2007 525i 5 series wants to start but does not. Had a misfire in 6 changed out all spark plugs and coils.also battery

Expert's Assistant chatimg
Customer: 2007 525i 5 series wants to start but does not. Had a misfire in 6 changed out all spark plugs and coils.also battery new
JA: Have you changed a battery before?
Customer: On this car first time
JA: Are you fixing your 525i yourself? What have you tried so far?
Customer: Yes myself might be ibs
JA: Is there anything else the Mechanic should know before I connect you? Rest assured that they'll be able to help you.
Customer: No
Answered by Steve in 1 min 1 year ago
Auto Mechanic

35,686 satisfied customers

Specialities include: Automotive Mechanic, Small Engine Repairs, Auto Body Repairs, Diesel Engine Repairs

Hello and welcome


The fist thing to do is try a second key and double check the fuel pump fuse if you have not done so.

If no luck, then this would indicate a lack of spark, or lack of fuel or lack of compression.

Lack of spark would commonly be a bad crank sensor, or problem with the ecu (engine control computer) or ecu power supply.  Sometimes an anrti theft issue.

Lack of fuel would be a failed fuel pump, bad filter/pressure regulator or problem with the fuel pump power supply (relay if fitted, wiring, etc).

The most likely of the above would be a bad fuel pump, but additional checks will need to be made to verify.

If you are able you can try to carefully start the car using starter fluid spray. If it starts using this, then you have confirmed that you have spark and that the problem is with fuel supply.

You can also check for power at the pump and to see if it is running.

The most likely of all the above would be a failed fuel pump which would require it be replaced.

Wow that's a lot of possibilities
At first it was having problems trying to stay on then it just died try to restart nothing sound like it wanted to start nothing then I had a cold of them p0306 misfire 6 and a too lean Bank 2 code I replaced all spark plugs ignition coils I also change the battery but the new battery is lower than before the original battery was 900cc 1100 new battery 850 CC 1000and even with the new batteries something keeps draining the battery and it's not even running is there a way I can reset with the OBD 2 tool the ECU
I've checked all fuses relays fine I believe I used to hear the gas pump go on when I would first switch the key in the backseat but I don't hear it no more maybe the computer has some kind of shut off because of the battery thing I don't know

There is no ecu reset

Sounds like the pump isn’t running then because it’s faulty or not getting power

Well I guess I'll just go down that list of things you had mentioned starting I guess with the testing of the pump. Oh oh but another thing I disconnected the fuel line going to the I can't remember the name but gas shut out of it so it showed there was pressure in the line from the gas pump is that true or would it just be like that from
I just remembered the line that leads to the fuel injectors had pressure

It could just be residual pressure or it could be insufficient pressure

Well in any case if the ECU was bad or something else with the electronics holding it show me a code on my obd2 toool
Okay got it this last one is my last question I know it's a little frustrating

No it probably wouldn’t show you a code on a basic obd scanner for any of this

I have a Bavarian Technic Professional Kit that should be arriving sometime this week are you familiar with that and would that be be a better tool to use
Thank you for your help I appreciate your time and patience

I’m not familiar with it

Okay thank you again

You are welcome

Read less
35,686 satisfied customers
Auto Mechanic
Auto Mechanic

35,686 satisfied customers



Licensed mechanics

31,131 satisfied customers

Pearl avatar
Steve Pearl, Mechanic's Assistant
14 Mechanics are online right now.
Related Car Questions
Bmw 535xi no crank, no start, has power foe lights tho. It
CEO/Lead Technician
2,262 Satisfied Customers
My 2007 bmw 335i has a no start condition, it cranks but it
Lead Technician
425 Satisfied Customers
No start, No no, 2007 bmw 525i 5series, Yes,Tries to start
BMW Diagnostician
2,186 Satisfied Customers
2007 525i 5 series wants to start but does not. Had a
BMW Diagnostician
2,186 Satisfied Customers
Well I am trying to fix my car, I put a new battery and IBS
Car Specialist
10,728 Satisfied Customers
How it works
logoAsk for help, 24/7
Ask for help, 24/7
Members enjoy round-the-clock access to 12,000+ verified Experts, including doctors, lawyers, tech support, mechanics, vets, home repair pros, more.
logoExpert will respond in minutes
Expert will respond in minutes
After you reach out, we match you with an Expert who specializes in your situation. Talk, text, chat, whichever you prefer.
logoSave time & money
Save time & money
No scheduling hassles, missing time from work, or expensive consults.
A JustAnswer membership can save you significant time and money each month.
Sarahesq and 87 other Automotive Mechanics are ready to help you.
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.
Last Updated: 12-20-22
Why you’ll love JustAnswer
JustAnswer is the best way to get expertise on-demand from doctors, lawyers, vets, mechanics and more. Since 2003, we’ve helped more than 9 million people in 196 countries and have an A+ rating with BBB and a 9.6/10 rating with TrustPilot.
Highly rated, verified Experts
We pride ourselves in our 8-step verification process including license and credential checks. Vetted by us and rated by customers, like you.
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.
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.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
Web sites like justanswer.com/legal ...leave nothing to chance.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

JustAnswerHomeAboutCareersPressPartner ProgramBlogCountries
MembersHow it worksLoginRegisterCategories
ExpertsMeet the ExpertsExpert qualityBecome an Expert
SupportHelp CenterContact Us

© 2003-2023 JustAnswer LLC. All rights reserved.

Privacy PolicyTerms of servicesContact usSitemap
DMCA.com Protection Status