Question about 1994 Acura Legend
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
Posted on Mar 16, 2017
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Posted on Jan 02, 2017
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
'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
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
When the car is completely cool,check the electric fan(s) for smooth rotation.
Clean/check/change the thermo sensor,contact and wire.
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!
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
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.
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Posted on Dec 05, 2009
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