Member
Intermittently my car sort of cuts out almost like it’s dropping cylinders after I get on it hard. It also wants to surge at idle during deceleration. I have an 03 with a cobra engine and a Paxton Novi. It’s pushing a little over 630hp. It was tuned by Mo. previous to this issue or would act up and completely die. It’s had the coils recently change with a new MSD set. it doesn’t die anymore (yet) but acts up how it did before when it used to die. Any ideas ?
Member
No codes when I scan with my SCT
Junior Member
Possible vacuum leak.
2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
2003 marauder black 28,000 miles all stock. Garage Queen.
2004 marauder red daily driver.
I'm Your Huckleberry
Yes, vacuum leak. The diaphragm in you bypass/blow off valve is ripped or torn. You can either replace the diaphragm or replace the entire valve assembly.
You "feel" the difference because you want to "feel" the difference. Since you just spent money on the upgrade you "have" to feel the difference
I'm looking to eliminate the double pump process I have to follow right now to get the pedal hard
2004 300A Procharger #0010 D1X
2003 300A Procharger #0017 D1SC (SOLD. Last I heard, it was in Washington State)
Member
Thanks for the leads gentlemen. I did find a few significant vacuum leaks for the Bov hoses. I’m from 12 to 20 inches at idle.. hopefully this is my fix. Will test tomorrow.. don’t want to piss off the neighbors. The bov diaphragms were good but I’m glad I took them apart because they really needed a cleaning.
Member
Issue was a bad O2 sensor. fuel was dumping into the cylinders on the right bank. A new sensor fixed the issue.
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