Question about 1985 Honda Prelude

1 Answer

Thermovalve (fast idle) in 1986 Honda EX 12V carbu engine

I experience a failure of white thermovalve, the one that is on driver's side of air intake manifold (bearing the carb).
Could it be repaired or how can I replace it (may be get rid of it!).
It is a 3way valve receiving hoses 16, 17, 18.
I could not get the source of those devices !!
Thks a lot,

Posted by on

  • daniel_azzis Feb 06, 2009

    I could buy a new thermovalve and that nearly solved all problems...

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Those thermo valves can't be fixed. It sounds like your describing thermo valve A. The one right next to it is thermo valve B, (It's blue) Thermo valve B can be bought new from most good parts houses. I haven't been able to find a new thermo valve A so you may have to go to a junk yard with a hand vacuum pump and find a good one. Good luck with this. Those plastic connectors are very brittle and can be broken easily with a slip of the wrench.






















Posted on Feb 06, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Honda crx with auto transmission idles roughly in drive or reverse. AC on makes it worse.


There are two coolant lines that connect to this Honda IAC to help quiet the operation of the valve. The part number for a OBDI 1992-1995 Honda Civic Idle Air Controller is 36450-P28-A01. While the OBDII version of this valve is 36450-P2J-J01, and the two units are very similar in design and execution. The EACV or Electronic Air Control Valve is a big part of maintaining your Honda Civic idle. If you've checked your IAC and your Honda still suffers from a surging idle, check your FITV. This Honda Idle Air Controller or IAC is under the throttle body and incorporates into the throttle body passages o locate your Fast Idle Thermo Valve, remove the intake snorkel and locate the FITV beneath your throttle body opening. If your SOHC engine is still having problems, check our guides above on how to check your FITV as well as your IAC. To check this operation, remove your air intake pipe and use your fingers to plug the passages in the lower left hand corner of your throttle body opening. If your idle surge does not go away, unplug your Idle Air Control valve and if that stops your idle surge, your IACV must be replaced. Follow our instructions on how to replace your Honda Civic Idle Air Control Valve. Need to raise your Honda Civic idle or having problems maintaining idle? You can adjust the base idle by unscrewing or screwing in the Idle screw on your throttle body. This screw allows air to bleed into the passages on the backside of your throttle body, as shown above. To learn how to adjust Honda Civic idle speed, you will not need to remove anything. With a standard screwdriver, simply locate your throttle body and Idle screw.

Sep 28, 2016 | Honda Cars & Trucks

1 Answer

On my accord ex 2.2l vtec 4cyl the idle was fluctuating so I turned my fast idle unit and it still does it. So then I unplugged my angle sensor connector and my idle went to 3000rpms. What does this mean...


You should never adjust idle on fuel injection, clean throttle body with air intake cleaner and an old tooth brush, idle is ajust by computer trought automatic idle selenoid, fluctuating is normal to a certain point(cleaning catalitic converter)Check engine code

May 04, 2014 | Cars & Trucks

1 Answer

1991 HONDA ACCORD EX REALLY HIGH IDEL


High idle conditions could be a result of low coolant levels causing the fast idle valve under the throttle body to catch air and not operate accordingly as it needs pressure built once car is warmed up to close the gap of allowed air passage reslting in lower idle at time engine reaches operating temperature. Or the valve could simply

Jan 08, 2011 | 1991 Honda Accord

2 Answers

Speed sensor problem


you may have more than one problem. check fuse 12 on the dash if it good then the gauge assembly may be bad.
check your transmission fluid level
check your coolant level it could make your idle speed fluctuate, if it's good then check your idle control valve.

Feb 25, 2010 | 1990 Honda Prelude

2 Answers

Engine idles excesivly high after carb was rebuilt.


You need a new choke pull off. They are around $30 dollars.

Dec 09, 2009 | Ford F-250 Cars & Trucks

1 Answer

I have a 92 honda accord ex that the it idles go


If it does that when the engine is warmed up (full operating temp.) it may be you iac valve, or your fast idle valve. They get gummed up. It also could be your PVC valve, but probably not.:

accord8.jpg
IAC in red. Fast Idle in yellow. Your PVC valve is plugged into the valve cover (the black hose in between the red and yellow in the picture) it simply pulls out. It should rattle when shaken.
Hope this gives you a start on the problem.

Oct 09, 2009 | 1992 Honda Accord

2 Answers

1986 Honda Accord DX - too high idle on cold start


1986-1989 Honda Accord with Carburetor have a very bad habit that is little known even by most mechanics but easily fixed at home. The vacuum port on the choke opener that is connected to the intake manifold and both vacuum ports on the fast idle unloader get plugged up with nasty hard carbon almost as hard as metal. When this happens the choke sticks closed and the idle sticks on fast idle when the engine is cold and nobody can figure out why. All you have to do is attach a small drill bit to the end of a flexible socket-driver extension and put it in a variable speed drill that will let you run it real slow and carefully drill out the vacuum ports that are plugged. After they are nice and clean use a vacuum pump tester to make sure the choke opener and fast idle unloader are working before putting it all back together. It's amazing how much better the car runs after cleaning out those ports.

Jun 14, 2009 | 1986 Honda Accord

1 Answer

Rough idle(200-300RPM)off idle runs great no white smoke


Have you changed your fast idle valve or air idel control valve I would change the air idle valve because it is the one with an electric sensor.

May 22, 2009 | 1990 Honda Prelude

5 Answers

1997 honda civic 1.6 revving up and down


The most common cause of this is a air pocket in the cooling system, If you've done a coolant flush, changed a hose, radiator, etc..Im not saying that every honda that has a surging idle has this problem but I've worked at a honda dealership for over 10 years and I see this quite often. Let the car idle with the cap off for a while and if that still doesnt do it, jacking up the car as high as you can on the left side while its idling works too..theres a 25 tool thats basically just a funnel that stops this problem if you do alot of your own mechanical work.

Dec 06, 2008 | 1997 Honda Civic

Not finding what you are looking for?
Cars & Trucks Logo

221 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

yadayada
yadayada

Level 3 Expert

63242 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...