How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask rpmdiag Your Own Question
rpmdiag, Tech and Instructor
Category: BMW
Satisfied Customers: 7752
Experience:  Since 1975
Type Your BMW Question Here...
rpmdiag is online now
A new question is answered every 9 seconds

It won't start. It cranks but no start, and it ran fine when

Customer Question

It won't start. It cranks but no start, and it ran fine when I parked it at work in the morning
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: The battery is in the trunk. Like I said, the car turns over just fine
JA: What is the model/year of your BMW?
Customer: 2001 525i
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Yes, and I haven't tried anything yet
JA: Anything else you think the mechanic should know?
Customer: I installed a performance chip the previous night. I woke up in the morning and the car ran great. Then I parked it for my work day, and when I got off, it wouldn't start. I came back and tried again the next day after unhooking the battery and hooking it back up, and it started but immediately shut off, like there is no fuel getting to it. Also, the lights on the radio arent coming on, but the radio works. That didnt happen before either
Submitted: 11 months ago.
Category: BMW
Expert:  rpmdiag replied 11 months ago.

Hi, welcome to Just Answer. I’m Ron and I’ll be helping you
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

Okay, we need to check fuel pressure with a gauge and also check for spark at a plug with a spark tester. We're missing one of these. let me know what you find.

thanks, Ron

Customer: replied 11 months ago.
With the key on, there is no fuel coming out of the fuel rail when I push in the valve
Expert:  rpmdiag replied 11 months ago.

Okay, then there is either no fuel pressure or no power going to the pump. Check for power next seeing that you have zero. Check fuses and relays under the hood and in the car.

Thanks again and please remember to rate me and keep this link in case you need me again later on.


Expert:  rpmdiag replied 11 months ago.

Hi, I'm following up to see if you have any more questions.

Thanks, Ron