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Bmw starting problem

The car won't turn over and start, fuel pump is fine, along with the battery as well

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  • Cars & Trucks Master
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Have a load test done on the battery as it may be failing under load. Remove battery terminals and clean both posts and terminals with sandpaper until you see shiny
metal. The black coating is lead sulphate which has a high resistance to current flow both into and out of the battery.

Posted on Jul 21, 2013

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Posted on Jan 02, 2017

  • 635 Answers

SOURCE: 2006 dodge grand caravan-car won;t start.

Test at the spark plug if you are getting current there with a cheap spark plug tester, if not, it could be the spark box. ( it used to be an ignition coil on older cars ) double check the computer for codes which may lead to a cam sensor not giving the PCM information.

Posted on Mar 30, 2010

SOURCE: I changed the key batteries

stick the key in the ignition, turn it to the on position, remove it within 5 seconds, then hold the unlock button down and press the lock button 3 times within 10 seconds and release both buttons. The doors should lock/unlock to give you confirmation and your key should work.

Posted on Jul 05, 2011

  • 5370 Answers

SOURCE: Car will turn over but won't start. Through the

No noise from fuel pump when you turn over the car .First thing get voltage at fuel pump relay checked, is there 12 volt to the relay.If no, then problem is again the relay.--------- To reconfirm the problem, try other test, that is remove the relay and by pass the relay terminals with a jumper wire .Then with 12 volt external battery give power to fuel pump connector and see, if the fuel pump starts, then its clear that fuel pump relay is faulty.----------- Also other problem can be fuel pump inertia switch.If the inertia switch is faulty then also fuel pump will not start.-------- The fuel pump relay on a 1995 Ford Explorer is in the power distribution
box, in the engine compartment, driver's side near the firewall.----------
The fuel pump inertia switch is in the right front passenger area
it is below the dash but above the carpet in the right hand corner.--------
Its a push button type inertia switch.
--------
Fuel Pump Activation
When ignition switch is turned to START position, PCM operates fuel pump relay to provide fuel for starting engine. PCM senses engine speed and shuts off fuel pump by opening ground circuit to fuel pump relay when engine stops or engine speed drops to less than 120 RPM. When ignition switch is in ON position, EEC power relay is energized (contacts closed). Power is provided to fuel pump relay and timer in PCM. Fuel pump receives power through fuel pump relay contacts.
Inertia Fuel Shutoff (IFS) Switch
All models use an electrical interrupt switch in fuel system. During a collision or vehicle rollover, electrical contacts within inertia switch open, shutting off fuel supply to electric fuel pump. Fuel supply is interrupted even when engine is running.
A reset button is located on switch assembly. If electrical circuit trips, vehicle will not restart until switch is reset. Fuel system should be inspected before resetting switch.
IFS switch is located under instrument panel, near right side of transmission hump.
----------- If the fuel pump relay, the inertia switch and fuel pump all checked ok, and fuel pump is working with direct 12 volt source to fuel pump.Then problem relates to computer.The computer (power control module, PCM) is faulty and has to be replaced.--------- This will help.Thanks.Helpmech.

Posted on Jul 17, 2011

Testimonial: "Thanks. That was the best answer yet.I didn't want to hear that the PCM might need to be replaced but the car has served it's purpose through the year"

  • 5370 Answers

SOURCE: My bmw 320i e90 2005 only cranks but won't start

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.
Thanks.

Posted on Mar 01, 2012

tayjoejoe
  • 2185 Answers

SOURCE: 2003 cavalier cars turns over but won't start, changed plugs, coil pack, map sensor, starter, crank sensor, oxygen sensor, fuel pump works help?

Maybe the antitheft system. Read thru this link

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on May 17, 2012

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My bmw 320i e90 2005 only cranks but won't start


Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.
Thanks.

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We can diagnose on my site with diagrams and you speak with a mopar mechanic along with phone support if needed www.expertcaradvice.com

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Hi.

If it does turn over and electrical works, then the problem is unlikely the battery. You can try jump starting. If it cranks when jump-starting it may be a weak battery, starter motor or alternator, but I don't think that this is the problem.

Check if there is spark on all cylinders. Do a code scanning (this car is OBD1, you will need to do the scan at the dealer place or to find a BMW OBD1 tool- Universal OBD2 scanner will not work on a 1994 BMW). If the codes return misfire or mixture related errors check fuel pressure, check sensors and parts that determine the mixture (MAF/MAP, AIT, O2 sensors, IAC and EGR system), check the vacuum system for leaks and check the crank sensor.

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