Ok, pre obd b16, nothin much done to it. HKS air intake on a b16 eg intake tube with that funny resonator thing on it that looks like a J hook.
XsI swap to be exact, missing throttle smoothener, and plugged off the other piece that goes into the intake manifold.

Valves were done too tight, so I loosened them. About a year of driving tightended them up?!?!

.006 on intake and .007 exhaust. I checked like 5X on each to be sure. Left it where gauge could drag with resistance, but not too tight. Idle smoothed out good, but when the eg intake tube went on today, tonight I let out of gear and it idles down, then lopes up to like 2k, once or twice and is fine. It didn't do this every time, just sometimes...i dunno, vacum leak somewhere. It was dark. Car pulls fine, nothing too exciting in this heat and a weak clutch (dangot)

any ideas?

 

If you think there is a Vac leak grab some WD-40 and spray that **** around until you hear your idle run up. Try pluggin those vac hoses into ur orig intake and see if that fixes it. trail and error that guy. When did it start? did you change or do something different?

 

Sounds like your TPS is not reading the air/fuel correctly. Could be an o2 sensor also.

Check your TPS, or MAF sensor and see if they are working correctly. You can use an ohmeter on your TPS to check for 5v and resistance on throttle open/close, and you can check your MAF (i believe you should have one) and see if the sensor is dirty... Not too sure about the MAF though.

When it idles up like that, something is reading air incorrectly and trying to adjust your idle mixture settings. Check that your o2 sensors are clean and you didnt get **** like antifreeze on them or something that would cause misreadings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Keebler &raquo;</TD></TR><TR><TD CLASS="quote">Sounds like your TPS is not reading the air/fuel correctly. Could be an o2 sensor also.</TD></TR></TABLE>

TPS is throttle position sensor... o2 sensor sends the "air/fuel" signal back to ecu...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Keebler &raquo;</TD></TR><TR><TD CLASS="quote">Check your TPS, or MAF sensor and see if they are working correctly. You can use an ohmeter on your TPS to check for 5v and resistance on throttle open/close, and you can check your MAF (i believe you should have one) and see if the sensor is dirty... Not too sure about the MAF though.</TD></TR></TABLE>

no MAF sensor....
you have the right idea with the TPS though...
set the TPS to between 0.45-0.5V fully closed and 5.0V fully open. if it is set too low or too high on idle it will cause a surge. just find were it idles best for your combination...between the 0.45-0.5V.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Keebler &raquo;</TD></TR><TR><TD CLASS="quote">When it idles up like that, something is reading air incorrectly and trying to adjust your idle mixture settings. Check that your o2 sensors are clean and you didnt get **** like antifreeze on them or something that would cause misreadings.</TD></TR></TABLE>

o2 is in the exhaust...if theres coolant on it you have more problems then just a surging idle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EH3B18B &raquo;</TD></TR><TR><TD CLASS="quote">When did it start? did you change or do something different?</TD></TR></TABLE>
When I changed over to a eg b16 intake rubber tube. I had to plug one thing up.

That's with the old rubber tube, now both of those are plugged up. I'll check for connections etc when I get back home. So it doesn't sound like I did something to the head, that's good at least. I don't think my o2's could have gotten collant on them b/c it's stock manifold, but i know they're old as the motor is.

 

I think the part circled in red is where your problem is. the intake tube is not a closed circuit, so the engine is pullin vac from there, but it's gettin more air from the filter (green line/arrow).

Find another vac source (FPR ?)

-Mike

PS: Nice battery tie down


Modified by crx_88_si at 11:56 AM 5/12/2004

 

^ is correct

 

Just to be sure, let's say that the part you circled in red was just plugged up right where it comes out the intake manifold....and the part on the rubber tube isn't there. (which is how it's setup now)

I asked my acura tech friend, shop foreman, Acura god etc...and he said something about the idle screw, but i don't think it's out of wack. I haven't touched my 02 sensors but that may be it also right? I didn't see anything out of the ordinary and since it only does it when it's warm and not every time I dunno, I may just put up with it until it gets worse, no CEL.

 

Maybe a simple ECU reset?

Sounds like something is sticking for a moment and then unsticks. Tps would be my bet.

 

well i am not sure wha the one that you circled does? but i just cut the line short and capped it off and it runs fine..

 

I dunnno guys, it ain't doin it no more, so who knows....weird pre-obd motors

 

Yea it looks like that sensor needs to be tee'd off something on the intake mani...after the tb