2017 Ford Explorer: misfire or rough idle

Filed Oct 24, 2026 · Transmission · CO

About 3 years and 3 months after a Power Control Module reflash was done in March 2021 under the Customer Satisfaction Program (CSP) 20B27, vehicle was brought to Ford dealership on 06/07/2024 with mileage at 79,730 for multi point inspection due to vehicle runs rough and hard time accelerating. Diagnostic code was P0316. Service tech recommendation was to replace engine for $14,000.00 including parts and labor (declined recommendation). Brought vehicle to another dealership but found no codes. Instead replaced engine motor mounts, sparkplugs, and air filter due to noticeable vibrations. Dealership service tech inspected engine but found no abnormal findings. Went to another Ford dealership on 10/08/2026 to check Code P0299 that appeared on OBD test and for further inspection due to sluggish acceleration from full stop and slows down going uphill. Ford's guidance stated that torque converter failing due to mileage, acceleration/power loss from dead stop. Recommended fix was to replace the transmission for $8,461.03 (declined recommended service). On 10/23/2026, I picked up my vehicle from the dealership. During my return journey from the dealership, I encountered the same sluggish acceleration. A safety hazard that is attributed to a malfunctioning torque converter, a know problem for Ford. Consequently, Ford dispatched CSP 20B27 to assist in safeguarding the transmission converter from overheating. Regrettably, this intervention proved ineffective in mitigating the problem. Ford issued CSP 20N07 to extend warranty coverage of the automatic transmission torque converter for 12 months from RO date which in my case, RO date on CSP 20B27 was 03/19/2021. Despite the 12-month eligibility period not being met, my vehicle should have remained covered. Initially, Ford was aware of a transmission torque issue and was attempting to resolve it through CSP 20B27 and CSP 20N07. Currently, mileage is at 85K miles but I'm hesitant to drive due to safety concerns.

Filed Aug 8, 2026 · Engine · VA

Driving down the highway and checkengine light came on when I was headed to work. The vehicle lost power due to misfire with engine. I check the spark plugs and there is oil all over sparkplugs and the coil packs. This is a serious issue and needs to be addressed by ford immediately, they need to put a new engine in or pay me to get this fixed.

Filed Jun 17, 2026 · Fuel system · GA

My 2017 Ford Explorer XLT with approximately 236,000 miles has an ongoing EVAP/fuel vapor system problem that causes the vehicle to hesitate, stumble, and attempt to stall. The problem occurs most frequently after refueling and also when the fuel level is low. The check-engine light comes on repeatedly, and despite numerous repair attempts, the issue has not been corrected. Repairs and parts replaced have included the purge valve, EVAP-related sensor(s), charcoal canister(s), and associated tubing. Significant money has been spent diagnosing and repairing this condition, but the symptoms continue. After filling the fuel tank, the engine may run rough, hesitate, lose power, and attempt to stall. This creates a safety concern because the vehicle can unexpectedly lose power or stall while driving, entering traffic, slowing for intersections, or operating in other traffic situations. The condition has persisted despite replacement of multiple EVAP system components. Based on the repeated failures and inability to permanently correct the issue, I believe this may indicate a defect affecting other vehicles of the same model year. I am requesting that this issue be investigated due to the potential safety risk associated with engine hesitation, loss of power, and stalling.

Filed Jun 9, 2026 · Engine · OK

Car was running fine then went to start and received warning about car being too hot. Checked coolant and it was low. Refilled and drove home. Upon arriving engine light came on. PO301 code. There was coolant intrusion into the cylinders, leading to engine failure. Rough idle when starting. Did not drive after this. Went to start and car will not start at all. Symptoms include: Coolant loss with no visible leaks White exhaust smoke Rough idle or misfires P0300 / P0301 / P0302 codes Hydro-locked or destroyed engines

Filed Apr 19, 2026 · Engine · OH

Coolant keeps going low. No visible leaking spots. Been to 2 mechanic's. Both said Ford defective engine block. Coolant leaking into cylinder 1. Recommended engine replacement. Check engine light. Verified 300 # codes. Misfire. Foul and rough start ups. Been on 4 or 5 months.

Filed Mar 11, 2026 · Engine · GA

October 2025 check engine light came on, took to mechanic showed misfire in cylinder two and three. Replaced all plugs and coil packs, engine light went off. Engine light came back, hard start on November 26,2025 showed misfire in cylinder 2 and 3. Replaced those coil packs again, engine light off. February 2, 2026 engine light back on, hard start with vibration. Took vehicle to Mtn View Ford in Chattanooga to have diagnostic test done. Received call on February 9,2026 that the engine was in complete failure, coolant leaked into the cylinders, would require a $12,000 new engine at 84,328.6 miles on the vehicle. The vehicle had not been driven more than 50 miles per week in the past two years, had on time maintenance.

Filed Feb 22, 2025 · Engine · MO

Check engine light came on while driving on highway. I had a OBD reader with me and plugged it in. Came back with a cylinder misfire. Took it to a local mechanic to get new plugs and coils. Mechanic cleared the code but the light came back on. I took it to another mechanic that I trust who found coolant in the oil due to cracked heads. Mechanic gave me information about this 3.5l motor being known to have this problem to take back to dealer. 3 months of waiting and having to argue that despite being out of warranty, they knew this motor was bad and should replace it. Ford finally put a new motor in. Drove for 6 more months and just had the check engine light come back. Cylinder misfire again. They shouldn't be allowed to sell this motor knowing that it can leave people stranded. This is criminal. Will never buy a Ford again. They KNOW this motor is trash but keep letting unsuspecting consumers foot the bill be cause they assume it's a one off. Shame!

Filed Jan 20, 2025 · Engine · NJ

Car was misfiring, oil in the spark plugs. Took it to our mechanic and basically told us we need a new engine. The car in a 2017 with 143,000 miles. There was coolant in cylinder 1 of the engine. Mechanic said cylinder walls are not properly sealed causing the head gasket to fail repeatedly even after replacement.

Filed Sep 17, 2024 · Engine · 94,000 miles · AL

The contact owns a 2017 Ford Explorer. The contact stated while driving at an undisclosed speed, the vehicle jerked violently. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who retrieved DTC code: P0300; and determined that there was an engine misfire. The contact's husband replaced the coil pack and spark plugs; however, the failure persisted. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 94,000.

Filed Jul 19, 2024 · Engine · MA

2017 Ford Explorer 2.3L Ecoboost with 77,000 miles. Check engine light came on and I scanned the car for a cylinder 3 misfire. Changed all spark plugs and coil packs. Cleared the code and Cylinder 3 misfire is showing again. Overheating while idle. Car appears to be gulping down coolant with no sign of leaks.

Filed Jul 1, 2024 · Acceleration, Transmission · 98,000 miles · AZ

The contact owns a 2017 Ford Explorer. The contact stated that the vehicle was experiencing rough idling while in drive(D) and reverse(R). Additionally, the contact stated that while driving from a complete stop and depressing the accelerator pedal, the vehicle hesitated while responding. The contact stated that upon depressing the accelerator pedal closer to the floorboard, the vehicle responded as needed. There was no warning light illuminated. The vehicle was taken to an independent mechanic, where it was determined that the failure was related to Ford Campaign Number: 20N07. The dealer was contacted and informed the contact that the vehicle was not covered under the Campaign. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 98,000.

Filed Mar 30, 2024 · Engine, Transmission · NY

I have replaced all the starter coil packs in my engine and still have the same problem the codes read misfiring on multiple cylinders wich causes the car to lose power and pull back on the transmission while pushing on the gas pedal this is an ongoing problem