This swap has made me spend more than i should i belive! Im down to one problam left I HOPE! Its the map sensor! The accord map sensor is different than the prelude map sensor and connect different as well. Now the question is What is the Wire diagram for the map sensor So i know what wires hook into what? There are only 3 wires. IF anyone knows any answers PLZ let me know!

 

can you post a pic of both sensors as the early usdm h22 had the map on the firewall and the newer style was on the throttle body

 

The accord is a 92 model and the map sensor was on the firewall and the prelude map I ordered was for a 94 and im sure it would have been located on the firewall
Is there any other sensors that would cause the map sensor to come up on the check enginelight?

 

if both map sensors are on the firewall then it should be fine if the computer is complaining about the map sensor theres 2 codes 3 and 5 one is electrical and the other is piping problem if it's a electrical problem then I would check your wireing...

 

What do you mean by piping problem are you meaning exhaust or something else? and how do you know which one is electrical 3 or 5?

 

the pipe is the vacuum hose going to the map sensor as for the codes i'm not sure which one is which I just remember theres 2 map codes as I don't run into many map sensor problems .

 

Hey man i really thank you for the help you have givin me! I will post if i need anymore help.

 

does anyone know which 2 wires of the 3 on a obd1 prelude map sensor harness is the positive and which one is the ground?

 

be carefull with those wires as it's a 5v system 3 wires one is ground the other is 5v the last is ref. voltage you have to trace the 3 wires back to the ECU and make sure you didn't switch the TPS plug for the MAP as they will plug into each other and are close enough to mix up on some cars.

 

ok now can anyone tell me which one of the 3 wires is the ground and which one is the positive and the neg