Question about 1986 Porsche 944

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How do i set mass air flow valve so it does run too lean to pass ca smog on 86 944 porsche

Runs like new wont pass California smog

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Posted on Apr 08, 2015

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1986 porsche 944 dont pass ca smog running too lean


Probably Nox too high. Can also be engine too hot. Last time cooling system serviced? Also can be carbon in the combustion chamber ignites fuel too soon. Fuel delivery system and all sensors may be a problem. Bad or corroded connections can contribute to bad behavior of the ECU.

Apr 08, 2015 | 1986 Porsche 944

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What can i do to remedy an emissions problem ive been struggling with for over 3 months


Hi Eric-
The air mass sensor may be either the wrong part or a faulty sensor. I would recommend trying another sensor. In addition please inspect the connector and make sure it is ok.

Aug 30, 2014 | 2008 BMW 328i

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Replaced emissionpvc valves ,evaporator canister ,evaporator solenoid , throttle sensor leak detector for bad flow, still didn't erase p0114,so changed throttle sensor and map sensor now have p0113 h


  • Defective Intake Air Temperature Sensor
  • Dirty air filter
  • Defective Mass Air Flow Sensor
  • Faulty or corroded Intake Air Temperature Sensor wiring or connections

Mar 31, 2014 | 2004 Dodge Durango

1 Answer

Can you run headers on a 1996 z28 camaro and still comply with the Emission control.


It depends on what state your in, but there are lots of companys that make headers that are 50 state legal. If you are in CA just make sure it says that it specifically states CA legal. CA is the toughest state on smog so some headers are made just for CA smog legal. Or just pick your favorite and pay someone 100 bucks to pass you. Here is an example. As long as it doesnt eliminate your cats. You can also run like High Flow Magnaflow Cats. Those will pass smog in all 50 states.
http://store.newlevelmotorsports.com/papehe19chca14.html

Sep 01, 2011 | 1996 Chevrolet Camaro

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

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1999 gmc yukon obd11 codes po101 po171 po174 po429 what could be the causes


ok heres problem 101 is mass air flow sensor 171 running too rich 174 running too lean can find 429 but it the same lines i believe take out your mass air flow sensor and clean it check it connection if comes back on replace the mass air flow sensor

Sep 24, 2010 | GMC Yukon Cars & Trucks

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Mass Air Flow Sensor, oxygen sensor and coil plugs


look for vacuum leaks the last 4 codes are lean codes
primarily lookm at the pcv hose noturious for collapsing

Sep 16, 2008 | 2000 Ford Expedition

1 Answer

SMOG TEST


If it was originally intended for Texas, it's probably been made as a 49-state-compliant vehicle (CA has stricter emissions). To pass in CA, you may need some new parts for the truck in order to get it to pass. Or you may find that the best course of action is to sell the truck and buy a CA-emissions car.

The CA DMV may well have information available on how to get non-CA-compliant cars to pass the CA emissions testing.

Aug 25, 2008 | 1997 Nissan Pickup

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