Skip the auto shop - Our mechanics make house calls

Q: Shutoff during start, Check Engine Light on, power loss - 1990 Mazda B2200

asked by on

My truck has difficulty starting. It often shuts off during startup. The dash is showing a Check Engine Light illuminated. When I drive it, it loses power and speed as if the engine isn't getting gas. I had the sparkplugs replaced. I had the compression testing done and the cylinders are getting 119-121 psi. What could be causing this?

A: First thing is to check to see what problem...

First thing is to check to see what problem codes are setting off the Check Engine Light. The compression numbers you mention are also pretty low, indicating worn piston rings, or burned valves. If you would like, a certified technician from YourMechanic can come to your home or office and perform an inspection of the vehicle's wiring, diagnose the Check Engine Light, as well as make any necessary repairs.

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・Save up to 30%

Get a quote

What others are asking

Q: I am losing compression, why?

Hi there, thanks for writing in. Dwindling and/or uneven engine cylinder compression is due to valve defects and/or cylinder ring wear. Additional causes are head gasket defects and there is also the possibility that your timing chain has skipped, thus...

Q: Check Engine Light and air conditioning problems

The Check Engine Light illumination is most likely due to your engine having a misfire, and also getting a code to the cam sensor. If the misfire code is pointing to a particular cylinder misfiring, there could be another problem...

Q: I changed the oil in my 2012 Nissan Sentra and now it has no power when I put it in gear.

Your car's engine oil and lubricating system should have no impact on the transmission control function. This may be related to a separate issue such as a faulty transmission control module or low transmission fluid levels. As you may know,...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...