Question about Volvo S60

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This type of condition can be caused by vacuum leaks at the Intake, use a bottle of propane with a hose attached to the end and spray around the intake manifold, watch or listen for any change in the sound of the engine as it idles, also verify that there are not leaks in the exhaust by doing a smoke test, this involves injecting ATF into the engine through a vacuum hose and watching for leaks in the exhaust, the next test is the fuel pressure, make sure it is at whatever the spec is for your car, most likely about 50-60 psi, if all these tests are negative you need Volvo to hook this car up to a live engine data scanner to see what is going on, they also need to verify that all the software updates for the Powertrain control module (PCM) have been done, the bottom line here is there is no magic bullet fix for problems like this, just careful methodical testing by the book, don't throw anymore parts at this problem, that has proved by the list of parts to be a very bad idea, if you need to get the dealer involved because this is over your head do so, don't use outside shops they don't have the sophisticated test equip required to diagnose this problem, I have been a certified electronic engine control technician on Bosch fuel injection for 30 years, and have tons of real time experience to back up what i am telling you.

Posted on Sep 30, 2009


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What is the next step that i should do to find problem with my 2009 sebring to find the cause of this misfire?

do a compression check on all cylinders to make sure they are up to spec and consistent. Any chance you have a bad head gasket and getting antifreeze in the cylinder?

Feb 17, 2015 | Cars & Trucks

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I have a misfire no engine lihgt

What sort of testing was done to look for the misfires?

How was it done & the results?

Why was the injector replaced,was that one problem
& you also have others to find yet?

You have no vehicle or motor shown

No mention of scan tool data
Fuel Trim,Cylinder Misfires Counts,Number
of cylinders with a problem

Any mechanical engine testing ?

Don't need MIL Lamps on the dash to have a problem

You can see a lot with a scan tool verse a code reader

Oct 29, 2014 | Cars & Trucks

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Wondering if one or more CATS are pluged ??

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1 Answer

Where is the ignition module located on an BMW 325i 2001?

Failed ignition coils

The ones you replaced may not be the issue

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1 Answer

2000 Grand am 3.4L Misfire on all cylinders when going uphill and dies coming to a stop while Heater blower motor is running or when shifted into neutral going down hill.

I have 2003 grand prix,today I notes slight misfire,so coils or code too short.You said coils good,how about module.

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2002 Ford Escape V-6. Originally blew out the ERG. Took it to a shop and had them inspect the cats. They advised rear cat was plugged but the fron 2 were ok. Replaced Cat, Muffler, Plugs, boots and...

You have several bad COP Ignition Coils

The whole approach to solving your vehicle was wrong

I would have done a cylinder leak down test to check engine
mechanical integrety valves etc

Next, new spark plugs & at least the back 3 coils,
assuming you have a V6, because the intake has to come
off to do the plugs

Install the upper intake,smoke test for vacuum leaks,
test & replace all oxygen sensors & all cats,checked
all data,mode #06 misfire counts,fuel trim on a road test
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eg. just go thru the entire motor & fix it all

Some what similar with a 4 cyl

Not saying you neglect the vehicle, but it is not
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I'm seeing many or thousands of vehicles just on this
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bank owned anyway,who pays cash or keeps them
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1 Answer

Po302 code also po316 code

Put the old coil back in #2 & walk the new one to another cylinder

PO Codes are wrong, as many times as correct on a ford

Forget the 316

Your best to look at fuel trim with a professional scan tool
& cylinder misfire counts in Mode #06 also

Those trucks have leaking injectors some times, but that isn't
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Spark plugs can't be in there over 3 years

The front 2 oxygen sensors have to be replaced at 100,000 miles

Do those 2 items & then diagnose the misfire or walk the coils

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1 Answer

2001 Escape 3.0 L "suddenly"

go to autozone for a free code readout.

I suspect you are going to get misfire codes. You need to fix ASAP as misfire will ruin your cats which are part of teh manifolds which means abotu $1000 for both.
I think you are going to have to replace all plugs and COPS, coils on plugs. Or at least on the misfring cylinders.

The danger here also is that a shorted COP will take out your PCM, engine computer.

Report back codes and progress.

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Missing under load, number three cy,inder was

Next step is the camshaft position sensor.

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2 Answers

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The code description is a giveaway.
It could be one of the coils on the coil pack. Most coils nowadays do two cylinders each. This way car makers can get away with one coil for two cylinders.(lowers costs) One spark fires the air fuel mix in one of the cylinders and the other will fire the cylinder on the exhaust stroke. If the coils are removable, and you are fairly handy with cars,switch two around, the problem will follow the bad coil.

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