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Old 06-30-2022, 01:47 PM   #11
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You can grab that portion of the harness and tug, twist, pull and shake it really good. Observe the engine for any screwball idling.
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Old 06-30-2022, 02:24 PM   #12
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Originally Posted by Chainsaw View Post
What fuel filter? I cleaned the sock on pump when that was changed.
I have an aftermarket fuel pressure gauge added to my fuel line, but if you look below it you can see the silver canister that is the fuel filter.

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Old 06-30-2022, 09:53 PM   #13
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How in the world is one to loosen that input side clamp on the fuel filter?! Geez.

Adjusted the cold idle cam within spec, was a way bit out. Adjusted once the line was near roller. Idles a bit lower, 1100 or so with A/C off.

Removing the air filter, engine almost dies. Doesn’t, but close.

Also looked into the harness TSB, found the engine loop to lift had rubbed a good bit, sorta repositioned the harness, and wiggled, tugged best I could with engine running, no miss.
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Old 06-30-2022, 10:40 PM   #14
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On the KA24e engines, I think there is a small vacuum tube that attaches to the bottom of the air filter housing. If that comes loose, you will have problems.

I don't have the 4-cylinder, so I have never actually seen that vacuum tube and I'm not sure what problems you will have when it is disconnected.
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Old 06-30-2022, 10:45 PM   #15
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Quote:
Originally Posted by jp2code View Post
On the KA24e engines, I think there is a small vacuum tube that attaches to the bottom of the air filter housing. If that comes loose, you will have problems.

I don't have the 4-cylinder, so I have never actually seen that vacuum tube and I'm not sure what problems you will have when it is disconnected.
It is connected. The stumble would come when air filter and top hat was removed.

Also forgot to add, the pcv tube is broken off the underside of filter base. Tube is there, but only connected to the valve cover.

Last edited by Chainsaw; 06-30-2022 at 10:59 PM.
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Old 07-01-2022, 01:00 AM   #16
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Is the PCV vent valve coming from the valve cover to the top hat of the air filter housing?

There is a mesh filter breather element on the underside of the top hat that allows the engine to breathe and can get saturated with oil. This fiber fill looking little square of filter element should be changed out regularly. This little filter element keeps oil from the engine from being introduced into the intake and oil fouling the spark plugs. I know mine needs it!


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Old 07-01-2022, 01:29 AM   #17
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Is the PCV vent valve coming from the valve cover to the top hat of the air filter housing?

There is a mesh filter breather element on the underside of the top hat that allows the engine to breathe and can get saturated with oil. This fiber fill looking little square of filter element should be changed out regularly. This little filter element keeps oil from the engine from being introduced into the intake and oil fouling the spark plugs. I know mine needs it!


I don’t believe mine had that. Only a rubber tube from valve cover to a 90* elbow on bottom of filter base. I actually broke it years ago, I overlooked the bolt back there and broke the filter base, and doing that took the elbow with it.
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Old 07-01-2022, 01:59 AM   #18
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Yours should have it. It’s OEM. The broken elbow would cause extra intake air. You should epoxy it or add a correct top half of the air filter housing. But I don’t know if it matters or not. I just wouldn’t want oil being ingested into my cylinders and being mistaken for an oil leak with blue smoke puffing out the exhaust.

Sorry. I need to go back and read what your engine issue was again.
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Old 07-01-2022, 02:10 AM   #19
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That should fix the high idle, correct? What about the other issue I am having? It's not really a miss, more of a dead pedal. If you let off pedal when it does it, it will recover and idle. May run fine, may keep acting up. Usually happens cruising around 3k or so. Will usually clear itself up in a few min. I'm sorta thinking electrical.
On this point, you should test the Throttle Position Sensor(TPS). It’s a varister(variable resistor). The service manual will give the steps to test it.
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Old 07-01-2022, 02:49 AM   #20
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Also forgot I pulled codes with my scanner.
P0100
P0180
P0500
P0505

I’ll dig into these tomorrow at work. I downloaded the manual from above to my work computer.
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