Anyone know what that connector connects to? its black on the outside and blue in the inside, i've looked everywhere around the engine to see wha it would connect too, no luck and also is that little ground wire suppose to attach like that?

 

H22a4 engine 1999 honda prelude

 

The ring is oil pressure sender, and first thought on the plug is front O2 sensor.

 

The ring on the oil pressure sending unit should be either screwed into the end of that stud or bolted on. It will throw a cel if you leave it off.

 

Are you throwing any CEL? Front o2 should be 4-wire, so not that. 2 wire could be an aftermarket oil temp sensor since it's right next to the oil filter, or possibly stock oil pressure sensor (should be throwing a CEL though).

 

The plug looks OE. I suspect it's one wire and goes to knock sensor.

 

Knock is a round connector, my guess is some random evap solenoid or something, or under the intake manifold. All of the temp sensors are round connectors as well.

Is it the VSS? Can't remember how many wires that connector is. The VSS is located on your transmission, see if you've got any open connectors on top of the trans.

 

That was my thought from the loaction as well, but every one of those that I have seen is round.

Another thought, is this car, or was it, an SH?

 

http://www.drivewire.com/vehicle/199.../knock-sensor/

obd2 knock sensor plug is not round.

 

That wire is not long enough to go on the trans, it can b a o2 sensor, ima do some reseatch jus wanna get some ideas from yall so I know wha to look for,

 

its the base model

 

And I dont see anything unplug im jus missin a sensor or something

 

Wha is cel?

 

http://www.ebay.com/itm/New-Knock-Se...item3f099d1538

Im thinking knock sensor..... right above the oil filter

 

yea it looks like it connect to that

 

how can i bolt it in becuz its jus hanging like that

 

the o-ring to the oil pressure sensor

 

ok its the knock sensor, i already installed it thanks! now how am i suppose to bolt this ring (sender) onto the oil pressure sensor, im missin something...

 

Find out the thread size of that stud and buy two nuts for it. Take the ring off, put one nut on and thread it down most of they way, put the ring on, then put the other nut on and thread it down on top so it sandwiches the ring in place.

 

haha, I was right.

 

Yea but how its suppose to thread on like that, where u think I can find that, autozone etc..

 

that oil pressure sensor is from another car with a push on connection, like a civic or integra. the prelude/accord one is different and has a machine screw that holds the ring to the sensor.

 

yea i jus found that out, stupid me, i forgot this engine was in a civic, so i was missing some sensors, i jus bought the right oil pressure switch and a knock sensor cause it didnt have one...now yall got me looking around the enigine for more mistakes LoL

 

For future reference, CEL = check engine light

 

I agree the one wire is the knock sensor. I believe the other on is to the iab solenoid. Check the wire colors...