Hi guys! I'm new to this board but I need all the help I can get on this one.
My buddy and I just just recently completed a H23A1 swap into my 93 Accord LX. When I first dropped in the motor I had that funny idle hunting crap that a lot of people encounter. So I swapped the IACV off my F22A1 motor which I know was good and I tried taking apart and cleaning the Fast Idle Thermo valve located right under the throttle body. Didn't seem to work, so I ended up disconnecting the TPS and drove around for a while and eventually I decided to try plugging it back in. Now I wasn't having the idle hunt problem anymore, but it still does some funny things. When I drive at low speeds (10-15 MPH) through parking lots in 2nd gear the car starts pulling on it's own when the revs drop below i'd say about 1500 so essentially it's still somewhat idle hunting at these low revs when the car is in gear. Also when I engage the clutch as I'm driving the revs shoot up slightly (about 250 rpms) as I'm switching gears, it's really weird. The CEL does come on a little after starting up when I start driving but I haven't had a chance to get the code read.
Anyways, I decided i'd try putting in another complete throttle body I found in a junkyard. To no avail, same problem, nothings changed. I narrowed it down to a couple things.
I'm thinking it's some sort of vacuum leak. I looked at the vacuum diagram for the H23, I have the EVAP canister from my F22 still in the car. My friend had to bridge one of the vacuum lines because the H23 EVAP had 3 lines attached, my F22 EVAP only has 2.
Now here's the question, does anyone know what the purpose of the EVAP canister is? Is it necessary for me to obtain an H23 EVAP to fix this issue?
I'm writing a whole story here so please bear with me if you haven't fallen asleep already. A few more issues I encounter on a daily basis. When I kick on the A/C the car once again begins idle hunting, not consistently though. The revs will drop and almost die out, but before it dies out it shoots up to about 1700 rpms and that is done pretty consistently when i drive around the streets waiting on lights. The A/C also begins to not be as cold when I get off the highways, when I'm on the highways A/C is fine, still not as cold as it should be but sufficient to run with no issues. It's just when I bring the car to a stop the issues come into play. My analysis of this problem: I'm thinking I have a bad condenser fan, i don't think it's kicking on, but i don't think it's the cause of the idle issue. I did charge the system with a DIY A/C kit and there are no leaks, it holds the charge.
Third and final issue I'm writing about is my car seems to be blowing black smoke upon near redline revs, particularly on close to redline shifts, when I make that shift before redline a puff of black smoke shoots out my exhaust and now the back of my white accord is starting to look like a lemans race car. (Kind of a cool look, but a biotch to clean off) I'm not sure if it's just fuel burning out the tailpipe or is it oil as well burning off as well because that's the other thing is that I have to fill up on oil every 1.5 to 2 weeks, i think there is a leak as i notice my transmission is covered in oil so i'm not really sure if the oil is being burned through the exhaust or is it just leaking out near the distributor cap. I recently pull a whole new head gasket kit in because my JG port and polished head was damaged and had to swap it out for a stock head. So i don't think any of the seals are bad.
Oh yeah I forgot to add, when I pump the brakes at a standstill without a/c on, the car idle hunts a little until I stop pumping. Some kind of related vacuum issue.
For some reason I feel like these issues are all related to each other some way some how but I'm not absolutely sure. Any insight would be grately appreciated.
My buddy and I just just recently completed a H23A1 swap into my 93 Accord LX. When I first dropped in the motor I had that funny idle hunting crap that a lot of people encounter. So I swapped the IACV off my F22A1 motor which I know was good and I tried taking apart and cleaning the Fast Idle Thermo valve located right under the throttle body. Didn't seem to work, so I ended up disconnecting the TPS and drove around for a while and eventually I decided to try plugging it back in. Now I wasn't having the idle hunt problem anymore, but it still does some funny things. When I drive at low speeds (10-15 MPH) through parking lots in 2nd gear the car starts pulling on it's own when the revs drop below i'd say about 1500 so essentially it's still somewhat idle hunting at these low revs when the car is in gear. Also when I engage the clutch as I'm driving the revs shoot up slightly (about 250 rpms) as I'm switching gears, it's really weird. The CEL does come on a little after starting up when I start driving but I haven't had a chance to get the code read.
Anyways, I decided i'd try putting in another complete throttle body I found in a junkyard. To no avail, same problem, nothings changed. I narrowed it down to a couple things.
I'm thinking it's some sort of vacuum leak. I looked at the vacuum diagram for the H23, I have the EVAP canister from my F22 still in the car. My friend had to bridge one of the vacuum lines because the H23 EVAP had 3 lines attached, my F22 EVAP only has 2.
Now here's the question, does anyone know what the purpose of the EVAP canister is? Is it necessary for me to obtain an H23 EVAP to fix this issue?
I'm writing a whole story here so please bear with me if you haven't fallen asleep already. A few more issues I encounter on a daily basis. When I kick on the A/C the car once again begins idle hunting, not consistently though. The revs will drop and almost die out, but before it dies out it shoots up to about 1700 rpms and that is done pretty consistently when i drive around the streets waiting on lights. The A/C also begins to not be as cold when I get off the highways, when I'm on the highways A/C is fine, still not as cold as it should be but sufficient to run with no issues. It's just when I bring the car to a stop the issues come into play. My analysis of this problem: I'm thinking I have a bad condenser fan, i don't think it's kicking on, but i don't think it's the cause of the idle issue. I did charge the system with a DIY A/C kit and there are no leaks, it holds the charge.
Third and final issue I'm writing about is my car seems to be blowing black smoke upon near redline revs, particularly on close to redline shifts, when I make that shift before redline a puff of black smoke shoots out my exhaust and now the back of my white accord is starting to look like a lemans race car. (Kind of a cool look, but a biotch to clean off) I'm not sure if it's just fuel burning out the tailpipe or is it oil as well burning off as well because that's the other thing is that I have to fill up on oil every 1.5 to 2 weeks, i think there is a leak as i notice my transmission is covered in oil so i'm not really sure if the oil is being burned through the exhaust or is it just leaking out near the distributor cap. I recently pull a whole new head gasket kit in because my JG port and polished head was damaged and had to swap it out for a stock head. So i don't think any of the seals are bad.
Oh yeah I forgot to add, when I pump the brakes at a standstill without a/c on, the car idle hunts a little until I stop pumping. Some kind of related vacuum issue.
For some reason I feel like these issues are all related to each other some way some how but I'm not absolutely sure. Any insight would be grately appreciated.
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