Automatic Timing Advance Unit Replacement at your home or office.

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Automatic Timing Advance Unit Replacement Service

What is the Automatic Timing Advance Unit all about?

Gasoline and diesel engines may seem similar, and they do work on the same basic principle of combustion, but they’re very different. They require significantly different steps taken to control fuel flow throughout engine operation. Diesel fuel takes longer to combust than gasoline, and in an operating engine, combustion can take place well after the timing hits top dead center (TDC). If this occurs, then it creates lag, which has a negative impact on engine performance. To combat lag, diesel must be injected before the timing reaches TDC to provide enough time for combustion to take place. This job is handled by the automatic timing advance unit. Essentially, the unit ensures that no matter what speed the engine is operating, fuel is injected with ample time for combustion to occur before TDC is reached.

The automatic timing advance unit should be located on the fuel pump itself, and is operated by the engine's primary drive gear.

Keep in mind:

  • The automatic timing advance unit is not inspected during maintenance, and will only be checked if there is a problem with the fuel delivery.
  • The automatic timing advance unit is subject to a lot of wear and tear, particularly if you accelerate harshly, or drive frequently.

How it's done:

  • The automatic timing advance unit is verified that it needs to be replaced. The battery is then disconnected.
  • The injection pump front cover is removed and gear location aligned and marked.
  • The center bolt is removed and then the defective automatic timing advance unit is taken out.
  • The new advance unit is installed and the gears are aligned. The center bolt and cover are reinstalled. The battery is reconnected.
  • The engine is started and the automatic timing advance unit is tested to ensure proper operation.

Our recommendation:

Without an operational automatic timing advance unit, your diesel engine will not have a reliable fuel supply at all speeds, which causes serious problems. If you suspect a problem with your automatic timing advance unit or have similar symptoms, have one of our expert mechanics inspect and diagnose the problem.

What common symptoms indicate you may need to replace the Automatic Timing Advance Unit?

  • Severe engine knock
  • Sluggish engine operation
  • White smoke from exhaust
  • Significant amounts of black smoke from exhaust (more smoke is normal for a diesel)

How important is this service?

The automatic timing advance unit is crucial for safe and reliable engine operation. If the unit begins to fail, or fails completely, serious engine damage can result. If you have noticed any abnormal operations in term of sluggish performance or smoking, have the problem diagnosed immediately by one of our expert mechanics.

Fast and easy Automatic Timing Advance Unit Replacement service at your home or office.

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Recent Automatic Timing Advance Unit Replacement reviews

John

16 years of experience
179 reviews
John
16 years of experience
On time. Completed work very quickly. Changed radiator cooling fan
1999 HONDA ACCORD - COOLING/RADIATOR FAN MOTOR - ORLANDO, FL

Allen

26 years of experience
36 reviews
Allen
26 years of experience
He called the day before the repair to check in & introduce himself. He showed up on time & was very professional, courteous, & friendly. I would definitely recommend Allen!
2005 HONDA ODYSSEY - POWER STEERING PRESSURE HOSE - LAS VEGAS, NV

Zachary

13 years of experience
31 reviews
Zachary
13 years of experience
Very friendly, professional and efficient. Just a great guy, highly recommended!
2011 KIA OPTIMA - OIL CHANGE - CAPE CORAL, FL

Sebastian

6 years of experience
2 reviews
Sebastian
6 years of experience
Sebastian was awesome. He was very talkative and engaging. Super sweet!
1997 MERCEDES-BENZ E420 - OIL CHANGE - TAMPA, FL

How can we help?

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