3rd & 4th Generation (19921996 & 19972001)Toyota Camry Discussion for years: 1992-1996 & 1997-2001
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My 95 V6 has been throwing an "excessive EGR flow" code for a while (since mid-winter) and I've done the basic EGR/tube cleaning stuff, but it still hasn't fixed it.
Now that it's spring and I finally have the chance to floor it once in a while, it's like the power has just evaporated compared to last summer. Not wanting to just judge by my ass-dyno, I did a couple 0-60 runs on the highway. It takes me over 14 seconds to get to 60 now (alone in the car). That used to be around 7-8 secs IRRC. My 84 4-banger could get there quicker.
So, I'm wondering if I should rip the shit out of my EGR system, but it struck me that the cat has (probably) not been replaced for a long time and that could cause some excessive back-pressure and loss of power. Before I drop $400 on a replacement - does this make sense to anybody else?
-Thanks a million
__________________ Old and Busted: '84 Camry LE <2S-E>|| '89 Celica GT-S <3S-GE>|| '91 Camry LE <3S-FE>|| '95 Camry LE V6 <1MZ-FE>
If the cat is clogged it will usually be a lot more harmful than just throwing an EGR code. I also know the egr system will not generally negatively effect your performance if it isn't functional.
Check all the signs for now, plugs, tb, dist, wires, cap, rotor, and all your fluids.
If the cat is clogged it will usually be a lot more harmful than just throwing an EGR code. I also know the egr system will not generally negatively effect your performance if it isn't functional.
Check all the signs for now, plugs, tb, dist, wires, cap, rotor, and all your fluids.
If none of that works come back and let us know.
I checked all the standard "tune-up" items back in January. Everything looked fine, but it still kept throwing the code. Plugs and wires were first done about 20,000 ago, after the first 140,000.
One I didn't do - are the specific throttlebody check that I should be doing?
__________________ Old and Busted: '84 Camry LE <2S-E>|| '89 Celica GT-S <3S-GE>|| '91 Camry LE <3S-FE>|| '95 Camry LE V6 <1MZ-FE>
hmm i haven't thought about it being my cat, but i'm actually running that code too... i'm now running that and egr flow insufficient, means i need a new one. but yea... i never had power loss... but do a good egr cleaning and you may feel power bck... hope it works and keep us posted!
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loves it when i make ppl regret not downshifting ;-)
TRUST YOUR DRIVER RESPECT YOUR MONKEY
im experiancing this same code with my 97, but the car idles really rough. id check the EGR valve itself to see of it moves smoothly and check the EGR VSV. they seem to go slowly so ya may end up like my situation if they go bad. my problem seems to be the VSV that needs replacing.
im experiancing this same code with my 97, but the car idles really rough. id check the EGR valve itself to see of it moves smoothly and check the EGR VSV. they seem to go slowly so ya may end up like my situation if they go bad. my problem seems to be the VSV that needs replacing.
question, how do i check if the pin moves smoothly? lol
__________________
loves it when i make ppl regret not downshifting ;-)
TRUST YOUR DRIVER RESPECT YOUR MONKEY
Blocked kitty wouldn't be real high up on my list of possible causes of a P0402.
Apologies if you've already got an FSM in front of you, but the two reasons for throwing a P0402 (excessive EGR flow) are (1) EGR gas temp. sensor value is high during EGR cut–off when engine is cold and (2) EGR valve is always open.
The EGR system is relatively gnarly, so there's quite a bit of possible things to troubleshoot. Rather than parrot the FSM, I refer you to http://www.camrystuff.com/manuals/Gen3/eg2.pdf page 527 for a loose list of causes, and page 516 for the recommended troubleshooting flow.
Blocked kitty wouldn't be real high up on my list of possible causes of a P0402.
Apologies if you've already got an FSM in front of you, but the two reasons for throwing a P0402 (excessive EGR flow) are (1) EGR gas temp. sensor value is high during EGR cutoff when engine is cold and (2) EGR valve is always open.
The EGR system is relatively gnarly, so there's quite a bit of possible things to troubleshoot. Rather than parrot the FSM, I refer you to http://www.camrystuff.com/manuals/Gen3/eg2.pdf page 527 for a loose list of causes, and page 516 for the recommended troubleshooting flow.
That's all well and good for the 402 error it keeps throwing at me (as I said, I haven't completely ripped the EGR system apart yet, since it seemed to run fine even with the code up), but could it also explain the gross loss in power? I'll try it either way, but everything I've seen seems to point to the EGR system not really robbing that much power when it's malfunctioning.
A 2x increase in 0-60 time points to a pretty huge power loss IMO. Like 50-80 HP. I'm going to clean up the TB and the EGR system, but is there anything else I should be looking for staring me in the face while I'm under the hood?
__________________ Old and Busted: '84 Camry LE <2S-E>|| '89 Celica GT-S <3S-GE>|| '91 Camry LE <3S-FE>|| '95 Camry LE V6 <1MZ-FE>
you pull the egr off and just push on the valve to see if it is binding. but if the car isnt running rough then that would tell me its a sensor/electrical problem and not mechanical(mine is mechanical). try cleaning the sensor in the egr valve housing.
That's all well and good for the 402 error it keeps throwing at me (as I said, I haven't completely ripped the EGR system apart yet, since it seemed to run fine even with the code up), but could it also explain the gross loss in power? I'll try it either way, but everything I've seen seems to point to the EGR system not really robbing that much power when it's malfunctioning.
A 2x increase in 0-60 time points to a pretty huge power loss IMO. Like 50-80 HP. I'm going to clean up the TB and the EGR system, but is there anything else I should be looking for staring me in the face while I'm under the hood?
Sorry, got so carried away with diagnosing the code I kind of ignored the bigger issue. You're right -- even if the EGR was stuck open or open more than needed, it wouldn't cause that huge power loss.
Are you getting more codes than the P0402? The power loss sort of sounds like the motor is in some sort of failsafe ("limp home") mode (such as extremely retarded timing), which would really make the engine fall on it's face. Offhand, 'tho, I can't think of a reasonable situation that would cause the ECU to fall back to a failsafe mode without throwing a code. I suppose an insanely sensitive knock sensor could cause that behavior, but usually knock sensors fail "dead", not noisy, and a dead knock sensor definitely throws a code.
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95 V6 - Thowing code "Excessive EGR Flow", Clogged Cat?
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