wont the excessive cylinder temps. show up on the temp gauge?
EGR valve
- Thread starter Brentbba
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[quote author=Rich link=board=2;threadid=15900;start=msg152748#msg152748 date=1083982478]
Toyota says lack of EGR can cause detonation.
[/quote]
This remember is for a 2F. If what you just said was true, all the 2F's internationally would have detonation problems as most didn't come with any EGR.
According to many the EGR is a nasty cause of 2F degeneration and causes combustion chamber carbon deposits.
Toyota says lack of EGR can cause detonation.
[/quote]
This remember is for a 2F. If what you just said was true, all the 2F's internationally would have detonation problems as most didn't come with any EGR.
According to many the EGR is a nasty cause of 2F degeneration and causes combustion chamber carbon deposits.
[quote author=3fj40 link=board=2;threadid=15900;start=msg153386#msg153386 date=1084150188]
...
If what you just said was true, all the 2F's internationally would have detonation problems as most didn't come with any EGR.
...
[/quote]
Here is a quote from a Toyota technical training document: "Because EGR tends to reduce the volatility of the air/fuel charge, loss of EGR typically causes detonation to occur. If EGR is commanded but doesn't flow (restricted passage in manifold, nonfunctional vlave, etc.) severe detonation will occur."
I can not ascertain, but I do presume, that Toyota has adequate basis for asserting the above information. The context for the referenced technical documentation is electronically controlled Toyota engines distributed in the United States. I myself have no basis to state whether the information from Toyota is applicable to any of the 2F engines sold either in the US or outside of the US.
...
If what you just said was true, all the 2F's internationally would have detonation problems as most didn't come with any EGR.
...
[/quote]
Here is a quote from a Toyota technical training document: "Because EGR tends to reduce the volatility of the air/fuel charge, loss of EGR typically causes detonation to occur. If EGR is commanded but doesn't flow (restricted passage in manifold, nonfunctional vlave, etc.) severe detonation will occur."
I can not ascertain, but I do presume, that Toyota has adequate basis for asserting the above information. The context for the referenced technical documentation is electronically controlled Toyota engines distributed in the United States. I myself have no basis to state whether the information from Toyota is applicable to any of the 2F engines sold either in the US or outside of the US.
Rich, completely agree with you on the EFI-controlled engines 
I am by far no expert, but my experience with the 2F's lead me to believe (where legal and applicable) the EGR removal helped loads of issues. The nice thing on non-EFI engines is that you can just do it all by hand without screwing up some part of the computer
I'm actually pretty shocked that Toyota stated `severe' detonation. EGR must be much more heavily employed on later models...
I am by far no expert, but my experience with the 2F's lead me to believe (where legal and applicable) the EGR removal helped loads of issues. The nice thing on non-EFI engines is that you can just do it all by hand without screwing up some part of the computer I'm actually pretty shocked that Toyota stated `severe' detonation. EGR must be much more heavily employed on later models...