Skip the auto shop - Our mechanics make house calls

Q: P0304 code.

asked by on

I've had this vehicle for three years.It has been inoperable for all but six months of that time due to a bent intake valve and jumped cam follower in the #6 cylinder. I just reinstalled the engine after a complete top end rebuild and timing set replacement (using the OTC cam timing tool set.). I spent most of yesterday trying to get it to run. It will start then rev to 2k rpm and stall when not pushing the gas. If I feather the gas while cranking I can get it to climb in rpm very slowly and roughly. During two attempts at getting the rpms up yesterday the vehicle stayed running but rough idling at 1-1.5k the longest instance was about 5-8 mins before the engine stumbled and stalled. I have replaced the plugs and wires, fuel pump,injectors, and triple checked for anything unplugged or damaged ( I even changed the intake gaskets a second time). Any advice is appreciated

My car has 112000 miles.
My car has an automatic transmission.

You should make sure the mass air flow sensor is connected and inlet to throttle body hooked up. If it is and problem continues then tr to disconnect the MAF sensor and see if engine runs okay? If it does then you may have a problem with the MAF and need to replace it. If it still ran bad with it disconnected then you need to check the cam sensor adapter is installed correctly if it is the cam follower distributor housing type. If it is ont of 38 degree position then will cause loss of power.

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: Rear Driver side axle bearing

On the Grand Marquis, the front wheel bearings are of the 'hub & bearing' type. The entire hub is replaced. With the rear bearings, the axles must be removed to remove and replace the wheel bearings. Hope this helps. ...

Q: My car sounds like a motorcycle

At a quarter million miles, there are so many possibilities that I can hardly begin to speculate. But when you say your car sound like a motorcycle, I think you might have an exhaust leak. Perhaps some part of the...

Q: Van lost power and limped home. 2016 Savana 2500

As you may already know, trying to trace an electrical issue in when a vehicle goes into limp mode can be very frustrating and time consuming without having the use of a scanner. Nearly every vehicle when going into limp...

Related articles

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.