Senior Member
I've found a engine out of a 04 to use in my 03 .my question is will everything electrical be the same? Is it just plug and play or do I have to do anything to the computer? I cant seem to find any info other than the 04s had two knock sensors.
Thanks
03 black 300A # 2827 stock setup 275,000 on car. 65,000 on engine from a 04. 03 engine died at 273,000 . Rear cat delete with magnaflow 11256 mufflers.
Public Enemy #1
The only difference I remember off hand is the 04 has dual knock sensors, the 03 has one. Not a big issue in itself, and IIRC everything else should be the same.
2016 Ford Mustang GT PP - Lund nGauge, BMR vertical links, MGW Shifter, BMR CB005
2004 Mercury Marauder - Eaton M112, Billetflow 3.4, Accufab SBTB + Plenum, T-56 Magnum, 4.10s, Stainless Works LTs, 2.5" Exhaust, Borla Stingers, Ridetech Coilovers + Adj rear shocks, FX-R projectors, Wilwood 13" BNSL6 + FNSL4 BBKs, S55 Gauge Cluster
440rwhp & 406rwtq Tuned by Adam @ Revolution Automotive
2063/3214
(Sold) 2003 Mercury Marauder - Stainless Works LT's, Stainless Works 2.5" Catback, JLT Intake, Mo's Xcal4 Tune
5377/7838
2000 BMW M5 - Evolve Intake, Evolve Alpha-N tune, Stoptech ST-40 BBK, UUC SSK, Dinan front STB, Dinan RSB
1996 Ford Bronco - 4" lift, 35" BFG A/T's, Punisher Valve Body, MH1 Projectors
Turbo Marauder
It's the exact same
Senior Member
Awesome...was hoping it would be the same.
Thank you guys.
03 black 300A # 2827 stock setup 275,000 on car. 65,000 on engine from a 04. 03 engine died at 273,000 . Rear cat delete with magnaflow 11256 mufflers.
Very Senior Member
when i put the 04 engine in my 03, i just used the 03 single knock sensor wire on the 03 to the one 03 valley port. put the 04 dual wire on your shelf.Originally Posted by offroadkarter
BUCKWHEAT 03 MM 300A-August, '02 mfgr, black w/ blue metallic clearcoat, 94,000 miles, Texid stroker 5.0, #15 Kool-Aide w/ SnakeBite porting, Venom cooling, and upgraded to M122, 3873 of 7839
Senior Member
I just got the engine in and running yesterday. I used the original 04 engine harness. So far the only visable difference I found was the 04 engine had two o2 sensors on the driver side manifold and the plug in the power steering was a three wire instead of a two wire like on the 03. I'm hoping that it doesn't throw any codes from the dual knock sensors. Not sure why it would but will see when I bring the car home today.
Thanks...
03 black 300A # 2827 stock setup 275,000 on car. 65,000 on engine from a 04. 03 engine died at 273,000 . Rear cat delete with magnaflow 11256 mufflers.
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