problem with idling after h23 to h22 swap. - Honda Prelude Forum

Zelude · 01-29-2003, 08:28 AM

i just put a JDM h22 into my si h23, the car is running ok!! but whatever the car is idling, the engine starts panting. or surging or breathing heavily( sounds loud&queit, the tachmeter needle going up and down), the car start having this problem once it gets warm up. does anyone know what the problem is? please let me know any possiablity you can think of, help me guys!!!

willmbrk · 01-29-2003, 09:14 AM

Kinda sounds like a vacuum hose problem

concLude · 01-29-2003, 09:41 AM

i have the same problem on colder days, i checked my vac system and all seems well, goodluck

red92s · 01-29-2003, 11:42 AM

Does it only do this when you come to a complete stop?

LudedudeSi · 01-29-2003, 12:08 PM

Ive been having this same problem for about a month. it only did it when i came to a complete stop but now it seems to do it sometimes when i have the clutch pressed in and im just crusing. anyways i would like to hear some more info on this problem because its not fun at all!

Zelude · 01-29-2003, 12:28 PM

guess what guys..my car just broke down on the road...i'm so mad now..

to red92s: my car does it whenever i press the clutch all the down. it does that when it diles.. and when i shift to nentral

LudedudeSi · 01-29-2003, 12:34 PM

Sounds like the same problem for sure. i have replaced the iac, checked the vacuum lines, and reset the ecu and my car is still doing it.

red92s · 01-29-2003, 12:59 PM

I guess mine does that SLIGHTLY, but I also have no o2 sensor installed and havent reset the ECU in a while. A lot of people have this problem after going to a JDM H22.

Zelude · 01-29-2003, 01:08 PM

oh really?? i guess i have the worst luck...my car now is broken down on the road waiting to be towed...i wish i had post a topic like this( does anyone have any problem after swap h23 to JDM h22) before i bought that jdm engine.. anyone knows how to fix this problem..there must be a way to fix it...help me!!!!

fourthgeneration · 01-29-2003, 01:16 PM

did you put in your coolant exactly as the helms tells you? you might have a ton of air bubbles causing the surge. I would either bleed out the air, or completely drain the coolant and try again.

I had that same exact problem when I put my head back on my h23, I tried letting the air bubbles out and it still happened. After that I drained the coolant and did it over and it doesnt do that anymore. good luck

Zelude · 01-29-2003, 01:23 PM

i don't have the helm yet...but i ordered it last week...hopefully get it by friday..so how should i put the coolant in?

LudedudeSi · 01-29-2003, 01:45 PM

Would it do this if my radiator has leaks in it? ive removed the radiator cap and it didnt help so the only other thing i can think of is order a new radiator.

concLude · 01-29-2003, 03:00 PM

i just patched up my radiator with some glue stuff, and it happens anytime im in idle, so either cruising or when the clutch is pressed all the way in.

AlexLude · 01-29-2003, 03:17 PM

Seee.. that's why you gotta stick with H23A1... don't fix it if it ain't broke! NOt meaning to be that kinda person.... but i'mma stick with my torquey h23a1

- Alex

red92si · 01-29-2003, 03:59 PM

I had the same problem, and it turned out to be trapped air in the cooling system. Luckily, all I had to do was pop the rad. cap and let it sit a few minutes... and the problem was gone.

LudedudeSi · 01-29-2003, 04:17 PM

So would yalls guess be that its the radiator? everytime i pop the hood there is fluid everywhere. could it just be the cap leaking?

Zelude · 01-29-2003, 05:05 PM

i've just done towing my car...so this problem is related to the radiator?

concLude · 01-30-2003, 04:59 PM

update? anyone find any other causes besides just the radiator and fluid?

Zelude · 01-31-2003, 01:11 PM

i found out why my car was doing it...it was a vacum line that wasn't hooked up..located on the back of the intake manifold(drive side)

kennethmina · 02-02-2003, 01:43 AM

i am pretty sure is the vacuum hose of your Pressure Regulator wasn't hooked up..

coz it happened to me once i tried to install my nitrous, ZEX kit, and I forgot to hook up that fuel pressure regulator and it did that to me.. very embarassing...