Originally posted by psifactor
Yeah, like the 4g63 has a good rep for not breaking. 
Have you changed check the fuel filter and spark plugs like Dizin suggested? Most likely that will fix your problem.
Cant think of anything on mine that broke that I didnt directly cause........
I think you'll find people have more problems with the 420A, I cant think of one person that owns a 420A and hasnt replaced the headgasket and many other parts.
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1989 Toyota Supra Twin Turbo -FOR SALE!!
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1997 Mitsubishi Eclipse GST
Mods: AGP L2R, victoy performance 2.5" O2 housing with 40mm External wastegate, Denso 660's, IRC Race FMIC, 2.5" intercooler piping, 3" dejontool intake, BBK 255lph fuel pump, Blitz Dual turbo timer, Greddy profec B, Stillen 3" downpipe , 3" Tanabe Racing Medallion exhaust, Greddy type S BOV, Apexi EL EGT, Apexi EL Boost Gauge, translab shift kit, alto end clutch, Eibach pro kit, tokico illumina shocks, HKS 264/272 cams, 1G head swap, RRE SS valves, crower titanium retainers, crower valvesprings, mitsu 3 layer metal headgasket, DSMlink, ARP rod bolts, ARP head studs, Aeromotive AFPR with stainless braided lines and B&M gauge, stainless oil feed line with inline filter, gay vitek plug wires, RRE catch can, thin fans, and much more.