hello everone i have a 93 prelude(H22A1) and its idling around 2k rpms i tried adjusting the set screw and cable tension but nothing happens. The guy that sold me the car told me that the dealership said that it needed a vtec solenoid and an idle air control valve. the car will hit vtec everytime i can get it to 5k but sometimes berween 3k and 4k the car will act as if it has no power and the intake will get really loud then if i can get it out of that stage it will run fine and hit vtec everytime i get it to 5k. I have checked oil level and cleaned the vtec solenoid. there is one small vacum hose thats disconnected and i dont know where it goes and the map sensor was unplugged when i got it and plugging it back in did nothing. I dont know what to do if anyone could help me i would really appreciate THANKS

 

the vacuum line you found disconnected is 1 end still attached if so what is it attached 2 it also seems strange the the map sensor is unplugged is the car standard ?

 

as far as standard do you mean manual tranny

 

yea its a 5 speed im not sure if the motor came in the car or not its a 93 si but the side of the head is taged with japenese righting... if i plug the vac line in it runs worse and im having a hard time believeing that the vtec solenoid is bad i cleaned it and it works every time.. as far as my problem starts at 3 grand(rpm) and goes from there. if i run the car hard there are no problems until i get to 60mph then its almost like a fuel cut you push the gas it revs a little but goes no faster.. im starting to think its just the air idle control vaulve tricking the computer however it does idle at 2thousand rpm and thats also what the kid told me was bad im trying my best to explain lol but the problems i have are complicated.

 

clean your iacv and fitv

 

ill take it off and clean it and see where that puts me im starting to get angry and just put a single cam motor in thr damb thing ill try that and post back if that works for me i have a 2002 mustang gt with alot of bolt ons and its twice beter on gas i filled the lude up with gas and drove like 50 miles and its empty when you drive it all you smell is fuel there are no leaks at all would/could this be from the aicv?

 

But then you have to drive a ford

 

check your fuel pressure. high idle could be a throttle position sensor, i dont know what all you honda guys call it check engine light?

 

the fuel pressure regulator doesnt use a vacuum signal does it?

 

Yes it does but this problem should have nothing to do with it. Check your FITV. Here's how. Warm your car up all the way, take off the intake piping so you can see inside the throttle body then plug the bottom left hole with a finger and if that returns the idle to normal then it is the FITV. Good luck

 

thanks man i'll try that

 

this worked for me

 

it tried covering the hole up and it did nothing the there was no suction on that hole but if i covered the top hole it would shut the car off....is this normal?

 

th vacum line that is disconnectedne end is connected to a device on right side of the motor just in front of the intake manifold, this device has the word "UP" on it, the other end just hangs there

 

is the fitv the same as the iacv?

 

Common problem - be aware that the idle speed should not be adjusted by the throttle cable. You should have a bit of slack in the cable and then there is an idle speed screw on the passenger side of the metal air inlet. It is an inset screw just a few inches from the throttle body. When the car is warm, you unplug the wire from the throttle air vavle just below and toward the driver side from the throttle cable end. Adjust the idle screw for 500-600 RPM. Plug the air valve back in.

If your idle speed fluctuates (VERY common on older cars), there is a Cold air Idle control on the bottom of the air inlet, below the idle screw. Inside is a special wax valve. The problem is usually a loose screw that lets the wax valve move around. The screw should be snug. The wax is very temperature sensitive and it expands when the engine gets warm and covers the little bleed air holes to reduce the idle speed. Simple, but effective.

 

thanks for all the info guys im done playing the quessing game with a h22 im dropping the car off at a very good mechanic monday morning to have them put it on the computer and tell me what the problem is, to much money being spent on stuff that doesnt need fixed, i was told the vtec solinoid was bad by honda but i understand they just want money the vtec works just fine everytime... looked and felt the bottom left hole in the throttle body no air being sucked... aicv is good \ to me its almost like its not fireing right less than 50 miles to a tank of gas? slugish and week around 3 thousand but fine when under 3 or above 4 if i stop and dump the clutch and run it ***** to the wall it will run perfect for the exeption of when i hit 60mph it does the gay thing it does cause the gear 60mph falls around puts it at 4 thousand rpm and wont go any faster unless i put it in 5th and bogg it down. all you smell is gas driving the car and there are no leaks? wtf? thought at first it was a swap in the car but found out today the car is a 1993 prelude vtec special edition/ turns out i guess the special eddition ones are the half *** runing ones

 

i never took the car to the mechanic i found the ecu code line and i got code 7 and 23 throttle angle.. and knock senser.. the knock senser is brand new and im guessing that the throttle angle would be tps throttle position senser. i know i can get the senser off and they go for only 30 bucks online would / could this be the problem for what i have described the car to be running like? thanks for your help

 

yes. like i said. if you can get your hands on a scanner check to see what the tps % is.