Honda

Have Honda Questions? Ask a Honda Repair Expert.

Ask an Expert,
Get an Answer ASAP!

Honda

I have a 1990 Honda Pacific Coast. It runs fine except:

Customer Question
after about thirty minutes of...
I have a 1990 Honda Pacific Coast. It runs fine except: after about thirty minutes of driving the idle RPM goes from normal(###) ###-####to 3000 Plus. Therefore, when you release the throttle in this condition (when it has been run for over a half hour) it backfires. The local mechanic can't figure it out. Help.-Jon Reiver
Submitted: 1 year ago.Category: Honda
Show More
Show Less
Ask Your Own Honda Question
Answered in 3 minutes by:
7/18/2016
Mechanic for Honda: rpmdiag, Tech and Instructor replied 1 year ago
rpmdiag
rpmdiag, Tech and Instructor
Category: Honda
Satisfied Customers: 8,231
Experience: Since 1975
Verified

Hi, I’m Ron and I’ll be helping you today.
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

The best thing to do in a case like this is scan the computer for codes and related data. The idle air control motor on the throttle body may be the problem. You can take it off and clean the carbon out of it and also clean the throttle body to and see if that helps.

Thanks, Ron

Ask Your Own Honda Question
Customer reply replied 1 year ago
Ron, it is a 1990 and I don't think it has a computer that can be scanned. I might be wrong. IT always idles correctly when cold. Any thoughts?
Mechanic for Honda: rpmdiag, Tech and Instructor replied 1 year ago

Yes, it should give data with the proper tool and software. God only knows how much that costs:)

Try putting on a coolant temp sensor. These can be real brats if their out of calibration too hot or too cold reading. If you have a lab scope, that's even better than the scan tool. See attachment.

Thanks again, and please don't forget to rate me and keep this link in case you need me again later on. Ron

ace5a2b8-c312-451f-a863-...jpgace5a2b...jpgf0c4c757-66af-4a15-9a23-...jpgf0c4c75...jpg2a6a95ab-e276-47b6-a97a-...jpg2a6a95a...jpg
Ask Your Own Honda Question
Ask rpmdiag Your Own Question
rpmdiag
rpmdiag
rpmdiag, Tech and Instructor
Category: Honda
Satisfied Customers: 8,231
8,231 Satisfied Customers
Experience: Since 1975

rpmdiag 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:

Thank you very much for saving my daughter and her family a lot of money on her Honda. You are definitely on my list for future help. Thanks, again.

FredUSA

I just heard from my mechanic. You were right...a $45.00 job. THANK YOU!! Your response was received in less than 10 minutes!!

Linda B.USA

Your answers were clear and the diagrams were perfect. Dealer wanted $87 for an hour of labor and even I did it in 15 minutes.

EdUSA

HONDA PLATINUM was great. I really appreciate his help. I was ready to trade my new Honda until he told me to wait until I got 3,000 miles on it and my gas mileage would get much better.

SummerUSA

I took the Power Steering O-Ring service bulletin linked from JustAnswer to my Acura dealer, and not only did they no-charge the o-ring, they also replaced the power steering pump at no cost.

Gary RStevenson Ranch, CA

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

< Previous | Next >

Meet the Experts:

Kyle N.

Kyle N.

Honda Master Tech

3,635 satisfied customers

Honda Dealer Tech, ASE Master Auto Tech

John G.

John G.

Honda Technician

2,643 satisfied customers

Dealership tech since 1982. ASE and Honda Master Technician.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

511 satisfied customers

16 years of experience

Marty

Marty

Bosch Master Tech

123 satisfied customers

Bosch Certified Master Technician

Amedee

Amedee

Former ASE Master Technician

1,391 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Ron

Ron

ASE Certified Technician

381 satisfied customers

ASE Certified Tech 34 years.

thebesthonda

thebesthonda

ASE MasterTechnician

2,299 satisfied customers

26 years experience

< Previous | Next >

Related Honda Questions
The windows do not operate on 2006 honda ridgeline. I have
Second opinion] the windows do not operate on 2006 honda ridgeline. I have replaced the master switch but did not help. I jumper out the black and white/green wire and got power back on the fuses to t… read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
908 satisfied customers
2007 Honda Odyssey power window problems.
2007 odyssey has common window problem.....driver's window operates fine but passenger and rear windows only click when the button on driver's door is depressed. Checked fuses and they are fine. Any s… read more
Kyle N.
Kyle N.
Honda Master Tech
Vocational, Technical or Trade Scho
3,635 satisfied customers
Curtis, I have a 2006 Honda accord lx 2.4 (4 cyl.) It has a
Curtis, I have a 2006 Honda accord lx 2.4 (4 cyl.) It has a timing chain. It stopped running this morning. The auto shop across the street says a piston came up hit and bent a valve. I used to be a Ho… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
I have a Honda generator EU 3000is. I would like to know how
I have a Honda generator EU 3000is. I would like to know how I would charge the battery for the starter that is included with this unit… read more
lorunner
lorunner
A tech
High School or GED
1,068 satisfied customers
Clutch on ac will not engage (2011 honda civic) I DON'T
it just started this afternoon, I am on vacation in Macon GA … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,931 satisfied customers
Cigarette lighter does not work. I cannot find any fuses for
Cigarette lighter does not work. I cannot find any fuses for the lighter 1992 Honda Accord … read more
Marty
Marty
Bosch Master Tech
Associate Degree
123 satisfied customers
Starter turns one time and then stops. It is not enough to
Starter turns one time and then stops. It is not enough to start engine. … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
381 satisfied customers
2008 Honda Civic. It is very hard to get the key into the
2008 Honda Civic. It is very hard to get the key into the ignition switch. Have to fiddle with the key … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
My honda is not able to drive when i put it in any gear it
My honda is not able to drive when i put it in any gear it dosnt move the rpms rev up but it dont accelerate … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,931 satisfied customers
Just had new tires put on my 2013 Honda Civic, however the
Just had new tires put on my 2013 Honda Civic, however the "VSA Off" indicator now is on and stays on. Pressing the "VSA Off" switch does nothing. … read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
1994 honda accord, new relay and fuel pump starts runs a
1994 honda accord, new relay and fuel pump starts runs a while sometimes a few seconds the relay starts to chatter then dies … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I just got my 2007 honda accord battery replaced. Everything
Hi i just got my 2007 honda accord battery replaced … read more
Mechanic01
Mechanic01
1,151 satisfied customers
Trouble code 61-01 and 83-19 what dose these mean. Dont know
dont know what exact code are but i have tried to reset … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,931 satisfied customers
What causes the km/litre gauge have unusual readings ie. The
what causes the km/litre gauge have unusual readings ie … read more
Pascal Flemming
Pascal Flemming
ASE Certified Auto Technician
Vocational, Technical or Trade School
11 satisfied customers
I have a 2008 Honda oddessey 3.5. Is there any difference in
I have a 2008 Honda oddessey 3.5 . Is there any difference in a 2002 oddessey and a 2008 odessey when doing the timing belt ? I've done a 2002 before… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
2006 Honda pilot overheats and fan runs when I turn off.
2006 Honda pilot overheats and fan runs when I turn off … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
We have a1998 Honda Accord with lots of miles. It has lost
We have a1998 Honda Accord with lots of miles. It has lost its air conditioning , heating and cruise control. Is it probably an electrical problem? With three big problems is it probably all related? … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
3,931 satisfied customers
Changed battery, radio needs reset, no code at time of
changed battery, radio needs reset, no code at time of purchase :( … read more
Amedee
Amedee
Former ASE Master Technician
Vocational, Technical or Trade Scho
1,391 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