Q: No spark on cyclinder 1 and 5
Truck runs in park but has no spark on cyclinder 1 or 5 new plugs and wires could it be pcm
My car has 200000 miles.
My car has an automatic transmission.
PCM’s rarely fail excepting cases where there is a whole model year, or production run, where a known issue arose in the field (e.g., bad capacitors being one example in certain Toyotas but even that was a long time ago). If you have a distributorless ignition system, the individual coil packs for those cylinders have to be tested as well as a variety of sensors that are in the control circuit. If it is actively misfiring on 1 and 5 try not to run the engine too much until it is repaired, because you could damage the catalytic converter as unburned fuel will enter the converter.
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
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
What others are asking
Immobilizer keeping car from starting.
Your car may need the service harness and relay installed into the wiring of your ignition switch; the tech bulletin is RJT 1678, to get the parts list and directions. This part is a fix to a few different problems...
ABS and Brake lights come on while I'm driving
This could be an issue in the ABS control unit. Faults need to read out in order to determine if the problem lies in the ABS unit or if it is a sensor or valve issue. You may need to...
No Crank No Start, dashboard lightup with No Bus warning
Considering the problems at hand it may be best for an in person diagnosis of the situation. The problem could be as simple as a failed sensor or broken wire, or the power-train control module itself going faulty. Considering the...
high rpm when starting car, then idles very rough. Also lack of power accelerating at times while driving
These codes all point to the operation of the throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement). The throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement) is a sensor used to monitor the throttle position relative to your foot on the gas pedal. The sensor is usually located...
Having problems with transmission cooler connectors leaking with a new radiator.
The new radiator most likely did not come with new quick connectors for the transmission cooler lines going into the radiator. You had to remove the old ones from the bad radiator and transfer them into the new radiator. The...
master cylinder is bad, but does it make a noise going down the road. if so what kind. mine is intermittent
Hello, thank you for writing in. The master cylinder may make some noises, however it is rather unlikely that you are going to hear these fluid sounding noises over the engine noise. Start by adding the differential fluid and take...
How much does it cost to replace a sunroof motor on a 1997 Toyota 4Runner
Hi there - unfortunately, this is not a service YourMechanic offers at this time. Thanks for thinking of us though!
2014 Chrysler Town
Hi Heather. ETC pertains to the electronic throttle control system. It is possible that a fault exists in the ETC system and so the first thing to do is check for stored diagnostic trouble codes. The only "ACC" light we...
vibration and shaking at idle. also very loud and noisy engine. replaced all motor mounts, spark plug components, and intake syste
Often noise is related to exhaust system leaks or internal failures in the exhaust such as loose baffles in the muffler. To rule out accessory drives and pulleys as a source of noise what you can do is momentarily run...
Related articles
The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have evaluated...
The Best Used Cars to Buy If You Love Road Trips
If If you love to travel, comfort is very important in a vehicle. You want a nice, quiet ride, comfortable seating, and enough room. We have evaluated several used vehicles, and narrowed our favorite road trip vehicles down to the...
The Best Used Cars to Buy If You're a General Contractor
If If you're a general contractor, you probably aren’t in the market for a used car. More likely, you’re looking for a pickup truck, because you need to haul equipment and supplies to various job sites. Most contractors will likely...
Browse other content
Maintenance
Estimates
Services