I have put a new map sensor,oxygen sensor,new fuel regulator on my 1996 saturn sl 1 1.9 engine and i am still getting the code po172 and service engine is still on I don't know what else to do and its making me mad.Sometimes its steady service engine and when i stop at the stop light or stop sign the service engine light starts blinking can anyone tell me what is the problem or do i need to replace the engine,black particles be coming out of the tail pipe i am losing oil i have no oil leaks.I even put in new fuel injectors in the car it still sputtering and the Service Engine Soon is still on.What else could be the problem.Do I need to swap engine soon?When I put gas in the car the Service Engine Light comes on I use regular unleaded.
SOURCE: about super unleaded and unleaded fuel
Hi,some manufacturers recomend either super or regular unleded ,the diference is the octane rating ,this will not afect your motor but you allways should stay with the factory recomendations......
SOURCE: service engine soon light on 2003 Saturn Vue
Here is the definition of the code in GM manual:
P0128 - Coolant Thermostat Below Thermostat Regulating Temperature, this indicates the engine is running cold, u need a thermostat
SOURCE: Chevy ''Service Engine Soon'' light keeps coming on
take about 20 minutes if you have to tools handy. You have 4 02 sensors so be sure to have the tech tell you which one.
SOURCE: service engine light comes on the code is 32 have any idea
Check for
vacuum leaks on intake manifold,
the air tube between the air filter.
intake manifold vacuum hose.
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clean throttle plate with Berryman carburator cleaner
SEE sample picture HERE
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Also remove carbon built up behind the EGR valve and the EGR passage tube.
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Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.
More un-metered air (leaks) will lean out the fuel mixture.
Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.
At idle,just spray and listen for the RPM surge.
The in-rush of carb clearer will increase the RPM on the motor.
Record the problem spot(s) and address it later.
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EGR carbon built up require 2+ hours to clean from start to finish.
You will need a new EGR base gasket before your start.
Locate and remove the EGR valve after the vehicle is cool down.
Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.
Remove the EGR valve.
Inspect the location of the carbon built-up inside the valve and the EGR passage tube.
SOAK these areas with WD-40 spary.
You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.
RE-SOAK the carbon and let it sit for over-night will also help.
One the last round,pass a shop vacuum of the EGR valve and the passage pipe.
Install the new EGR gasket and connectors.
Allow the vehicle to warm up outdoor to burn up any remaining WD-40.
Take it for a test drive.
Please rate my answer if it's useful to you.
Cheers,
Mustgo
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