Q: I just got my 99 BMW 528i back had a transmission put in was running fine but out of nowhere when I put it in gear it's stallin

asked by on

Just got my car back. Had a transmission put it. Was running fine until yesterday when I put it in gear it's stalling I put in octane booster because it was sitting for like 4 months so figured bad gas runs when it's idle but stalls when in gear

My car has 217000 miles.
My car has an automatic transmission.

Stalling can be caused by a number of issues. A vacuum leak can be a cause. If during the repairs, a vacuum line was left loose or the air intake tube was cracked/damaged. Too much air can effect the air / fuel mixture and when the idle drops when shifting out of park, the engine can stall. Other components such as the idle air control valve and throttle position sensor can cause the same issue. Even if a fault code is not present for either, they can be slow or lag in their response. If they lag enough, the engine can stall before they can compensate for the idle drop when shifting out of Park. With the proper scan tools, a certified technician can look into the stalling to determine if fault codes are present or if any of the sensors are not responding correctly. A simple code reader does not give you actual sensor values.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. I just got my 99 BMW 528i back had a transmission put in was running fine but out of nowhere when I put it in gear it's stallin

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How to start the car again?

When you try to start the vehicle, a small amount of fuel is injected into the cylinders to promote fast starting. Sometimes what happens is that with multiple attempts at starting, the vehicle essentially floods itself to the point that...

Q: Clicking sound when turning over.

This may be related to a faulty starter solenoid. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. When this fails, it may cause a clicking sound and will not...

Q: Leak coming from fuel injector

Hello. If you see a leak in a fuel injector the car should not be driven until repaired since fuel is flammable. Along with replacing the fuel injector, all of the O-rings on the other injectors should be replaced to...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.