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

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: Coolant spraying everywhere under hood near engine block.

Hi there. If you're having a large amount of coolant spraying under the left side of the engine of your Honda Accord, it's most likely caused by a ruptured coolant line; possibly a bypass hose or the heater core hose....

Q: rough idle, heavy missing, fault codes P0301 and P0456. lack of power, where do i start to diagnose this?

Hi there. From the description you have provided, for the P0301 rough idle and heavy misfire and P0456 evaporative small leak detected, the problems are unrelated. The P0301 is a #1 cylinder misfire code. It could be, a spark plug...

Q: Original speakers or not, 1984 Chevrolet K10

Hello. This truck would have had rear speakers if it had the upper level trim when it was purchased. The original stereo would have had speakers in the rear and in the doors. They may also have been added if...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.