Automatic Timing Advance Unit Replacement at your home or office.

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Logo-yelp
CUSTOMERS LOVE US ON YELP
4.5 out of 5 (550 reviews)
Icon-warranty_badge-02
SERVICES BACKED BY OUR
12-Month, 12,000 Miles Warranty
How does YourMechanic work?    
Icon-quote-hiw
Get a quote

Choose from 600+ repair, maintenance, and diagnostic services, backed by our 12-month, 12,000-mile warranty.

Icon-calendar-hiw
Book an appointment

Tell us when to meet you at your home or office. We’ll send one of our vetted, top-rated mechanics.

Icon-fixed-hiw
Get your car fixed

Continue with your day while our mechanic fixes your car onsite. You pay only after the job is done.

How much does Automatic Timing Advance Unit Replacement cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
ServiceYourMechanic PriceShop/Dealer Price
Show example Automatic Timing Advance Unit Replacement prices

Automatic Timing Advance Unit Replacement Service & Cost

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.

GET A QUOTE FOR YOUR CAR
Backed by 12-month, 12,000-mile guarantee

Meet some of our expert mechanics

Real customer reviews from owners like you.

129 reviews
David
23 years of experience
I give him 5 stars. Great service on the weekend. The problem with my car was diagnosed quickly and resolved. I can only recommend him.
2004 CHEVROLET TRAILBLAZER - CAR IS NOT STARTING INSPECTION
Want David's expert advice? Ask your question now. Its free!
109 reviews
Jonathan
12 years of experience
Jon was excellent, very professional.
2007 VOLKSWAGEN TOUAREG - 50 POINT INSPECTION
Want Jonathan's expert advice? Ask your question now. Its free!
21 reviews
Nelson
21 years of experience
Arrived on time and ready for action. Was able to find the problem quickly and provided realistic estimates of repair costs. Professional and courteous.
2002 LEXUS RX300 - CAR IS NOT STARTING INSPECTION
Want Nelson's expert advice? Ask your question now. Its free!
15 reviews
Napoleon
22 years of experience
Napoleon was a great help and we look forward to working with him in the future.
2001 VOLKSWAGEN CABRIO - CHECK ENGINE LIGHT IS ON INSPECTION
Want Napoleon's expert advice? Ask your question now. Its free!
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
ServiceYourMechanic PriceShop/Dealer Price
Show example Automatic Timing Advance Unit Replacement prices

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com