100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
ASE L1 engine performance Exam Study Questions and Answers $13.49   Add to cart

Exam (elaborations)

ASE L1 engine performance Exam Study Questions and Answers

 1 view  0 purchase
  • Course
  • ASE
  • Institution
  • ASE

ASE L1 engine performance Exam Study Questions and Answers Air fuel ratio (Very rich) 10.1 at all speeds ———- Idle Off idle Cruise HC 250ppm 275ppm 300ppm CO 3%. 3%. 3% CO2 7 to 9 all down O2 .2% all down What can the possible cause be ? A. Leaking injector ©GRACEAMELIA 2024/2025 A...

[Show more]

Preview 4 out of 61  pages

  • October 23, 2024
  • 61
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ASE
  • ASE
avatar-seller
GraceAmelia
©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




ASE L1 engine performance Exam Study
Questions and Answers

Air fuel ratio (Very rich) 10.1 at all speeds




———- Idle Off idle Cruise


HC 250ppm 275ppm 300ppm


CO 3%. 3%. 3%


CO2 7 to 9 all down


O2 .2% all down




What can the possible cause be ?




A. Leaking injector


Page 1/61

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




B. High Map sensor voltage (low pressure reading) (vacuum leak)


C. Stuck open thermostat


D. All the above - Ans:✔✔-D


Air fuel ratio (Rich) 10.1 to 12.1 at low speed




————Idle —-Off idle —-Cruise


HC —-150ppm —150ppm ——-100ppm


CO ——-1.5%. ———1.5%. ———-1.5%


CO2— 7 to 9% —7 to 9% ——11 to 13%


O2 —- .5% ——-.5% ———- 1.0




High Map sensor (vacuum leak)


Leak injectors


Engine oil diluted with gasoline




Page 2/61

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Excessive crankcase blowby


Stuck open thermostat


And....


What else can cause this condition?


A. Low fuel pressure


B. Bad camshaft


C. High fuel pressure


D. All the above - Ans:✔✔-C


Air fuel ratio very lean above 16.1 at all speeds




————Idle —-Off idle —-Cruise


HC —-200ppm —205ppm ——-250ppm


CO ——-.5%. ———.5%. ———-1.0%


CO2— 7 to 9% —7 to 9% ——7 to 9%




Page 3/61

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




O2 —- 4-5% ——-4-5% ———- 4-5%




Intermittent ignition problems (misfire)


Restricted fuel injector


Low fuel pressure


Vacuum leak


Improper timing


And..


What else could cause this concern?




A. Stuck open thermostat


B. Stuck close thermostat


C. Both b and d


D. Low cylinder compression - Ans:✔✔-C
Page 4/61

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller GraceAmelia. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $13.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

82013 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$13.49
  • (0)
  Add to cart