1989 honda prelude. engine surges. from normal to 2100 rpms

Question 1

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1989 Honda Prelude, passed all smog tests except idles at 1100rpm...what's the problem?

start spraying carb cleaner around the intake and listen for rpm drop.

Oct 09, 2012 • 1989 Honda Prelude

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I recently changed the sparks plugs on my 2007 Nissan Versa and now I am getting random idle problems while my car is in park. The car will idle from 1400 rpms them all of a sudden jump up to 2100 rpms and...

If your check engine light is on have it scanned for fault codes. Also check to make sure you don't have a vacuum leak, you could of pulled a hose loose accidently when you changed your plugs.
Signals from the oxygen sensor, and/or a bad throttle position will also cause engine surge.
Good luck, i hope this helps.

Jun 28, 2011 • 2007 Nissan Versa 1.8 Sl Hatchback

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My 1989 prelude looses rpms when i press the brakes

Hi,
Sounds like your power brake Vacuum Booster has a leak. The vacuum
leak will cause the engine to lose RPM.
You should have it checked out as it will eventually start affecting your
brakes.

May 27, 2010 • 1989 Honda Prelude

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My 1989 Honda crx si surges on the rpms. It will go from about 1800- 900 rpms and back again. What's wrong?

It's called hunting. You need to clean out the EAVC unit in the intake manifold. Take off the air filter and housing, run carb cleaner through the intake for 20 minutes or so.

Next bleed the radiator by taking the rad cap off and start the car, let the fan kick in twice (about 20 mins again) and the air bubbles will have been forced out.

Take the car for a spin and the vote for me when it's fixed :)

May 14, 2010 • 1989 Honda CRX

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98 prelude base model engine spitting in rain

Sounds like it could be either a split vacuum hose or your idle control valve is faulty.

Mar 29, 2010 • 1998 Honda Prelude

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2answers

My 1989 Honda CRX SI surges on the RPMs. It will go from about 1800- 900 RPMs and back again. What's wrong?

idle control or thottle position sensor

Mar 24, 2010 • 1989 Honda CRX

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89 Honda Prelude failing emissions rich

is everything stock? and you have catalitic converter in place?

Stop by Schucks auto supply and have them run the codes. i'm sure there is a code if you cant pass emissions. your check engine light bulb is probably out.

and usually the first cause is the first o2 sensor.

Aug 10, 2009 • 1989 Honda Prelude

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1994 prelude h23 2.3 non vtec 5 spd at start up no cel- smooth idle. under accel it jerks and hesitates but rpms stay solid, however unmoving. strong smell of gas. low power. after driving a few minuted...

Try replacing Oxygen sensor (top of exhaust pipe just rear of engine; 22mm ring-spanner job after cutting wires); though normally comes up with Code 1 on the MIL, this is the right bunch of symptoms.

Jun 12, 2009 • 1999 Honda Prelude

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1989 Honda Prelude runs at hight rpms until warmed up

check for vacumm leaks or disconnected vacuumm hoses around the in take manifold!

Nov 20, 2008 • 1996 Honda Accord

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Cold Idle Surge

sounds like you have a vacumn leak some where need to find that first

Jun 19, 2008 • 1999 Honda Prelude

Question 2

Anonymous

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Posted on Oct 01, 2009

Anonymous

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There is a warm up valve on the throttle body(should have 2 small coolant hoses). remove the valve and have someone start the car while you block the port to the valve on the intake. If that clears up the problem you can cut a piece of cardboard to mount in between the valve and intake.should straighten it out.

Anonymous Oct 01, 2009

As I said there is a "Warm up Valve". Not the IAC which is notorious for creating your problems. There are 2 small 12mm hoses and an electrical conn. on the valve. Should be behind the intake.Look for the hoses..

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1989 honda prelude. engine surges. from normal to 2100 rpms

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Related Questions:

1989 Honda Prelude, passed all smog tests except idles at 1100rpm...what's the problem?

I recently changed the sparks plugs on my 2007 Nissan Versa and now I am getting random idle problems while my car is in park. The car will idle from 1400 rpms them all of a sudden jump up to 2100 rpms and...

My 1989 prelude looses rpms when i press the brakes

My 1989 Honda crx si surges on the rpms. It will go from about 1800- 900 rpms and back again. What's wrong?

98 prelude base model engine spitting in rain

My 1989 Honda CRX SI surges on the RPMs. It will go from about 1800- 900 RPMs and back again. What's wrong?

89 Honda Prelude failing emissions rich

1994 prelude h23 2.3 non vtec 5 spd at start up no cel- smooth idle. under accel it jerks and hesitates but rpms stay solid, however unmoving. strong smell of gas. low power. after driving a few minuted...

1989 Honda Prelude runs at hight rpms until warmed up

Cold Idle Surge

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1989 Prelude

1989 Honda Prelude, passed all smog tests except idles at 1100rpm...what's the problem?

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1989 honda prelude. engine surges. from normal to 2100 rpms

1 Answer

Anonymous

Add Your Answer

Attachments: Added items

Related Questions:

1989 Honda Prelude, passed all smog tests except idles at 1100rpm...what's the problem?

I recently changed the sparks plugs on my 2007 Nissan Versa and now I am getting random idle problems while my car is in park. The car will idle from 1400 rpms them all of a sudden jump up to 2100 rpms and...

My 1989 prelude looses rpms when i press the brakes

My 1989 Honda crx si surges on the rpms. It will go from about 1800- 900 rpms and back again. What's wrong?

98 prelude base model engine spitting in rain

My 1989 Honda CRX SI surges on the RPMs. It will go from about 1800- 900 RPMs and back again. What's wrong?

89 Honda Prelude failing emissions rich

1994 prelude h23 2.3 non vtec 5 spd at start up no cel- smooth idle. under accel it jerks and hesitates but rpms stay solid, however unmoving. strong smell of gas. low power. after driving a few minuted...

1989 Honda Prelude runs at hight rpms until warmed up

Cold Idle Surge

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1989 Prelude

1989 Honda Prelude, passed all smog tests except idles at 1100rpm...what's the problem?

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