ok lets start by, I swap An H22A jdm Manual tranny, To a 97 accord Ex Same as 96 accord. heres what I did, I converted to obd1, I had a Hard time finding a p13 obd2 from 96 prelude, Well when I finish the swap I got a CEL 21 vtec pressure switch, GOT IT FIX, then no cels, while driving the car I got a Leak somwhere Rpms where going up and down, car was running like **** when accelerating it feel like a single cam with NO vtec going 20mph at 4th gear, But when my H22a hits Vtec dam is fast, well while driving I got a cel, then turn of the car, then turn it back on, No cel. well I drive it again then got a cel I chek it with car On it was code 12, , I replace the Egr and Gasket, car started to run Beautiful And smooth, After driving it for like 10 minutes the car star to do the same thing, then got the Cel ligth back on, car was running again like ****. What can it be I replace the EGR and gasket, Oh also I got the Leak again, high and low rpms. on the obd1 accords you have to switch the A11 and A6 pinouts But they told me that on obd2 accord you dont have to do that pin swap, Tanks for your help, I have been searching Alot but no luck, thats the reason of my new topic, Tank for your help

 

Check the egr Vacuum solenoid by the drivers side shock tower.

 

Only the 94-95 accords need to switch the pins so you do NOT need to switch any pins. If you did, just put it back to the way it was. Just for the hell of it you should have the online manual for both cars...the 97 accord ex and the 96 prelude si vtec. Then look at the wiring of both cars and see if the wires line up the same for the egr valve. I'm confident they do, but if not then that could your problem. You can use either "alldata diy" or "mitchell on demand" .. do a search for "coupon codes" for both sites. You can get a 15 -25 percent discount. They're pretty cheap. I hope you have ran the knock sensor and iab wires and your vacuum hoses are all correct. If your egr hoses are incorrect that could your problem too.

 

Yea The egr vaccum house was backwars on the sensor by the driver side, iput them the way they go, also I saw the alternator was all the way clockways, I put it rigth on the middle, car star to run smoth, after driving it like about 15 minutes I got the vacuum leak agai, I cant find it anywhere, I DONT have any CELs


EDITED!!!! GOT THE EGR CEL AGAIN

 

Spray some Carb cleaner on all the vacuum lines and if it idles up or down your leaks in that area.

 

Why not just do an EGR delete?

 

Got the vacuum leak fix, It was the seals that holds down the valvule cover, EGR delete na im good, I rather fix what its causing the egr code, when I drive the car for like 10 minutes I get the egr cel, then if I turn off the car and turn it back on in that same moment the cel desapears, then again ill get it when driving for 10 minutes. anyone with same problem. BTW car runs strong today I killed a 03 or 04 mustang GT like for 3 cars

 

update, I can let the engine on like for 20 minutes without moving and the egr code wont apear, also I can drive it under 3000 rpm and also it wont apear, but when I get on the freeway at 60 mph in 5th gear the ligth comes on anyone

 

Clean your EGR ports.