smog and egr delete

snackman508

Member
Jun 16, 2019
3
1
13
32
Lancaster PA
ok so this have been discussed a lot with lots of differing opinions. here is my situation, Im swaping the 5.0 in a rx7. i pulled the egr and smog (plugged the holes in the heads and blocked off egr hole) off to make things simpler and they both needed replaced if i kept them. If i get the simulator plug will it shut off my smog codes as well all egr codes. are there other things i need to plug off or think about. ive heard people say it will run rich and others say the ecu will not be affected.
 
  • Sponsors(?)


90sickfox

I didn't really have an issue with the stink...
SN Certified Technician
Mar 2, 2015
5,369
4,397
203
42
The egr does actually do stuff to make the engine more efficient. It helps with ping ( spark knock ). The resistor ( egr plug delete ) tricks the computer to think the egr is working.....therefore making it susceptible to ping under certain cruise conditions. You may not notice a difference. The computer strategy will add fuel to protect the engine from ping if it knows the egr is missing. It may also mess with the computer controlled timing ( haven't verified that ). Usually, driveability won't suffer with either of those removed.

A check engine light is just a bulb....take it out. It probably won't be hooked up to your rx7 dash anyway....if you want to be a cheap ricer about it.

The best way to tackle this is to replace the egr and drive with confidence. The smog stuff won't affect the car at all as long as you aren't using factory mustang catalytic converters. Car won't run rich and you'll get all available power.
 

jrichker

StangNet's favorite TOOL
SN Certified Technician
Mar 10, 2000
27,437
2,870
234
74
Dublin GA
lowendmac.com
ok so this have been discussed a lot with lots of differing opinions. here is my situation, Im swaping the 5.0 in a rx7. i pulled the egr and smog (plugged the holes in the heads and blocked off egr hole) off to make things simpler and they both needed replaced if i kept them. If i get the simulator plug will it shut off my smog codes as well all egr codes. are there other things i need to plug off or think about. ive heard people say it will run rich and others say the ecu will not be affected.
Why don't you spend a few $ and learn for yourself how the ECC-IV works?
Ford Fuel Injection & Electronic Engine Control: How to Understand, Service, and Modify : All EEC-IV Systems on Ford, Lincoln, Mercury Cars and Light Trucks 1988-1993 1st Edition

Get the most from your Ford Electronic Fuel Injection system with this 400 page book. The book also has over 500 photos and illustration and includes EEC-IV diagrams and hundreds of specifications. It also has a special chapter filled with definitive recommendations and "insider tips" for high performance tuning of the Ford EEC-IV system.

See View: https://www.amazon.com/Ford-Injection-Electronic-Engine-Control/dp/0837603013
 

7991LXnSHO

Now I want a 10 year badge
Sep 1, 2010
2,809
484
124
Kearney, NE
If it keeps the computer happy and possibly helps the air quality and car run better for so little weight, I agree with jrichker. I have seen enough differing info about how plugs and resistor packs work that putting it back or programming it out seem like the best two answers.
 
Thread starter Similar threads Forum Replies Date
krisx125 Deleting Smog Pump And Egr Help! Fox 5.0 Mustang Tech 3
9 EGR and Smog delete 1994 - 1995 Specific Tech 4
D Deleted egr and smog what vac lines to block? 1994 - 1995 Specific Tech 6
873Stang smog delete/cali smog/egr Fox 5.0 Mustang Tech 2
T EGR and Smog delete? Fox 5.0 Mustang Tech 13
B egr & smog delete side effects 1994 - 1995 Specific Tech 5
Dan95-5.0 what to do with colored vac lines after EGR and Smog delete 1994 - 1995 Specific Tech 2
O egr smog delete question Regional Forums and Event Information 2
S Need help with EGR related issues 1994 - 1995 Specific Tech 3
9 Engine 93 GT EGR spacer rear coolant tube routing? Smog help Fox 5.0 Mustang Tech 14
billison Egr/smog Solenoids Fox 5.0 Mustang Tech 19
K Ca Smog Egr Test Fox 5.0 Mustang Tech 7
ShallowGrave Exhaust Reinstall Egr And Smog Fox 5.0 Mustang Tech 3
pissedoff92 Smog pump removal while retaining EGR? Fox 5.0 Mustang Tech 9
GRAYFOXGT/CS to block or not to block egr with no smog pump 1994 - 1995 Specific Tech 7
N CA Smog Help - EGR Fox 5.0 Mustang Tech 21
L my last smog question (i hope) EGR sensor Fox 5.0 Mustang Tech 0
J egr system removable and smog pump removable Fox 5.0 Mustang Tech 7
S MPG/EGR/SMOG PUMP Fox 5.0 Mustang Tech 14
MotiV8ed_95GT Vacuum lines after smog and egr removal 1994 - 1995 Specific Tech 2
hollywoodstang Removing EGR and SMOG stuff Need your advice 1994 - 1995 Specific Tech 6
9 95 Stang EGR/Smog Pump connector at Cat's 1994 - 1995 Specific Tech 6
BlueOvalStangGT What can I remove inside my fender as far as EGR/Smog? VibrantRedGT! (Pics) 1994 - 1995 Specific Tech 3
P 97 Cobra Tuning for no egr, smog, abs, etc.. SVT Tech Forum 2
J EGR and Smog System Fox 5.0 Mustang Tech 2
Strype EGR/Smog Savvy Peoples! Fox 5.0 Mustang Tech 3
Vinnietbird EGR and smog removal question... Fox 5.0 Mustang Tech 6
J Yet another SMOG/EGR question. Fox 5.0 Mustang Tech 2
gcomfx.com PICS! Cheap EGR capping and sensor rigging - smog removal 1994 - 1995 Specific Tech 22
Beasly B Smog and EGR removal Fox 5.0 Mustang Tech 3
95COBRA241 EGR vs Smog pump 1994 - 1995 Specific Tech 8
P W/ Smog Pump Out..Can EGR Still Work? Fox 5.0 Mustang Tech 3
MineralG2k2GT EGR or Smog tube connected to header...what size Nut ?? SN95 4.6L Mustang Tech 0
A removing smog pump and egr 1994 - 1995 Specific Tech 2
DoctorB712 EGR and Smog Pump Eliminator Kits 1994 - 1995 Specific Tech 6
MikeR351w EGR, SMOG & P/S Eliminator kit Fox 5.0 Mustang Tech 5
R California Registration Help! 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 3
U What's it Worth? 67 Ford Mustang Thermactor Smog System What is it Worth?!?!? 2
R Fox SMOG Air Pump Valve Lines - Where to purchase? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 9
M Engine A.C. and smog delete Fox 5.0 Mustang Tech 6
S Any California residents-smog 2005 - 2014 S-197 Mustang -General/Talk- 0
Prime Lord WTB/Trade Smog Pump, hoses, and mounting brackets. Fox Body Mustangs For Sale (1979-93) 3
kamikaze5.0 V-1 Supercharger Belt Questions 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 3
titanium1990 Apologizing ahead of time... smog pump question 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 3
P Fuel code P0460 won’t pass smog SN95 4.6L Mustang Tech 11
Solid E Smog Tube Removal Help 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 8
P Engine Smog pump bolts Fox 5.0 Mustang Tech 0
D Passing CA smog with tune SN95 4.6L Mustang Tech 6
D 66 289 Smog pump removal and AC pulley question 1965 - 1973 Classic Mustangs -General/Talk- 0
fredfifty Exhaust Cali Smog /Rattling Cats Fox 5.0 Mustang Tech 6
Similar threads