Topic: 22R idling high and dieseling at shut off?

[Toybrota]

I have a 85 Toyota pickup with the 22R.
It's been idling high since today, about 1500-2000 RPM. It made me think that the choke was stuck, until it started dieseling.

I shut it off and it and it'll sputter for a few seconds and then shut off.

Are these two related?

I recently just did new plugs and a compression test. 120 PSI all cylinders.
I also ran some sea foam through the gas tank.
Not that any of this matters really.

Is it possible my timing is off? Or maybe that the seafoam released some crap that's clogging stuff? Ignition fuse is fine, The alternator is bad, but that's getting replaced tomorrow, not that it'd have anything to do with it.

Thanks y'all, I appreciate the help with my stubborn pick up.


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[Gnarly4X]

Did you finish the tank with Seafoam BEFORE installing new spark plugs?

Fast idle and dieseling can be caused by a few things... vacuum leak, sticky choke, hot spots inside the combustion chamber, ignition timing too far advanced, idle jet too far open, fuel shut-off valve not working........


Gnarls.

[Snowtoy]

With it starting after the seafoam, and your oil burning/poor mpg's from your other post, you could have a lot of carbon built up that the seafoam has started to loosen.  If you are running rich, hot carbon pieces can act as an ignition source causing the unburnt fuel to ignite after you turn the engine off.  I would take it out for a couple of hours drive(150 miles or so) at highway speeds, and see if that doesn't help.

[Gnarly4X]

I have never used Seafoam Motor Treatment.... and I'm not fan of it, even though it seems widely used.  I prefer the chemical formulation of Berryman Chemtool B-12.  I've read some posts on bad experiences with Seafoam, and not read anything bad about Berryman Chemtool B-12 as a gasoline additive/cleaner?  I've used it for 30+ years.

Gnarls.

[:)bestgen4runner]

I have never used Seafoam Motor Treatment.... and I'm not fan of it, even though it seems widely used.  I prefer the chemical formulation of Berryman Chemtool B-12.  I've read some posts on bad experiences with Seafoam, and not read anything bad about Berryman Chemtool B-12 as a gasoline additive/cleaner?  I've used it for 30+ years.

Gnarls.

Same different can, Lol

[Gnarly4X]

Same different can, Lol

I don’t think so, Scooter!

Two completely different chemical formulations.

Seafoam contains water, which is what causes the “explosions” inside the cylinders, while producing all that “steam” out the exhaust, and blows pieces of carbon all over inside the combustion chamber…. No bueno! 

Barryman B-12 “dissolves” the carbon and varnish slowly and very cleanly.

That’s just my opinion – it may be worthless.

Gnarls.

[Toybrota [OP]]

The issue has gone away. Strange. I replaced my alternator yesterday, and all the issues went away. Not that they are connected. I am sure it's the sea foam

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[Gnarly4X]

The issue has gone away. Strange. I replaced my alternator yesterday, and all the issues went away. Not that they are connected. I am sure it's the sea foam

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3 cheers for SEAFOAM!!!!!!!!!!!!!!!!!!!!!!

Gnarls.

[Toybrota [OP]]

Ha!

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[kneedownnate]

Only issues I have seen with seafoam is idiots who use it wrong.  Use it correctly and it is great.  I have used both it and b12 in my personal and professional life for many years.

Also, do yourself a favor and buy a can of deep creep.  You'll be able to toss most other spray lubes/solvents you own

[Toybrota [OP]]

Ethanol free Premium is $3.39 a gallon! Spent nearly $50 to get 13 gallons. Jeez.

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[Mudder]

What part of utah do you live in?

[Toybrota [OP]]

Salt Lake, specifically Sugar House.

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[Mudder]

IMO I have a feeling your gas mileage will drop. The reason they offer 85 octane here is for when vehicles were carbed as it helped them deal with the change of altitude.

[Toybrota [OP]]

We shall see.

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