Australia Car

Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Australia Car

Bmw e46 01 model 4 cylinder rough idle only when cold when

Customer Question
it warms up its ok...
bmw e46 01 model 4 cylinder rough idle only when cold when it warms up its ok i think it has a air leak can it be the pcv
Submitted: 1 year ago.Category: Australia Car
Show More
Show Less
Ask Your Own Australia Car Question
Answered in 2 hours by:
4/6/2016
AU Auto Mechanic: Matt, Engineer replied 1 year ago
Matt
Matt, Engineer
Category: Australia Car
Satisfied Customers: 22,146
Experience: Automotive Engineer for 20 years, BEng hons degree,
Verified
Hello its possibly the PCV but 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 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 Australia Car Question
AU Auto Mechanic: Matt, Engineer replied 1 year ago
Hido you still need help?Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you
Ask Your Own Australia Car Question
Ask Matt Your Own Question
Matt
Matt
Matt, Engineer
Category: Australia Car
Satisfied Customers: 22,146
22,146 Satisfied Customers
Experience: Automotive Engineer for 20 years, BEng hons degree,

Matt 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:

Curtis

Curtis

Australia Car Mechanic

1,609 satisfied customers

Qualified Automotive Mechanic, LPG & Airconditioning Diagnostic Technician.

Glenn Bradley

Glenn Bradley

Australian Car Mechanic

699 satisfied customers

Ex Transmission Shop Owner, Driveline Specialist, 30+ years in the Australian Automotive Industry

Scott B

Scott B

Australia Car Mechanic

478 satisfied customers

Qualified Automotive Mechanic, Service Manager & Proprietor 20+ years

Technopro

Technopro

Australia Car Mechanic

149 satisfied customers

20 years of experience in Automotive Repair Techniques and Diagnosis Expert.

Matt

Matt

Engineer

22,146 satisfied customers

Automotive Engineer for 20 years, BEng hons degree,

Mark

Mark

Mechanic

618 satisfied customers

29 Years as a Vehicle Mechanic in Australian Military

Mechanic Martyn

Mechanic Martyn

Australia Car Mechanic

324 satisfied customers

Advanced trade certificate in Automotive engineering

< Previous | Next >

Related Australia Car Questions
My car loses power and high revs. Consistent when I
No, will get a mechanic but can't get one for two days and need to drive 60 k to work and back … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
The car is a 2005 e87 120i, engine lost power, code error
the car is a 2005 e87 120i, engine lost power, code error p2610, change crank sensor 6 months ago was going ok prior to this incident. change both cam sensors no change, do I need to clear obd first o… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Can anyone tell me if the Proportioning valve in the brake
Hi Guys, can anyone tell me if the Proportioning valve in the brake system on a 98' Mitsi' Pajero io, c/w ABS, is servicable or must it be replaced ? Or....can it just be done away with sice it has AB… read more
Curtis
Curtis
Australia Car Mechanic
Vocational, Technical or Trade Scho
1,609 satisfied customers
When i go up a steepish the red water light comes on, i pull
when i go up a steepish hill the red water light comes on, i pull over and let cool down and check the radiator. the radiator is full, oil is good so why is the light coming on … read more
Jake
Jake
Vocational, Technical or Trade Scho
285 satisfied customers
Territory diesel goes into limp mode. 5yrs serviced 9months
taken to dealer found fault when motor under load found fault code P045D replaced part but after fix still faulted … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
When I type the address in 2014 Kea Sportage it
Hi there, when I type the address in 2014 Kea Sportage it automatically overrides me and goes to same street name in a different suburb, how can I override the device? … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
165 satisfied customers
The glow plug light on the dash is flashing when
Hi, the glow plug light on the dash is flashing when accelerating, this does not happen when you rev the engine, without the car moving. thanks.… read more
Curtis
Curtis
Australia Car Mechanic
Vocational, Technical or Trade Scho
1,609 satisfied customers
Air bag failer. Came on today 101000kl. 2003. I wanto fix my
air bag failer JA: How long has this been an issue? How many miles are on the car? Customer: came on today 101000kl JA: What is the model/year of your VW? Customer: 2003 JA: Are you fixing your vehicl… read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
I have a 95 L200 2.5 diesel. The problem I have is that it
hi there, I have a 95 L200 2.5 diesel. The problem I have is that it gets stuck in gear e.g from 2nd to 3rd then I can't get any other gears it just locks in 3rd. I have taken the top of the gear stic… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Can you reprogram the ecu or bcm to get the electric windows
Can you reprogram the ecu or bcm to get the electric windows to work in a Landcruiser 76 series wagon Workmate. The wiring looms are the same but nothin will work. i bought the door cards and electric… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Check powertrain has come on then it runs sluggishly. Vz
Check powertrain has come on then it runs sluggishly … read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
44 satisfied customers
I'm trying to determine what the existing wires are in the
Hi I'm trying to determine what the existing wires are in the back of my tomm head unit in my 2010 hiace. I'm looking to install a new Kenwood head unit along with two new front speakers, add two 6x9"… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I am looking at purchasing a 2007 Mitsubishi Lancer CJ VR. I
Hi...I am looking at purchasing a 2007 Mitsubishi Lancer CJ VR. I have noticed that the 2007 models dont have the auxillary input in the dash (for the use of an ipod) like the 09's and 2010's do. Will… read more
Curtis
Curtis
Australia Car Mechanic
Vocational, Technical or Trade Scho
1,609 satisfied customers
My carrens has been starting intermitently of late now fuel
my carrens has been starting intermitently of late now fuel management and immob lights wont go out and wont start \ thanks… read more
Curtis
Curtis
Australia Car Mechanic
Vocational, Technical or Trade Scho
1,609 satisfied customers
Trying to replace the drivers side headlight globe on a 2004
Trying to replace the drivers side headlight globe on a 2004 E1800 SWB van … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Just want to know what service i need to do on my 200 model
Hi just want to know what service i need to do on my 200 model Celica ascent it's odometer is 291871 … read more
Mechanic01
Mechanic01
1,130 satisfied customers
Just wondering - would the electronic handbrake module fail
HI There, just wondering - would the electronic handbrake module fail without showing a waring light first?? … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
What oil do I use for transmission for a Mercedes 270
what oil do I use for transmission for a Mercedes 270 diesel … read more
Lou P. master tech
Lou P. master tech
Mercedes Benz master tech
Bachelor's Degree
649 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