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Discussion Starter #1
My car is at the tuner and we are having problems with it breaking up under boost it has good spark plugs good wires and a new cap, new injectors I can't think of what it can be any ideas will help the engine should be fine it ran perfect before
 

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I think you mean .025 , what part number/ heat range is the plug , how much boost are you running ? Do you have an MSD or other ignition box on the car ? what RPM does it break up at ?
 

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Discussion Starter #8
I think you mean .025 , what part number/ heat range is the plug , how much boost are you running ? Do you have an MSD or other ignition box on the car ? what RPM does it break up at ?
I have a MSD BTM and a MSD blaster coil, it starts breaking up as soon as it starts hitting boost im only running 10 psi. me and some friends were talking and think it could be the mass air meter, what do you think? My spark plugs are NGK's I think 14's if that sounds right
 

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I have a MSD BTM and a MSD blaster coil, it starts breaking up as soon as it starts hitting boost im only running 10 psi. me and some friends were talking and think it could be the mass air meter, what do you think? My spark plugs are NGK's I think 14's if that sounds right
but didn't on3 say the sensor they sold you should work fine with the kit as it has with ohters??
 

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have you checked for leaks on your cold section. couplings, piping? i had a leak by my innercooler and that was happening to me too. you should pressure test your cold side for starters. :)
 

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I have a MSD BTM and a MSD blaster coil, it starts breaking up as soon as it starts hitting boost im only running 10 psi. me and some friends were talking and think it could be the mass air meter, what do you think? My spark plugs are NGK's I think 14's if that sounds right
For starters make sure the BTM is set to (0) with in the calibration this should be accounted for with timing. Question? was the car all ready tuned running properly then issue occurred afterwords Or is the car being tuned now with this issue coming about. I would take a good look at what air fuel is doing at this with break up most blow through combo's need to be adjusted accordingly with fuel/timing in the right range. If you are running basic AFR/TW/Edlebrock heads I would consider standard Auto Lite 3923's they work well and for your boost level.

Edit: Stock Heads Autolite 24's one ranger colder

Chris
 

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Unplug the MSD...I have had issues with their boxes before
 
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