Running like crap

[Blockbeata09]

You say a new coil aswell.. was it a stock one or an msd like the distributor? Alot of people on here had issues with using the msd coils on our trucks... they got a stock replacement and all was well again....

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No the coil was stock

 

[Blockbeata09]

Was the misfire code P0300?

Was the relearn procedure run after the crankshaft position sensor was replaced?

After the distributor replacement, was the cmp retard adjusted (0 degrees +/- 2 at 1000-1200 rpm)?

How does the rubber seal on the MAP sensor look? Wondering if you could have a vacuum leak or leaking EGR valve--I think you'd need a scan tool to verify if it is functioning correctly.

Are you losing coolant (lower intake gasket leak)?


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I reset the PCM by leaving the battery disconnected for a little over a hr. I was thinking about checking out the map first to see if it's seated correctly

 

[jw_96]

Funny thing about that, the pre-vortec engines worked great with the MSD coils, Vortec's and LS hate them... figure that one out....

I got MSD on my vortec 350 lol runs like a champ

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[Blockbeata09]

Just swapped back out for the old distributor and no check engine light?

 

[east302]

Did you change the cap back to the old one as well?


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[Blockbeata09]

Did you change the cap back to the old one as well?


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Yea direct swap and its running fine lol

 

[east302]

So it's either the MSD cap/rotor or their distributor?

Out of curiosity, does the MSD use a metal housing where the cap screws go?


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[Blockbeata09]

So it's either the MSD cap/rotor or their distributor?

Out of curiosity, does the MSD use a metal housing where the cap screws go?


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Yes it does