EGR removal and dealing with ECU codes?
Thread Starter
Registered User
Joined: Feb 2010
Posts: 14
From: Tucson
EGR removal and dealing with ECU codes?
I'm a newbie and I was looking through bunches of threads concerning the "EGR Removal" but nothing how to fooling the ECU in detecting a EGR Fault. There two EGR Codes.
32*: EGR function
35*: Exhaust gas temp. sensor circuit
* indicates that the "Check Engine" light will come on under normal driving.
How are you guys getting around this?
32*: EGR function
35*: Exhaust gas temp. sensor circuit
* indicates that the "Check Engine" light will come on under normal driving.
How are you guys getting around this?
Registered User
Joined: Dec 2011
Posts: 72
I'd be nice to know the stats on the Car// Year and Mods..
I'll have to look at my notes, but I think the Ca. Cars use the Temp Sensor in the Pipe to see if it gets warm, and the ECU will 'Feel' for the EGR Sol by Checking Current Draw..
From what I remember, the Temp Sensor can be Bypassed by installing a resistor, to let the ECU think the Pipe is Hot all the Time ( Flowing gas ), and the Sol Coil can just stay on the car and do not hook up the Vac Lines..
Why are you killing the EGR?.. I think your in Ca, and it will be needed to pass the treadmill test.
On the Early z32's ( pre '93) the AIV's can be deleted but the '93 and Later ECU ( prom ) must be used to get the Idle back proper to pass ca smog.. but if you get a 'Know it All' smog inspector, the AIV's better look like they are there, or you will fail the Underhood Inspection..
The FED ECU ( or just a Prom if your ECU has a Socket) will not check for the EGR temp Sensor.. that is a CA thing.. so the ideal ECU ( or prom ) to have is '93 or '94 FED, as no AIV's and no EGR temp sensor.. and it will run in a pre '93 car FED or Ca, and pass Ca treadmill Smog test..
Cap
I'll have to look at my notes, but I think the Ca. Cars use the Temp Sensor in the Pipe to see if it gets warm, and the ECU will 'Feel' for the EGR Sol by Checking Current Draw..
From what I remember, the Temp Sensor can be Bypassed by installing a resistor, to let the ECU think the Pipe is Hot all the Time ( Flowing gas ), and the Sol Coil can just stay on the car and do not hook up the Vac Lines..
Why are you killing the EGR?.. I think your in Ca, and it will be needed to pass the treadmill test.
On the Early z32's ( pre '93) the AIV's can be deleted but the '93 and Later ECU ( prom ) must be used to get the Idle back proper to pass ca smog.. but if you get a 'Know it All' smog inspector, the AIV's better look like they are there, or you will fail the Underhood Inspection..
The FED ECU ( or just a Prom if your ECU has a Socket) will not check for the EGR temp Sensor.. that is a CA thing.. so the ideal ECU ( or prom ) to have is '93 or '94 FED, as no AIV's and no EGR temp sensor.. and it will run in a pre '93 car FED or Ca, and pass Ca treadmill Smog test..
Cap
Thread Starter
Registered User
Joined: Feb 2010
Posts: 14
From: Tucson
I'd be nice to know the stats on the Car// Year and Mods..
I'll have to look at my notes, but I think the Ca. Cars use the Temp Sensor in the Pipe to see if it gets warm, and the ECU will 'Feel' for the EGR Sol by Checking Current Draw..
From what I remember, the Temp Sensor can be Bypassed by installing a resistor, to let the ECU think the Pipe is Hot all the Time ( Flowing gas ), and the Sol Coil can just stay on the car and do not hook up the Vac Lines..
Why are you killing the EGR?.. I think your in Ca, and it will be needed to pass the treadmill test.
On the Early z32's ( pre '93) the AIV's can be deleted but the '93 and Later ECU ( prom ) must be used to get the Idle back proper to pass ca smog.. but if you get a 'Know it All' smog inspector, the AIV's better look like they are there, or you will fail the Underhood Inspection..
The FED ECU ( or just a Prom if your ECU has a Socket) will not check for the EGR temp Sensor.. that is a CA thing.. so the ideal ECU ( or prom ) to have is '93 or '94 FED, as no AIV's and no EGR temp sensor.. and it will run in a pre '93 car FED or Ca, and pass Ca treadmill Smog test..
Cap
I'll have to look at my notes, but I think the Ca. Cars use the Temp Sensor in the Pipe to see if it gets warm, and the ECU will 'Feel' for the EGR Sol by Checking Current Draw..
From what I remember, the Temp Sensor can be Bypassed by installing a resistor, to let the ECU think the Pipe is Hot all the Time ( Flowing gas ), and the Sol Coil can just stay on the car and do not hook up the Vac Lines..
Why are you killing the EGR?.. I think your in Ca, and it will be needed to pass the treadmill test.
On the Early z32's ( pre '93) the AIV's can be deleted but the '93 and Later ECU ( prom ) must be used to get the Idle back proper to pass ca smog.. but if you get a 'Know it All' smog inspector, the AIV's better look like they are there, or you will fail the Underhood Inspection..
The FED ECU ( or just a Prom if your ECU has a Socket) will not check for the EGR temp Sensor.. that is a CA thing.. so the ideal ECU ( or prom ) to have is '93 or '94 FED, as no AIV's and no EGR temp sensor.. and it will run in a pre '93 car FED or Ca, and pass Ca treadmill Smog test..
Cap
I just purchased a 1993 300Z with 106K miles that has a bad automatic transmission. Right know I'm in the process of repairing a value cover gasket that has a oil leak when I noticed were the EGR valve is located. I'm not sure if there a temp sensor in the EGR Valve for this model. I was doing some primary research how to replace the EGR Valve when I found that many owner were just removing the EGR Assembly. So my question posted here is how is the ECU fooled in thinking everything was fine with the EGR when the EGR assembly was removed? I believe you answer my questions which also leave me with more questions, for example; if I don't have a temp sensor what then?
Given this another thought, I'm just going to replace the EGR Valve and forget about all this stuff. Play it safe with the Smog Policy!
Compared to what I know about America with the ODB-I system this would be very difficult.
Really a nice location Nissan!
Comments welcome!
Registered User
Joined: Dec 2011
Posts: 72
So you have a '93 Auto.. if you do not have a Temp Sensor on the EGR piping at the EGR Valve, then it's a FED car.. it will pass anyway..
You do not have the AIV's ( Aux Air tubes to the Cat Converters, that are only used a Idle, and Fast Idle )..
The '93 will have the Late Model Fuel Injectors, unles you are a TT.. then it will be the Early Style..
the ECU is an 8 Bit, as the 16 Bits came in in the '94's and up.. depending on Body Style, and Turbo/Non..
Could pull the Passenger Floor Mat, and get the Numbers Off the ECU and go to Jim Wolf Tech Web Site.. they have a PDF that has the ECU # and Yesr of car.. you just might have a Surprise under the Floor Mat, and have a Modded ECU.. that was found under the Floor Mat of one of my Z's..
If you are under the Plenum.. do the Water Delete to the T-Bodies.. makes the Maintenance on these thing simplier.. and replace the PCV hoses now.. Z1 has the Molded Hoses..
Cap
You do not have the AIV's ( Aux Air tubes to the Cat Converters, that are only used a Idle, and Fast Idle )..
The '93 will have the Late Model Fuel Injectors, unles you are a TT.. then it will be the Early Style..
the ECU is an 8 Bit, as the 16 Bits came in in the '94's and up.. depending on Body Style, and Turbo/Non..
Could pull the Passenger Floor Mat, and get the Numbers Off the ECU and go to Jim Wolf Tech Web Site.. they have a PDF that has the ECU # and Yesr of car.. you just might have a Surprise under the Floor Mat, and have a Modded ECU.. that was found under the Floor Mat of one of my Z's..
If you are under the Plenum.. do the Water Delete to the T-Bodies.. makes the Maintenance on these thing simplier.. and replace the PCV hoses now.. Z1 has the Molded Hoses..
Cap
Thread Starter
Registered User
Joined: Feb 2010
Posts: 14
From: Tucson
So you have a '93 Auto.. if you do not have a Temp Sensor on the EGR piping at the EGR Valve, then it's a FED car.. it will pass anyway..
You do not have the AIV's ( Aux Air tubes to the Cat Converters, that are only used a Idle, and Fast Idle )..
The '93 will have the Late Model Fuel Injectors, unles you are a TT.. then it will be the Early Style..
the ECU is an 8 Bit, as the 16 Bits came in in the '94's and up.. depending on Body Style, and Turbo/Non..
Could pull the Passenger Floor Mat, and get the Numbers Off the ECU and go to Jim Wolf Tech Web Site.. they have a PDF that has the ECU # and Yesr of car.. you just might have a Surprise under the Floor Mat, and have a Modded ECU.. that was found under the Floor Mat of one of my Z's..
If you are under the Plenum.. do the Water Delete to the T-Bodies.. makes the Maintenance on these thing simplier.. and replace the PCV hoses now.. Z1 has the Molded Hoses..
Cap
You do not have the AIV's ( Aux Air tubes to the Cat Converters, that are only used a Idle, and Fast Idle )..
The '93 will have the Late Model Fuel Injectors, unles you are a TT.. then it will be the Early Style..
the ECU is an 8 Bit, as the 16 Bits came in in the '94's and up.. depending on Body Style, and Turbo/Non..
Could pull the Passenger Floor Mat, and get the Numbers Off the ECU and go to Jim Wolf Tech Web Site.. they have a PDF that has the ECU # and Yesr of car.. you just might have a Surprise under the Floor Mat, and have a Modded ECU.. that was found under the Floor Mat of one of my Z's..
If you are under the Plenum.. do the Water Delete to the T-Bodies.. makes the Maintenance on these thing simplier.. and replace the PCV hoses now.. Z1 has the Molded Hoses..
Cap
As for the two Throttle Bodies the so called Deicing Water Hoses are coming out for sure. I do have a new complete set of PCV Hoses & PVC Valves ready for install. Now just waiting for the Valve Cover Crush Plastic Washers that are almost free!
So how hard is it going to be to replace the EGR? I have found some web site saying this can be done easier with the transmission out. Any thoughts or a good web site for me to view?
Thanks again.
Byron
Registered User
Joined: Dec 2011
Posts: 72
FED is a 49 States ECU.. used in all states but California.. a Ca ECU is one that is for use in California.. Different Smog Requirements..
A FED ECU can go in FED and CA Cars. If a Ca ECU goes into a FED Car, it will not find all the sensors, and will toss a lite..
Modded ECU.. Modified ECU.. Usually has the EPROM Chip removed and replaced with an EEROM or the Like.. The EPROM is soldered into the Board, so the EPROM must be unsoldered and a Sockett installed.. ZIF Sockett is the way to go..
EDIT: Note to self.. do not Post while Distracted..
Auto TT [Edit the PROM ] will run in anything.. it's just the [Edit] ECU needs to be compatable with the car.. Auto program will run a Manual just fine, but the Other way is BAD.. a TT Prom will run a N/A car, but the Fuel Pump Controller needs to ba a NA. to match the ECU to the Fuel Controller.. stuff like that..
Cap
A FED ECU can go in FED and CA Cars. If a Ca ECU goes into a FED Car, it will not find all the sensors, and will toss a lite..
Modded ECU.. Modified ECU.. Usually has the EPROM Chip removed and replaced with an EEROM or the Like.. The EPROM is soldered into the Board, so the EPROM must be unsoldered and a Sockett installed.. ZIF Sockett is the way to go..
EDIT: Note to self.. do not Post while Distracted..
Auto TT [Edit the PROM ] will run in anything.. it's just the [Edit] ECU needs to be compatable with the car.. Auto program will run a Manual just fine, but the Other way is BAD.. a TT Prom will run a N/A car, but the Fuel Pump Controller needs to ba a NA. to match the ECU to the Fuel Controller.. stuff like that..
Cap
Last edited by Cap; Aug 21, 2012 at 05:47 PM. Reason: Brain Dead
Thread Starter
Registered User
Joined: Feb 2010
Posts: 14
From: Tucson
FED is a 49 States ECU.. used in all states but California.. a Ca ECU is one that is for use in California.. Different Smog Requirements..
A FED ECU can go in FED and CA Cars. If a Ca ECU goes into a FED Car, it will not find all the sensors, and will toss a lite..
Modded ECU.. Modified ECU.. Usually has the EPROM Chip removed and replaced with an EEROM or the Like.. The EPROM is soldered into the Board, so the EPROM must be unsoldered and a Socket installed.. ZIF Socket is the way to go..
EDIT: Note to self.. do not Post while Distracted..
Auto TT [Edit the PROM ] will run in anything.. it's just the [Edit] ECU needs to be compatible with the car.. Auto program will run a Manual just fine, but the Other way is BAD.. a TT Prom will run a N/A car, but the Fuel Pump Controller needs to ba a NA. to match the ECU to the Fuel Controller.. stuff like that..
Cap
A FED ECU can go in FED and CA Cars. If a Ca ECU goes into a FED Car, it will not find all the sensors, and will toss a lite..
Modded ECU.. Modified ECU.. Usually has the EPROM Chip removed and replaced with an EEROM or the Like.. The EPROM is soldered into the Board, so the EPROM must be unsoldered and a Socket installed.. ZIF Socket is the way to go..
EDIT: Note to self.. do not Post while Distracted..
Auto TT [Edit the PROM ] will run in anything.. it's just the [Edit] ECU needs to be compatible with the car.. Auto program will run a Manual just fine, but the Other way is BAD.. a TT Prom will run a N/A car, but the Fuel Pump Controller needs to ba a NA. to match the ECU to the Fuel Controller.. stuff like that..
Cap
Byron
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