Q: Q: Cranks but won't start

asked by on

I was working on my truck and I had just replaced the starter, solenoid, fuel filter, spark plugs, sparks wires, air filter. It was running fine before the starter went out know I can't find the problem
My car has a manual transmission.

Be sure there is adequate fuel in the fuel tank and that the fuel is not old. Check for adequate fuel pressure, injector operation, and a spark at the spark plugs. Basically, if the starter motor is turning the engine over rapidly, at sufficient RPM, but the engine does not catch and run, that means that there is an ignition, fuel, air induction, or mechanical fault in the engine that will have to be repaired. Strictly speaking, you should first check engine compression in the cylinders because if there is no, or inadequate, compression the engine won’t run under any circumstances. If compression is found to be within factory specifications, and there is fresh fuel being delivered by the injectors (not just "to" the injectors) and the ignition system is working, that means that the air fuel ratio of the mixture delivered to the cylinders is so far off that the mixture just won’t ignite. Such could be due to a big vacuum leak, an air induction fault like a stuck idle air control valve or, considering fuel, could be due to a failed temperature sensor that must be working properly to signal the PCM to enrich the mixture on cold start. Other common faults are defective spark plugs or a defective coil. Regardless of the underlying cause, if you request a no start diagnostic the responding certified mechanic will get the problem diagnosed and repaired for you promptly. Please let us know if you have further concerns or questions as we are always here to help you.

Was this answer helpful?
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. Q: Cranks but won't start

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: Flood Damaged Honda Accord. HELP.

Flood damage is a serious problem. When most people hear flood, they turn and run for the hills and there is a reason for it. First, even if you didn't fry all your electronics, you are asking for rust and...

Q: Q: Battery light

You may want to check the voltage to the alternator. If you have a voltage regulator that i allowing the alternator to produce too much amperage, this may cause the alternator to produce too much amperage resulting in a burning...

Q: What could cause gas to leak from the middle of my truck underneath?

It sounds like you may have a leaking fuel line. Depending on the specific location of the leak, this may be coming from the fuel filter location or be leaking from the fuel filter itself. I would suggest having a...

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 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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...