Question about 1990 Honda Civic

1 Answer

I have a 91' honda civic hatchback and it starts idle surging.

It starts idle surging when the engine gets hot but it doesnt when the engine is cool.What can i do to fix this problem?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 702 Answers

Check and make sure your coolant level is up. If it's up, your idle air control valve is faulty or your cold start solenoid isn't working anymore. Both are activated by the engine water temp.

Posted on Feb 15, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

When I start my odyssey it starts surging. I found a small rubber hose on the right side of the engine, but don't know where the other end of the hose goes....Help


WHAT COUNTY???????????????????????????????????
hot engine, cold or both?/// a key question
WHAT ENGINE: ( usa list , ONLY)
2.2 L F22B I4
2.2 L F22B6 I4
2.3 L F23A I4 2.3 L F23A7 I4
the fsm covers this. hose thing.... all hose can be followed,
unless its axle vents on 4wd cars. (they go no where, special)
is surging the only symtom.?
no engine stalls.?
lack of power in any gear or hills.
no misfiring?
no flooding.?
starts easy/?

ok what is surge, that it really is idle controls bad or out of comtrol
1: idle controls bad. (isc dead?)
2: or engine is running way too lean, and ISC cant keep a grip on idle.

easy huh?
and #3 misfiring so bad the idle controls fail.
are all fuses good?
is the CEL lamp glowing , then goes out running engine.
no , the scan it. or do the flash DTC codes trick.

a good tech ,first finds out if the engine holds closed loop status
hot. at idle, if not, he fixes that first.
as he/she knows that idle is the last thing to work right, in EFI.

one other way to get surge is air leaks (aka. vacuum leaks)
if the engine (unsaid option) is MAP based, it will race fast
with any vacuum leak, and it dont take much of a leak
to make the ISC idle controller go nuts.

so repost , hot/cold both questions
and actual RPM numbers. we need numbers
is the dash Tachometer missing. ????
and what engines in car.

all lean engines surge.
all ISC systems can surge if out of control , not all do this. just 1/2
if the ISC surges, it means its trying hard to gain back control.
this is called a software servo loop.
The ECU is programmed to hold rpm near say 800 RPM hot.
and is very digressive in that role.
I have a 91 car that will surge, with any vacuum leaks.
(by design) depends on which engine.

Feb 15, 2014 | 1995 Honda Odyssey

1 Answer

I have a 99 civic 4 door and the engine surges at idle


hot engine or cold, or both???????????????????
surging or hunting idle is complex but for sure the ECU has lost control of idle speed , there are 2 macro reasons, (vast causes)
1: ISC is stuck (in non SAE terms, the idle speed control valve ) is stuck.
2: engine is missing cause the ISC to GO NUTS trying to control
idle and can not.. the 50 reasons, , have list ask.
we do tests to find out if either or both the above are bad.
do you want tests, or guessing>???

Jan 22, 2014 | 1999 Honda Civic

1 Answer

Honda wont start when engine is warm


Main relay was problem with my 91 civic. Not a problem since replacing. Seems they tend to get hot.

Aug 21, 2012 | 1994 Honda Accord

1 Answer

HONDA CIVIC 1996 PULSING IDLE


It might be bad gas or a plugged filter or it might be a bad mass airflow sensor.

May 03, 2009 | 1996 Honda Civic

1 Answer

Change the headlight assembly on a 91 honda civic si hatchback


I don't believe you do. You may have to take several of the clips or screws out, that also help to hold the bumper cover on , but that should be it

May 03, 2009 | 1998 Honda Civic

2 Answers

Hello to anyone that can help. I am having trouble getting a 91 Honda Civic LX to start when it is hot or when it is hot outside. mechanics tell me it is the main relay plug which is located under the...


it is located on driver side left of fusebox on my 91 civic hatchback. You have to look, its not under the dash but under the side portion where the air vent for heat & air cond. is. Held on by metal bracket that is attached to the relay. you may have to stand on your head to see it or remove your lower dash panel portion to get to it. probably have to pull bolt out of bracket first to access the relay. It took me a bit to find mine but thats where it was.

Apr 21, 2009 | 1991 Honda Civic

1 Answer

1990 honda accord engine surging


Check the throttle sensor and MASS air flow sensor. Throttle sensor cheap check first. MASS nice penny.

Jan 18, 2009 | 1990 Honda Civic

Not finding what you are looking for?
1990 Honda Civic Logo

Related Topics:

439 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 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...