Question about 1997 Buick LeSabre

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Had oil changed after check engine light came on and is misfiring. Oil changing station said they put to much oil in. Could they have done more damage?

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Yes Sounds like oil is getting on your plugs.

Posted on Jul 21, 2009

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What am I doing wrong? Cylinder 2 misfire will not go away. Tried everything. Even stumped a mechanic.


have a compression test done and look for a moving valve seat insert
it gives the knock, misfire
as it is no 2 cylinder it is mechanical because you have moved the injectors and coils , plugs and leads and it stays at no 2 cylinder
If you want clean engine oil then change the synthetic oil out and put in diesel oil 20w40
It will not harm the engine as it is the same as petrol oil but with more additives than petrol oil
it is cheaper and has heavy detergent properties that keeps the engine internals clean
from the gunk in the sump ,it is clear that changing engine oil on a regular basis is something you don't do but if you want a reliable long lasting engine , it is must do number 1

Oct 22, 2015 | Cars & Trucks

1 Answer

I have 03 envoy so 6 cylinder change sparks plugs change oil p0300 GMC code check engine light blinking misfiring


engine misfiring can be either plugs ( changed) HT leads ( broken internally from pulling them off the plugs to do the change)and injector faults. Moving wires around to get to plugs.. If you have individual coil packs for the plugs then check that they have refitted correctly or the wires and connections for them are properly connected .. If all is ok then have a compression test done as low compression shows up as one of the reasons for random / multiple misfires (po300)

Aug 26, 2014 | Cars & Trucks

1 Answer

Spark plugs covered oil


oil on the plugs is an indication of worn engine and ting problems
you can use a a hotter plug to burn off the oil or use multi point plugs to that they don.t foul from the oil

May 03, 2017 | Toyota Cars & Trucks

1 Answer

I have a 2004 Freestar and had the oil changed and it immediately started misfiring and knocking, come to find out they put the wrong oil in and have been doing so for 4 years! They are denying that is the...


The type of oil in the engine will not affect the check engine light. The engine light only comes on when something in the engine management system is out of specifications. Any sensor reading out of specification, e.g. oxygen sensor, mass air flow sensor, throttle position sensor etc., will trip the engine light. The only way I can think that the oil changers could be responsible is if they moved or damaged some wiring or a sensor etc. while doing the oil change.

Jul 01, 2011 | 2006 Ford Freestar

2 Answers

When i accelerate car makes a popping sound, hesitates and then takes off


99% of the time this means you have a ignition misfire, and almost always was is a plug cable. Since you have COP's (coil on plugs) on the 4.6 Northstar, it is probably a little more complicated, especially if you are not getting a check engine light (yet)-carefully open the plug wells by removing the cover and the COP's one by one, and look with a flashlight (and possibly a mirror) down the wells for oil puddles at the bottom. This could cause a coil misfire. Or you could wait for a check engine light to come on and have it scanned for a code, since this will give you the actual cylinder misfire location. Depending on how long it has been since it was last done, you may be due for new plugs, a cleaned MAP sensor, air filter, and general important preventative maintenance like a trans service and oil change.

Apr 18, 2011 | 1998 Cadillac DeVille

1 Answer

Engine light on


Have you checked the spark plugs since the light came on? you say that you belive they caused the light to come on? If this is true, are you sure that you spaced them properly? Proper spacing is crucial to making sure they fire correctly and every time. Also, are the correct wires put back in the correct firing order? If all this has been done correctly, take a look at the spark plugs. Do they still look new? Are they covered with oil or early signs of excessive corrosion? Appearences by any of these could point to problems with gaskets. Hope this helps.

Apr 10, 2010 | 1999 Ford Taurus

1 Answer

I need a maual for a 2003 Suzuki Limited Edition XL-7


You might be mistaken about the check engine light. I have done all the oil changes on my wife's 2003 XL7 and never once have I had to reset anything. If you mean the SERVICE ENGINE SOON lamp, that means the computer detected a problem with the emission control (or someone didn't put the gas cap back on correctly during the last trip to the gas station). Check the gas cap 1st, just take it off and put it back on, making sure to give it a few "clicks" past the stop. If after a few days the light doesn't go out head over to a suzuki dealership and have your ECS checked out.

Mar 28, 2009 | 2003 Suzuki XL-7

2 Answers

VW Passast low oil - light came on - ok to drive?


If you are not driving far no problem. If you are just put a quart of oil in it until you get to the station.

Dec 10, 2008 | 1999 Volkswagen Passat

2 Answers

Check engine light after oil change


If it is the service engine light, go to Auto Zone and they will put a scanner on it for free and diagnose the code. I may have fixed the same problem with my daughter's 2004 Dodge Stratus 2.7L V-6 a few months ago. Is it the "Oil Pressure Light" or the service engine light? My daughter's car had a sporadic low oil pressure light. Checking the actual oil pressure is more work, so I guessed it was the Oil Pressure sending unit and it was. When I took it off it the electrical connection was soaked in oil due to some internal failure. I put a new oil pressure sending unit on and the oil pressure light has not come back on.

If you remove the wire connector and there is no oil on anything, try sparying it with electrical parts cleaner and putting it back together. If the oil light is still on you will need to replace the sending unit.

It is an easy job, but it must be done from the underside of the engine in a tight space. Make sure the enginer is cool because the sending unit is close to the exhaust. There is an aluminum heat shield with three (3) bolts that needs to be removed and is most of the work. You will need to plug the hole with a clean rag or wait for the next oil change to do the job and replace it after you drain the oil.

If the easy steps above do not solve the problem then you may have bigger trouble like a bad oil pump, or worse yet, a really worn out engine that needs a rebuild.

Just last week, I has a SEL scanned at Auto Zone and it turned out to be the Engine Coolant Temperatuere Sensor. I removed the electrical connection and sprayed it with electric parts cleaner and put it back together. No light since then. Good Luck!

Oct 04, 2008 | 2004 Dodge Stratus

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