Skip the auto shop - Our mechanics make house calls

Q: 1997 Saturn

asked by on

Coil packs getting fire. Runs rough. Backfires when I step on the gas pedal and no power and the service engine soon stays on flashing? I've replaced plugs and coil pack reset the SES light but it still does the same thing. Is it the crank position sensor?

My car has 120000 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in. Since the che...

Hello, thanks for writing in. Since the check engine light is on the best place to start is with the codes. These would help me to determine the problem. It sounds like there is a misfire problem. If that is also associated with a backfire, then you may have a bad valve seat which is common on this engine. A compression test would need to be done to verify this. If the compression is fine then it may be a sensor issue or the wires may be installed wrong. If you want to have this backfire checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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: Misfires, sometimes no start

A misfire and intermittent no start on this vehicle can be one or more possible problems and may even be two different problems. The misfire may be the plug wires, plugs, ignition coil or ignition module. Intermittent no start may...

Q: After driving from traffic light, engine starts smoking

Hello. Thanks for writing in about your 1999 Saturn SW2. If the only issue with the car is that there is oil getting into the spark plug holes, then most of the time this is a leaking valve cover gasket...

Q: RPM running high in neutral

High idle can be caused from several things. Your Saturn's extremely high idle is likely being caused by air leaking into the intake manifold. It's called a vacuum leak. This can be caused by a hose that has fallen off...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...