my 93 idles up and down in Park and Neutral.

[ponso]

my 93 idles up and down in Park and Neutral. When it's in gear, all is good and seems to happen after it's warmed up a bit. I'm stomped here. I have new thermostat, air bleed coolant, new IACV, new FITV. There is no engine light or code. Also my PVC and TPS is fairly new within 1 yr and spark plugs are ok. I've checked the hoses and they all seem to be ok and hot so I don't suspect a blockage. Any ideas are appreciated.
(I'll probably check for vacuum leak this weekend)

[deevergote]

Here you go:
http://www.cb7tuner.com/vbb/showthread.php?t=53161


As found in the thread at the top of this section called "Common Beginner Technical Info can be found in here. PLEASE READ HERE FIRST"

[ponso]

thank you. I missed this one.

[ponso]

update: last night I took apart the EGR valve and cleaned it and put in a new gasket. Same issue happening. At his point I'm not use anymore and will assume that I have a vac leak that I can't find. What's puzzling is that there are no CEL and only happens in park/neutral.

[Jcallo]

update: last night I took apart the EGR valve and cleaned it and put in a new gasket. Same issue happening. At his point I'm not use anymore and will assume that I have a vac leak that I can't find. What's puzzling is that there are no CEL and only happens in park/neutral.

Look for a vacuum leak, around the intake vacuum hoses and around the engine bay.

[cb7 calling]

Even though your fitv is new maybe the diaphragm needs adjusted. When the car is at operating temp turn it clockwise until you feel resistance. I know you bled your coolant but if it happens once warmed up I think if adjusting the fitv diaphragm does not work I would bleed the coolant again.

[Mrdanbkidd]

could be egr or maybe an issue with a throttle body or iacv. when you shift to drive or reverse you put a load on the motor which will bring down the rpms to be steady. when you put it in neutral or park it will be free of resistance and cause it to surge. in my opinion at least

[Rusty92EX]

Mine did this too, i just switched out the throttle body w/ a new gasket and now its perfect.

[ponso]

I shall try the following this weekend (in order) and update:

adj FITV and posibly bleed coolant
look for vac leak again
replace throttle body gasket and check if the issue is related to the TB

thanks guys.

[Accord problems]

you're idle maybe set to high .

[Chronuss]

you're idle maybe set to high .

I can attest to that. The idle adjustment screw may have backed out of the throttle body too far. I had this problem a few years ago waaayyy before I found these forums and worked at Merchants. I set the base idle, and put a DROP of blue locktite on the threads of the screw, and that little thing has not backed out of the throttle body since. There's a thread around describing it...I'll edit the post soon as I find it.

Found the thread:
http://www.cb7tuner.com/vbb/showthre...justment+screw

[existlosangeles]

too much air being let in in your FITV perhaps.
my cb was doing the same thing, first i checked for vacuum leaks,
then i checked the IACV & FITV.
did you try unscrewing the cap & checking to see if it was loose & letting in too much air? heres a video that might help



http://www.youtube.com/watch?v=L788jKEVblY

[Boal]

Have you figure out what the problems is?

If not, i have other suggestions. Do your steering wheel shaking when in gear (revere or drive)? I am having this problem and i suspense it might need a new motor mount. Try to check your motor mount and see if it cracked, ripped in two or too soft.

[Accord problems]

Have you figure out what the problems is?

If not, i have other suggestions. Do your steering wheel shaking when in gear (revere or drive)? I am having this problem and i suspense it might need a new motor mount. Try to check your motor mount and see if it cracked, ripped in two or too soft.

what would that have to do with the idle ? the motor bouncing around and the idle bouncing around are two different thing's dude .

[ponso]

update: I found the culprit. The intake manifold to the engine gasket was cracked.