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if anyone can tell me wha this is it will be greatly appreciated, and do i need it like what does it do.

 

Manifold Absoulte Pressure sensor ( MAP) It actually has MAP written on the top of the sensor.

Very important, yes you need it, you should be throwing a code without it. plug it back in.

 

Its my h22a that i have recieved from japan not in yet just doing the swap now. Do all h22 have them because i ordered a h22 harness will it work with the harness i bought or what im alil confused about this situation.

 

lol uhhh all H22's and all Honda's and fuel injected cars have them.

You sure you are capable of doing this swap on your own? There is shitload of other sensors you probably dont know about as well.

Seek the help of a professional or someone who has experience with Honda's.

 

so far thats the only thing i was stuck on because i have never seen a h22 before because im 16 and this is my first car,I have a 1992 prelude si and so far the swap is going exellent with no problems.When it comes to the wiring i have many older friends that have done swaps and are capable of helping me thanks for the help i really do appreciate it.

 

you will find your MAP sensor mounted to the middle of the firewall on a 4th gen.

5th gen's got it on the throttle body.

is that an 'A4?

 

you finish the swap yet?

 

All MAP sensors are on the mani. They measure Manifold Absolute Pressure..... Yeah its basically what tells your car the percent engine load being put on it. Without it your fuel injection system wont run Period. Why do people do swaps or other things without any mechanical knowlege. I dont go do surgery on myself cause its free.... also make sure you put your computer grounds where they need to go, seen some cars run fuctup from kids putting ground straps on painted surfaces like shock mounts....hilarious

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4.6LJeepXJ &raquo;</TD></TR><TR><TD CLASS="quote">All MAP sensors are on the mani. </TD></TR></TABLE>

wrong. not all map sensors are on the manifold. the stock place for usdm 4th gens is mounted on the wire wall with a vac/press tube connected right on the TB

but the rest of your post was correct