Smog high hc

Author: bkjf

August undefined, 2024

WebFailed CA smog: High HC @ low speed. Hey guys, I need some help, I have a 95 miata with 128,574 miles, and I recently failed smog twice. I am running high on HC on low speed but I pass everything else. I got a fresh head around 5k ago. (including coils, cams, lifters, and so on) After I failed the first test, I did an oil change, air filter ... WebWe know that your NOx is too high, your HC is too high, your CO is a bit high, but that is expected if there is no oxygen in the back half of your cat to burn it. ... The 95 318i failed smog with high HC at low rpt. It failed 2 years ago as well and passed after replacing the oxygen sensor. 15mph - 2024 rpm: CO2 15.8, O2 0.0, HC 159 (MAX is 85 ...

Any help with passing smog? Failing HC PPM at 77 : r/BMWE36

WebIn order for your car to pass the smog check, you need to do a drive cycle to get the OBC ready. This process can be either cost consuming or time consuming. You could either drive a whole 200 miles hopefully the OBC is ready or do as BMW dealership had suggested to drive 30 miles, park the car in idle for 30 minutes, and repeat this process for at least 3-4 … WebDo a HC hang-up check to make sure that HC is less than 20ppm. Insert the analyser probe into the exhaust. Raise the engine speed to between 2,500rpm and 3,000rpm and hold it … pomona amtrak train station

How can hydrocarbon emissions be reduced? - Studybuff

Web4 Sep 2015 · HC (max) 55 // 39 HC (mea) 135 // 68 indicates a possible lean miss CO (max) 0.50 // 0.48 CO (mea) 0.36 // 0.16 NO (max) 437 // 724 NO (mea) 1513 // 1061 would also fit the profile of a lean miss/high combustion temps I know that it's strange to have both high NO & HC with elevated CO as well! Web24 Jun 2024 · High HC and high NO. And while the failure points to a bad EGR system, I am absolutely certain the EGR system is functioning as it should. ... Causes of High NOx Emissions. NOx (or nitrogen oxide) is a chemical in automotive exhaust that gets created when the temperature inside a vehicle engine's combustion chamber exceeds 2,500 … Web3 Aug 2024 · It had high HC at both idle and 2500 (idle was worse). I don't recall the exact numbers, but they weren't really bad. It has new plugs and wires and is running well, … pomona apartments baltimore

honda - Emissions - High CO reading only - Motor Vehicle …

Smog high hc

Emissions level HC (PPM) too high in truck. How to fix?

Web8 rows · One of the most effective ways to resolve emissions issues is by sampling the … Web17 Nov 2005 · Running rich (O2 sensor, MAP sensor) -> high HC, high CO Bad cats -> potentially high HC, CO, or NO, not necessarily at the same time ... My 94 with the hi-boost CTSC and Comptech I/H/E failed smog the previous week for having HC levels too high at 1500 rpm. Everything else was okay though.

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Web27 Aug 2005 · High HC + High CO would indicate a rich mixture, high HC w/ normal or low CO would indicate a lean mixture. High 02 would confirm this. You could have a plug that's not quite firing at low RPM, or something to that effect that's causing it to misfire at idle, maybe not enough to detect but enough for it to not pass smog. Web31 Dec 2008 · Re: Car failed smog, high hydrocarbons (HC) and NO. Offhand, there's really no way to confirm a failed catcon but a plugged one can be tested. Most worn out catcons are from years of use and is the last replacement after replacing everything else. A plugged/choked catcon simply won't allow the engine to rev giving the driver symptoms of …

Web13 May 2014 · HC is unburned fuel. CO is partially-burned fuel. NOx is "oxides of nitrogen (assorted)", and results from elevated combustion temperatures, dissociating the molecular nitrogen in the air and oxidising it (which has sod-all to do with fuel. Atmospheric air is roughly 75% molecular nitrogen.) Web24 May 2024 · HC at 61ppm passes MOT but way too high for healthy emissions. We would not entertain warranty returns of cats where emissions report shows HC > 60ppm. At last MOT on my infrequently used 1997 MK1 1.6, HC was highest its ever been at 21ppm, 1991 Eunos, more frequently used, summit like 8ppm CO percentage is way too high.

Web13 Apr 2024 · Came back with high HC idle max is 100 meas 139, 2500 rpm max is 130, meas 167. recently put in new plugs, mobil 1 and new filters {air and oil}. The CO idle max. is 1.0 , meas .06. the 2500rpm co max 1.0 meas .29. only fail was HC. Went home and the under chassis {rear cat} did not show significant heat changes {only 20-30 degress or so … Web8 Feb 2010 · I have a 95 civic coupe with a 1.6L d16z6. I am failing Texas emissions test with a high HC level and high Nox level. Passing HC level at high speed is 147 and low speed is 152. First test high speed result 284, low speed 295. Second test high speed 279, low speed 306. Passing Nox level at high speed is 1072 and low speed is 1186.

WebNOx emissions rise and fall in a reverse pattern to HC emissions. As the mixture becomes leaner more of the HC's are burnt, but at high temperatures and pressures (under load) in the combustion chamber there will be excess O2 molecules which combine with the nitrogen to create NOx. ... High HC, low CO, and high O2 at same time indicates a ...

Web12 Jul 2011 · Incomplete combustion leads to high HC and CO. The low hanging fruit would be to check/change the sparkplugs and wires. Consistently high HC will eventually destroy your catalytic converter as well. Other things to check: ECTS (engine temperature sensor) leaky fuel injectors. improperly high fuel pressure. shannon sharpe on skipWeb20 Feb 2010 · After $200, and a new front oxygen sensor. it failed SMOG test AGAIN. The results are the same. High hydrocarbons. (I should have done it myself but that's another story.) HC 100 PPM at 15 mph, 90 PPM at 25 mph maximum allowed is 58 and 42 respectively. CO 0.65% 0.62% maximum 0.73 and 0.88. pomona apartments for rent cheapWeb16 Jun 2010 · 5.STP Oil treatment. At your mileage, your likely getting some contribution to the HC number from burning oil. Put a can of Seafoam in the gas tank. Get the deep creep and clean the throttle body as well. An old toothbrush and a few rags will get the job done. pomona assessor\u0027s officeWeb17 Dec 2005 · The car has failed it's MOT on just the CO (carbon monoxide) output. Everything else was OK. The limit set by the MOT Tester was 0.3%, the actual emissions on 2 Fast Idle and 1 Normal Idle test ... shannon sharpe on womenWeb16 Jan 2012 · Re: CA SMOG, HIGH NOx. Earlier today i checked the fuel pressure just for kicks, its about 34psi at primed cold state/engine off and varies from 32-38psi revving the engine. The Seafoming engine treatment I mentioned was 1/2 a can down the Brake Booster Vac tube and the other 1/2 down the Fuel Tank which was indeed before the O2 … pomona bathroom remodelling yelpWeb4 May 2012 · well running 408 HC's at idle sounds like a car having a cold engine, my 91 mr2t was running with about 380ish HC's and i also failed smog, i installed my ebay … shannon sharpe pro football referenceWeb11 Jul 2024 · Here are the results from the test (units are grams per mile): Category / Reading / Limit. HC / 3.0037 / 1.2000. CO / 12.497 / 15.0000. NOx / 3.037 / 3.0000. So as you can see, it failed the HC quite badly while just barely failing the NOx. I think a high HC means that it's running rich but correct me if I'm wrong. shannon sharpe reddit