- Sep 10, 2003
- 11
- 0
- 0
Here is my problem i have a 90 GT 5.0. Mostly stock right now with bolt on's pullys, intake, exhaust.. I live in california and have to pass the smog test out here. I pulled codes and they say the air management valve and the egr has lack of flow. I have replaced the 3 solenoids on the pass shock tower, checked all vacuum lines and all are good..If i put vacuum to the egr the engine stubles so i know the erg valve is good. I have tested all sensors and they are with in spec. TPS, MAF, Egr Position sensor.. If i put a vacuum guage on the line comming from the egr vacuum solenoid and snap the throttle and get no vacuum what so ever.. I should have atleast 5 hg.. right
I have check the ref voltages to all the solenoids and all at 12 volts.. I pinned the otherside to the computer and they all ohm out fine... I also just cleaned/replaced all the grounds in the car. I am lost on what i should do next i have searched on stangnet for the last 2 weeks and tried every little thing i have read and no luck... Other than that the car runs well for the stock motor. I have noticed some pinging when i get on it latly i figure it is because of the egr valve not working. also i have no check engine lights on. any help would be greatly appriciated. I just need to pass smog one more time then i can toss in my 331...
I have check the ref voltages to all the solenoids and all at 12 volts.. I pinned the otherside to the computer and they all ohm out fine... I also just cleaned/replaced all the grounds in the car. I am lost on what i should do next i have searched on stangnet for the last 2 weeks and tried every little thing i have read and no luck... Other than that the car runs well for the stock motor. I have noticed some pinging when i get on it latly i figure it is because of the egr valve not working. also i have no check engine lights on. any help would be greatly appriciated. I just need to pass smog one more time then i can toss in my 331...