werteg

Hey master techs. I can't adjust my idle any more on my civic and need some ideas.
My initial rpm reading is 320rpm and it needs to be 420rpm plus or minus 50rpm while the EACV "electronic air control valve" is disconnected.
I can't adjust my idle any more on my civic and need some ideas. I changed my failed solenoid Electronic Idle Air Controle Valve "EACV" after it was humming. The only parts I have not replaced on the engine and power train systems are the Fast Idle Air Valve "FAV" witch is located on the bottom of the throttle body and havn't replaced the distributor body, egniter, coil, and spark plug wires. Everything besides the piston, piston rings, oil pump, bearings, and crankshaft are new.

I need to adjust my timing only after I have the base idle set. I currently have the timing set by holding the throttle to the proper idle. And basicly I need more rpm and my adjustment screw is all the way unscrewed. "I did unplug the EACV and reset ECU after attempting to set idle and finding problem."

The reson I have done so much to this car is when I bought it it had a Honda CX 8 valve head instead of the 16 valve head it was assembled with. I had a overheat somehow on the freeway and after pouring cold water on the engine "i was young and cool at the time hehe" I heared a crack sound near the water pump and water was getting into the oil after that. Five years later I started working on my car and found it had a headgasket failure and the block was good and normal. I reinstalled the head but didn't machine the surface and after one over heat climbing a mountain it failed another head gasket. I purchased a 16 valve head on ebay all machined and pretty and well I think it sounds like new but possible more damage in areas I am unfamiliar with like the idle air control valves that had gone through running on steem since the cooling system didn't hold pressure after a head gasket failure. Basicly alot of stuff could and did get damaged. I already replaced a contaminated o2 sensor and changed the oil twice.

Below is my parts.
1993 Honda Civic DX 3Door
D15B7 engine with PM3-6 head "valve timing is correct and set"
New factory gaskets and seals
Machined new head
New factory distributor cap and rotor
40k mile ignition coil
115k mile old distributor
115k mile old rest of parts "orginal parts that came with vehicle."
New factory air filter, oil filter, spark plugs, injectors, fuel filter, charcoal canister.
New mobile one synthetic engine oil.
New hoses and cooling system flush and kept toped off.
Good fuel changed twice a month.

Tommarow morning I will try and swap out my 115k mile old Fast Idle Air Valve with a 40k mile old one that I have as a spare.
So any ideas master techs?

Here is my proceedure I will do first thing in the morning.
Just to let you guys know, this air control valve and the camshaft are my favorite devices.

werteg

Hey guys, how do I remove my nOOb avatar? Let's make this country great again. Ill mention Great Britan as a start. A Great America would be apreciated. See im not so newbie hehe.

werteg

I worked on my car today and found some things.
I R&R'ed the fast idle valve and advanced my timing. I got my idle solved but still have low vacume and retarded timing. I can't adjust the ignition timing any more. I was told that it is a valve problem because of the vacume results. I did notice a valve spring looked week witch came assembled on my rebuilt head I got from ebay. I think they mis-matched a spring. Any ideas if I should simple replace that spring and adjust valve gapping when engine is hot and if that would fix the vacume problem? All hoses are new, new pcv valve, and new gaskets with seals.

canadaek

guess the o2 sensor didn't fix it . maybe your ebay head has the wrong cam in it.

ken9

Possiblitly something wrong with the d15 head since you already adjust all the idle, iacv, and change gasket..just opinion..

werteg

I think your right and so far I am going to replace the distributor and I noticed when I installed the head that one exhaust valve spring was week or in other words was the wrong spring for that valve. It was easy to press the valve open with just a thumb. I ordered one spring and will replace it. I wonder if there is a strong spring on the intake hehe. Other then that error, the head is like new. Anyone heared of a week exhaust valve spring causing a vacume reading to pulse? My vacume is reading that it is late ignition timing.

werteg

Can a vacume problem caused by a week cylinder caused by wrong valve springs cause ecu to say that the map sensor shows low load and cause retard spark and so I can't set my ignition timing? I know I have a spring that is wrong and the cylinder acts like it's misfiring since it is weeker then other 3. The vacume reading is pulsing and it is showing "Ignition Timing Late". So I think the pulsing of the gauge tells that there is a valve problem. And my main problem is that I can't set ignition timing. The head is a re-built and machined one from ebay. Sounds strong other then that one wrong exhaust valve spring. So what do you master techs think? Should I buy a new distributor? Could I set ignition timing with a week cylinder even though I can set idle? I distributor is at it's limit and I need more advancment.

canadaek

fix the springs first.

bryanja7

Hey all im new to site so cant start a thread but i was wondering if anyone can help me out. I just did valve adjustment on my 00 civic ex set intake to .008 and ex to .010 reset ecm ( unplugged battery while doing adjustments) and for the first 10 mins or so car had a really rough idle and stalled couple times while stopping . now it is idling normal again a lil low but it has always been that way.. just wanted to know if that is from the ecu relearning or should i re check my adjustments or make them tighter i set them to the middle of the spec settings . any help is appreciated and again sorry for hijacking post but i cant start threads yet