2160 West River Dr | 3636 Eastern Ave | Mon–Fri 7:30a–5:00p
WEST RIVER 563-323-5554 EASTERN 563-322-8354
CALL NOW · 563-323-5554
Vehicle electrical and fuel-system diagnostics on the engine bay at Jack's Brake & Alignment Eastern Avenue
Home / Services / Electrical & Fuel

Electrical & fuel systems in Davenport, IA

No-start, dead battery, rough idle, poor MPG — we chase the actual fault with factory scan tools, not the parts-store guessing game.

WARNING SIGNS
Factory scan tools
Domestic, Asian, European, diesel
Free estimate
With some services — check with store for details.
24 / 24 warranty
Parts & labor, nationwide TechNet
Warning signs

Time to come in?

Electrical and fuel systems overlap — a bad ground looks like a fuel problem, a weak fuel pump looks like a spark problem. Here's what to watch for:

No-start or slow crank

Battery, starter, alternator, or a parasitic draw. We load-test all three before we sell you anything.

Battery keeps dying

Something is drawing current with the key off. We measure amp draw and hunt down the offending circuit.

Rough idle

Injectors, coils, plugs, vacuum leaks — the list is long. Factory scanners tell us which cylinder is misfiring in seconds.

Poor gas mileage

Failing O2 sensor, dirty injectors, or a stuck thermostat — every 2 MPG you lose is money on the road.

Dim or flickering lights

Alternator output low, corroded grounds, or a failing regulator. Left alone it takes the battery with it.

Fuel smell or leak

Cracked line, failing injector seal, or a bad EVAP part. Safety issue — do not drive it, we'll come get it.

What we do

Diagnose first, fix second

Electrical and fuel gremlins are where cheap shops throw parts at the problem. We test what's actually failed with factory scanners and load testers — then quote the fix that actually solves it.

Battery testing & replacement
Alternator & starter
Parasitic-draw diagnosis
Wiring & ground repair
Fuel pumps & injectors
Fuel filters & lines
O2 & MAF sensors
Ignition coils & plugs
GET IT DIAGNOSED
Why factory scanners matter

Not the parts-store reader

Generic OBD readers pull a P-code and stop there. Our factory scanners see module data, sensor live values, and manufacturer-specific codes — so we find the actual cause instead of replacing the sensor that reported it.

Book a Scan

Diagnose it right the first time

Free estimate at either shop — with some services, check with store for details. Written quote. No parts thrown at the problem.

WEST RIVER · 563-323-5554 EASTERN · 563-322-8354