95 Civic DX: Surging Idle will not go!
#1
Honda-Tech Member
Thread Starter
95 Civic DX: Surging Idle will not go!
Alright I have had the problem for a month or two now, and so far I've cleaned out the TB, AICV, and the FITV, and also maybe unrelated, I had a shop do a fuel system cleaning. I've also tried bleeding out the air from the system, but it's kind of difficult to do with the coolant going up and down, and with having a 95 civic I have the bleeder screw, but it's broken off twice(Replaced water outlet twice) so I was done using that hahaha, and just did it with the rad cap.
I should also mention that this started happening after I let the gas get a little below 1/4 of a tank. When I first go the car, sometime this summer, so about 4 months ago, I did a tune up including Fuel filter, air filiter, plugs&wire, and distributer cap.
This might be contributing to the problem, but I'm not sure. My car, whever it is a little warm outside (50F+) it begins to overheat at highway speeds, so I'm thinking the radiator is clogged/may have more air in it, because the fan kicks on, and the thermostat and thermostat sensor are new, along with a new rad cap. But if it's cold outside the car runs fine and will never overheat. Anyway...I heard having clogged radiator, or air in coolant system causes a surging idle. But the overheating thing came before the surging idle, not really at the same time.
So please someone have an answer for me! Haha, I'm going crazy over this stupid idle problem. Thanks everyone!
Car is a 95 Honda Civic DX completely stock
I should also mention that this started happening after I let the gas get a little below 1/4 of a tank. When I first go the car, sometime this summer, so about 4 months ago, I did a tune up including Fuel filter, air filiter, plugs&wire, and distributer cap.
This might be contributing to the problem, but I'm not sure. My car, whever it is a little warm outside (50F+) it begins to overheat at highway speeds, so I'm thinking the radiator is clogged/may have more air in it, because the fan kicks on, and the thermostat and thermostat sensor are new, along with a new rad cap. But if it's cold outside the car runs fine and will never overheat. Anyway...I heard having clogged radiator, or air in coolant system causes a surging idle. But the overheating thing came before the surging idle, not really at the same time.
So please someone have an answer for me! Haha, I'm going crazy over this stupid idle problem. Thanks everyone!
Car is a 95 Honda Civic DX completely stock
Last edited by Ericjergs; 11-01-2011 at 12:25 PM.
#3
Re: 95 Civic DX: Surging Idle will not go!
Try this:
Bleeding the cooling system may take 20-30 minutes.
1) Park the car on an inclined driveway with the front end higher than the rear.
2) Push/turn the dash heater lever/**** to MAX heat. Fan need not be on.
3) Follow the directions in the diagram below
Bleeding the cooling system may take 20-30 minutes.
1) Park the car on an inclined driveway with the front end higher than the rear.
2) Push/turn the dash heater lever/**** to MAX heat. Fan need not be on.
3) Follow the directions in the diagram below
#4
Re: 95 Civic DX: Surging Idle will not go!
i had a horrible surging idle for about 2 months, then one day at my buddys shop i decided to get my ecu chipped (93 coupe with mini me swap) and it stopped, lol, weird
#5
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Re: 95 Civic DX: Surging Idle will not go!
@Ron-Well I already tried doing this, but the coolant inside goes up and down and some bubbles come just from it doing this because it falls below the little spout(?) that the cap goes into. So I'm not too sure when to stop, but I think I got alot of air out as I did it for about an hour.
I'm going to have the radiator flushed because my poor college @$$ will be finally running into some money, haha but that should get rid of all the air if there is any correct?
and @Krogers-LUCKY YOU!!! Hahaha
I'm going to have the radiator flushed because my poor college @$$ will be finally running into some money, haha but that should get rid of all the air if there is any correct?
and @Krogers-LUCKY YOU!!! Hahaha
#7
Honda-Tech Member
Thread Starter
Re: 95 Civic DX: Surging Idle will not go!
Just a quick update....
I plugged the whole to the IACV inside the TB and nothing changed. I sprayed some TB cleaner around some vacuum lines that I know of, I'm sure I missed a few, and the idle didn't change. I then covered the whole TB opening and it died, so there isn't a vacuum leak inside the TB.
So I want to get the radiator flushed to rule out any air in the radiator, but luckily for me.....my cv joint is going bad now -______- so need to fix that first.
Also surging idle only happens after warm-up.
I plugged the whole to the IACV inside the TB and nothing changed. I sprayed some TB cleaner around some vacuum lines that I know of, I'm sure I missed a few, and the idle didn't change. I then covered the whole TB opening and it died, so there isn't a vacuum leak inside the TB.
So I want to get the radiator flushed to rule out any air in the radiator, but luckily for me.....my cv joint is going bad now -______- so need to fix that first.
Also surging idle only happens after warm-up.
Last edited by Ericjergs; 11-12-2011 at 09:44 PM.
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#13
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Re: 95 Civic DX: Surging Idle will not go!
All was done when engine was cold, should I go ahead and wait till car warms up, and the surging idle actually starts to happen, or is that still necessary?
#15
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#16
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Re: 95 Civic DX: Surging Idle will not go!
Okay so here is the update. I let it run for about 15 min and it hadn't started surging yet, and was well into operating temp. It was on the otherhand hunting for a steady idle as the sound from the motor was changing slightly(barely noticeable). So to get it to begin surging I pressed on the gas pedal very slightly and only for about half a second. Surging instantly began.
When covering the IACV hole the car dropped down to a seemingly low idle and stopped surging. The FITV hole still had a small amount of suction, but it didn't effect the idle.
When covering the IACV hole the car dropped down to a seemingly low idle and stopped surging. The FITV hole still had a small amount of suction, but it didn't effect the idle.
#17
Re: 95 Civic DX: Surging Idle will not go!
Assuming that you have thoroughly bled the cooling system, then test the TPS and ECT sensors. If those are fine, adjust the idle speed (see FAQs sticky).
Also adjust the FITV so that there is NO suction when the engine is hot.
Also adjust the FITV so that there is NO suction when the engine is hot.
#18
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Re: 95 Civic DX: Surging Idle will not go!
But because the engine idled fine after I plugged the IACV hole, doesn't that mean the IACV is messed up or something?
#19
Re: 95 Civic DX: Surging Idle will not go!
A toolbox for working on cars should have a multimeter. Get one.
Is CEL code 14 thrown? If not, you've cleaned the IACV, so I'll assume it's fine. Do the tests I mentioned and then adjust the idle speed.
Is CEL code 14 thrown? If not, you've cleaned the IACV, so I'll assume it's fine. Do the tests I mentioned and then adjust the idle speed.
#20
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Re: 95 Civic DX: Surging Idle will not go!
Alright I'll ask around, I'm sure one of dad's friends has one. and no, no codes are thrown. Sometimes I wish one was so I would know what it was! Haha, but I'll do the tests and post back here as soon as I check everything.
#22
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Re: 95 Civic DX: Surging Idle will not go!
Yeah it has come on before, when I first bought this money pit... -_-
but yeah I may just buy a multimeter, aren't they only like 10-20 bucks?
but yeah I may just buy a multimeter, aren't they only like 10-20 bucks?