Community Fixes
Common problems grouped from confirmed-fix threads on SupraForums — 572 issues across MKIII threads
Systems
All Issues572Engine162Electrical143Other60Cooling42Body / Interior39Suspension35Transmission28Turbo20Fuel System15Brakes15Exhaust13Sort by:Most DiscussedSystem
Engine8 threads
shifting difficulty from first to second when cold
N/A stumble on start.Is my cold start injector working properly?MK 111 transmission issues+ 5 more threads
Engine8 threads
needs upgrade from MAFTPRO to standalone setup
fuel cut with maft (searched)HELP! car still wont runHow to properly clean oem MAF (CEL 31)+ 5 more threads
Engine8 threads
intermittent loss of electrical power
7MGE is feeling sluggish, sweet spot at 3600RPM is goneNAs and fuel cutno power to anything+ 5 more threads
Engine8 threads
hardened PCV hoses near throttle body
Need solution for PCV hose (7MGE)PCV Pipe and air control valveCatch can????+ 5 more threads
Engine8 threads
stuttering and stalling under boost
My car studder/skips alot while in boost...why?Please help! Currently stranded, maybe fuel issueA new respect for plugs...+ 5 more threads
Engine8 threads
bearing failure after engine wash
Wet Spark Plugs...no goahh, my car wolnt start at all, Please helpunknown 1jz issue.+ 5 more threads
Engine7 threads
thrust washer replacement
7MGTE Rebuild Questionsrebuilding r154... any suggestions?Crank Washer Dilemma+ 4 more threads
Engine7 threads
intense vibration and loss of power on startup
A Peculiar Problem: BHG? Bad Crankshaft/Bearings?loud squealing noisehelp need asap what is wrong battery, light, and tailgiht light on+ 4 more threads
Engine7 threads
normal rod bearing side-to-side play
Rod bearing play normal?Frozen Rod Bearing!!! How to get Fly Wheel off Tranny89+ and Pre 89 rods/pistons the same?+ 4 more threads
Engine7 threads
high idle speed after water intrusion
car sat throught pouring rain and now is running like shit?gallon of water in the engine; part 2Leaking Lots of Water. not AC, Car wont start? Help+ 4 more threads
Engine7 threads
leans out and shudders under load
crank pully boltDiagnose My Problem Quick Please!!!Critical Problem+ 4 more threads
Engine7 threads
forgotten engine plug locations
New guy looking to identify some cables/sensorsNeeding engine plug diagramsengine installation+ 4 more threads
Engine7 threads
low power and poor running condition
Car not having enough power, SOMETHINGs wrong.SP61 Supra dyno videoMKIII N/A Question+ 4 more threads
Engine7 threads
IAC valve failure or absence
Needing help finding a partIACV StandaloneEngien Idle HELP Please+ 4 more threads
Engine7 threads
bogging and backfiring under boost
Turbo BackfiringHmmm weird problemCould use a little more insight from y'all MKIII people :)+ 4 more threads
Engine7 threads
running rich after interior restoration
720cc whos using themneed a push!9 months and I am getting somwhere+ 4 more threads
Engine7 threads
slight pause when cold
Pushing It Too Hard???Anyone else running a 50mm tial BOV?Start up issues+ 4 more threads
Engine7 threads
ECU compatibility between regions
VPC & Aftermarket CamsAftermarket intake manifold with stock ECU?1UZ TPS on stock 7m ecu & 1jz ffi mod+ 4 more threads
Engine7 threads
piston ring installation orientation
piston rings installation...frustrated, help.JE piston locking ringsInstalling Piston On Rods+ 4 more threads
Engine7 threads
no vacuum to air flow pressure regulator
Fuel Pressure RegulatorHKS SSQV BOV Flutter FixedMAP ECU base pressure question+ 4 more threads