
Signs You Need This Service
- Engine misfiring or running rough
- Check engine light on (often misfire codes)
- Poor acceleration and fuel economy
- Engine stalling or hesitating
- Strong fuel smell from exhaust

What a failing ignition coil causes
A bad ignition coil causes a misfire on the one cylinder it fires, which usually shows up as a rough idle, a shudder under load, and a check engine light with a specific cylinder misfire code. A coil can fail gradually or fail outright.
Once the coil is replaced and the fix is confirmed with a scan, the engine should run smooth again right away and the misfire code should clear for good. If more than one coil tests bad, we'll show you before recommending replacing more than the one.
Coils tend to fail one at a time rather than all at once, which is why a single-cylinder misfire is the most common way this problem shows up rather than the whole engine running rough.
Is a coil replacement the right fix
This fits a vehicle with a confirmed one or two cylinder misfire code, or a coil that's visibly cracked or arcing. It's not the likely fix if every cylinder misfires evenly, since that points more toward spark plugs or a fuel delivery issue rather than a single failing coil.
Included: the coil for the affected cylinder and a scan afterward to confirm the code clears. Not included: replacing every coil on the engine unless testing actually shows more than one has failed. Time on site is usually well under an hour per coil once the cylinder is identified.
Backyard Mobile Repair tests each coil individually rather than replacing on a guess, part of why the shop holds a 4.9 rating from more than 50 Google reviews across the St Paul area and beyond.
The mobile visit for ignition coil replacement in St Paul
We bring the coil for your engine along with a scan tool, so most calls are a single visit. You just need a parking spot with room to open the hood, a driveway, an apartment lot, an office lot, or roadside once you're pulled over safely.
Cold, damp weather makes a weak coil arc and misfire worse, and that's when most of our coil calls come in. A misfire you've noticed in the fall is worth checking before a Minnesota winter makes it worse on a daily commute through St Paul.
How It Works
Three simple steps from broken down to back on the road.
Call or Text
Tell us what's going on with your vehicle and where it's located.
We Come to You
Our mobile mechanic arrives at your home, work, or roadside with the right tools and parts.
Fixed On Site
We diagnose, repair, and get you back on the road. No tow, no shop visit.
Why Choose Backyard Mobile Repair?
- We come to your location, no tow truck needed
- Fast response times across St Paul and surrounding areas
- Honest, transparent pricing
- Same-day service available
- Veteran-owned and operated with integrity in every job
4.9 Stars on Google
See what our customers say →
Areas We Serve
We bring mobile mechanic service to your home, work, or parking lot across the greater St Paul metro.
We bring this service to driveways and parking lots across the east metro.
View all service areasQuestions about Ignition Coil Replacement
Also need help with Spark Plug Replacement or Diagnostic Services? We handle that too.
Home · All Services · About Us · St Paul Service Area · Call (651) 888-9595 · Google Reviews ★ 4.9
