first and foremost i have searched and have not found what i need! i have a obd1 gsr swaped into my factory ls integra and its throwing a code 22 (vtec pressure switch) and not letting me hit the vtec switch over but hits rev limiter where vtec should be. i have checked the oil level and its a little on the high side so i should have enough oil to supply presure. the vtec solenoid and pressure switch were replaced at the time of the swap so they should both be good and clean, so im thinking its in the wiring/ecu. can any one point me in the direction of some pinout pictures or diagrams with lables for the vtec system, or any other problems or conditions i might have that will throw this code.

also i only have the stock ls ecu to test with but also have an aem ems if anyone knows a way i might be able to trouble shoot with it?

 

well i found a diagram of the pin out for obd1 honda's (assuming its the same for a p72) and it looks like i have it wired correctly if the daigram is correct, but still throws 22 can anyone inform me about how to go about testing the pressure switch or what voltage it should read and when it should read it?

 

using am ohm meter you need to check that the VTP sensor and the Vtec solenoid wires have continuity all the way to the ecu. if so, and you are positive that you are not having an oil pressure issue, then I would say you should replace the ecu or have it chipped to remove the VTP sensor. If you need it chipped, I can do it for you. lemme know what happens

 

allright i checked for continuity between the vtec pres. switch conectors ground and body ground and i have continuity and i checked from switch conector to ecu conector and have continuity so i think i might have an oil pressure prob. i put a fitting into the hole right in front of the vtec solenoid and ran a short line to a oil pres. gauge which i am pretty sure should read some kind of pressure when i cross into vtec( correct me if im wrong) now i AM seeing oil in the line to the gauge but no pressure on the gauge at all, so i dont know if this is because the ecu wont let me go into vtec or if its not going into vtec because of a pressure issue

i checked my oil again and it is pretty high, id say too high, could this cause a pressure problem or should i check somthing else.

also how do i bench test the switch itself to see if it is at fault ???


Modified by got wide at 9:28 PM 3/26/2007

 

bump come on i searched this and found several people with a code 22 someone has to have some idea of what i need help with

 

hook the oil pressure gauge up on the back of the block where the oil sensor is. Also if the ecu is stock it will not turn on vtec if the speed sensor or engine coolant temp sensors are giving false readings.

BTW. if you are trying to do all of this on a stock ls ecu that is your problem. The ls ecu does not have the internal hardware required to turn on the vtec solenoid. so you either need to get the ls ecu converted for vtec or get a vtec ecu. otherwise you are wasting your time.


what ecu is in your car P72 or P75??

 

ok can anyone help with a pic of that oil sensor location or describe where its at? and that port should have oil press. at all times, not just at vtec correct? and will the pressure change in vtec at that port

if i lift the front wheels off the ground to let them spin (to get wheel speed) and let the car warm up (to get a correct coolant reading) can i test the switch or connector to see if its getting the correct voltage to open the switch, i so also have a abs speed sensor code on the pass rear could THAT bad speed signal cause vtec not to engage (but i dont think so cuz there are seperate computers right?)

and i completey understand that the ls ecu has no vtec function i just meant that i had one in case i could maybe test an oil pressure problem with it. i have only used the stock p72 so far but as stated above i do have an aem ems if anyone has enough experience with it i think there is a way i could probably test with it, im just kinda nervous messin around with it with just a base map programed but i cant get it tuned till i figure this vtec **** out. more help pa pa pa lease.

 

it sounds like you're hitting rev limit when you hit vtec, right?

and when you tested, the pressure gauge showed no pressure, right?

you're vtec solenoid is not getting the correct oil pressure, I had that problem on my car when I first put my turbo on- too much oil was being sent to the turbo, starving everything else. make sure your oil is topped off and get a cheap mechanical gauge that you can hookup inside the car. drive around and watch it. i believe startup it should be at pretty high psi (80 i think), then once the car is warm it'll drop down to like 20 when idle and slowly up to like 50 or 60 while driving. my guess for the problem is you're oil pump or the oil is congested somewhere.

 

sorry for any confusion but this is "got wide" this is my usual user name.

ok i just changed the oil and took off the vtec solenoid and it was as clean as new but the oil was pretty black and i drained about 6 quarts and put back five. i did notice a shallow indentation on the oil pan where the sump pic up is. now do you think that the indentation could cause a pressure drop enough to stop vtec but still oil the engine, or is it more likely to be somthing else. also will the new oil clean up the oil passages/pump after driving a while and let vtec engage (i havent driven it since o/c, ive been trying to figure this out before driving it any)

also when i clear the code (ive pulled back up fuse and batt cables) and start the car back up i get the code right away, so doesnt that point to the switch itself or at least the switch circuit instead of a pressure problem??

 

bump for the guys still awake on the west

 

moved and renamed for more responses since i kinda got off topic sorry for the multiple posts but i need to fix this ****


https://honda-tech.com/zerothread/1942635