2017 Toyota Corolla iM Hard Starting / Long Crank Before Start — Cost

Few things are as frustrating as turning the key or pressing the start button in your 2017 Toyota Corolla iM only to be met with an extended period of cranking before the engine finally catches. This hard starting / long crank before start issue can be intermittent, appearing when the engine is hot or cold, and often leaves drivers wondering about the underlying problem and potential repair costs. Understanding the signs, causes, and diagnostic steps can help you get your Corolla iM starting reliably again.

What drivers notice on this 2017 Toyota Corolla iM

Drivers of the 2017 Toyota Corolla iM experiencing this issue typically describe a noticeable delay between engaging the ignition and the engine actually firing up. Instead of the quick, almost instantaneous start expected from a modern vehicle, the starter motor might crank for several seconds longer than usual. This can be particularly concerning in critical situations or simply inconvenient during daily commutes.

At a glance: difficulty, repair cost, and diagnostic workflow

• Difficulty Rating: 6/10 — Easy to moderate
• Common Symptoms: Extended cranking time: The most obvious symptom, where the engine cranks for 3-5 seconds or more before starting.; Intermittent issues: The problem might not occur every time, sometimes starting normally, other times requiring a long c; Starting difficulty after sitting: More pronounced after the vehicle has been off for several hours or overnight.; Starting difficulty when hot: The engine cranks longer than usual immediately after being shut off and restarted, especi
• Estimated Repair Cost: $80–$900 (parts + typical shop labor)
• OEM Tooling Required: Standard OBD-II scanner and hand tools

Diagnostic workflow:

1. Confirm the symptom on your vehicle.
2. Scan for stored or pending codes with an OBD-II tool.
3. Inspect the most common causes in this guide (visual checks first).
4. Run verification tests before replacing parts.
5. Repair, clear codes, and verify on a test drive.

Symptoms and warning signs

Recognizing the specific symptoms associated with a hard starting or long crank condition is the first step toward diagnosis. These can vary slightly depending on the root cause but often include:

• Extended cranking time: The most obvious symptom, where the engine cranks for 3-5 seconds or more before starting.
• Intermittent issues: The problem might not occur every time, sometimes starting normally, other times requiring a long crank.
• Starting difficulty after sitting: More pronounced after the vehicle has been off for several hours or overnight.
• Starting difficulty when hot: The engine cranks longer than usual immediately after being shut off and restarted, especially after a short stop.
• Weak or slow cranking: In some cases, a long crank can be accompanied by the starter motor sounding sluggish, indicating a potential battery or starter issue.
• Engine hesitation or stumble on startup: Once the engine does start, it might briefly run rough or hesitate before settling into a smooth idle.
• Check Engine Light (CEL): While not always present, certain underlying issues (like sensor failures) can trigger a CEL.

How to verify and confirm the issue

Confirming a hard starting or long crank issue involves observing the vehicle's behavior and performing some basic checks. This helps narrow down the potential causes:

• Observe cranking duration: Pay close attention to how long the starter motor operates before the engine fires. A healthy engine typically starts within 1-2 seconds of cranking.
• Listen for the fuel pump: When you turn the ignition to the 'ON' position (before cranking), listen carefully for a brief, faint whirring sound from the rear of the vehicle. This is the fuel pump priming the system. No sound could indicate a fuel delivery problem.
• Check battery voltage: Use a multimeter to check the battery's static voltage (should be around 12.6V) and cranking voltage (should not drop below 9.6V during cranking). A weak battery can cause slow cranking and make it harder for the engine to ignite.
• Scan for diagnostic trouble codes (DTCs): Even if the Check Engine Light isn't on, a pending or historic code can provide valuable clues. A standard OBD-II scanner can be used to check the Engine Control Unit (ECU) for any stored information. While this article isn't about a specific code, a general scan is always a good diagnostic step.
• Fuel pressure test: A mechanical fuel pressure gauge connected to the fuel rail can confirm if the fuel system is maintaining adequate pressure during cranking and after the engine is shut off.
• Spark test: If you suspect an ignition issue, carefully remove a spark plug wire (or coil-on-plug) and test for spark using a spark tester or by grounding the plug (with extreme caution) while cranking. This is best left to experienced individuals due to shock hazards.

Common causes (most likely first)

The causes of a hard starting or long crank condition in your 2017 Toyota Corolla iM typically fall into three main categories: fuel, ignition, or air/compression. Here are the most common culprits:

• Weak or failing fuel pump: If the fuel pump isn't delivering sufficient pressure or volume to the engine, it will take longer for the fuel system to build up enough pressure for a successful start. A failing pump might work intermittently or struggle when hot.
• Clogged fuel filter: A restricted fuel filter reduces fuel flow, making it harder for the engine to get the necessary fuel, especially during startup.
• Faulty fuel pressure regulator: This component maintains consistent fuel pressure. If it's failing, pressure might bleed off when the engine is off, requiring a longer crank to re-pressurize the system.
• Leaking fuel injectors: If one or more injectors are leaking, fuel can drip into the cylinders, causing a rich condition that makes starting difficult. Alternatively, if they leak externally, fuel pressure drops.
• Weak battery or charging system: While often leading to a 'no crank' situation, a weak battery can also cause slow cranking, which prolongs the start time. An alternator not charging correctly will exacerbate this.
• Failing starter motor: A starter motor that is drawing too much current or is mechanically worn can crank the engine slowly, making it harder for ignition to occur quickly.
• Worn spark plugs or faulty ignition coils: Degraded spark plugs or weak ignition coils can lead to an insufficient spark, preventing efficient combustion and requiring more cranking cycles to ignite the air-fuel mixture.
• Crankshaft Position Sensor (CKP) or Camshaft Position Sensor (CMP) issues: These sensors tell the ECU when to fire the spark plugs and injectors. A faulty sensor can send incorrect signals, delaying or preventing proper engine timing for startup.
• Engine Coolant Temperature (ECT) sensor: A faulty ECT sensor can send incorrect temperature readings to the ECU, causing it to inject too much or too little fuel for the actual engine temperature, making starting difficult.
• Vacuum leaks: Unmetered air entering the engine can lean out the air-fuel mixture, making starting harder.

Related guides on this vehicle

• Car Won't Start, No Click, No Crank 2017 Toyota Rav4 Diagnosis
• 2010 Toyota Corolla Engine Won't Crank Intermittently
• Steering Wheel Shakes or Vibrates at Highway Speed 2017 Toyota Corolla

Step-by-step diagnosis and fixes

Diagnosing a hard starting issue requires a systematic approach. If you're tackling this yourself, consider consulting various repair guides for more detailed instructions specific to your vehicle.

1. Check battery and charging system:
   • Visually inspect battery terminals for corrosion and ensure they are tight.
   • Test battery voltage with a multimeter. If below 12.4V, charge or replace it.
   • Have the battery load tested at an auto parts store.
2. Inspect fuel system:
   • Listen for the fuel pump prime when the ignition is turned on.
   • Perform a fuel pressure test at the fuel rail. Compare readings to factory specifications for your 2017 Toyota Corolla iM.
   • If pressure is low, check the fuel filter for clogging. If pressure drops quickly after shutdown, suspect a leaky injector or faulty pressure regulator.
3. Verify ignition system:
   • Check spark plugs for wear, fouling, or incorrect gap. Replace if necessary.
   • Test ignition coils for proper operation, if possible. A misfire scanner can sometimes pinpoint a weak coil even if a full misfire code isn't present.
4. Scan for trouble codes:
   • Connect an OBD-II scanner and check for any stored, pending, or historic DTCs. Even if the CEL is off, codes related to sensors (CKP, CMP, ECT) could be present.
5. Check sensors:
   • If codes point to a specific sensor, test its resistance or signal output according to service manual specifications.
   • Live data from an OBD-II scanner can show sensor readings (e.g., ECT, RPM from CKP) during cranking, which can reveal faulty sensors.
6. Inspect for vacuum leaks:
   • Listen for hissing sounds around the intake manifold and vacuum lines.
   • Use a smoke machine (professional tool) or spray unlit propane/carb cleaner around vacuum lines and gaskets to detect leaks (engine RPM will change).

Repair options and cost factors

The cost to resolve a hard starting or long crank issue in your 2017 Toyota Corolla iM can vary significantly based on the root cause and whether you perform the repair yourself or hire a professional. Cost factors include:

• Parts cost: Components like spark plugs, fuel filters, and batteries are relatively inexpensive. Fuel pumps, ignition coils, and sensors can be moderately priced. A new starter motor is typically one of the more expensive parts.
• Labor cost: Professional diagnosis and repair will include labor charges, which vary by region and shop. Complex diagnostics, such as tracking down intermittent electrical issues or vacuum leaks, can increase labor time.
• DIY vs. Professional: Many simpler repairs (battery, spark plugs, fuel filter) can be done by a competent DIYer, saving on labor. More complex jobs (fuel pump replacement, sensor diagnostics requiring specialized tools) may be best left to a professional.

For example, replacing a battery might cost $150-$250, while a fuel pump replacement could range from $400-$800 or more, including parts and labor. Always consider the long-term reliability and safety of the repair when making decisions.

When to see a professional

While some diagnostic steps and repairs can be performed by DIY enthusiasts, there are specific situations where consulting a qualified professional is advisable:

• Intermittent issues: These can be challenging to diagnose without specialized tools and experience.
• No clear cause after basic checks: If you've checked the battery, fuel pump prime, and scanned for codes without finding a clear culprit.
• Required specialized tools: Fuel pressure gauges, advanced scan tools for live data analysis, or smoke machines are not commonly owned by DIYers.
• Complex electrical diagnostics: Tracing wiring faults or issues within the ECU requires expert knowledge.
• Safety concerns: Working with fuel systems or high-voltage ignition components carries risks. If you're uncomfortable, seek help.
• Time constraints: If you need your vehicle back on the road quickly and reliably.

For general information on various vehicle systems, you can also browse our collection of articles on all repair guides and specific vehicle models.

Frequently asked questions

Why does my 2017 Toyota Corolla iM start fine sometimes but not others?

Intermittent hard starting often points to components that are failing but not completely dead. This could be a fuel pump that struggles under certain conditions (like when hot), a fuel pressure regulator that occasionally bleeds off pressure, or a sensor sending erratic signals. The issue might worsen over time as the component degrades further.

Can a weak battery solely cause a long crank without a 'no start' condition?

Yes, absolutely. A battery that has enough power to engage the starter but not enough to spin the engine at the optimal speed for quick ignition can lead to a long crank. The slower cranking speed might not allow the engine to build sufficient compression or the ignition system to fire effectively, prolonging the starting process.

Is it safe to drive my 2017 Corolla iM with a long crank issue?

Driving with a long crank issue is generally not recommended, as it indicates an underlying problem that could worsen and lead to a complete no-start condition. Depending on the cause (e.g., a failing fuel pump or sensor), it could also affect engine performance, fuel economy, or even lead to stalling while driving. It's best to diagnose and repair the issue promptly.

Sources and further reading

This information is for general guidance and is not a substitute for OEM service procedures or the advice of a qualified technician. Always consult a professional for safety-critical work.

Explore related guides on ClearTheCode

• Browse OBD-II codes
• All repair guides