Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

1986 Chevy 350 in a K10 pickup. Was running fine until I let…

Customer Question
1986 Chevy 350 in...

1986 Chevy 350 in a K10 pickup. Was running fine until I let off the accelerator coming up to a stop sign. It died and when it restarted it was running rough and smells gassy. Drove it home but it was very underpowered. Sounds as if exhaust is plugged but isn't. Checked plugs, wires, fuel filter. EGR valve has been deleted by previous owner. Took off distributor cap and looked at and cleaned up electrodes with sandpaper as well as the rotor. Started up and ran fine until I revved it up once and then it went back to what it was doing. Appears to be liquid spitting out of both banks through the exhaust onto my shop floor.

Mechanic's Assistant: Have you metered out the ignition system?

No, but have checked fire at all 8 plugs and I have good fire to them. Friend is bringing a timing light tonight.

Mechanic's Assistant: What is the model of your '86 Chevy?

As I said above it is a K10. 350 was a crate engine installed by a shop several years ago by previous owner.

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

Myself and I already laid out what I have tried above.

Submitted: 4 months ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 37 minutes by:
12/13/2017
Chevy Mechanic: Cesar Jimenez,
 replied 4 months ago
Cesar Jimenez
Category: Chevy
Satisfied Customers: 166
Experience: shop foreman at carmona repair
Verified

hi im cesar jimenez and i will be assiting you today. im revieiwng your question now....

Ask Your Own Chevy Question
Customer reply replied 4 months ago
ok
Chevy Mechanic: Cesar Jimenez,
 replied 4 months ago

make sure that there is no water in fuel. also check if the distributor is in timing and not loose.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
Had the cap off last night. It isn't loose. I played with the timing by turning the distributor and it doesn't matter where it is at until you get it way too far. Used to work on these old small blocks all the time. That is why I'm stumped. Will drain the gas and put some fresh in it but don't understand why it happened all at once if that is the case.
Customer reply replied 4 months ago
Also don't understand why after sanding the contacts on cap and rotor it ran fine until I revved it up. Could it be the weights/springs in the distributor for the timing advance? I didn't tear it apart that far last night. Been fighting it for 5 days now.
Chevy Mechanic: Cesar Jimenez,
 replied 4 months ago

make sure distributor is in time. take it out put it to TDC and reinstall. have seen this many times where its a tooth off.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
That will happen just by letting off the gas? It would jump a tooth? It has been running great for the year and a half I have owned it and was right up to that point..
Chevy Mechanic: Cesar Jimenez,
 replied 4 months ago

i know it might not make sense but just to scratch that off. or just put it in TDC and check that the rotor is in the right position

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 4 months ago
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,288
Experience: ASE master tech for 40 years
Verified

is your truck fuel injected or does it have a carb???

Roy

Ask Your Own Chevy Question
Customer reply replied 4 months ago
Quadrajet. Thinking stuck float, maybe?
Chevy Mechanic: Roy, import/domestic specialest replied 4 months ago

ok

makes sense.

the main issue with these carbs is this. the are 2 plugs inside the fuel bowl at the bottom and they leak fuel directly into the exhaust manifold. there are plugs from the bottom of the bowl on the outside that leak. when it does, the truck runs rich and when you let off the gas and the manifold vacuum is the highest, sucks raw fuel into the intake causing your issue.

the answer is to either rebuild the carb and use jb weld on the plugs or replace the carb. I rebuilt these carbs for years and have seen many issues with them.

Roy

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 4 months ago

are you there

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 4 months ago

do you need any other help???

Ask Your Own Chevy Question
Customer reply replied 4 months ago
Might. Did check timing as was told by first tech. It was ok. Need time to check out carb. Probably next week before I will have time.
Chevy Mechanic: Roy, import/domestic specialest replied 4 months ago

no timing at all.

ok

Please take a moment and rate my service 3 stars or better. that is the only way the site will pay me for my efforts.

Roy

Ask Your Own Chevy Question
Chevy Mechanic: Roy, import/domestic specialest replied 4 months ago

how are you making out???

Ask Your Own Chevy Question
Chevy Mechanic: Cesar Jimenez,
 replied 4 months ago

roy i do not appreciate you answering in my post.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I have not gotten back to it. Had a band concert for my daughter last night. Probably be NEXT WEEK before I can look at it again.
Chevy Mechanic: Cesar Jimenez,
 replied 4 months ago
Okay no problem just message me. Please rate me on my services happy holidays and thank you
Ask Your Own Chevy Question
Was this answer helpful?
Ask Cesar Jimenez Your Own Question
Cesar Jimenez
Cesar Jimenez
Cesar Jimenez
Category: Chevy
Satisfied Customers: 166
166 Satisfied Customers
Experience: shop foreman at carmona repair

Cesar Jimenez 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

15,289 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,357 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,866 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

2,918 satisfied customers

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

Ron Z.

Ron Z.

- Chevy Tech -

2,734 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
2009 duramax 3000, mi sits a lot, had exhaust filter that
2009 duramax 3000, mi sits a lot, had exhaust filter that would not clean ,replaced with straight pipe and tuned by mechanic.Now engine light code says turbo. I wonder if it was tuned right by mechani… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Fault msg in exhaust Urea treatment: ;P2565-OBD-11. ~78,000;
Fault msg in exhaust Urea treatment: ;P2565-OBD-11 … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
I have a indicator that is telling me to service my exhaust
I have a indicator that is telling me to service my exhaust fluid system and it's counting down to limit my speed, what can I do to stop this? … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I am just starting to hear a slight exhaust leak on my 97
I am just starting to hear a slight exhaust leak on my 97 k2500 suburban and i am thinking about changing the entire system i want to run dual exhaust with flow masters and headers but still use my o2… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
After changing the solenoid for the exhaust and manifold, My
after changing the solenoid for the exhaust and manifold, My '08 Chevy Malibu still has rough acceleration or rough idling … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
Drove till my 2012 VOLT electric charge was exhausted.
Drove till my 2012 VOLT electric charge was exhausted. Parked in garage by my home charging station but failed to plug in the charger. Three (3) days later my 12 volt battery appears to be totally dea… read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
358 satisfied customers
I have a 2010 2500hd with LMM. Exhaust lately smelling more
Hi. I have a 2010 2500hd with LMM. Exhaust lately smelling more dieselly....almost like no dpf.... … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I have a 2015 Chevrolet 2500hd. Service Exhaust Fluid system
Hello I have a 2015 Chevrolet 2500hd. Service Exhaust Fluid system is flashing, 36 miles until speed rated 65mph. I recently had a code for def heater. I replaced heater, temp switch, & def pump. I no… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
Warning light says clean exhaust filter code thrown P0101 on
Warning light says clean exhaust filter code thrown P0101 on Duramax 2008 2500HD … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I'm getting a service exhaust fluid message. 130,000,
yes, ive tried the module on top of the exhaust fluid tank … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
My 2013 Chevy equinox has a broken exhaust manifold. I
My 2013 Chevy equinox has a broken exhaust manifold. I looked on YouTube and the repair looked pretty basic so I decided to do it myself, only problem is the video I looked at is for a 2012 and mine i… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Same issue, as on this screen. 2011 duramax, service exhaust
same issue, as on this screen. 2011 duramax, service exhaust system - see owners manual. Have snap on code reader, no error codes present. 162k miles.… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Fuel coming out exhaust. Turned into a gas hog. Chevy half
they changed plugs plug wires injectors and the truck runs rough and mileage is down and holding your hand at the exhaust you can feel droplet of unburent fuel … read more
Expert
Expert
28 satisfied customers
My engine light went on yesterday The code is P0013. Exhaust
My engine light went on yesterday The code is P0013 … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Engine light on" clean exhaust filter continue to dric. Ve
engine light on " clean exhaust filter continue to dric … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
I get a bad odor like rich exhaust from the car. No exhaust
I get a bad odor like rich exhaust from the car. No exhaust leaks, no check engine light all engine data seems normal … read more
rpmdiag
rpmdiag
High school
7,513 satisfied customers
Exhaust smell with a/c on and windows closed. No it has been
we have mechanics at the factory they checked the exhaust mnaifold and a/c intake but could not pinpoint it we can take it to the dealer if needed … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Cleaning exhaust fluid message then goes into engine power
Cleaning exhaust fluid message then goes into engine power reduced. Anything I can do we are in the boonies … read more
Eric
Eric
Retired
N/A
14,436 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