Question about 1994 Acura Legend

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1994 Acura Legend LS 6-spd. Idle Surging RPMs High & Low and doesn't stop after starting. Continues to do it at each stopping point?

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  • 281 Answers

You have air in your coolant. This is a common problem that causes surging idle on the Legends. You need to bleed the cooling system. Have a read here
http://www.acura-legend.com/vbulletin/f4/help-bleeding-cooling-system-142866/

Posted on Mar 16, 2017

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Posted on Jan 02, 2017

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  • 51 Answers

SOURCE: 1998 HONDA ACCORD EX V-6

Sounds like your automatic idle control valve needs to be cleaned. Common irratic idle issue. Just remove, shoot carb cleaner onto ports until comes out clean. should be able to move valve inside easily.

Posted on Oct 10, 2008

mas66
  • 104 Answers

SOURCE: 1996 acura integra idle surging?

Check this out, http://www.hondahookup.com/forums/showthread.php?t=147179
Step by step guide to diagnosing idle issues on your honda.

Posted on Oct 25, 2008

freetek
  • 5568 Answers

SOURCE: Acura Legend 1994 fires, but won't start

'Fires' implies that you have spark and fuel; I think you mean that it cranks with the starter. Checking these separately is not difficult, you need to remove one spark plug lead and insert a screwdriver, then position the wire and the 'extension' so that the shank of the screwdriver is close to, but not touching some metal related to ground. This is about any exposed metal on the engine. When cranking, during each revolution you should see a healthy blue spark between 1/4" to as much as an inch. This tells you that the system supplying the high voltage is at least working. Of course that alone doesn't tell you that each plug is getting spark but to do that, you would need to remove each plug wire from the plug in succession and test them individually. Generally, if you have a single failed plug wire or plug, the engine will start but miss noticeably and it isn't not likely that all plugs and wires fail at the same time.
Checking the fuel supply depends a little on the delivery system. I think your car does have fuel injection so look for a fuel 'rail' that runs parallel to the engine. This is a length of pipe to which the injectors are attached and delivers gas to them. Most of the fuel rails will have a pressure relief valve on them that looks similar to a tire valve. After cranking for a few seconds, depressing the center pin should result in gasoline squirting from it. If it doesn't, you may have a failed fuel pump or a severely clogged inline filter. A bad fuel pump is more likely.
There are other points of failure such as a defective ignition switch but these will not normally fail instantly but become unreliable first.
When a recently run engine refuses to start, it is sometimes due to too much fuel in the cylinders (flooding) and this can cause plugs to fail to fire and can be alleviated by depressing the accelerator pedal completely to the floor and leaving it there; don't pump. This causes more air to enter the engine without causing additional fuel to flow and will, after cranking for 30-60 seconds, dry the plugs out and allow them to fire again.

The fuel pump in your car may be fused so I would check the fuse box for any visibly blown fuses too.

Posted on Nov 17, 2008

fingaz22
  • 1068 Answers

SOURCE: 1994 Acura Legend check engine light is on. When

turn the ignition key to the acc or lock position with the odometer reading showing.

while holding the trip/reset button turn the ignition to the on position. light should flash and go out!

reset done. if you have any more issues plese ask. good luck

Posted on Sep 25, 2009

Mustgo
  • 2359 Answers

SOURCE: My 1994 Acura Legend keeps running hot. Gauge

When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

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Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

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A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

===
Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

Posted on Dec 05, 2009

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1996 acura 2.5 tl upon start up the engine goes to 2500-3000 rpms then the engine rpms start surging between 1500 to 2000 then after several minutes it goes to a normal idle and runs fine.


Hi, I had the same problem, and is now fixed. Replace your idle control valve, and the idle problem will go away, and your car will be PERFECT!

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1991 acura legend idles fine forever but driven for a short distance overheats and overflows coolant tank, also noticed the fans don't go on. thermostat has been replaced.


Legends are notorious for blowing head gaskets- the most obvious signs of a BHG (blown head gasket) are:
White milky substance on the bottom of your oil cap
white sweet smelling exhaust
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Have a mechanic run a compression check on all 6 cylinders- this is the most sure fire way to tell what the problem is.

If all cylinders are good to go- check the hoses going to and from the heater core- these sometimes crack and **** in air which will create problems.

Water pumps for this vehicle are recommended from acura to change every 60000 miles so that could be your issue too.




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While stopped at lights etc.. my car surges and


The idle adjustment screw in throttle body has carbon build up on its tip.need to remove screw clean depoisits off tip,carbon in idlescrew port(with carb clean) re-install idle screw,seat it,then back out 1 1/2 turns.start car and hold at higher idle to blow out carb. clean &deposits out of throttle body then recheck for surging once warmed up.

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Check this out, http://www.hondahookup.com/forums/showthread.php?t=147179
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