Symptoms of Fuel Injectors That Require Cleaning

Symptoms of Fuel Injectors That Require Cleaning and Flow Testing Service

Dirty and clogged fuel injectors will have problems like fuel leak down, abnormal spray patterns, poor fuel atomization, and / or low fuel volume.  Clogged injectors can cause the following problems:

Excessive carbon deposits and build up on the injectors, valves, and pistons.

Failed emissions with excessive exhaust pollution.  Here, replacing a failed O2sensor will not fix the problem.

Computer Error Codes.  The computer will either read a cylinder misfire code, O2 sensor code, or an air fuel mixture problem.

Starting Problems.  The engine is difficult to start hot or cold, or will not start at all.

Idling Problems.  Rough and erratic idling.

Pinging and Knocking.  Pinging due to pre ignition or worse, knocking due to detonation.  Detonation can lead to catastrophic engine damage.

Increased Fuel Consumption.  The engine may have good performance and seem to run “fine”, but it is experiencing excessive fuel consumption.

Poor performance and a Loss of Power.  The car is just not performing like it should.  The vehicle may have low or high speed hesitation and surging.

Erratic Engine Performance with poor drivability.

Leaking Fuel Injectors that do not seal completely when turned “off” can cause the following problems:

Hard Starting – Hard starting Hot or cold due to fuel leak down with loss of  fuel pressure, and little or no initial starting fuel pressure.


Idling Problems

Increased Fuel Consumption – Poor fuel economy

Exhaust Odor

Oil Thinning with gas, and cylinder bore “wash down”

Excessive Carbon and Varnish Buildup on valves and on the injector itself.

O2 Sensor Damage