a few days ago, i realized that my car was running rich and hence all of the black soot on the rear of my car. it was bad.

went to go get the car retuned at T1 and was confirmed. the tune was perfect was something wrong with the components of the car.

it turned out to the the purge solenoid. this solenoid hold in the fuel vapors then releases it into the engine and burning it etc etc. well the solenoid was dumping fuel as well. there was fuel in lines and not just vapor.

just wanted to share just in case you all ran into that problem or something.

PICTURES ON POST #16

 

Nice info bro I'm pretty sure this will help allot when they to come into a problem such as this , but honda-tech is filled with haters that think there cool so they won't reply back but never the less very nice info ..

 

thanks.

more info that i remembered. OBDI ECU are not made to control this solenoid thus you cannot use your hondata or whichever ECU you have to fix this. the only way is to remove it. you will not throw any check engine lights, maintenence required, etf.

 

wait...if the obd1 tune doesnt read that solenoid...how does it effect the car in any way?? since its not even reading it?

 

the solenoid was messed up. instead of just drawing in vapors, it was drawing in fuel and putting it into the engine as well as the extra fuel which caused me to run rich. the solenoid opens at certain rpms to ensure that it burns the vapors.

the OBD1 does not tune that solenoid so it has no control over it. it constantly runs.

although the ECU cannot read this solenoid and/or control it, it reads the A/F ratio which is being caused to run rich because of the malfunctioning solenoid.

hope that answers some questions

 

+ 1 i have been searching the shaved and tuck bay threads and engine managment threads looking for info on this i am running s300 on a obd1 ecu and since its not working its coming out

 

ok so do we need it if were runnin s2 or 300 on obd1?

 

this sensor is not needed. it is a waste of space. it includes a hose to the motor, purge solenoid, then another hose to the box that controls it.

i mean if you arent having problems then by all means leave it. its a hassle to take out the box which is below the intake. the purge solenoid is easy to take out. its attached to the firewall just to the left of your intake.

you do not need any of it. you will not throw a check light. i talked to Tony about this and he says he takes it out of every boosted car and no check engine light or anything.

the reason why it wasnt taken out of my car was because i had my JRSC put on locally here and they did not take it out which is not wrong.

if someone wants to post an engine bay picture i can circle it if those who do not know what it is.

again i only took it out because it caused me to run rich. not everyone will run into this problem. its just one solution if your tune is correct.

 

i am running rich as well and i am in between the O2 sensor and possibly something else, so i guess this could be it, the purse solenoid valve.

just to test if it is the purse solenoid, would you just take out the hose from the intake manifold and just plug it?
in theory this will stop if any gas liquid or gas will flow in the intake manifold correct?

 

yes please can someone post a picture this will help me and others thanks

 

yes that is what we did. we unplugged it from the manifold then reran the car on the dyno and found that that was the problem. i will post my cars pic when i get home of where it should be.

 

more info:

the purge solenoid opens at high rpms. at low RPMS on the dyno, i was not shooting out black soot or smoke but when it hit 5k, my A/F ratio dropped from te 14's to the 10's.

if anyone sees that any of my information is wrong please correct me. this was the first time i have seen this happen and am recalling everything that i have learned from the incident.

thanks

 

I would like to see a picture. Someone please post it. Also i would like to see what parts exactly should be removed.

 

I know you're running a jrsc on your itr. I just got my gsr jsrc tuned as well. I may be having a similar issue. Please post pix

 

My car is bone stock, but running rich at high RPM too, and leaving a nice soot layer on my rear bumper. Its a 98 ITR with 85,000 miles. I'm going to replace this solenoid and see if it fixes my issue too. Will post results next week. Thanks for the great info here guys.

 

ok here are the pics.

this first pic is where the control unit for the purge solenoid is suppose to be. obviously its not there but here is a pic of where it is suppose to be. the holes are where the bracket goes that holds the control unit.



in this next picture is where the actually solenoid is. i did not take it out. i just disconnected the line that goes to it. im not sure if you can see in the picture but there is a nipple for where the hose is suppose to run to the control unit. if you look closely on your car, it says PURGE.

 

For those who were running rich and replaced there solenoid, did it help??
Thanks

 

props for some good info

 

very good info. I noticed a different smell from my exhaust in vtec after my switch to obd1. So based on the quote above my question is... I'm on a DIY street-tune and my concern is if i were to remove this now, would it throw off my tune causing me to re-tune? My tuner is in IL and i'm in KY, so if it will affect my tune then i will leave it.

 

Nice - I will check mine as my black R runs rich also

 

Good info. Might wanna blur your VIN.

 

I AM NOT A TUNER. This is just my analysis and opinion on the tuning. I do not think the EVAP/purge solenoid removal will affect your tune. This is because the fuel that is released is minimal. It is only SUPPOSE to be vapors in which at high RPM's, they just evaporate.

In my case, my solenoid malfunctioned and was releasing in more than just fuel vapor but more fuel itself.

 

I guess the key word is Malfunctioned.
Another question that is open to anyone, but if i were to remove this unit, would its need to be reinstalled to meet emission standard upon reinstalling my obd2a ecu?

 

any help to my question? Just curious... i know its all theory right now.

 

see i am not sure. you will not throw any check engine or and codes.

we do not havev emissions where i live so i do not know what they do when they do an emmissions check.

if they run a diagnostic then you will not fail it seeing you dont throw a code.

hope that answers your question or if anyone else please chime in please.