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Smog high hc

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. WebAgain, older cars are allowed more freedom although I find that most any car should be able to run under 400 PPM. My 1923 Haynes runs at 300 to 350 ppm HC and 4.0% CO. High HC readings are a little more challenging to trouble shoot because there are so many possible causes including a mixture or worse, a cylinder balance problem. Carbon Dioxide:

EA81T Failed Smog: High HC - Ultimate Subaru Message Board

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 … WebIn this video I go over how you can diagnose excessive amounts of Hydro Carbons (HC), Carbon Monoxide (CO) and Nitrogen Oxide (Nox) in your exhaust. I go over how a rich or lean condition can... is hdro a buy https://roosterscc.com

Vehicle Failed Emissions, High HC at Idle, so this is how I fixed it ...

WebRunning into high HC in my emissions. Failing at 77 when max is 54. I do usually have a CEL for P0445 which is a Large Evap Leak. I tested once just going in while the car was hot and CEL was off and it failed at a 74, second time (free retest) I used cataclean and octane booster but failed with a HC of 77 (this was recommended by the smog guy). 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 … http://type2.com/library/exhaust/comix.htm sabah hardware association

too much HC on SMOG testing in CA. Toyota RAV4 Forums

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

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Smog high hc

What Causes High Hydrocarbon (HC)? - SmogTips.com

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 … WebWhat are these emissions readings trying to tell us? At first glance, the high hydrocarbon (HC) reading would seem to indicate an abundance of available fuel, yet the very high oxygen (O2) reading might lead us to wonder if we're looking at a lean misfire condition. The relatively low carbon monoxide (CO) figure seems to rule out a rich mixture ...

Smog high hc

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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 ... Web7 Dec 2004 · It forms when nitrogen (78 percent of the air we breathe) combines with oxygen (21 percent of the atmosphere), which can happen only at very high combustion …

Web14 Jul 2011 · High CO & HC - Cat converters, smog pump, and smog pump controls. How to pass emissions testing: 1.) Make sure all the emissions gear the car was made with is present and connected up properly. That includes a working smog pump and cats. The smog tech will do a visual check to make sure that all the original equipment is present and … Web5 Nov 2024 · The criteria pollutant emissions generated from fuel combustion by internal combustion engines (ICE) include nitrogen oxides (NO and NO 2, together called NO x), …

Web15 Jan 2016 · Once welded. NOX was 100 and zero (15,25) 3rd Jeep. 4.0, 5spd, customer brings jeep in, jeep fails NOX 1100 at 15mph, 1970 25mph, HC and CO all relatively low HC 30, CO .07. Customer says he put an 02 in 4 months ago to get better gas mileage, has since gotten WORSE gas mileage and has to run 91 to stop pinging.

Web29 Aug 2011 · The HC and CO are high at idle. Once the rpms starting going up, the smog numbers go down. As soon as the smog tech lets off the throttle and the motor gets to idle speed, the HC start shooting up. The numbers are fine anytime besides right at idle. I'm at a lose, any help would be appreciated. I've included a pic of my smog sheet. sabah golf courseWeb11 Jun 2014 · Among these pollutant emission, CO and HC are emitted because of incomplete combustion and unburned fuel while NO x emissions are caused because of high combustion temperatures above 1,600 °C. As for PM emissions, the reasons of PM emissions are agglomeration of very small particles of partly burned fuel, partly burned … is hdts a good qualityWeb4 Nov 2010 · Hi HCs and CO would indicate a overly rich mixture exiting your tailpipe. Things to check/replace -Spark plugs -Dizzy cap -Dizzy rotor -Ignition timing -Engine air filter -O2 sensor -Make sure PCV/breather hose is not obstructed. (responsible for 20% of air volume necessary to maintain healthy stoichometry at idle) is hdsn a buy