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Old 01-03-2015, 12:11 PM
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someone help meee!

the idle Seems to stall for a second and then a idles back up and the car run bad. Honda prelude 1997 AT took time looking for this failure and unresolved. I Change map sensor, change IACV (Idle Air Control Valve), clean the throttle and FITV (Fast Idle Thermo Valve), clean the egr, tps, ignition, new wire and new spare, fuel regulator, the car pulls no code. What else I can do? Q someone know?

This is my car doing the problemwatch the video
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Old 01-04-2015, 04:29 PM
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Re: someone help meee!

nobody?
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Old 01-04-2015, 04:36 PM
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Re: someone help meee!

Time to search for a vacuum leak, egr ports might need a cleaning, mine improved when I changed my pcv valve
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Old 01-04-2015, 04:51 PM
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Re: someone help meee!

^^ this

It's a typical thing with these aging cars that were designed pre-enthanol fuel, pre-earth friendly motor oils and the general nonsense that occurs over the years from using them.

It's a vacuum related issue that differs from car to car. But it boils down to the intake system being coated with junk. You gotta just figure out which diaphram is sticking. It causes a vacuum build up at idle speeds.
I managed to get my car to stop stalling by opening the idle adjuster some until I can pinpoint the particular item sticking in my engine.

It's an outside the ecm issue, so it doesn't see anything wrong. And it separates the good diagnostician mechanic from the parts changer. I'm the latter so I'm still trying to solve my issue.
But there seems to be an epidemic lately. That tells me the ethanol is taking it's toll on older cars.
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welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
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Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
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I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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Old 01-04-2015, 06:01 PM
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Re: someone help meee!

That's why I want to bump up the comp in the rebuild. So I can go on 94 oc... The chevrons here promise the 94 has 5% ethanol or less
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Old 01-04-2015, 06:25 PM
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Re: someone help meee!

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That's why I want to bump up the comp in the rebuild. So I can go on 94 oc... The chevrons here promise the 94 has 5% ethanol or less
Nice!!!
Here pumps say 10%. But some local chemists have found as much as 27% in those cheap retailers fuel...that cheap gas is junk. Fine for new cars. But my old jalopy only gets fuel from places known to have good fuel...
Worth the 20 minute trip. Once it's fueled up I add Lucas fuel stabilizer or Stabil Marine...both are the dark brownish green stuff. The blue stuff is the best, but is not readily available here locally anymore.
Seafoam in the tank is good at times. But it's pretty harsh. So it should be added in smaller doses than they reccomend imo. Much smaller.
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Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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Old 01-04-2015, 07:23 PM
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Re: someone help meee!

That makes me want to clean injectors out individually, yearly. Wondering if upgraded injectors don't gum up so easily, hmm. I'm not so crazy about seafoam running through my fuel pump. Lots of give and take, things to consider. My stuff will stay to progress again by spring time. Hopefully. I have to start the KIA which has been sitting for 6 months, due to using work truck to get around, fingers are crossed. First I want to change the oil before starting it up.
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Old 01-04-2015, 08:14 PM
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Re: someone help meee!

Lol...I bought a battery booster...
Because: work truck.

My oil stinks of gasoline. You mention cleaning injectors individually. I'm thinking that may be why my car stumbles when going from above idle speeds to idle...irregular pulses from injector 1 & 4 causing improper flow (and dark plugs), causing improper combustion, causing stall when decelarating...and that wouldn't show up as a code until the plugs get coated enough to trigger a misfire code...
That is going to get explored after investigating all those stupid diaphrams...in the evap, egr, iab and so on.
But by opening the idle screw some, it stays running when it goes back down to idle speed.

Thanks for the idea Static. Best regards to Mr. Cheney progress...and hope the kia starts, and has flat spot free tires. (I over inflate mine 5 psi)

If you change the oil w/o warming it up, leave the drain plug off a couple of hours. I let drain what'll drain. When it drips I put back the plug. A few minutes later it's removed and a stream resumes. I repeat until removing the plug again results in drips.
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Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead

Last edited by bykfixer; 01-04-2015 at 08:21 PM.
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Old 01-04-2015, 08:28 PM
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Re: someone help meee!

Lol, I got a trickle charger.

I would be inclined to think that the first injector in the manifold sees the most pressure. If it were static pressure they would all be the same, but since the pressure is dynamic, it may fluctuate from cylinder 1-4. Gunk may also be predisposed to go for the path of least resistance.. Just a theory tho, I'm not 100% on that. Just have a feeling one injector would get sticky quicker than another.

I've always hated touching that set screw, tho it helped me a couple times.

Its cold here and I was thinking of putting a space heater under to warm up the block to drain all the old oil, overfilling with new oil, draining that again, and then going by measurement.
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Last edited by static420; 01-04-2015 at 08:47 PM.
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Old 01-04-2015, 09:22 PM
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Re: someone help meee!

Quote:
Originally Posted by static420 View Post
Lol, I got a trickle charger.

I would be inclined to think that the first injector in the manifold sees the most pressure. If it were static pressure they would all be the same, but since the pressure is dynamic, it may fluctuate from cylinder 1-4. Gunk may also be predisposed to go for the path of least resistance.. Just a theory tho, I'm not 100% on that. Just have a feeling one injector would get sticky quicker than another.

I've always hated touching that set screw, tho it helped me a couple times.

Its cold here and I was thinking of putting a space heater under to warm up the block to drain all the old oil, overfilling with new oil, draining that again, and then going by measurement.
I tried a 1.5 watt solar charger. Seems it was good at keeping it's flashing light going. But not enough @$$ to keep my battery topped up. I was afraid of a 5 watt without a buffer for fear it would over charge it. So I just pull the ground wire off the battery anymore.

My engine has more days behind it than ahead. But Ima try to squeeze a little more life out of it. I put 130 miles on the car since May. It's been in repair mode ever since. One thing after another.

Good thought about the path of least resistance. That might be why my car has been in repair mode all this time. Hard start, no start, idle issues, stalling, etc etc.

Lord willing I'm going to give the whole induction a good clean this winter. I don't know squat about these injectors, so what better way to learn, right?

Hated adjusting the idle screw...that's kinda as bad as taking it to a shop. Aint above it if all else fails or I need the car. After all...it's there lol. My mechanic went outta business last year. He went to work for a shop I don't dig. Otherwise I'd've paid him $75 to diagnose my issues...

Block heater!
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Quote:
Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
Quote:
Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead

Last edited by bykfixer; 01-04-2015 at 09:34 PM.
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Old 01-06-2015, 11:51 AM
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Re: someone help meee!

Have you checked the plugs? No cel? Sounds more serious than an idle problem. What happens when the car drives under load?
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