Alright, I am all out of ideas so I'm turning to Supramania for help. Yesterday I took the Supra out for a short drive and for the first time, I went WOT. It was at WOT for maybe 3-4 seconds in 3rd gear, and when I let off the gas the RPMs didn't drop as fast as they usually do and they stayed at about 2.5k RPMs at idle. Now when I turn it on it goes up to about 3k RPM =(
Went home, shut it off, and checked for codes, but there were none. I then went through and checked:
1. vacuum hoses: all seem fine
2. ISC is clicking and resistances look fine
3. TPS was recently adjusted, but I am going to check it again tomorrow
4. all intercooler couplers and places where there might be a leak seem fine too. I did used to have a boost leak but I fixed that and it still looks tight.
5. The dash pot is good, or at least I can blow through one side and it's hard to do it on the other side...
6. reset the ECU, everything still the same
7. timing was normal before, I can't really tell now if it's ok at 3k RPM all the time but could it have been messed up?
Right now I am thinking it's maybe my AFM, but that was functioning perfectly and I can see no reason why it would just suddenly fail.
Is it possible my intake manifold or something large is leaking? All gaskets are new throughout the engine and I followed all the torque specs in the TSRM.
I don't believe my FPR is broken, and my whole fuel system is stock.
Does anyone know of something else that would cause a high idle?
Went home, shut it off, and checked for codes, but there were none. I then went through and checked:
1. vacuum hoses: all seem fine
2. ISC is clicking and resistances look fine
3. TPS was recently adjusted, but I am going to check it again tomorrow
4. all intercooler couplers and places where there might be a leak seem fine too. I did used to have a boost leak but I fixed that and it still looks tight.
5. The dash pot is good, or at least I can blow through one side and it's hard to do it on the other side...
6. reset the ECU, everything still the same
7. timing was normal before, I can't really tell now if it's ok at 3k RPM all the time but could it have been messed up?
Right now I am thinking it's maybe my AFM, but that was functioning perfectly and I can see no reason why it would just suddenly fail.
Is it possible my intake manifold or something large is leaking? All gaskets are new throughout the engine and I followed all the torque specs in the TSRM.
I don't believe my FPR is broken, and my whole fuel system is stock.
Does anyone know of something else that would cause a high idle?
