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Saturn runs lean - 2002 Saturn L-Series

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I have a 1997 saturn sw2 that stopped runnuing changed fuel pump wont idle error code #4 cylinder is miss fireing changed ignition module car starts runs ruff changed spark plugs & wire set


You need to make sure the cylinder is getting fuel and that it doesn't have a vacuum leak at the intake that is leaning it out and causing a misfire, if that checks ok then determine if the #4 cylinder has acceptable compression as compared to the other three, all cylinders should been within 5% of the cylinder with the highest pressure on test.

Mar 03, 2017 | Saturn SW2 Cars & Trucks

1 Answer

95 saturn strn with automatic transmission running really rough and stalling when I stop. what should I do I


Hi Duane:
Think I'll "shoot from the hip" on this one.
Just for the fun of it, check the pcv valve and the related vacuum lines.
The auto choke when cold means running rich and the fast idle is OK. When it warms up it wants to run lean and it sounds like it might be too lean. PCV or vacuum leak may be the problem.
It also would be a reasonable idea to to a carb flush and to add a conditioner like SEA FOAM to help clean things up if the fulel gelled while it was parked.
Hope this helps.

Oct 05, 2015 | Saturn Cars & Trucks

1 Answer

Saturn vue 2.2 when running in gear at stop it acts like its getting to much gas at idle running very lean


Too much gas is rich...not lean. What does it do at idle? Blow black smoke and load up or shake and almost want to stall

May 10, 2015 | Saturn Cars & Trucks

2 Answers

OBD2 METER READS ENGINE TOO LEAN


Lean running condition A lean running condition means that the air/fuel mixture is unbalanced, and that the engine is getting either too much air, not enough fuel, or a combination of both. Optimally, this ratio should be around 14.7 parts air to 1 part fuel by mass, at low or cruising loads. This ratio is known as stoichiometric for gasoline. Ideally, at WOT, you should aim between 11.5:1 (Rich best torque at WOT) and 13.3:1 (Lean best torque at WOT).
Running lean, like having your spark timing too advanced, creates much more heat during the combustion process. This can lead to piston seizure, a hole in the piston, melted spark plug electrode or other complications due to overheating. You will not be producing peak power, and your exhaust will also emit more oxides of nitrogen, arguably one of the worst byproducts of gasoline combustion for our environment.
Common causes of a lean running condition are an improperly tuned carburetor, clogged fuel line, clogged fuel filter, or a vacuum leak.
Preforming a plug chop is a good way to find out if your engine is running too lean, as you will see a powdery white residue on your spark plug in the presence of a lean condition.
On the other end of the spectrum, richer ratios will also cause lost power, however this will most likely be accompanied by black smoke (around the 9:1 fuel/air ratio area), and fouled spark plugs.

May 30, 2010 | 2002 Saturn VUE

1 Answer

Ok i got a 2002 saturn vue..code was saying bank 1 bank 2 running lean..the vue runs perfect ,sometime at park it would idle hi.anyways i have replaced the mass air flow unit..turn off light,comes back on...


I had exactly the same problem .Mine was corrected with replacing the O2 sensors .The sensors cost less than $30 each but cost about 20 mins labor per sensor .So if you got an honest mechanic the total cost will be around $130 .

Jan 19, 2010 | 2002 Saturn VUE

2 Answers

Engine light


most likely this is the O2 sensor for that cylinder bank is defective.

Jun 24, 2009 | 1993 Saturn SL2

1 Answer

Car dies when you put it in gear


I would check your MAF and the IAC.  Try cleaning your Mass Air Flow sensor which is in the tube that takes air from the air filter to the throttle body (you will see that it is plugged in).  Clean it with some cleaner that says it's safe for a MAF.  If it's not that and what I am leaning towards would be your IAC valve.  The idle air control valve is located on your throttle body and is normally attached with two screws.  I would start with the MAF just because it's cheaper but I'm leaning towards the IAC.  Let me know if you have any other questions.  Thanks for an honest rating and for using FixYa!

May 24, 2009 | 1997 Saturn SC

1 Answer

Service engine soon; code to engine running too lean...


Yes, it makes sence. I have a 1998 Saturn SL too, and I had to replace the fuel pressure regulater on it. I also had the light go on every once in a while. I asked a guy at saturn, and he said that there was a sencer on the engine that is goes bad after awile. The problem was that it was made of plastic and it would crack, but now they make them out of metal. I don't remember what the sencer is called, but ask a guy at the saturn parts window, and ask him if he knows what the secser is called, he should know.

Feb 26, 2009 | 1998 Saturn SL

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