VW

Have Volkswagen Questions? Ask an Expert Now.

Ask an Expert,
Get an Answer ASAP!

VW

Pulling my hair out on this. 2006 Jetta 2.5. right now code

Customer Question
is P0507 revs higher than...
Pulling my hair out on this. 2006 Jetta 2.5. right now code is P0507 revs higher than expected. I have had P0101 mass air performance, P0171 lean. I replaced the torn pcv diaphragm with a Dorman kit and that didn't do much, had lots of crankcase vacuum until I shortened the spring on the diaphragm, then vacuum was normal. I am giving up on that today though and ordered a new VW valve cover. On a test drive yesterday all seemed well and check eng light was off until all of a sudden it would keep the revs way high, like 3k, when you lifted the throttle. Eng light came back on for P0507 revs higher than expected. Throttle has been cleaned. High miles, 175k, runs very well. Used car lot here, can't pass e test with light on. No apparent vacuum leaks. Hose to pcv is good. Help please, Jack
Submitted: 2 years ago.Category: VW
Show More
Show Less
Ask Your Own VW Question
Answered in 4 hours by:
1/13/2016
VW Mechanic: Matt, Engineer replied 2 years ago
Matt
Matt, Engineer
Category: VW
Satisfied Customers: 22,475
Experience: Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
Verified

Hello

This could be an airleak after the airflow meter, any air dragged in here isn't 'seen' by the ECU and so not compensated for and can lean the engine out and can also allow the engine to rev up when not desired causing rough running.

As its a mechanical fault it tends not to turn on the fault light and you can sometimes hear a 'hissing' noise with the engine running.

Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts.

The best way to locate a leak is to have the engine running and warm and then spray lighter gas /propane around each joint in turn. If the engine rev's up you've found your leak.

Now you might think that spraying lighter gas around a hot engine isn’t wise, however the flash /ignition point of gas is about 400°C so you need a naked flame or spark to set it off and I’ve used this method for many years without incident.

Work your way through each possible joint one at a time and you should find it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to provide a spraying 'wand' and allow a direct blast of gas into each area, especially those difficult to reach with large implements.

It’s also worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will all result in insufficient fuel being delivered to the engine

Might also be worth cleaning out the throttle body as these get clogged up with carbon and some brake cleaner washed through helps free things off.

Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick fault find if you unplug the meter and run the engine without it.

if the engine condition is the same then chances are the meter or the connection to it is faulty

Air leaks are very temperature dependent as gaps can open or close up as things expand with heat, so the weather and engine temperature can effect them.

This leads them to be quite intermittent in the case of mild leaks

its also worth cleaning the airflow meter by removing it from the car and spraying the exposed sensor wires inside the tube with a brake or switch cleaner - ensure that the cleaner is one of the old fashioned, non Eco type that does not leave a residue

On no account touch the sensor wires with anything physical as they are extremely fragile

Ask Your Own VW Question
Customer reply replied 2 years ago
there are no air leaks. Have used propane and the smoke machine. Are you a VW line tech? I know this motor has some peculiarities and I was hoping to find someone very familiar with this setup.
VW Mechanic: Matt, Engineer replied 2 years ago

helllo

I'm not a dedicated VW tech so I'll opt out if you would prefer someone else

however these cars can suffer from the brake booster leaking over time and the engine then Leaks through this area

if you clamp off the vacuum pipe to the booster and the situation improves then its possible that this is the problem

Ask Your Own VW Question
Customer reply replied 2 years ago
I need a VW tech familiar with this car. They're a little different, like brake booster hooks directly to vacuum pump with no connection to intake. Please opt out, Thanks Jack
VW Mechanic: Matt, Engineer replied 2 years ago

Fair enough

good luck

Ask Your Own VW Question
Customer reply replied 2 years ago
thanks Matt. I hope somebody chimes in
VW Mechanic: vwtech0405, VW Technician replied 2 years ago
vwtech0405
vwtech0405, VW Technician
Category: VW
Satisfied Customers: 10,958
Experience: VW Master Technician VW Certified
Verified

I can help you , has you received the valve cover yet ??

Ask Your Own VW Question
Ask vwtech0405 Your Own Question
vwtech0405
vwtech0405
vwtech0405, VW Technician
Category: VW
Satisfied Customers: 10,958
10,958 Satisfied Customers
Experience: VW Master Technician VW Certified

vwtech0405 is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

vwnewton

vwnewton

VW Owner,ASE Master and L1 Advanced

307 satisfied customers

25 years of VW obsession turned into a job, last 15 years as a VW Tech.

VWDoc

VWDoc

Independent VW Shop owner

1,738 satisfied customers

20 years of experience working with VW's. Independent European shop owner and technician.

Martin

Martin

auto electrical

776 satisfied customers

South African Trade Diploma in Auto Electrical

Matt

Matt

Engineer

22,475 satisfied customers

Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

482 satisfied customers

Have owned a repair shop for 25 yrs.

Tim Mohr

Tim Mohr

ASE MASTER TECH

411 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Chris(aka-Moose)

Chris(aka-Moose)

VW Technician

274 satisfied customers

16 years of experience

< Previous | Next >

Related VW Questions
I need a code for my VW 1999 GolfGLRalky GL. No thanks you
Hi I need a code for my VW 1999 GolfGLRalky GL JA: Okay, I'll connect you to the mechanic to go over that information regarding your Volvo GL. Before I do, is there anything else you want him to know?… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
Wont start... cranks... seems to have fuel pressure,
wont start... cranks... seems to have fuel pressure, spark... … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,446 satisfied customers
Code on my VW Golf Radio 1999 Volkswagen GL5 Hatchback and I
Code on my VW Golf Radio 1999 Volkswagen GL5 Hatchback and I had a battery put and not Radio… read more
eurotec
eurotec
Vice President / Manager
Associate Degree
11 satisfied customers
Well im not sure. we replaced the fuel pump the fuel pump
well im not sure. we replaced the fuel pump the fuel pump relay the crank position sensor the coil pack, and still no spark. i have a 97 vw jetta … read more
Todd M
Todd M
Owner
ASE Certification
1,492 satisfied customers
My climate controller doesn't blow air on any level. About a
My climate controller doesn't blow air on any level … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Chech engine light has been on since i got the car, p0341
chech engine light has been on since i got the car, p0341 have replaced camshaft positon sensor , coolent temp sensor, all timing parts and cooling system. … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Just finishing replacement of the brake master cylinder and
just finishing replacement of the brake master cylinder and brake booster. When i reconnected the battery, the brake tail lights came on & stay on. I messed with the switch on the brake pedal, but pus… read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Well when he warms up it won't shift into 3rd 4th 5th or 6th
Well when he warms up it won't shift into 3rd 4th 5th or 6th Gear it's lips … read more
Martin
Martin
auto electrical
Vocational, Technical or Trade Scho
776 satisfied customers
All my instrument trouble lights are on in my 2014 VM Jetta
all my instrument trouble lights are on in my 2014 VM Jetta SE, Cannot reset them … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
2011 JEDDA SE (GAS) window washer pump/wiper blades combo
2011 JEDDA SE (GAS)window washer pump/wiper blades combo not operating.Wiper blades operate when used independently. Tried to use pump and fluid did not come out but could hear pump while i was drivin… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Just replaced the inner CV boot of my 06 TDI golf. i have a
Just replaced the inner CV boot of my 06 TDI golf. i have a vibration coming from the front passenger side that I assume is related to the boot change. Not sure of the cause. Nil adjustment to tie rod… read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
I need fuse box layout and fuse # for low beam headlights on
I need fuse box layout and fuse # for low beam headlights on 2012 vw beetle … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
I can't identify fuses on my Jetta. But I can't find
Yes but I can't find anything related to fuses diagrams … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Tengo un golf 2.0 4 mk4 2001 prende muy bien pero al
Tengo un golf 2.0 4 mk4 2001 prende muy bien pero al acelerarlo estando parado no sube más de 3000 revoluciones y también cuando lo estoy corriendo me hace lo mismo y como es automático no me hace los… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My check engine light is flashing and my car shakes a little
My check engine light is flashing and my car shakes a little when in park … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
2012 passat 2.5l low oil pressure. installed a mechanical
2012 passat 2.5l low oil pressure. installed a mechanical gage. reads approx 15 lbs. at warm idle. … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Did a smoke test, smoke coming from between engine and
did a smoke test, smoke coming from between engine and transmission vehicle is a 2009 golf gti … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
110 satisfied customers
Alarm system on my 2013 VW Jetta 2.5SE is locked on and I. I
Alarm system on my 2013 VW Jetta 2.5SE is locked on and I … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,446 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x