[B]hello i am new to this forum my name is Gabriel
I just recently ran into my first CEL on my Integra yesterday which coincidentally came on shortly after I just had a smog done (bone stock) on my 92’ GS w/ Automatic transmission. I had looked up how to jump the ECU plug (OBD1) and did a code pull. #12 was the result (one long flash followed by two quick flashes) the light comes on only when in motion. on start up the CEL is off.
car appears to be running fine still but I am completely lost on where to look , some say EGR Valve or Vaccum line for the EGR Valve might be clogged and need cleaning ? only thing is that i have no idea where any of this is exactly
heres a shot of my intake manifold area. location of where i need to look or any help is appreciated CEL lights are annoying :think:[/B]
Where it say pgmi on your throttle body, it is literally right underneath the P, has a vaccum like going to it, there’s 2 of them that look the same but the bigger one is the idle control diaphragm, other one is smaller and the one you want
Oh nevr mind, I just saw auto and jump the gun
These might help, if they work that is. But I think I was right after looking at the pics. There are 2 diaphragms that look the same, the left and bigger one is your idle dashspot valve, the right smaller one should be the EGR. I think I got confused because it doesn’t seem like a dashpot valve would do much for recerculating the exhaust gases,
wow. these cars actually have an egr position sensor built in? good stuff, honda!
testing is simple. the solenoid applies vacuum to the valve to open it and allow exhaust gases into the intake charge at optimal time.
find the vacuum line which leads to the egr. disconnect it at the solenoid. install a vacuum pump to the line. start the car. allow to reach operating temp. apply vacuum to the valve. the idle should drop considerably. possibly stall. if it does, test the solenoid. if not, the valve is either stuck, vacuum line is leaking, or the egr port is plugged. all common possibilities.
get that far and report back with your findings
[QUOTE=welfare;2317144]wow. these cars actually have an egr position sensor built in? good stuff, honda!
testing is simple. the solenoid applies vacuum to the valve to open it and allow exhaust gases into the intake charge at optimal time.
find the vacuum line which leads to the egr. disconnect it at the solenoid. install a vacuum pump to the line. start the car. allow to reach operating temp. apply vacuum to the valve. the idle should drop considerably. possibly stall. if it does, test the solenoid. if not, the valve is either stuck, vacuum line is leaking, or the egr port is plugged. all common possibilities.
get that far and report back with your findings[/QUOTE]
is the solenoid the object with a black cover that says ‘Honda motor co.’ along the passenger side firewall next to the wiper motor ? I think it’s not in the picture. sorry I just needed to clarify before I proceed. so far the only thing I have done so far is remove the EGR valve and cleaned the ports at the bottom. wasn’t as dirty as I imagined but I proceeded to clean it anyways. put the EGR back once dry , followed the steps to reset my ECU then CEL persists to turn on once I start driving.
I don’t have a vacuum pump at the moment but I can possibly rent one from a local auto part store. I am a bit burnt out on trouble shooting for today but I will look into testing the solenoid because I’m led to believe there is no Vaccum suction coming from that line at all which is numbered 16 if I may add. as I mentioned before this only happens while the car is in motion after a short distance so I feel as if I need to be checking while the car is in drive but maybe I’m over thinking. I will get back to you on any results.
the cel illuminates when driving because that’s when egr should be active. don’t worry about the vacuum pump if you don’t have one. car idling, operating temp, just energize the solenoid manually. the idle should drop, maybe stall. if not, disconnect the vacuum supply line to the egr. energize the solenoid. you should feel vacuum at that line. if you don’t, the solenoid is probably bad
