Question about 1995 Volkswagen Jetta

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I get a misfire or backfire thru the filter or airflow meter

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Back fire through the air intake is usually due to a timing issue, but could be a valve problem. See if it has jumped timing.

Posted on Oct 08, 2009


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My citreon c4 is miss firing and shuddering

Hello Denise;
Do you have random misfire or misfire on a particular cylinder?

FIRST: Read the codes with a scanner!!!

-- If its one cylinder: check the plug wires, coils, spark plug; overall you should check for electricity and spark. If these pass; you may want to perform a compression or leak-down test to confirm the cylinder is fine.

--Multiple misfiring:
Usually; when you have misfiring you would look for:
1. Check if there's a vacuum leak in the intake manifold and breather hoses; those running from the manifold, usually they may have leaks or have become cracked; any leaks into the manifold asides the airflow meter is unmeasured and will cause misfiring.
2. Check the fuel pump; use a fuel pressure tester; if you get your hands on the c4's manual you should know the optimum pressure and determine your pump is fine.
3. Check fuel filter; maybe change this out.
4. Check the integrity of the Catalytic converter; if you have a clogged converter your engine will misfire badly, rough idling will occur and it tends to run hotter, shorten the life of the airflow meter etc. This is one overlooked area; if your car is over 100k miles; just change this out.
5. Check your MAF sensor; clean with 95+% methylated spirit or other official MAF cleaners; methylated spirit works fine, just ensure it dries up nicely.

Jul 28, 2016 | Cars & Trucks

1 Answer

Rough idle problem with Santa Fe. I changed the egr valve no good. Very bad vibration it turns out my injectors where very bad and it didn't show up on many diagnostic systems plus airflow meter was bad...

no year stated
2.2 liter Diesel.
first off its not a jeep, i moved your post.

this is not a question.
and misfire is caused by over 50 things.
and the PCM is not AI yet, come back in 2050 and we might be there. (artificial intelligence, Alan Turing dream, is not here yet) sorry.
it still takes hard work, a real scan tool and experience to find problems. Did you drive the car hard with scan tool logging full time.

sounds like the problem was not the engine at all (not misfiring at all)
, but was a pure physical mech failure.
of a clutch.
any thing can break at any time, in the real world,
car has 3000 parts, any can fail.

Mar 17, 2015 | Hyundai Santa Fe Cars & Trucks

1 Answer

Where can i find the airflow meter

I don't list a mass air flow meter for your car.
If it had one it would be between the air filter and the throttle body.

Feb 04, 2013 | 2000 Saturn SL

1 Answer

P0300 Trouble Code

Those 2 codes together usually mean there is a vaccum leak(the intake is getting air that is not metered through the mass airflow sensor).Look for PCV and vaccum lines loose(you might have got it by repositioning the air cleaner)

Apr 14, 2012 | 1999 GMC Yukon

1 Answer

Check engine light is on...have replaced plugs,plug wires,massive airflow sensor,air filter,fuel filter,pulled fuel pump...seems to be ok...can still feel slight hesitation while accelerating thru...

Some check engine lights need to be reset by the OBD-II code reader. It's also possible that you've solved 98% of your problem but there's still 1 problem left (possible clogged fuel injector?) that's pulling a different error code. (possibly P0301-P0312 misfire or P0262-P0295 injector)

Best bet is to go to 1 of the auto parts chain stores that provide free diagnostic tests. If it's just a lingering old error code it will be reset or if it's something new, you'll know exactly what the issue is.

Aug 06, 2011 | 2000 Hyundai Accent

1 Answer

Have code p0300 active just replaced fuel pump, all spark plugs, wires, cap, and rotor, engine back fires, and has explosion in the air filter area

Code p0300 is multi- misfires [ any number of the cyinders ]. Sometimes when a fuel pump is replaced, the system will have air inside and will mis & backfire untill the air is cleared back thru the return line, or blead out the test port. This will set the p0300 code. It's rare to have a backfire bad enough to have an explosion, bleed the lines thru the test port untill you see no more bubbles comming out.

Jun 28, 2011 | 2003 Chevrolet Silverado 1500

2 Answers

I need to know where to find my Mass airflow sensor?

Need to know the make, model and engine size to determine part location, but those are always on the intke manifold plenum...Mike

Jun 14, 2011 | Chevrolet Malibu Cars & Trucks

1 Answer

Missing and backfiring.

have him check the egr system

May 10, 2010 | 1997 Mercedes-Benz C-Class

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