Question about 1983 Ford Econoline

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Wont pass smog. the gas is to rich. what am I suppose to do about that?

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Hesitates a couple seconds when applying gas the takes off.

Posted on Apr 22, 2010

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1991 Toyota Camry running rich after cleaning the throttle body and replaced the throttle positioning sensor. Checked for vacumm leaks but cant find any


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... running rich I have a 1991 Camry that is running rich. I just replaced the O2 sensor and a new cat, oil change, new spark plugs. The car wont pass smog. it is ...

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Jan 11, 2016 | Toyota Cars & Trucks

1 Answer

WONT PASS SMOG


I have 1995 Toyota 4runner v6 automatic 4 wheel drive will not pass smog testit is the CEO percentage is at 2.77 and it's supposed to be at 1.00 what can I do to fix that problem I have to get up plugs wires cap and rotor change the oil filter Oil air filter timing belt just the airflow I also even put it in time what can I do to solve this problem

Jan 05, 2014 | 1987 Ford F 150

1 Answer

Won't pass smog when it should...


Just because the car seems to run well, does not mean the emissions are within spec. For example, you could be running a little rich and the car will start and run great, but the exhaust is not within code.
What you can do is take it to a "smog shop", that is a repair shop with the proper equipment to diagnose the problem. If the testing is simply the reading of the on board computer codes, then most any place can read those, but you need an experinced mech to know what to do about it. May need an exhaust gas analyzer to physically sample and analyse the gasses. For the actual test, as long as the computer says all is fine, usually, you're good to go.
If the computer looses power any saved run data will be lost and must be re-accumulated to pass the smog test. A few hours to a day is usually enough run time to accumulate enough data.

Dec 04, 2013 | 1999 Saturn SL

1 Answer

Not passing smog, no code or engine light


Its going to be tough to find the problem without access to a 4 gas machine. Especially if there are no trouble codes in the computer.
If the fuel mixture is rich it should set a code for one or both O2 sensors. Same thing if the EGR is not working, etc.
One thing that could cause problems is the thermostat not getting the engine up to normal temp.

Jan 29, 2013 | 2000 Toyota Tacoma PreRunner

1 Answer

Monte carlo running to rich


try an new tune up, cap rotor plugs wires, do a fuel filter, and a carbon clean, then check the timing correct it if necessary and the adjust the carb

Jan 15, 2013 | 1983 Chevrolet Monte Carlo

1 Answer

Won't pass smog, Rich idle.


First, is the check engine light on ?
You should have a code for the O2 sensor showing the exhaust gas is rich.
Could be a faulty injector, fuel pressure regulator, or O2 sensor.
Even a faulty thermostat would do it.

Sep 15, 2012 | 1991 Oldsmobile Cutlass Cruiser

1 Answer

I have a 96 Sentra which has been sitting for two years. it has 240,000 miles on it. It runs smooth but will not pass California Smog. What parts can I check or replace to improve the chances of passing...


CHANGE AIR FILTER.CLEAN FUEL INJECTORS.CHANGE SPARK PLUGS AND WIRES.BECAUSE MISFIRE CAUSE RICH CARBON MONOXIDE OUT PUT.MAKE SURE CHECK ENGINE LIGHT NOT ON IF SO CAR WONT PASS INSPECTION.CODE SCAN CAR SEE WHAT TROUBLE YOU ARE GETTING.

Feb 27, 2011 | 1996 Nissan Sentra

1 Answer

1991 Camry running rich


check for vacuum leaks especially around the intake manifold gasket. Although the engine appears to be running rich, it could also be misfiring due to being too lean in one cylinder. When the cylinder doesn't fire the charge, it goes into the exhaust completely unburned and looks like a rich running condition due to the unburned fuel. If it is a vacuum leak causing the problem, the engine will run fine at road speeds but misfire at idle and not pass smog.

Jan 30, 2009 | 1991 Toyota Camry

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