Senior Member
hey guys,
After modifying the engine with 8 rib belt and pulleys, a 10% od crankshaft pulley , and a smaller pulley on the supercharger, I keep getting the random misfire code. Ive not retuned with Marty yet.. soon.
Could the larger crank pulley w/o a tune be the cause of the code?
Ive not heard or felt a misfire.
Thanks
-KK
'03 Silver Birch. Rebuilt 4.L 32V DOHC, V7-JT blower w/ADTR racing supercharger kit, Shift kit in transmission, stainless works long pipes and cat backs, Ridetech coil-overs front, shocks in back (ADTR kit). Rebuilt calipers, upgraded front rotors, OEM Mercury wheels, [boost, oil P, WB fuel/air, and fuel pressure] gauges. Build duration was Dec 2019 to Mar 2022. Upgraded to 8 rib belt to reduce slip, July-Nov '23. Car broke during tune with Marty Feb '24. Running again May '24. Still needs tune.
Senior Member
Certain parts of the tune adapt and others don’t. It just depends on what your knock margin is and how much risk you’re willing to take. The increase in air flow is easily handled if you have the fuel system capacity. Either way get it retuned start there.
2003 300A Black MM
FRPP ALUMINATOR MOTOR 10:1Originally Posted by magindat
BC AUTOMOTIVE TRANNY 2800 STALL
TRILOGY S/C WITH POSI PERFORMANCE PORT
STAINLESS WORKS LT HEADERS
METCO REAR CONTROL ARMS AND WATTS LINK
ADDCO FRONT & REAR SWAY BAR
MONROE HD QUICK STRUTS FRONT
QA1 ADJUSTABLE REAR SHOCKS
EATON LIMTED SLIP DIFF:FORD RACING 4.10'S
DUAL AEROMOTIVE 340LPH PUMPS, 40AMP BAP, WITH DUAL FPDM'S
ZACKS BIG BRAKE SWAP w/ TCE SS LINES
SCANGAUGE MONITORING....^....^....^
ALL SECURIED WITH A VIPER SECURITY SYSTEM REMOTELY STARTED BY MY VIPER IPHONE APP
Senior Member
ok, retune is scheduled for sept 17 w/marty & jeff.
what is the “risk” you are mentioning ?
thanks for the input
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'03 Silver Birch. Rebuilt 4.L 32V DOHC, V7-JT blower w/ADTR racing supercharger kit, Shift kit in transmission, stainless works long pipes and cat backs, Ridetech coil-overs front, shocks in back (ADTR kit). Rebuilt calipers, upgraded front rotors, OEM Mercury wheels, [boost, oil P, WB fuel/air, and fuel pressure] gauges. Build duration was Dec 2019 to Mar 2022. Upgraded to 8 rib belt to reduce slip, July-Nov '23. Car broke during tune with Marty Feb '24. Running again May '24. Still needs tune.
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