Skip the auto shop - Our mechanics make house calls

Q: a very bad miss in morning

asked by on

Some mornings I start car and idles great. When I take off it shakes very bad and misses. Mechanics have replaced fuel pump, injectors, fuel filter, catalytic converter. When I finally get it to the shop and mechanics crank it to test drive it runs perfect again. Has happened about 6 to 8 times over last few weeks. No lights come on except once, service engine soon and showed the injector problem. They have also changed a couple of sensors. When giving it gas is when it misses during these times. Can't get above 15 MPH during these spells I trust this shop a lot and have used them for years. It is a 1998 Pontiac mini van loaded. Also looking for a dash panel to replace cracked one or a way to restore this one that doesn't look like a hot rod. thanks

My car has 192000 miles.
My car has an automatic transmission.

A: Hi and thanks for contacting YourMechanic. ...

Hi and thanks for contacting YourMechanic. Check the ignition system for any burned spark plugs and burned plug wires. Make sure that all of the spark plugs have a solid blue spark. If the ignition system is working correctly, then check the mass air flow (MAF) sensor to see if the contacts are damaged or if the sensor is dirty. These will cause an intermittent misfire to the engine when put on a load. If you need further assistance with your vehicle, then seek out a professional, such as one from YourMechanic, to help you with the misfire in the mornings.

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: Car rough idles and worse when engine is warm - 2008 BMW 528i

Hey there. You should first check for any problem codes. Next, check for vacuum leaks. Third, check out the idle air control valve - clean it if possible. A professional mechanic, like one from YourMechanic, can help with this diagnosis...

Q: Starter will not turn over, nor engage

Hi there, thank you for asking about your 2003 Infiniti FX45. The battery replacement has activated the "immobilizer" security feature. Consult your owners manual for instructions on how to disarm the system. Also, after replacing the battery, there is a...

Q: Truck speeds up to 60 to 40 miles an hour and then acts like its stuck in neutral.

Your truck should have the 460 E transmission, It is an electronically controlled 4 speed transmission. The fact that you don't have any transmission codes is not good news. If your problems were with the control system or the solenoids,...

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...