Starting problems

10

Asked by Jun 04, 2016 at 07:45 PM about the 1989 BMW 5 Series 535i

Question type: General

I have a 1990 530 I BMW that Battery is being
drained down and it won't start unless I prime it
through the air box and I was told it was a thermo
switch and where can I find the thermal switch
and how does it affect the initial startup

2 Answers

222,325

Battery draining is from a parasitic draw, you will need to do some diagnostic work to figure out what circuit. How old is the battery? BMW's need a fully charged battery to operate. But you said you have to prime it, that to me say fuel system. Do you hear the fuel pump prime when you turn the key? If not, then it could be a faulty fuel pump. Check the fuses too. See if you can borrow a fuel pressure gauges to check the fuel pressure if you want.

Best Answer
10

Yes as fuel pressure at the fuel rail like I said once it starts and runs normal then I shall take you off I have to prime it again someone said about a a thermal switch but what has that to do with initial startup please I need your helpn and I put a new battery in it and it's raining that one too

Your Answer

Add photo

Related Questions

  • Starting problems

    I have a 1990 530 Bmw it has problems starting when I first go to start it unless I wont start unless I prime it through the air box and has pressure at the fuel rail and it is draining the battery...

    1989 BMW 5 Series 535i

    -

    General

  • Starting problems 3 answers

    I have a 1990 530 BMW and the battery is draining and it won't start unless I prime through the air box but once it starts it runs like it's regular and then when I stop shut it off I have to prime...

    1990 BMW 5 Series 535i

    -

    General

  • Starting problems

    How would the thermal switch affect my initial start up on my 1990 530 Bmw

    1990 BMW 5 Series 535i

    -

    General

  • Starting problems 1 answer

    I have a 1989 530 I BMW it won't start when I go to start up but unless I prime it through the air box I have fuel pressure at the fuel rail and I put a new battery in my battery keeps getting drai...

    1989 BMW 5 Series 535i

    -

    General

  • Starting Problems 2 answers

    I have a 1984 325e. My problem is when I try to start it up on a really hot day it takes ages to start. It starts up much faster when it is cooler outside. I'm pretty sure it is something with my fuel...

    1984 BMW 3 Series 325e

    -

    Maintenance & Repair

Search BMW 5 Series Questions

BMW 5 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,940
#2 Michael Branan
Michael Branan
Reputation 770
#3 Robert Charlson
Robert Charlson
Reputation 670
View All

Related Models For Sale

Used BMW 3 Series
1,468 Great Deals out of 38,438 listings starting at $1,700
Used BMW 7 Series
166 Great Deals out of 5,889 listings starting at $3,400
Used BMW 6 Series
114 Great Deals out of 3,236 listings starting at $7,790
Used BMW M5
26 Great Deals out of 657 listings starting at $9,499
Used BMW M3
67 Great Deals out of 1,922 listings starting at $4,350
Used Honda Accord
886 Great Deals out of 82,090 listings starting at $999

Used Cars For Sale

2016 BMW 5 Series 535i For Sale
22 Great Deals out of 731 listings starting at $42,465
2015 BMW 5 Series 535i For Sale
62 listings starting at $27,599
2014 BMW 5 Series 535i For Sale
41 Great Deals out of 598 listings starting at $18,500
2013 BMW 5 Series 535i For Sale
22 Great Deals out of 265 listings starting at $19,990