Skip the auto shop - Our mechanics make house calls

Q: Car is bogging and losing power - 1996 Chevrolet Blazer

asked by on

Had a po102 error Maf sensor was replace with new one, clear the code, but car still has same issue with bogging and lost if power, but no more codes coming up

My car has 18500 miles.
My car has an automatic transmission.

A: It is not unusual for there to be multiple ...

It is not unusual for there to be multiple failures when there is an engine management problem, particularly on a high miles engine, so the issue you had with the defective MAF sensor may simply have been just one of the problems. On older engines, the thing to do is start with a basic compression test to determine whether you are a starting with a basically sound "mechanical base".

If the compression test checks out OK, that is, there is no mechanical problem with the engine, but you are still experiencing poor operation, a scope will reveal whether the issue is "global" (all cylinders) or limited to maybe a cylinder(s) with faulty spark plugs, wires, or a failing fuel injector. If the issue is global, everything from a plugged exhaust to a plugged fuel filter to inadequate fuel delivery have to be evaluated, but again, a scope exam will get you in the ballpark of a proper diagnosis.

I recommend having a certified mechanic, such as one from YourMechanic, determine why the car is losing power and what is necessary to get it back into good working order.

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

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!

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: Runs with starting fluid idles dies when given gas

Hi There, You may want to check to be sure the fuel pressure regulator is working properly. The fuel pressure regulator is a device which controls the pressure of fuel supplied to the fuel injectors on an engine. This works...

Q: Truck wont start on its own needs throttle to start

Hi and thank you for contacting us. There are 4 things that could cause a problem with starting and bogging of a diesel engine. First, you will need to check the air filter. Unlike gasoline engines, diesel engines require a...

Q: Cooling system won't pressurize on a 1985 Military Chevy Blazer

If it won't hold pressure, there has to be a leak somewhere. Those diesels will a lot of times start to blow head gaskets. So the first thing you'd want to do is watch my video "how to tell if...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...