This is topic question for smog techs or experts: pass smog with chip? in forum General Talk at Northern California Ford Owners  .


To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=028596

---

Posted by venomous99 (Member # 1917) on :
 
just curious if i have a diablo chip on my mustang will the smog check find it and result in a fail?
if i pull codes, i get a 511, which ive read is related to having a aftermarket chip on the computer.
what info from the computer does the smog machine pull and is any code interpretted as a failed smog?
i dont have smog due a year from now but want to prepare in case i need to find a hookup.
 

---

Posted by Hungry Hippo (Member # 537) on :
 
should be ok with obd1, but not 2
 

---

Posted by venomous99 (Member # 1917) on :
 
mine is a 94 so im in good shape.
 

---

Posted by 64valves*pbr* (Member # 7295) on :
 
whats the exact code description.as long as theres no check engine light on and your car doesnt have some super cray tune on the chip youll be okay
 

---

Posted by venomous99 (Member # 1917) on :
 
here is teh description from fordfuelinjection.com
code 511: EEC permanent Read Only Memory (ROM) test failed
from what i read on the corral, this is related to the aftermarket chip. this code does not trigger the check engine light.
 

---

Posted by JohnB (Member # 969) on :
 
It's OBD-1, so all a tech will check for is the initial CE light on startup. You'll be fine as long as the tables are in line and in favor of passing...
 

---

Posted by 64valves*pbr* (Member # 7295) on :
 
do you know if it is a pending or current code.is it found on koeo or koer test
 

---

Posted by eljefe (Member # 1753) on :
 
ya as long as the light doesnt come on and stay on your cool, now just hope it passes the sniffer with the chip
 

---

Posted by venomous99 (Member # 1917) on :
 
the code comes up on koeo.

the car has past smog with the blower in the past when it had 24lb injectors and fmu. it is now tuned with 42lb'ers. i will probably find a shop to do a pretest first to see if everything looks fine.

so does the same go with the obd-II? as long as the CEL does not trigger, you'll pass assuming everything else passes or is the test more extensive?

luckily i have a smog shop down the street from my house. they seem to be more lenient about the visual as ive passed with a non carb legal CAI and it seems theyre more concerned about the sniffer. maybe its from my experience only but asian shops seem to let things pass on the visual. ive heard of some places that refuse cars if theyr'e modded even if the parts are carb legal.

[ March 01, 2007, 01:37 AM: Message edited by: venomous99 ]
 

---

Posted by 64valves*pbr* (Member # 7295) on :
 
some places will refuse.if it is a koeo then it wont usually pick up the code when the car is running.hence the terms Key On Engine Off/Key On Engine Running.if you didnt already know that.obdII is a little different the computer will comunicate alot more info with the smog computer.soon we will start seeing the new obdIII systems.they are supposed to be insane
 

---

Posted by BCINGUU (Member # 2397) on :
 
You should be able to get rid of that code by setting the correct checksum base address in the chip (probably 0 in the case of diablo). You may have to go to a tuner or the shop you bought the chip from to get that value set correctly.
 

---

Posted by venomous99 (Member # 1917) on :
 

quote:

---

Originally posted by BCINGUU:
You should be able to get rid of that code by setting the correct checksum base address in the chip (probably 0 in the case of diablo). You may have to go to a tuner or the shop you bought the chip from to get that value set correctly.

---