10:33 AM
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Re: 454 mag problem
is it a Merc or Omc if Merc alpha or bravo?????? if alpha it has a shift interruptor if bravo it does not. only Omc shuts indv. cyclinders Merc grounds the coil for a milisecond.
Last edited by GOODT; 08-07-2005 at 10:36 AM.
