I have a '98 GT with 130,000 miles on it. It is properly tuned and runs great . I average about 30 miles per gallon. The engine runs smooth from idle all the way up to 5,000RPM's. At the point when it hits 5k rpm's, it wont rev any higher in any gear. It just flattens out at 5k. Other then that, it runs strong with no other issues. Can anyonr tell me what the problem is?
'98 GT RPM's limited - 6G Celicas Forums
does it feel like the engine cuts off at that RPM, or does it just not want to go faster than that
QUOTE"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH1994 GT:V6 swap, 5speed E53 W/ LSD, All Power, now RED1995 ST:SOLD @273k miles, Auto, all power, CarPC, White1994 ST:Totaled, 5spd, all power, RedRIP 07/09/09 @ 241,8101994 Lexus LS400:This is my new DD
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It does not cut off, it just wont rev any higher. It remains running at 5k, but rough (it kind of stuters at 5k) and when I let off on the gas, it smooths out at under 5k.
QUOTE (stephen_lee @ Jan 15, 2009 - 4:47 PM) 
>does it feel like the engine cuts off at that RPM, or does it just not want to go faster than that
It does not cut off, it just wont rev any higher. It remains running at 5k, but rough (it kind of stuters at 5k) and when I let off on the gas, it smooths out at under 5k.
By nature of your FE engine, 5k is the plateau of your powerband... If you're having fueling issues (either lean or rich) then 5k would be about right for it to stutter... Do you know how to diagnose a lean/rich condition?
Mike W1996 Toyota Celica ST205 GT-FOURGT2860RS turbine, TiAL mvr44, JE 86.5φ piston, Clutchmasters FX400, APEX P-FC269awhp / 273ft-lbs
i don't believe that iv got mine up past 5
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Between my wife and I, we have 3 6GC's. My wifes '94 GT automatic revs to red line before shifting in all gears. My '94 GT manual will rev to and beyond red line before a shift with no problem. Our '98 is the only one with the problem.
QUOTE (delusionz @ Jan 15, 2009 - 8:13 PM)
>By nature of your FE engine, 5k is the plateau of your powerband... If you're having fueling issues (either lean or rich) then 5k would be about right for it to stutter... Do you know how to diagnose a lean/rich condition?
Between my wife and I, we have 3 6GC's. My wifes '94 GT automatic revs to red line before shifting in all gears. My '94 GT manual will rev to and beyond red line before a shift with no problem. Our '98 is the only one with the problem.
Why would you need to go over 4k? I don't ever go over 3.5 most of the time.
My money says you're losing fuel pressure. I've seen it a dozen times. Car runs great but if you're on it and revving it up it just hangs and doesn't go farther. Time for a fuel pump.
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It's not necessarily the need to do it, if the engine is performing properly it should be able to rev to the red line. If it can't, that is indicative of a problem.
QUOTE (99GT @ Jan 16, 2009 - 1:17 PM)
>Why would you need to go over 4k? I don't ever go over 3.5 most of the time.
It's not necessarily the need to do it, if the engine is performing properly it should be able to rev to the red line. If it can't, that is indicative of a problem.
I would replace the fuel filter and see what that does before replacing the fuel pump.
your wife's auto GT revs to red line before shifting in all gears???
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