Top 20 1986 BMW 5 Series Questions & Answers

It sounds like either the throttle position sensor or the mass airflow sensor are bad-the TPS can be checked with a digital meter, it should give different voltage readings as the throttle is opened with the engine off, key on. The MAF can be cleaned with MAF cleaner, or will need to be replaced. Another, although less likely possibility is a clogged fuel filter.

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Verify the Main fuses in the fuse box.

You will need to check for fuel pressure or dirty filter. If you do not have fuel pressure; be sure to check fuses or any relay pertaining to fuel pump (if electric). If fuses and relays are good check or replace fuel filter. If the fuel pump is mechanical disregard fuses & relays and check or replace fuel filter. If this does not resolve the problem then the problem could be the fuel pump if mechanical, If its an electric fuel pump it could be a fuel pressure regulator, fuel pump, crimped fuel line or other wiring issue.

These are the most common things I run across, oh, a crimped fuel line can cause the problem in either case electric or mechanical. Hope this helps in some way, been awhile sense I worked with an older car.

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I am not familiar with this model but have experienced a similar nightmare on a very model. I suspect that the child safety locks are set which is stopping you opening the doors from the inside and the outside handles are not working because the latches may have been set in the locked position.

Possible switch gear unit has malfunction. Need to get it scanned to fully check this out. Don't just replace parts on a guess.... Very expensive and will cause issues when you take it to a professional

The SRS light is on because the airbag system has developed a fault and is turned off. When the problem that caused this is diagnosed and repaired the light will extinguish itself. Right now you have no airbag protection in a crash, this could cause you serious injury or ***** how much is your life worth, get it repaired. I remember well the horrible damage to the human body before safety features like Airbags and collapsible steering columns to list a few, it was not pretty.

The lift arms need replacing.

Solid electrical short. Unless u have the diagrams , tools & experience DONT TOUCH IT, bring it in to a reputable tech. Good luck

You can have a problem with the shifter cable. It will only allow it to crank and start if it's in Park or Neutral and it may not think it is. Move shifter through its gears one at a time and see if it tries to crank. That is assuming it's an automatic transmission. If it's a manual it could be a clutch pedal switch. Could even be a starter relay or loose wiring between relay and starter. Good luck.

Open your drivers side door and open your bonet. Use another battery to power up your terminals in the engine compartment. Then open your boot

Check the body control module. all window functions are controlled by it.

Check starter solinoid

change relay

Read the trouble codes for your automatic transmission using a scan tool. I like the wireless ELM327 OBD2 adapter and OBD Fusion app. The trouble codes will tell you why the transmissiion is putting the car in limp mode.