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Tom
Tom, ASE Certified Technician
Category: Car
Satisfied Customers: 25946
Experience:  ASE Certified Master Technician
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HAVE A 2005 VW JETTA WITH A 2.5 LITRE STANDARD TRANSMISSION

Customer Question

HAVE A 2005 VW JETTA WITH A 2.5 LITRE STANDARD TRANSMISSION WITH PO300 RANDOM MISSFIRE, PO301 AND PO302 MISFIRES ON 1 AND 2 RESPECTFULLY XXXXX XXXXX CRANK SENSOR ALONG WITH PO2279 INTAKE AIR SYSTENM LEAK. I HAVE CHECKED THE PLUGS AND IGNITION COILS ALL OK, I HAVE REMOVED AND REPLACED THE INTAKE PLENTUIM GASKET( I EVEN WENT AS SO FAR AS TO DO A SMOKE TEST WHILE I HAD IT OFF THE CAR FOUND NOTHING BUT SEALED ALL THE SEEMS WITH EPOXY JUST INCASE. THE CAR DOESN'T HAVE A MASS AIR FLOW SENSOR CODE BUT I SWAPPED IT WITH A KNOWN GOOD ONE JUST IN CASE BUT NOTHING CHANGED I ALSO CHECK FOR A CLOGGED CONVERTER NOTHING COMPRESSION CHECK SHOWED ALL CYLINDERS R GOOD
Submitted: 7 years ago.
Category: Car
Expert:  Tom replied 7 years ago.
Does the car actually run rough?
Customer: replied 7 years ago.
VERY RUFF AND CONTINUES TO GET WORSE
Expert:  Tom replied 7 years ago.
Does this seem to get wore in the rain is there a difference in colder weather then hot?
Customer: replied 7 years ago.
WE ARE IN NEW ENGLAND RIGHT NOW IT HAS BEEN RAING FOR 35 DAYS STRAIGHT SO THE WEATHER IS CONSSITANT IT RUNS THE SAME REGAURDLESS
Expert:  Tom replied 7 years ago.
Ok there are numerous problems with the coil packs how did you check the coil pack to make sure its good it needs to be checked when its hot
Customer: replied 7 years ago.
I SWITCH THEM OUT WITH BRAND NEW ONES
Expert:  Tom replied 7 years ago.
Ok just checking going over the most common issues first ,how about the coolant temp sensor have you replaced that?
Customer: replied 7 years ago.

I HAVE A SNAP ON MODIS HOOKED UP AND DON'T SEE ANYTHING WRONG WITH THE TEMP SENSOR AND NO CODES HAVE COME UP FOR IT AFTER 15 TEST DRIVES

 

Expert:  Tom replied 7 years ago.
Have you checked the egr valve?
Customer: replied 7 years ago.

NOT YET BUT I WILL TAKE A LOOK AT IT

 

Expert:  Tom replied 7 years ago.
Ok see if its operating properly and if its clogged with carbon let me know
Customer: replied 7 years ago.
OK GIVE ME ABOUT AN HOUR
Expert:  Tom replied 7 years ago.
No problem ill be here
Customer: replied 7 years ago.
THE EGR VALVE WAS DIRTY BUT NOT PLUGGEDI HAVE ALL THE CODES BACK NOW INCLUDING MISFIRES ON ALL 4 CYLINDERS, PO0016 CRANK SENSOR PO300 RANDOM MISFIRE PO 301 PO302 PO304 PO305 P2279 INTAKE AIR SYTEM LEAK
Expert:  Tom replied 7 years ago.
Is it making any unusual sound like a whistling noise like a vacuum leak
Customer: replied 7 years ago.
NO I TRIED TO ENRICH IT WITH SOME PROPANE BUT NO RESULTS
Expert:  Tom replied 7 years ago.
OK did you check to see if the pcv valve is operating ok
Customer: replied 7 years ago.
YES I DID NOTICE WHEN I TAKE THE DIPSTICK OUT IT ACTS LIKE THE OIL CAP IS OFF YOU KNOW HOW IT SOUNDS WHEN THE CAP IS OFF, JUST LIKE THAT BUT A LITTLE MORE SO
Expert:  Tom replied 7 years ago.
Ok give me a little time to do some more research ill post what I find later
Tom and 6 other Car Specialists are ready to help you
Customer: replied 7 years ago.

ok thanks this car is starting to get me upset

 

Customer: replied 7 years ago.

I DID NOT MEAN TO HIT ACCEPT THE PROBLEM HAS NOT BEEN RESOLVED

 

Expert:  Tom replied 7 years ago.
No problem I will continue to work with you regardless till we figure this out or you can contact customer service for a refund , I'm not here to just take your money , here to figure this problem out
Customer: replied 7 years ago.
OH I KNOW, JUST TIRED MORNING
Expert:  Tom replied 7 years ago.
Ok im still doing some research so dont give up
Customer: replied 7 years ago.
OK I'LL HANG LOOSE I HAVE SOME OTHER CARS TO WORK ON ANYWAY
Expert:  Tom replied 7 years ago.
ok
Customer: replied 7 years ago.
WE JUST GOT A CRANK POSTION SENSOR IN IT AND STILL RUNS JUST AS BAD COULD THIS THING HAVE A BAD COMPUTER
Expert:  Tom replied 7 years ago.
Yes thats what its looking like either the computer is bad or the harness is chewed from a rodent or a wire broke
Customer: replied 7 years ago.
OK I'LL LOOK AT THAT
Expert:  Tom replied 7 years ago.
Ok

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