there is no debate, all this is law now, the EPA here regulates this, end to end. (when the cat is dead, as it is cold, smog happens and they do care and do regulate this greatly ! (grams of HC, started!cold or hot) and more each year , heck in EU they now regulate CO2. (means tiny engines)_! not just HC,
no car stated, errrrrrrr ok you have posts here, 1998 G16b non usa car, no country stated yet.
but im too lazy to read all your 14 post to discover car, , do a signature, in you account, so we dont have search deep to find out what you drive.
in the usa this is law.(and in EU)
the engine does not know if car is in Alaska or in KeyWest.not really. (beyond 2 sensors.IAT/ECT)
so it heats the the whole intake, system and head the isc but the isc is electric and is not effected by heat,. but the ISC on the 8v heats the TB on the 16v it heats up the plenum box. (nothing trival here at all this is by design and laws of nations)
the iAC valve is a thermal air valve if not heated it goes dead and leaks air and engine screams a 3000 rpm at idle, that be bad.
the ECU is tuned to burn the fuel based on water temp and air temp (IAC) to the fuel vapor pressure specs. (a fuel spec that is also regulate by law.)
the fuel will not vaporize cold if that happens, the engine makes smog, huge smog (HC), so every effort is made to heat those parts fast.
IF the didnt, they be like VW is now. today. DOA, no imports to USA , (still playing out) not to mention the MPG lies told by VW, (huge whoppers)
the heated air allows the fuel to vaporize, easy,
the engine does not burn liquid fuel, if it is liquid it will pool up in the intake plenum like all 8v love to do and are now illegal here for this 1 fact.
Calif banned it first.
with G16b are port injection running dry runners., direct injection systems are even better for this reasons.
The injector needs to vaporize the fuel not stay drops of fuel, see? drops bad, vapor best.
on cold start the IAC is open below 150F, (colder more its by Design) that makes the engine race cold, and is by law here, to burn the fuel best, cold.
the cat is dead, cold, as is the 02, so HC can be nasty with 1billion cars puking HC on earth, huge....
so it makes smog cold, unless engine is races. it's hard coded into the ecu and the IAC sets all idles speeds below 150f,.
Rule 1 of all ECU , never lie to the ECU, it will calculate wrong, every time,.... the ecu runs tables , for many things, so of you lie to it ,it uses the wrong tables.
you cant change that, unless , taking the IAC apart seems fun. once apart what would you do next attack the wax pellet and shim it?
nah...
or as you say block it with a solid gasket.
then the engine floods starting it. The block here is a huge lie to the ECU, the ecu then over injects for this lie. (making your too rich more rich) a fact.
Id bet yours system has problems. but I really dont know why you know its rich at cold idle, at all.
after all the ECU knows IAC open and how much! (not now if blocked) and injects wrong, dead wrong. and floods. making what.
huge smog
and washing the rings with raw liquid fuel flushing off that clean oil, and huge start up wear, why not just leave it all working. or fix real problems.
we have these engines going 300k to 500,000 miles , easy, (w/clean oil)
why make it worse?> it's a great piece of engineering. (hacked)
it's not suffering, I PROMISE.!
that 2k ECT jump resistor lies to the ecu, causing it to go leaner, and wrong, the ECU has fuel evap tables that use ECT to use the correct vapor pressure, settings.
cold fuel does not vaporize. so going lean is not good,
there are many reasons for too rich cold.
1: low compression
2: bad fuel.
3: IAC bad, fails to close at 150f, or slow to get there. bad thermostat wrong therostat, or water line to iac blocked.
4: bad ECT
5; bad iat.
6:FPR bad,
7: fuel pressure not at spec,
8: its not the 02 its off line cold..
9: TV stuck open , tv cable not see with 10mm ply or some have 3 cables same, a/t, throttle and cruise
10: some bad guy attached the tv stop screw,(horror) he turned it and did you in.
11: ISC sticking open.
12: idle switch bad.
13: TPS calibrated wrong, see 12.
14 : injectors leak. do a leak down and a balance test yet on all 4?
how do you know it's too rich, sniff sniff? the scan tool wont tell you cold. how?
the cold start rpm is 100% a factor of engine block water temperatures, water. and the IAC opening rate
and not stated by you. what temp was the air outside and water temp, when experienced this rich event?
and how was the event detected?????
no lie IAC go bad.
and stick
or go non linear. just like a thermostat does and for exactly the same reasons, it's same technology
or sticky random.
or stuck open or stuck closed
and are hard to test.
so does FPR this old, many are, we see now.
no car stated, errrrrrrr ok you have posts here, 1998 G16b non usa car, no country stated yet.
but im too lazy to read all your 14 post to discover car, , do a signature, in you account, so we dont have search deep to find out what you drive.
in the usa this is law.(and in EU)
the engine does not know if car is in Alaska or in KeyWest.not really. (beyond 2 sensors.IAT/ECT)
so it heats the the whole intake, system and head the isc but the isc is electric and is not effected by heat,. but the ISC on the 8v heats the TB on the 16v it heats up the plenum box. (nothing trival here at all this is by design and laws of nations)
the iAC valve is a thermal air valve if not heated it goes dead and leaks air and engine screams a 3000 rpm at idle, that be bad.
the ECU is tuned to burn the fuel based on water temp and air temp (IAC) to the fuel vapor pressure specs. (a fuel spec that is also regulate by law.)
the fuel will not vaporize cold if that happens, the engine makes smog, huge smog (HC), so every effort is made to heat those parts fast.
IF the didnt, they be like VW is now. today. DOA, no imports to USA , (still playing out) not to mention the MPG lies told by VW, (huge whoppers)
the heated air allows the fuel to vaporize, easy,
the engine does not burn liquid fuel, if it is liquid it will pool up in the intake plenum like all 8v love to do and are now illegal here for this 1 fact.
Calif banned it first.
with G16b are port injection running dry runners., direct injection systems are even better for this reasons.
The injector needs to vaporize the fuel not stay drops of fuel, see? drops bad, vapor best.
on cold start the IAC is open below 150F, (colder more its by Design) that makes the engine race cold, and is by law here, to burn the fuel best, cold.
the cat is dead, cold, as is the 02, so HC can be nasty with 1billion cars puking HC on earth, huge....
so it makes smog cold, unless engine is races. it's hard coded into the ecu and the IAC sets all idles speeds below 150f,.
Rule 1 of all ECU , never lie to the ECU, it will calculate wrong, every time,.... the ecu runs tables , for many things, so of you lie to it ,it uses the wrong tables.
you cant change that, unless , taking the IAC apart seems fun. once apart what would you do next attack the wax pellet and shim it?
nah...
or as you say block it with a solid gasket.
then the engine floods starting it. The block here is a huge lie to the ECU, the ecu then over injects for this lie. (making your too rich more rich) a fact.
Id bet yours system has problems. but I really dont know why you know its rich at cold idle, at all.
after all the ECU knows IAC open and how much! (not now if blocked) and injects wrong, dead wrong. and floods. making what.
huge smog
and washing the rings with raw liquid fuel flushing off that clean oil, and huge start up wear, why not just leave it all working. or fix real problems.
we have these engines going 300k to 500,000 miles , easy, (w/clean oil)
why make it worse?> it's a great piece of engineering. (hacked)
it's not suffering, I PROMISE.!
that 2k ECT jump resistor lies to the ecu, causing it to go leaner, and wrong, the ECU has fuel evap tables that use ECT to use the correct vapor pressure, settings.
cold fuel does not vaporize. so going lean is not good,
there are many reasons for too rich cold.
1: low compression
2: bad fuel.
3: IAC bad, fails to close at 150f, or slow to get there. bad thermostat wrong therostat, or water line to iac blocked.
4: bad ECT
5; bad iat.
6:FPR bad,
7: fuel pressure not at spec,
8: its not the 02 its off line cold..
9: TV stuck open , tv cable not see with 10mm ply or some have 3 cables same, a/t, throttle and cruise
10: some bad guy attached the tv stop screw,(horror) he turned it and did you in.
11: ISC sticking open.
12: idle switch bad.
13: TPS calibrated wrong, see 12.
14 : injectors leak. do a leak down and a balance test yet on all 4?
how do you know it's too rich, sniff sniff? the scan tool wont tell you cold. how?
the cold start rpm is 100% a factor of engine block water temperatures, water. and the IAC opening rate
and not stated by you. what temp was the air outside and water temp, when experienced this rich event?
and how was the event detected?????
no lie IAC go bad.
and stick
or go non linear. just like a thermostat does and for exactly the same reasons, it's same technology
or sticky random.
or stuck open or stuck closed
and are hard to test.
so does FPR this old, many are, we see now.
http://www.fixkick.com