code 71 egr gas temp

[89supra7mgte]

took my car out today got code 71 took 100 miles to set. The PO had removed the egr system and i cannot afford to put one back on at this time.

The code is for egr gas temp. is there anyway around this code without having to install the entire system? Does it have to be egr gas temp, or can i run a different set up such as relocating the gas temp sensor, and hooking up to the original connector?

I didnt notice any drivabilty issues but that does not mean it cant create them. soon as the code set i stayed out of boost not wanting to create any damage if possible.

thanks for any advice

 

[suprajztwenty]

i have 2 red plugs near my intake that arent hooked up to anything, they look identical to me (assuming they go to egr) but like you, my previous owner deleted all that stuff with block off plates.

i would assume its going to be a temp sensor wire thats shorted or something...i doubt its hooked up to any temp sensors

 

[89supra7mgte]

Well the egr is gone, which has the gas temp sensor. i am wondering if i can relocate it in the exhaust somewhere? or by pass it somehow?

my main concern is engine performance though.

 

[Poodles]

former Cali car?

 

[89supra7mgte]

it was purchased in colorado but has cal emissions on what a bitch.

I would like to stay away from reinstalling the emissions shit only because there is a block off plate on teh back of the head and i would have to purchase all the components as well.

What are the differences in ecu from a cal emission car and federal? would that be a possibility?

 

[Poodles]

federal cars don't have that sensor and won't have that code.

 

[89supra7mgte]

what about the rest of the egr shit? i seen on tsrm that the egr valve, vsv, temp sensor can set this code if any fail. is that the only difference in them is emissions? could i swap out computers, or would that possibly create problems in the future?

What about running a different temp sensor somewhere in the exhaust using stock connector? or can that create false reading in computer making car run bad?

 

[toyotanos]

no the computer wants to see the EGR temp change when it wants EGR operation. It's like a double-check to make sure the EGR system is working.

 

[89supra7mgte]

so what are my options around this(short or replacing everything)? this is the first time the code has set and the egr has been gone since i bought the car?

If i change the computer to one that does not look for the change would that work with the rest of the engine performance?

 

[Poodles]

Correct.

Not to mention the ECU is tuned for the EGR to be there and removing it can cause damage (but we don't need to start another one of THOSE threads).

Your real options are:
- Replace EGR
- Replace ECU with a JDM one (they didn't have EGR)
- Get a standalone ECU

 

[89supra7mgte]

ok well i am going to look for a fed emission ecu then, and that would essentially make my car run as if it was never installed correct? How can i tell if the ecu is fed or cal?

 

[Poodles]

fed ECU is still tuned for EGR, it just doesn't have the sensor...

 

[jetjock]

The EGR temp sensor is irrelevant to the operation of the EFI system. It's only there because BAR mandated EGR monitoring. The code can be done away with by simply installing a resistor across the sensor connector, one whose value represents the original thermistor's resistance when EGR is flowing...

 

[89supra7mgte]

Would anybody know what the resistance is on the sensor. that might save me some money compared to buying a new ecu.

Will i still get egr codes though being that there is no egr components? or is that sensor the main reason for a code 71

 

[Poodles]

Yep, that's the main reason, but like I said, you have another issue running on an ECU that is tuned for the EGR to be there and functioning...

 

[89supra7mgte]

what would you recommend doing then? To replace all the egr components is pricey and not to mention having to pull the head to take the block off plate and install a cooler.

How dif will the performance be without the egr system? It runs great for me now, with no issues.

 

[Poodles]

EGR doesn't lower performance as it's closed at WOT.

You can get used parts, and if you're limber, the cooler can can removed and replaced with the engine in the car.

Or go the JDM ECU route.

 

[jetjock]

It'll be fine as long as you use higher octane than usual. Course, there's the issue of continually dumping the worst of the three automotive pollutants into the air but with your moral turpitude that's not a problem right?

 

[89supra7mgte]

I live in colorado no emissions here, but either i am not about pollution. The var is not a dd so i think ill be fine on that note. And i am running the highest octane available here which is 91, wish it was higher or the 112 i put in my bike wasnt 5 bucks a gallon.

What is the JDM ecu route? one directly imported?

 

[935motorsports]

It doesn't have to be JDM, just a federal ECU. You can tell by the part number. There are several part numbers that will work.