Skip the auto shop - Our mechanics make house calls

Q: crank no start problem

asked by on

Just finished replacing exhaust manifold/ catalytic converter and o2 sensors on 2003 altima. recently replaced spark plugs and crankshaft and camshaft sensors as well. now i go to start the car and it cranks but wont start. also when i press the gas pedal it doesnt budge or anything. i have half a tank of gas. i have nooooo idea what it could be now. also, before i changed the manifold, the car started but just idled rough and shook.

My car has 199000 miles.
My car has an automatic transmission.

A: We need to start by considering the amount ...

We need to start by considering the amount of repair work that has been done recently. It is always wise to double check those repairs made are still holding. A poor connection from one of the sensors your placed could be causing these issues. Before assuming the worst, check the simple problems first.

If not related to the previous issues, when was the last time you had the fuel filter and or pump looked at. A clogged fuel filter will rob the engine of the gas required for proper combustion. The fuel pump can also fail and cause starting issues. Test the pump: when the key is turned to accessory, do you hear the pump prime? It will sound like a faint "whirling" (the sound of an impeller turning). If the fuel system checks out, other issues could be from a number of relays, bad spark plug wires, or even a problem with the ECU. You will have to go through the process of elimination until the issue is found.

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: Truck idles rough

This is a sign of a failing idle air control valve. This is a unit that is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into...

Q: Air conditioning blows hot air

Hello. If the AC will not blow cold air, then it may indeed be low on refrigerant. Most AC systems will not allow you to simply add refrigerant without jumping the compressor to get it to turn on. If the...

Q: No crank no start at witts end

This sounds like potentially a faulty starter solenoid. Try checking for power to the solenoid. The clicking sound is common sometimes when the battery is weak, but is also a common sign of a faulty starter solenoid. Have a qualified...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.