So before this topic gets closed, let me explain:
I decided to create the thread here because
1) People seemed to be more informed here
2) Its in relation to a VQ35swap
3) I have an 04 VQ35.... so not sure if it might differ from the 02-03's

Ive been getting a MAP/BARO sensor error code 1302 for a long while and I cant get rid of it. I've checked it according to the FSM. I've checked all hoses, voltage, and the sensor itself.
I want to make sure that I have the hoses connected properly, and in a spot where there is proper vacuum....

So here's how I have it set up:
-the vacuum connection closest to the connector is connected to the intake vacuum line closest to the throttle body
-The vacuum line thats at the bottom end of the sensor is connected to a vacuum line I created in the intake tubing.
-and the other is connected to the Absolute pressure sensor

I'm also getting a knock sensor error code that, again, I cant get rid of. I've checked voltage from ECU to harness connector. I've checked ohms on both connectors, and I've even tried the resistor, but nothing!?

Can the MAP/BARO cause the knock to throw a code!? I dont think so, but i'm not an expert.


BTW, am I the only with an 04 motor in a 4th gen!?

The strange thing about this, now that i'm thinking of it, is that I dont have an EGR error code anymore!? LOL this is kunfuzing!!!

 

hello, i allowed myself to step in because I experience the same problem as you. I hooked my map\baro vacuum same way and it keeps coming in also.

but for my knock sensor problem I removed it from the center portion of the bolck and relocated it on the outer face of the block originally occupied by a egr valve bolt. never came back and it still very close to the combustion detonations if they happen.

 

Where exactly did you hook up the knock sensor!? Are you referring to where the EGR tubing went, or where the actual EGR mounted!?

I even have the knock sensor mounted to the ground terminal on the battery and it still throws a code..... i'm just stumped!

Bump for some help.. I know there's a lot of VQ35 swapped guys around that can help a fellow orger out... please

 

I have an 04 motor in my 4th gen! I don't think the Map/Baro sensor has anything to do with the knock sensor. Have you tried replacing the knock sensor the Map/Baro sensor?

 

Where the egr used to be mounted on the block. the map sensor needs to have a vacuum source before and after the throttle body. like you hooked it, dont know why it still throw codes.

 

what IACV setup are you using? Do you have cold start issues where you have to give it gas to get it running? Assuming the code comes on at startup, this may or may not be relevant, but when I first installed my 00vi, the remote mounted IACV had too long of a hose, so when the car would start, it would use the air in the plenum then choke if I didn't open the TB for a second, until sufficient air made it through the then too-long IACV hose. When this would happen, that split second where the IACV wasn't feeding the plenum air, the map/boro code would pop on. So bassiclly, is there something preventing it from getting vacuum right away?

 

The trick we used is to lenghten the iacv wires about 8inches separetaly from the tps wiring. Then, the iacv feed hose is shorten because the iacv can be located closer to the intake tract.

 

Okay.... so I tested ohms for the knock sensor harness connector from the ECU side, and its at 659.9!??? How or what would make it higher than spec!? Factory spec, according to the fsm, is 500-620 Kohms....

 

Check the square black boost sensor in the front. On your map sensor which is a brown tan harness one hose goes to the boost sensor, other go to intake vaccum and last one to the air box vac before the throttle body. Check for vaccum leaks. Did you swap over all your 4th gen sensor properly?

 

I just reread this, isn't it supposed to be: the line closest to the front of the car (where there are two together pointing up) coming off the sensor gets barometric readings post MAF in the intake tube? Whereas the one closest to the sensor (pointing up) goes to the APS, and the bottom one (pointing towards back of car) goes to a vacuum source (near TB). That's how the fsm has it, but mine was hooked up the same way yours is, I've got this same code, let me know if you figure it out.