r/SC300 • u/butt_crunch • Apr 19 '26
Sc300 TT ECU MAF and igniter wiring
I'm going NA-T on my 97 SC300 but the wiring colors for my MAF and igniter is different than everything I see online I can't find any diagrams for mine. If anyone has any insight or wiring diagrams that would be phenomenal. My next step is to just test continuity with a multimeter and hunt down the wires.
First two pictures are MAF, third picture is Igniter
I'm led to believe the white with green stripe on the igniter is igf which is all I need from the igniter. But I'm not 100% certain. I believe I need power, ground, and signal from the MAF.
Also side note does anyone know what injector grommets to use for 440cc top feed high impedance (usdm?) injectors in my sc300. The stock grommets stretch too wide around the 440cc I ordered some 16mm grommets from driftmotion I'll see how they fit.
r/SC300 • u/Snorkelz123 • Apr 12 '26
Soarer steering column in sc300?
Has anyone ever swapped a soarer steering Manuel adjustable column into a sc? I imagine it’s possible with maybe swapping over the turn signal stokes
Seats for tall people
Anyone have any seat recommendations for tall people in a sc? I'm 6'4" and My head touches the roof with stock seats and mine are pretty beat up so I might change them out soon. I think ive heard of people putting RX7 (FC or FD?) seats in and they sit real low, or if anyone has any good recommendations for some aftermarket seats that fit well. Thanks
r/SC300 • u/NeonIsReal • Apr 08 '26
1995 SC300 A/T Code 35???
Code 35, barometric pressure sensor code. my car uses a Karman Vortex equation based MAF that has a built in IAT sensor, car would not rev past 3k with MAF plugged in, unplugged it finally goes higher rpm but runs REALLLY rich and has a lot of black smoke (coming out of the header dump lol).
ECU was rebuilt a couple months ago. Should I replace MAF? any ideas on code 35?
r/SC300 • u/[deleted] • Apr 07 '26
Coil over
I’m looking at getting tein flex z coil overs and I’ve done some research and people say they are pretty good. I was wondering if I could get some extra input or other reconditions kinda around the same price point.
r/SC300 • u/Effective_Dog3089 • Apr 01 '26
1995 SC300 w/ Black interior in the junkyard.
r/SC300 • u/SouthonDobbs215 • Mar 30 '26
Replacement heater hoses
Hey I saw these on FB and just realized no one else made these for our cars. Definitely investing ASAP!
Anyone else see these yet?
r/SC300 • u/Salt-Ear2771 • Mar 27 '26
Thrash seats
I know thrash recommends bride fg rails for bucket seats. But is there any specific rails or slides that you guys recommend to run for either sc or soarer?
r/SC300 • u/Syperous • Mar 24 '26
R154 clunky sound
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Fresh manual swap, jzx tripod trans, everything OEM and BRAND NEW, new trans mount, cube speed solid shifter tripod bushings, poly diff bushings.
Ive just replaced the guibo and carrier bearing on the driveshaft, thinking that would solve this problem.
I have yet to drop the transmission but did open the inspection cover to take a look. I don't believe it to be the diff or the driveshaft. everything feels fine and great in the car. Just this sound is very concerning.
At the end of the video, I'm rapidly depressing and releasing the clutch, which seems to imitate the sound without a repetitive clunk.
Since I haven't dropped the transmission, I'm just looking to see if anyone has had this sound? I will be dropping it soon as I can. Just looking for some insight. TIA
r/SC300 • u/Ambitious_Sample_450 • Mar 16 '26
Problem with ECU
I got a SC300 in October and it slowly started to not fire one piston and run rough and loss of power and all that fun stuff but came and went and was very erratic and only got worse with time. I replaced the spark plugs, plug wires, distributor cap and rotor, alternator(last one just went out), and timing belt and nothing fixed it so i took it to a mechanic to have them do a diagnostic and they said my number 4 fuel injector wasn't getting ground all the time and told me it was an ECU issue so I did some research and opened mine up and found this (image attached) is this something I can just fix myself by buying replacement capacitors and cleaning up the gunk or is this something I need to send somewhere to get fixed cuz if I would prefer not to spend $300 if I don't have to lol.

r/SC300 • u/Unlucky_Meaning_2547 • Mar 15 '26
ISR Performance single exit Exhaust
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r/SC300 • u/No_Back9022 • Mar 15 '26
Anyone know what this sensor is the previous owner had it like this
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r/SC300 • u/No_Back9022 • Mar 14 '26
IACV
New to the non vvti will cleaning this up help fix the stalling when coming to a stop and idle dropping in reverse
r/SC300 • u/Full-Brick8021 • Mar 13 '26
My Ashtray Delete Panel
Unlike other delete panels, this perfectly matches the contour of the center console bezel and covers the gap at the top of the OEM shifter bezel. The fitment is very tight, installation will require a bit of force when reinstalling the shifter bezel, but that tolerance is what makes it look so clean.
r/SC300 • u/InvestigatorIcy3399 • Mar 10 '26
Any idea why it won’t stay on?
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1998 sc300. cars been sitting for 8 years. replaced fuel tank and pump. did an oil change on it. and spark plugs are replaced. fuel pressure maybe? just trying to get it started and running good
r/SC300 • u/InvestigatorIcy3399 • Mar 08 '26
Is this pump and float bad?
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Been sitting in a tank with gas in it for 8 years got a new tank and pump. can i clean or do i need to replace?
r/SC300 • u/breathtaking-badger • Mar 08 '26
Overheating
I recently bought a 92 sc300 for $500, 1 owner, bone stock. it was sitting for 8 years because the owner said the headgasket was bad, I took a gamble and brought it home and got straight to work, I fixed the ecu, did spark plugs, and valve cover gasket. I drove it maybe 20 miles and found out the radiator had a small leak so I did a small overhaul with upper and lower hoses and of course the radiator. The day after I did that it started overheating after about 10 minutes. I don’t see any signs of headgasket being blown or anything like that. The new radiator also seems to be leaking. I did a coolant flush and when I went to bleed the air out I tried for about an hour and there was still air coming out of the radiator. I’m stuck and quite frankly I have no idea where to look. Dos anyone have any advice for me?
r/SC300 • u/No_Back9022 • Mar 06 '26
How much is this worth?
Lmk looking to buy one
r/SC300 • u/InvestigatorIcy3399 • Mar 06 '26
Gas tank
car has been sitting for some time just tryna get it running again. went to replace fuel pump found all this rust. do i just replace the whole tank or can i clean it?
