How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Hammer Time Your Own Question

Hammer Time
Hammer Time, L1 Master Technician
Category: Car
Satisfied Customers: 4942
Experience:  ASE Mastertech with Adv level Engine performance cert.
201885
Type Your Car Question Here...
Hammer Time is online now
A new question is answered every 9 seconds

1986 olds cutlass 307(y) auto to set timing the book says ...

Resolved Question:

1986 olds cutlass 307(y) auto to set timing the book says to jumper pins A & B on diagnostic plug. on the lable decal on the fan shroud it says to ground the C-3 diagnostic lead. i can't find the C-3 lead. please help. thanks, john

Optional Information:
1986 Oldsmobile cutlass 307

Already Tried:
nothing





Submitted: 8 years ago.
Category: Car
Expert:  Hammer Time replied 8 years ago.

Set timing at low idle and Before Top Dead Center, unless otherwise specified. Disconnect and plug distributor vacuum line, as equipped, at distributor.

1982-86 1.8L (112) FI, 2.5L (151), 4.3L (260), 5.0L (307) engines, ground diagnostic connector.

1982-86 2.0L (122) FI, 2.8L (173) FI, disconnect EST bypass connector (single connector, tan/black wire).

1981-90 all others W/carburetor, disconnect 4-wire connector at distributor.

Timing MUST be set to specifications on emission label, if different from setting listed. If "Check Engine" light comes on during procedure, remove ECM fuse to clear.

According to these instructions, your vehiclle uses the "jump A and B" method.











Customer: replied 8 years ago.
Reply to Hammer Time's Post: don't know if last post went thru. 1986 5.0L VIN Y
for timing the manual calls for jumpering pins A&B on diagnostic connector (ALDL)it also states that due to late changes, always refer to Engine tune-up Decal in engine compartment before performing tune-up. " if manual and decal differ, use decal specifications." the decal states to;
1. disconnect thermac hose and plug it.
2. start engine and ground C-3 diagnostic lead.
3. set timing at spec. RPM in park. remove ground from C-3 diagnostic lead.
i can't find anywhere that states that the C-3 lead is the same as the A&B pins of the ALDL
Expert:  Hammer Time replied 8 years ago.
There really seems to be some confusion with this proceedure. The connecter your looking for is a light brown single wire with a connecter to separate it. On some vehicles, it's behind the gloce box, on some others it's sticking out of one of the harnesses along the firewall. Since the instructions are saying it doesn't use one, it obviously doesn't tell me where it is.
Customer: replied 8 years ago.
Relist: I still need help.
1986 olds 5.0L 307
the manual states the following;
1.on the 5.0L VIN (_F_)
put EST into by-pass mode by unplugging "set timing" timing connector. Connector is a Tan/Black wire in the harness near the distributer. Set timing and reconnect "set timing" connector.
2. on the 5.0L VIN (_G&H_)
Unplug 4-wire connector at distributor. Set timing and plug in 4-wire connector.
3. on the 5.0L VIN (_Y_) which is mine. the tune-up decal on my vehicle states to ground C-3 diagnostic lead. Set timing then remove ground from C-3 diagnostic lead.
perhaps this info will help you help me in locating this C-3 lead. thanks again .john
Expert:  Hammer Time replied 8 years ago.
I have spoken to a GM dealer tech and he informs me that you can use the A B method at the diiagnostic connecter and that will work also. You don't need to find that connecter.
Hammer Time, L1 Master Technician
Category: Car
Satisfied Customers: 4942
Experience: ASE Mastertech with Adv level Engine performance cert.
Hammer Time and 2 other Car Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician
 
 
 
Chat Now With An Auto Mechanic
Hammer Time
Hammer Time
Auto Mechanic
4942 Satisfied Customers
ASE Mastertech with Adv level Engine performance cert.