Put in Fed Spec hybrid ECU = Still getting EGR CEL. wtf. - 3000GT/Stealth International Message Center

lawdogg · 07-25-2008, 06:00 AM

I replaced my cali-spec ECU with a fed-spec ECU, hybrid (94).

I unplugged one of my cali-spec o2 sensors and put my wideband in its place ... the other one is still connected.

Partial throttle ... 6th gear on the highway ... throws a CEL when I keep it constant, just like it used to. It's the EGR CEL because it doesn't show up on my logger.

I thought the fed-spec ECU shouldn't throw the EGR CEL? Maybe they are the same, except it knows when you have cali-spec o2 sensors or not?

Steelythefez · 07-25-2008, 07:09 AM

I had to wire in the resistor on mine to keep the CEL away.

Struggly · 07-25-2008, 07:16 AM

Quote:

Originally Posted by lawdogg

I replaced my cali-spec ECU with a fed-spec ECU, hybrid (94).

I unplugged one of my cali-spec o2 sensors and put my wideband in its place ... the other one is still connected.

Partial throttle ... 6th gear on the highway ... throws a CEL when I keep it constant, just like it used to. It's the EGR CEL because it doesn't show up on my logger.

I thought the fed-spec ECU shouldn't throw the EGR CEL? Maybe they are the same, except it knows when you have cali-spec o2 sensors or not?

Sounds normal to me. You have no EGR and no resistor in the thermosensor harness, right? If so, you will throw code 43.

Clint

lawdogg · 07-25-2008, 07:19 AM

Thanks guys.

I thought the Fed hybrid ECU would let me totally eliminate my cali o2's and EGR system. Oh well.

Resisitor time!

Struggly · 07-25-2008, 07:44 AM

Quote:

Originally Posted by lawdogg

Thanks guys.

I thought the Fed hybrid ECU would let me totally eliminate my cali o2's and EGR system. Oh well.

Resisitor time!

Nope, FED and Cali hybrid ECUs interact with the EGR system in the same way.

You may be thinking of the difference between OBDI Fed and Cali cars: the OBDI Fed-spec cars don't monitor the EGR and therefore can't throw a code, whereas the OBDI Cali cars do monitor the EGR and therefore will throw a code.

Clint

etecnifibre · 07-26-2008, 03:17 AM

Quote:

Originally Posted by lawdogg

Thanks guys.

I thought the Fed hybrid ECU would let me totally eliminate my cali o2's and EGR system. Oh well.

Resisitor time!

Mine throws the code as well. I even have the resistor. Maybe I wired it into the wrong one.

07-25-2008, 06:00 AM	#1 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Put in Fed Spec hybrid ECU = Still getting EGR CEL. wtf. I replaced my cali-spec ECU with a fed-spec ECU, hybrid (94). I unplugged one of my cali-spec o2 sensors and put my wideband in its place ... the other one is still connected. Partial throttle ... 6th gear on the highway ... throws a CEL when I keep it constant, just like it used to. It's the EGR CEL because it doesn't show up on my logger. I thought the fed-spec ECU shouldn't throw the EGR CEL? Maybe they are the same, except it knows when you have cali-spec o2 sensors or not? __________________ 94 VR-4: 11.8 @ 116, 17psi, pump, 13Ts

07-25-2008, 07:09 AM	#2 (permalink)
Steelythefez Masshole Join Date: Oct 2000 Location: Framingham, MA Trader Rating: (19)	Re: Put in Fed Spec hybrid ECU = Still getting EGR CEL. wtf. I had to wire in the resistor on mine to keep the CEL away. __________________ 94 vr4

07-25-2008, 07:19 AM	#4 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Put in Fed Spec hybrid ECU = Still getting EGR CEL. wtf. Thanks guys. I thought the Fed hybrid ECU would let me totally eliminate my cali o2's and EGR system. Oh well. Resisitor time!

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