Surging idle issue accord UpDATE still surges!
 

Update:

It is possible for a motor to rev to 5000 with the throttle plate closed, if, there isn't a vacuum leak somewhere?



The idle on my 90 accord surges from 1000 - 3000. Car is all stock. Temperature isn't a factor. No cel.

Help me out with some suggestions.

So far I have replaced all the vacuum lines, the iacv, fitv, and the map sensor. And disconnected the egr and charcoal canister.

I haven't checked the alternator.

Anything I'm missing?

Re: Surging idle issue accord
 

have you taken off the throttle body yet? I would degrease the piss out of it and check the tps voltage



also give the plenum a good cleaning has well and just wipe it clean




I like carb cleaner or brake cleaner for the job



Also if there is alot of build up on the throttle bodt plate area take a piece of sand paper and clean the plate and tb. Then slam the shot out of the throttle rotor to make sure you have a perfect seal


loosen up the screws that hold the throttle plate in place before doing this



Throttle body should be liquid tight.

Re: Surging idle issue accord
 

fast idle control valve its the only thing that makes them do it period

Re: Surging idle issue accord
 

I blocked off all of the vacuum ports on the manifold and it still does it....

SO, I think that it is a vacuum leak.

Re: Surging idle issue accord
 

blled coolant has well

Re: Surging idle issue accord
 

thats the problem then the ficv is need by the ecu to regulate the idle circuit

Re: Surging idle issue accord
 

The coolant has been bleed.

ficv=?
I have tried 3 different iacv's.

Re: Surging idle issue accord
 

well its not that then



what about the egr port? Those things get very clogged and could cause some issues

Re: Surging idle issue accord
 

I haven't ever heard of an egr producing basically the same surging problem as the fitv...but I will deffinitly take it off and clean it up.

Currently its 6 degrees and the wind is blowing.

Re: Surging idle issue accord
 

just thinking out loud. Anytime I do h22 swaps thats what I do has the egr ports get uber clogged up and well its worth a try

Re: Surging idle issue accord
 

Not always.

I had idle issues with my old d15z1, and they don't have it.


With mine it was a combo of a 240k mi gunked up Intake and a nearly clogged IACV.

Re: Surging idle issue accord
 

fast idle control valve located on the front of the intake mani in the middle

Re: Surging idle issue accord
 

UP

Re: Surging idle issue accord UpDATE still surges!
 

my last resort attempt is to


carb clean the piss ut of the manifold
throttle body



make sure the throttle plate is seating correctly

Re: Surging idle issue accord UpDATE still surges!
 

I have tried 2 tb's, both have been thoroughly cleaned and the tps is the same on both...
Same problem with either one installed.

Re: Surging idle issue accord UpDATE still surges!
 

crab clean the manifold thats the last thing I would do

Re: Surging idle issue accord UpDATE still surges!
 

i am surtian that you have not check the correct valve, and your problem will continue till you fix the valve i told you to.
and a gummed up i mani will not make your problem accure period

Re: Surging idle issue accord UpDATE still surges!
 

I have tried numerous iacv's and fitv's, I have even blocked off those ports and the problem remains.

Work on your grammar.

Re: Surging idle issue accord UpDATE still surges!
 

Have you tried looking/replacing all the gaskets on your intake manifold? had the same problem and it turned out to be the intake manifold wasnt torqued to spec and was leaking air through the gasket.

Re: Surging idle issue accord UpDATE still surges!
 

what happens when you put your hand over the throttle body when its running?

Re: Surging idle issue accord UpDATE still surges!
 

yah what happens, it should choke the motor out and die and as 4 my grammer eat ---- nignog if you were my teacher in school then you have a reason to talk ---- im trying to help you and you pop off with ---- talk, i hope your ---- blows up O0

Re: Surging idle issue accord UpDATE still surges!
 

um i never said anything about your grammeeeerrrrrr

Re: Surging idle issue accord UpDATE still surges!
 

Blocking the tb with my hand and replacing the im gasket are on the to-do list.......When its not 8 degrees outside.

Re: Surging idle issue accord UpDATE still surges!
 

my garage is heated O0

Re: Surging idle issue accord UpDATE still surges!
 

no not you!! the asshat with the car troubles lol

Re: Surging idle issue accord UpDATE still surges!
 

With my hand completely over the throttle body, the engine stays running uneffected.


Intake manifold gasket.