help with reading codes on sc300
Trust me, the old maf is likely just fine. The bad ecu is the reason unplugging vs plugged didn't make a difference.
Now it wont start with either, that tells me your old maf was likely working and there is another issue in addition to the ecu which tanin fixed.
Throwing code 14 means at least one cylinder has a "misfire" and it lasts for more than 8 seconds.
That means you have a very repetitive misfire, could be a worn or pinched plug wire grounding to the cylinder head (from putting on and taking off covers, it happens), could be a spark plug that is toast or the gap has gotten so large it can't fire anymore (normal with age), it could be a worn rotor/cap (most people forget about these when doing a tune up).
Each of the ignition components including the cap and rotor have about a 60k service interval. Most people do plugs and maybe wires, forget the cap and rotor until the rotor wears down so much it leaves you stranded somewhere when it starts to misfire badly. At first you may notice the occasional hiccup, then shortly after one day it will sound like bad knocking almost and quickly gets so bad the car wont start or run on all the cylinders if it does at all.
So I guess my question is when was the last time you know plugs, wires, and cap and rotor were done? all those items together aren't expensive so do that first (cap rotor and plugs at least, then wires after if needed), there is no reason to suspect the maf and they are really expensive and don't go bad that often.
I know the 2jz is "bulletproof", but ignition components only last so long and its actually pretty good they even get to 200k on some cars before leaving you stranded when they are supossed to be changed every 60k.
If you are unsure about the plugs, pull some and post a picture.
On a side note, what do you mean the manifold was split when you got it? also the no cats?
If there was a misfire for a long period of time, it would dump fuel in the exhaust and burn up the cats, leading to alot of heat etc.. and things start to break.
Depending on what was done, if the cat was plugged up enough to split an exhaust manifold, then I would suspect possible engine damage or head gasket damage. If the simple fixes don't work I would get a compression tester and/or leakdown tester on it and see what is really going on.
Now it wont start with either, that tells me your old maf was likely working and there is another issue in addition to the ecu which tanin fixed.
Throwing code 14 means at least one cylinder has a "misfire" and it lasts for more than 8 seconds.
That means you have a very repetitive misfire, could be a worn or pinched plug wire grounding to the cylinder head (from putting on and taking off covers, it happens), could be a spark plug that is toast or the gap has gotten so large it can't fire anymore (normal with age), it could be a worn rotor/cap (most people forget about these when doing a tune up).
Each of the ignition components including the cap and rotor have about a 60k service interval. Most people do plugs and maybe wires, forget the cap and rotor until the rotor wears down so much it leaves you stranded somewhere when it starts to misfire badly. At first you may notice the occasional hiccup, then shortly after one day it will sound like bad knocking almost and quickly gets so bad the car wont start or run on all the cylinders if it does at all.
So I guess my question is when was the last time you know plugs, wires, and cap and rotor were done? all those items together aren't expensive so do that first (cap rotor and plugs at least, then wires after if needed), there is no reason to suspect the maf and they are really expensive and don't go bad that often.
I know the 2jz is "bulletproof", but ignition components only last so long and its actually pretty good they even get to 200k on some cars before leaving you stranded when they are supossed to be changed every 60k.
If you are unsure about the plugs, pull some and post a picture.
On a side note, what do you mean the manifold was split when you got it? also the no cats?
If there was a misfire for a long period of time, it would dump fuel in the exhaust and burn up the cats, leading to alot of heat etc.. and things start to break.
Depending on what was done, if the cat was plugged up enough to split an exhaust manifold, then I would suspect possible engine damage or head gasket damage. If the simple fixes don't work I would get a compression tester and/or leakdown tester on it and see what is really going on.
Last edited by Ali SC3; Jul 14, 2020 at 12:39 PM.
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