G.F.Y racing president
Join Date: Apr 2005
Location: philly, pa
Vehicle: 2005 dodge magnum rt
Modifications: Cold air intake.
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first things first, as mentioned, check the plenum. if that does look ok. then i would do new one step colder plugs, (mainly in the back for us v8 guys), and also get the 180 thermo. ive done this with my 96 ram years ago. worked like a charm. ram had the m1, 24lb injectors, performance computer too. still did it but light. once i did the thermo swap it got better, then when i read up on the back two cylinders mainly causing the pinging, i swapped out the back two plugs for ones that were a heat range colder, pinging stopped. also did a run-rite additive through the truck while it was running...works similar to the seafoam.
while i had the truck in that configuration, i got 23-24mpg out of it too. truck worked so well, i didn't even need high test in the tank. i think i ran 89 all the time in the ram. wish i could do it all over again, id add gears in the rear, take out the 24lb inj, and put in 21's. id also go with the rt+10 can, with the roller rockers in it, and then work the heads, bet the mileage would be a tick or two better after all that.
changing them all to a one step colder plug wont hurt nothing though.
1997 dakota, 5.2v8, msd wires, trans cooler, K&N cai, 1.6 rr's, stinger 1700 battery, updated big 3. aeroturbine 3030 muffler, high flow cat. conv