Q: 99 5.4 f150 replaced coils plugs starts but dies at 1400/2100 rpms cels are : 1262c and 10102p cel i think cats are bad butno0420

asked by on

replaced coils plugs fuel pump and relay starts but dies at 1400/2100 rpms cels are : 1262c and 10102p i think cats are bad but no 0420 or cat code i know there a leak in intake i can hear it and some of hose or starting to die near throttle body. but i think cats are the primary how do i know?

Update guy before me drilled holes from the out side of cat into it two holes about the size of a quater My car has 165 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 99 5.4 f150 replaced coils plugs starts but dies at 1400/2100 rpms cels are : 1262c and 10102p cel i think cats are bad butno0420

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: Cranks, will start if check engine light goes off. If light stays on, no start

If you have the ignition switch out of the vehicle then you may be getting a switch that is not making good contact internally. I would first recommend replacing the ignition switch and checking connector for any problems in the...

Q: Slight vibration between 50-60 miles per hour.

Hello, thank you for writing in. The suspension and tires are so closely related that an issue with your tie rods would feel like a tire problem. The technician is correct about this would cause a vibration. Did they do...

Q: Blower motor stops when I accelerate

Does the motor stop or is the location of where it blows out of change? What you may be experiencing is that, when accelerating, the intake manifold vacuum is decreased. Vacuum is used to change the vents from defrost to...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...