pulsating idle

[solito_yo]

ok ladies and gents, I have this pulsating idle it pulses between 1000 and 1500. I thought it was an exhaust leak. nope. fitv was deleted. I put a new tps, new iacv, last year from az. it went away when I deleted fitv but then it came back took the IM apart and resealed. it starts fine, but then I drive around push the clutch in and brake to slow down then it starts to pulse. oh this is all on an H22a. I have no clue what else to check.

[hotrodj]

Check for vac leaks. Mine is leaking at the intake mani to head seal, the person who owned the car before me tried reusing the intake gasket when he install the new motor.

[Learners_Permit]

You might also try cleaning the IACV. I did that with mine and it worked.

[solito_yo]

ok So I disconnected my IACV And nothing happen so readjusted my idle screw to base. Plugged in the IACV and it went back up to 1200 rpm. Took it out for spin and did it again.

[Learners_Permit]

http://www.cb7tuner.com/vbb/showthre...29)%20%20%20k5

Here is the tutorial I used. I hope maybe this could help out more. If not I'm sorry.

[7cb7]

Check your coolant level

ok ladies and gents, I have this pulsating idle it pulses between 1000 and 1500. I thought it was an exhaust leak. nope. fitv was deleted. I put a new tps, new iacv, last year from az. it went away when I deleted fitv but then it came back took the IM apart and resealed. it starts fine, but then I drive around push the clutch in and brake to slow down then it starts to pulse. oh this is all on an H22a. I have no clue what else to check.

Try checking your coolant level. I know it sounds wierd, but I had this issue on both of my cb7 Accords (1993 10 year Anniversary Edition a/t, 1990 DX a/t). When the coolant temp sensor relays inconsistent readings, the engine will serge as you described. Let me know if this helps at all. (Make sure you wait until the engine is completely cooled, obviously lol)

[solito_yo]

Coolant is good

[solito_yo]

ok this is an update I cleaned out my IVAC and EGR. and spayed carb cleaner on all vac. lines and manifold, tb, and even seafoamed the system by vac induction and in the fuel. And the problem is still there with erratic idle( surging idle, pulsating idle). I need some serious help. Or more info on this.

[deevergote]

Maybe you should reinstall the FITV.

[oyajicool]

Coolant level may appear normal/full at the filler neck, but the system may have air in it. Which may cause idle speed surge issue. So, make sure that here's no air in the system by opening the bleed valve while the engine is cool.

[Guero112]

Coolant level may appear normal/full at the filler neck, but the system may have air in it. Which may cause idle speed surge issue. So, make sure that here's no air in the system by opening the bleed valve while the engine is cool.

When the engine is cool or warmed up atleast one cycle? i've frequently read to properly bleed the cooling system you must wait until fans come on after initial start up. that way you know the system has reaach a full cycle..

i ask because i also have "bouncing" idle. i followed all steps to check for cause. even took apart the intake manifold and hand cleaned it pretty good.

im out of ideas..

[oyajicool]

More than likely you'd need to follow the instruction #8 on.
You want to start doing this while the system is COOL or there's no pressure build up in the system to avoid injury/burn.

[solito_yo]

Thanks for the info on coolant bleed. I did it about two days ago and it seemed to work, but I will keep you guys up to date.

[ShiroiKinCB]

Does the EVAP have anything to do with it?

[solito_yo]

ok well went to school this all was good until I pulled into the school parking lot and it started bouncing again. Shut it off, On the way home it did fine all the way home?