Skip the auto shop - Our mechanics make house calls

Q: Engine issues - 1991 BMW 750iL

asked by on

My car has some problems with the engine. When the right throttle body is unplugged, the left side would work well. When the left throttle body is unplugged, the right side would work well. However, with the boths sides plugged, the engine cannot rev past 1900 RPM. What should I do?

A: Your engine has gone into "limp" ...

Your engine has gone into "limp" mode. The engine computer senses that one side (or the other) is performing inadequately, which causes it to shut down that side. This is most commonly caused by fuel pump(s) failing. The fuel pump assembly should be replaced by a professional mechanic, like a certified technician from YourMechanic who can come to your home or office.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Radiator and engine leaks

Hi there. An inspection of the radiator for white residue will be necessary. Radiator leaks generally occur where the plastic side tanks are mated to the sides of the aluminum radiator core. If this is the case, the radiator will...

Q: Checking the engine by taking the intake manifold off on the Chevy 350 V8

When you pull the intake manifold off, you're going to see all the gaskets in there, and you can look at the valves. You can see if the valves have carbon build-up and if they need cleaning. There are quite...

Q: The wires coming off engine near alternator and belt assembly are burnt

Without a complete inspection of the vehicle to find out why the wires shorted it would be hard to know the exact part to buy. The harness may be just the alternator harness or the engine harness that goes to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.