General engine questions/issues that aren't specific to the other categories
User avatar
By OleFolk
#228747 Yeah I drained all the coolant and replaced with just over half
It warms up and stays warm better now
But I still have a pulsing idle, and pulsing rolling idle which is [smilie=BangHead.gif]
User avatar
By OleFolk
#229247 You know Id hate to jack this thread
Id prefer to do so then to make another idle thread

There really should be just one thread on all diagnosis for idle's

My idle continually pulses from high to low rev
Even on a rolling idle it will pulse and jump the car forward then stop ect.

I drained all my coolant, replaced with honda coolant
checked all my lines so its not a vacume leak
I just dont know :?
User avatar
By lsvbeghatch
#229254 have you cleaned the iacv or tried a new tps sensor make sure you bleed the coolant as well considering coolant is mainly what runs your iacv let me know if any of that helps
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By OleFolk
#229280 Ah that might be right then
Im using a D15b7 tb because when I got my D15b its tps was broken

Il get under the hood today and get back to you thanks man :D
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By lsvbeghatch
#229359 No prob haven't been into hondas for decades or anything but I swear to you every imaginable prob has happened to me so I know what fixes it lol
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By OleFolk
#231628 Ok so since my recent post this is what I have done

I went to pull-a-part and got a full D16z6 intake manifold
Fuel rail, pressor regulator, TB, FITV, TPS and injectors all for $25

I removed my IACV and cleaned it, Didnt fix pulsing idle
Some resurch and found out it could be the Fast Idle Thermo Valve which is under the TB

I removed the FITV on my D15b and the screw inside was not threaded in, completly loose which should explain my idle.

ALSO when I removed the hose that connects to the FITV itself, Coolant leaked out..

Is coolant supposed to be in the Fast Idle Thermo Valve?

If coolant is not supposed to be in the Fast Idle Thermo Valve does that meen I have a blown head gasket?
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By lsvbeghatch
#231633 Inside the throttle body two holes are present place your finger over the one on the right and if the idle surge goes away fast idle is the issue (which is ran off of coolant so the coolant in it is normal) you can try cleaning it but I suggest replacing it they are ran off of wax that heats up and causes it to close to make the idle normal it will wear out! Hope it helps lemme know
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By OleFolk
#232510 lsvbeghatch thank you so much

I covered the right hole and the surging idle stopped
So I took the FITV off of the junkyard d16z6 motor and put it on the TB
It was a PITA because I didnt remove the TB and did it at night
the FITV is under the TB had to climb on in to my bay to get it
But my idle is fixed thank you your awesome :woot:
Last edited by OleFolk on Mon Jan 10, 2011 7:19 pm, edited 1 time in total.
User avatar
By lsvbeghatch
#232511 no prob at all man