Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

1993 chev p/u with a 305. total timing at 2500 rpm is only…

1993 chev p/u with...

1993 chev p/u with a 305 . total timing at 2500 rpm is only 8*. at idle with the base timing wire unplugged is 0* set to mfg specs. shouldn't the total be more like 28*

Mechanic's Assistant: How many miles are on the car? Have you noticed any change in your gas mileage lately?

There is 100693 kms on vehicle , yes fuel milage isn't great

Mechanic's Assistant: What is the model of your '93 Chevy?

Silverado

Mechanic's Assistant: Are you fixing your Silverado yourself? What have you tried so far?

I have just rebuilt the truck and everything is new, motor has had head gaskets replaced , other than that just wires,plugs

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Just wondering if the total timing should be more, and what changes the total timing on that vehicle.

Show More
Show Less
Ask Your Own Chevy Question
Answered in 5 hours by:
3/24/2018
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,898
Experience: ASE master tech for 40 years
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

Ask Your Own Chevy Question

ok

you have an electronic spark control module that controls the timing. it looks at input from the knock sensor and will send a retard signal to the distributor through the ecm. it will only retard the timing, not advance it.

there should be a set of weights in the distributor that work on a centrifical control that advance the timing. if the springs are broken they will not work.

Roy

Ask Your Own Chevy Question
Customer reply replied 4 months ago
Ok Roy, thanks, ***** ***** check that in the morning and get back to you. what should the total advance be? When I checked the timing it was at 0*, as required, with the base timing wire disconnected. but when I reconnected the wire it was still at 0*, shouldn't the timing be slightly advanced when that wire is connected?

when you reconnect the wire, you need to turn it off and re start to read the timing again. it will not advance right away when reconnecting.

the total advance should be around 25-30 degrees.

Roy

Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,898
Experience: ASE master tech for 40 years
Verified
Roy and 87 other Chevy Specialists are ready to help you
Ask your own question now

thank you

Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Roy Your Own Question
Roy
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,898
7,898 Satisfied Customers
Experience: ASE master tech for 40 years

Roy is online now

A new question is answered every 9 seconds

How JustAnswer works:

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

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 was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,642 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,953 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,836 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
1977 chev silverado auto 350 cu in----will not start unless
1977 chev silverado auto 350 cu in----will not start unless gear shift is pulled backwards w/shift in park (alway up and slightly pulled back). Is this a symptom of adjustment or is it a bad neutral s… read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,058 satisfied customers
Chevrolet Tahoe 4x2: I have both a 2001 Chevy Tahoe with the
I have both a 2001 Chevy Tahoe with the 3.5 liter and a 2002 Silverado 2500 with the 8.1 liter engines. I am wondering about the lifter tapping at startup in the mornings when it is cold. It is a bit … read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
Need some heqlp on a quadrajet carb 1986 chev p/u took off
Need some heqlp on a quadrajet carb 1986 chev p/u took off a elderbrock , putting on a reman quadrpajet with a elecltric chock , got everything hooked up but when I step on pedal chock does not open ?… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
Chevrolet C-1500: I have a 96 Chev P/U w/305 eng. I replaced
I have a 96 Chev P/U w/305 eng. I replaced the starter and positive cable. The vehicle still will not start. When key is turned to start position, there is nothing. I have lights, horn, radio, fan, ev… read more
jazzmaster
jazzmaster
LEAD AUTO TECH
Vocational, Technical or Trade Scho
1,124 satisfied customers
Chev..4th .If i unplug TPS it shifts into all gears and 4th gear stays
I have a chev 2500 4x4 1993 with 4l80E . It drops out 4th gear and will not go back into 4th .If i unplug TPS it shifts into all gears and 4th gear stays in. also i had it scand . set no code .even wi… read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 satisfied customers
2002 Silverado 2500 HD: many zirk fittings..6.6 Duramax..Turbo Diesel
How many zirk fittings on my 2002 Silverado 2500 HD w/ 6.6 Duramax Turbo Diesel? I think my mechanic is missing some. Thanks… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
1993 Chevy Silverado 2500: a 350 V8 engine..buddy..cap..degrees..KM
I have a 1993 Chevy Silverado 2500 with a 350 V8 engine. Just picked this truck up from a buddy of mine. When I got it the dirstibutor cap was loose. When my father in law used his " Timing Light " it… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
my 1993 chev z71 stepsidewith a 4 inch lift, 5.7L engine..33inch tires
Lou P. you sent me an e-mail stating that my 1993 chev z71 stepside with a 4 inch lift, 5.7L engine, 33inch tires was worth $2500- 5000,JUST NEED u to state this again… read more
Lou P. master tech
Lou P. master tech
Mercedes Benz master tech
Bachelor's Degree
649 satisfied customers
Silverado 2500: 6.6 Duramax..Allison..the fuel filter need..changing
I have an 08 Silverado 2500 with 6.6 Duramax/Allison. How often does the fuel filter need changing, the monitor says it still has 58% of its life left. Do I let it go or is there any maintenance that … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,756 satisfied customers
Volt meter..pin..the negative battery cable and plug it..awhile
I have a 2005 silverado the volt meter is going from 14 to 12 and not coming back up. I can unplug the 10 pin plug that is located on the negative battery cable and plug it back in and the problem wil… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
1,323 satisfied customers
2002 chevy silverado 1500 hd: rebuild..transfer case..electronic..cab
I recently completely a rebuild of a Katrina flood vehicle. Its a 2002 Chev Silverado 1500HD 4 dr CrewCab P/U. I replaced the the engine, transmission, transfer case and probably just about every elec… read more
Dr Chevy
Dr Chevy
Shop Foreman
Vocational, Technical or Trade Scho
324 satisfied customers
Silverado 2500: blower..scanned..I disconnected battery cables..alarm
O4 Silverado 2500 4X4 my ABS light, P/B Light both came on, the screen says to service 4X4, and the A/C blower stopped working at the same time. I scanned but, there is not a code in any mode. I disco… read more
Jim B
Jim B
AAA Approved Shop Owner
High School or GED
1,147 satisfied customers
Glow Plug light will not come..truck started..1993 chev pu 2500 Diesel
Glow Plug light will not come so that I can get the truck started, what do I need to do ? 1993 Chev PU 2500 Diesel… read more
Carfix4you
Carfix4you
Lead Technician
Associate Degree
412 satisfied customers
305 ltd: reading haynes book specs for setting timing..set timing
i was reading haynes book spec's for setting timing for a chevy rs camaro 1991 with 305 ltr. book stated to set timing at 10*tdc… read more
Dennis
Dennis
Owner, Manager
Vocational, Technical or Trade Scho
104 satisfied customers
Pickup: My speedometer is not working and some time..chev..silverado
My speedometer is not working and some time it will work is there a speedometer cable on a 2004 chev pickup silverado… read more
Greg A.
Greg A.
Bachelor\u0027s Degree
37 satisfied customers
89 chevy: cab..the power door locks work on the pass..drivers side
i have an 89 chev silverado p/u standard cab. the power door locks work on the pass. side but not the drivers side. i replaced the drivers side actuator but it still doesnt work. help thnx ray… read more
Bob
Bob
Vocational, Technical or Trade Scho
2,784 satisfied customers
2004 chevy: the speed odometer keeps going..speed sensor..replacing
on my 2004 chevy silverado the speed odometer keeps going back and forth from 0-120mphr i have replaced speed sensor,worked for couple of days then stopped working again.is there something else i coul… read more
Greg A.
Greg A.
Bachelor\u0027s Degree
37 satisfied customers
1993 chevy silverado 1500: wheel drive..camaro..the tranny..000 miles
ok so my dad totalled his 1993 chevy silverado 1500XXXXXit has a 350 engine and i believe a 700r4 tranny. i have a 1992 camaro rs with a 305 and 700r4 tranny. the tranny on my camaro just went out at … read more
William
William
Vocational, Technical or Trade Scho
194 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x