Community Fixes
Common problems grouped from confirmed-fix threads on SupraForums — 572 issues across MKIII threads
Systems
All Issues572Engine162Electrical143Other60Cooling42Body / Interior39Suspension35Transmission28Turbo20Fuel System15Brakes15Exhaust13Sort by:Most DiscussedSystem
Engine10 threads
rod knocking sound heard at multiple RPM ranges
FUCK! (engine problems)Well, she's dead... what do I do??Can someone give a positive diagnosis: video+ 7 more threads
Engine10 threads
needs oversized crankshaft thrust bearing
Bad News From Machine Shop(Didn't see this coming)CPS internal oil seal part numberhelp ordering toyota rod/main bearings+ 7 more threads
Engine10 threads
turbo bypass valve not opening enough at high throttle
High idleno compresson on built motor?Stock Bypass Valve Vs. Aftermarket BOV. Please Help+ 7 more threads
Cooling10 threads
bare wire found near coolant temperature gauge
7mgte heater core hookupreplacing thermoPlug ID.+ 7 more threads
Engine10 threads
difficulty installing ARP head studs
what sizelost nutNeed quick answeer please...+ 7 more threads
Engine10 threads
idle speed control valve check valve replacement
Idle contro air valveISCV Check Valve and Seal (grommet) Same as MK4?ISC problem im pulling my hair out over.+ 7 more threads
Engine10 threads
running lean at idle and cruise
Stubborn 7mgte - lean idleVPC Nightmare need HELP!!!!Lex AFM and 550cc Inj. Running Lean?+ 7 more threads
Brakes10 threads
intermittent loss of brake pedal pressure
help brake problemNo brakes, Holy shit!!!! just purchased MK3who here know our hydrolic brake? my car dont stop...no more brake...+ 7 more threads
Electrical9 threads
wiring compatibility for aftermarket seats
I feel like giving up guys:(Mk3 Manual Turbo Wiring HarnessJDM 89+ Tails+ 6 more threads
Electrical9 threads
gauge adapter modification for cluster
LOTECH is the absolute worstClock and Cluster modifications projectGauge lights burn out, i cant search yet so please help me.+ 6 more threads
Electrical9 threads
air conditioning compressor mounting issue
1990 MK3 7MGE - AC Compressor Bracket Removal7mgte a/c compressorCannot attach airccon compressor to the block (7MGTE)+ 6 more threads
Transmission9 threads
mid shaft bearing failure
Clutch Slave Cylinder - Is mine broke? or can i put this back inTURBO and N/A ALTERNATORs INTERCHANGABLE???Why can't I find a release/slave cylinder?+ 6 more threads
Engine9 threads
incorrect coolant hole thread size on CHRA
What size adapter is needed for Oil Presure Sender?7mgte oil feed fitting.fitting for installing oil pressure and oil temp gauge?+ 6 more threads
Engine9 threads
unknown engine firing order
Wrong firing order?? what the hellFiring order....HELP what the fireing order+ 6 more threads
Engine9 threads
disintegrated valve cover material
valvecover boltsValve cover bafflesMy valve cover bolt snaped!!! what to do?+ 6 more threads
Engine9 threads
engine failure after removal
pulling motor, quick questionthe last piecea340e removal+ 6 more threads
Engine9 threads
difficulty removing oil filter
How do i get the oil filter off???Oil filter stuck real good need helpCan you please look at this.. Fuel pump filter issue??? (Pics inside)+ 6 more threads
Engine9 threads
harmonic balancer replacement needed
Harmonic Balance Bolt BROKE!!!Crankshaft pulley removal..1986.5 MK3 Supra "Harmonic Balancer/Damper"+ 6 more threads
Cooling9 threads
idling issues related to coolant temperature sensor
Coolant temperature sensor questionWheres to splice into water temp?supra questions+ 6 more threads
Cooling9 threads
broken electrical wire at thermostat housing
BVSV BrokenRemove Thermostat Housingwhere is the thermostat located???+ 6 more threads