some little things (idle again)

ASSISTANCE Stock Engine-Bay Components
1

I have a few issues and i’m trying to sort them out.

First off what is this plug for and how significant is it.

it keeps comming unplugged while driving but does not affect anything that i can see.

I have a speratic idle when the motor is warmed up and only comming to a stop. It fluctuates from 1k to 1.3k. If i rev it sometimes it goes back to 750 but other times it just goes back to 1.1k and sits there or fluctuates.

I have checked the tps with a multimeter and it is at .35 closed and it increases gradually to around 6.0.

Checked the eac valve by unplugging it after the motor was warmed up and the rpm’s dropped low. The book (haynes) stated this means the valve is working properly.

sprayed cleaner into the throttle body and greased up the spring for the throttle body.

I have cleaned the fitv by taking it off and spraying cleaner into it.

I was thinking the gas pedal cable was sticking but would that allow the idle to fluctuate?

I also have a few plugs i forgot where they went so if anyone can identify them.
(this is under the car and the plug that is plugged in is the o2 sensor)

(should i upgrade the clear tube with something stronger?)

Last thing: My car smokes lightly and not all the time. the cloud of smoke goes by too fast for me to see what color it is. I have caught it once after pulling over comming from the back of the block. I’m thinking its my sandwich plate for my ls/vtec but am unsure and its tight. My cat is covered in something sticky and clear but its not on the top of it.

i think something is going wrong near the rear of my motor.

Thank you for all help.

2

people view it and yet not one response? Anyone?

3

i’m having the same problem with the idle. then it stopped for like a week, now my car sounds like a subaru till 2500 rpms lol.

4

That plug is your knock sensor.

That green plug should be for the fan switch.

Yes upgrade that plastic tube as its not as durable as fuel line hose.

Thats def engine oil on your cat, could be coming from anywhere in front, could be sump or oil drain blowing back as you drive.

5

first, u got vacuum leaks everywhere. plug them! that will drop ur idle alot. theres one on ur intake and one on the intake manifold.

second, thats engine oil on ur cat. you have an oil leak somewhere

third, that open hole is a location for a sensor. i can’t remember which one. find out or plug it edit i searched the acura parts website and that piece thats missing is a thermo sensor. would explain the coolant spray

fourth, ur missing a clam on ur coolant hose coming off the coolant rail

fifth, replace ur pcv tube with a proper pcv hose

sixth, i think i see coolant in the last picture in the top right hand corner on ur spalsh sheild

and finally the plug with the black rubber boot goes onto the stock oil pressure switch thats on the back of the block

oh one last thing. ur tps should be .5 to 4.5-5v urs may be out of range or possibly has “dead” spots. watch for smooth increase in voltage. gradual and no large voltage jumps

6

Are you running a map sensor? I couldnt see one in the pics. It also looks like you dont have your vacuum solenoids. I would definately replace the pcv hose. If that hose collapses during use, it will effect idle. You should run your vacuum lines according to the diagram under the hood. That will drastically help your idle out. Keep us posted, good luck.

7

first, u got vacuum leaks everywhere. plug them! that will drop ur idle alot. theres one on ur intake and one on the intake manifold.

second, thats engine oil on ur cat. you have an oil leak somewhere

third, that open hole is a location for a sensor. i can’t remember which one. find out or plug it edit i searched the acura parts website and that piece thats missing is a thermo sensor. would explain the coolant spray

fourth, ur missing a clam on ur coolant hose coming off the coolant rail

fifth, replace ur pcv tube with a proper pcv hose

sixth, i think i see coolant in the last picture in the top right hand corner on ur spalsh sheild

and finally the plug with the black rubber boot goes onto the stock oil pressure switch thats on the back of the block

oh one last thing. ur tps should be .5 to 4.5-5v urs may be out of range or possibly has “dead” spots. watch for smooth increase in voltage. gradual and no large voltage jumps

the motor was done in may and i have been having the problem just started this past month.

Got the two vacuum leaks plugged.

I figured about the oil leak, guess i need to spend more time on it.

The first pic came from another motor. I should have circled the sensor i was referring to. I believe its the oil pressure sending unit. It keeps comming unplugged while driving. (you can see the plug in the second pic.) guess i should just cut the old one off and solder a new one on.

in the second pic do you know what that green plug in the front of the picure goes to?

I will check my tps voltage again perhaps with someone else holding something. (it’s kinda hard to hold the positive probe on the wire, negative probe on a ground and increase the throttle)

8

forgot to mention the leak on the splash panel is power steering fluid. Have no idea why it looks green in the pic but i assure you its red in person.

9

ok well my guess is ur oil pressure switch plug is unplugging when the engine is tq’d. either the wiring isn’t routed properly or the plug clip is loose.

the green plug should be going to the knock sensor. are you getting an engine light with it unplugged? if so pull the code which will help locate the sensor that isn’t plugged in.

about the tps. just back probe the sensor and u shouldn’t have to hold ur voltmeter probes. then just lay the voltmeter on the valvecover (or anywhere flat) and operate the throttle plate. doing it this way will allow you to have both hands free of holding ur voltmeter.

oh almost forgot, the oil thats burning onto the cat and picking up road dirt could just be from the p/s leak. clean the area and check over everything with a good light and u’ll find the source. often though u’ll have to fix one leak to find the rest

10

forgot to mention i have no cel’s and its ls/vtec meaning no knock sensor and ls harness.

The rack is leaking ps fluid. when i can fix this i will clean the cat and check again in a few days. it does burn something but i have no idea what. i have smoke comming from under the hood and from the tailpipe. friends have told me the smoke from the tailpipe is only when i get on it (reving up towards 6.5k)

I really appreciate all input so far. thanks guys.

11

I have changed the pcv hose from the clear one in the pic to the original one that came off my ls motor. The idle seems a little more stable but still really high.

Got another question:
would the pcv system affect the idle? I think tonight i will rip the entire system out of the car and check it over. I think this is where the smoke is comming from.

12

You need to read this post it will help you.

http://www.g2ic.com/forums/showthread.php?t=42969