I just rebuilt my 00 mitsubishi eclipse v6 (6g72) engine. All performance parts, Pauter H-rods, Wiseco Pistons, SI valves, the whole bit. Crank and cams are original, just had them polished and blanced. The pistons were only bored .5mm...
Here is the problem; the car runs, idles a little ruff, back firing sometimes when its cold. It accelerates pretty strong until about 4 grand, then the exhaust changes pitch (gets lower) and I loose all acceleration power.
The car has a set of high flow Megan Racing headers, to a high flow cat (all O2 sensors are in the right place), to a stainless 3" catback to straight through magnaflow muffers (dual).
I am not sure why it is loosing power at this RPM, snds like its getting choked or somthing? I know its getting plenty of air from the AEM V2 intake, and i dont think its fuel...?
Is this tuning? Do I need to get some tuning software, or a Greddy e-manage system...
maybe somethings not set right or pluged in correctly i have a similer mitsubishi version of the 6g72
Scion 04-08 TC W/O CAT - 4.1 T-304 MEGAN Racing Stainless steel headers, Summit Racing Exhaust System Cat-Back 2.50 " Stainless Ford Mustang GT 4.6L Kit, DUAL 4" TIP MUFFLER STAINLESS RACING CATBACK CAT BACK EXHAUST SYSTEM 02-06 GT V6, Real Stainless Steel T-304 Made CAT Neon 95 96 97 98 99, 93-97 NISSAN ALTIMA RACING CAT CATALYTIC STAINLESS STEEL CONVERTER SE XE GLE, 95-99 NISSAN MAXIMA STAINLESS HI-FLOW RACING EXHAUST CATALYTIC CAT CONVERTER, Pypes 2005 - 10 Charger Cat-Back Systems Polished Stainless Steel Tips Race Pro , Pypes 08-10 Challenger Cat-Back Systems Polished Stainless Steel Tips Race Pro , Pypes 08-10 Challenger Cat-Back Systems Polished Stainless Steel Race Pro V6, PRELUDE BB STAINLESS STEEL CATBACK EXHAUST SYSTEM +15HPS CAT BACK DRFIT RACING, Scion tC 04-10 Race Cat less 2.5" Stainless Midpipe Mid Down pipe, PRELUDE BB JDM STAINLESS STEEL CATBACK EXHAUST SYSTEM +15HPS CAT BACK DRFIT RACE, STAINLESS 4.5" TIP CAT CATBACK RACING EXHAUST 92-00 HONDA CIVIC DX LX EX EG EK, 96-00 HONDA CIVIC HATCHBACK STAINLESS RACING 4.5" TIP CATBACK CAT BACK EXHAUST, STAINLESS RACING DOWN/TEST PIPE HIGH FLOW CAT EXHAUST 93-97 PROBE/MAZDA MX6 4CYL, STAINLESS RACING DOWN/TEST PIPE HIGH FLOW CAT CONVERTER 93-97 NISSAN ALTIMA I4, STAINLESS RACING DOWN/TEST PIPE HIGH FLOW CAT EXHAUST 00-03 NISSAN MAXIMA GXE/GL, 92-95 96-00 HONDA CIVIC 2DR 4DR STAINLESS CATBACK EXHAUST MUFFLER+RACING HEADER, 92-95 96-00 HONDA CIVIC 2/4DR STAINLESS CATBACK EXHAUST MUFFLER+RACING HEADER, 92-00 HONDA CIVIC 2D/4D STAINLESS CATBACK EXHAUST + 4-2-1 RACING HEADER, Pypes Exhaust System Race Pro Cat-Back Stainless Buick Chevy Pontiac V8 Kit, Ford Racing Exhaust System Cat-Back Stainless Polished Tip Ford Mustang 4.0L Kit, Pypes Exhaust System Race Pro Cat-Back Stainless Natural Dodge Challenger Kit, MEGAN Universal 2.25" Stainless Hi Flow Cat Catalyst HFC Converter Pipe, DUAL 4" MUFFLER TIP STAINLESS SS RACING CATBACK CAT BACK EXHAUST 02-06 GT SE V6, MEGAN RACING OE-RS CAT BACK EXHAUST STAINLESS TIPS 04-08 ACURA TSX 4DR CL9 K24A2, Pypes Exhaust System Race Pro Cat-Back Stainless X-Pipe Chevy Impala SS 5.7L Kit, MEGAN RACING CAT BACK EXHAUST OE-RS 09+ NISSAN MAXIMA STAINLESS TIPS VQ35DE VQ35, Scion 04-08 TC W/O CAT - 4.1 T-304 MEGAN Racing Stainless steel headers, Megan Racing Stainless Steel Universal Hi-Flow Cat Converter 2.25 MR-CC-225,
