'87 22R (carb) rough idle - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 06-09-2006, 05:58 AM   #1 (permalink)
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'87 22R (carb) rough idle

My wife’s '87 pickup with a 22R Carbed engine started doing this about 6 months ago.

It would start up cold just fine, warm up and kick down off high idle just like it is supposed to most of the time. Every so often the high idle would be a little rough, then when it kicked down it would die.
It has been progressively getting worse to the point now it does this almost every time. If I can keep it running till it warms up it runs fine after that. One other symptom is #3 and 4 cyl not firing right, spark plugs show dry soot build up.

Done so far:
Compression test, 160 lbs. all 4 holes.
New plugs, wires, cap, Rotor.
New Coil, Fuel filter, Air filter.
Checked all vacuum lines.
No apparent manifold leaks.
Checked valve adj. Right on the money from last adjustment.
FSM EGR tests good. Tap test for sticking good also.

Got me stumped so far. HELP

Thinking about replacing carb with an extra one I have but don't know where to compare numbers for compatibility.
Thought it might be the Igniter but that is a $500.00 SWAG.
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Old 06-09-2006, 06:24 AM   #2 (permalink)
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AAP?
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Old 06-09-2006, 06:46 AM   #3 (permalink)
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x2 on the auxiliary accelerator pump. Try unplugging the vacuum to this and see if the problem goes away. Usually the diaphram will be ruptured causing the engine to suck raw fuel in causing a rich condition. This aap is on a timed temp switch located on the intake so after the engine warms up a bit the symptom would go away as you described.
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Old 06-09-2006, 07:56 AM   #4 (permalink)
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Telltale sign of a aap. fuel in the vacuum lines going to it.
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Old 06-09-2006, 09:46 AM   #5 (permalink)
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I read somewhere that a guy removed his carb cleaned it really well (noted aload of black gunk) and got the injectors cleaned. Made the workd of a diffrence to him!

I have tried to fix my 22r carbed rough idle and its seems its never getting fixed.. Its been overbored and rebuilt, Has loads of power i put new plugs/sparkplug wires distributor cap and rotor all those little things tracted down eletrical/ vaccum lines and to no avail it runs the same dayum way. So i just change the fuel fliter regular and drive it... I have not even looked at the underneath of the carb for black gunk but 100% i would have that mess... I will try to find the link he says he got 15 more hp???

I replaced my app and the egr and still the same????? Dam 22r's

Last edited by jimmyhats; 06-09-2006 at 09:47 AM.
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Old 06-09-2006, 09:52 AM   #6 (permalink)
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Carb & Injectors

Quote:
Originally Posted by jimmyhats
I read somewhere that a guy removed his carb cleaned it really well (noted aload of black gunk) and got the injectors cleaned. Made the workd of a diffrence to him!

He cleaned the carb and the injectors? Must be one of those hybrid carb/EFI trucks.
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Old 06-09-2006, 10:00 AM   #7 (permalink)
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Lost all my toyta folder links they seem to be all over the place ARGHHHHHHHH

Anyways i cannot remember exactly but if you find the fix on your pass it onto me i wil try what you did?
This is why im going chevy
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Old 06-09-2006, 12:34 PM   #8 (permalink)
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Quote:
Originally Posted by gmrwizard
when it kicked down it would die.
Mine did this, so I replaced the BVSV that controls the kickdown.
No longer dies.

However, my idle was not rough.
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Last edited by whitetoy; 06-09-2006 at 12:36 PM.
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Old 06-09-2006, 12:59 PM   #9 (permalink)
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Quote:
Originally Posted by jimmyhats
Lost all my toyta folder links they seem to be all over the place ARGHHHHHHHH

Anyways i cannot remember exactly but if you find the fix on your pass it onto me i wil try what you did?
This is why im going chevy

You might want to go KIA instead.
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Old 06-10-2006, 07:02 AM   #10 (permalink)
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Quote:
I read somewhere that a guy removed his carb cleaned it really well (noted aload of black gunk) and got the injectors cleaned. Made the workd of a diffrence to him!
Quote:
Originally Posted by Alex123456
He cleaned the carb and the injectors? Must be one of those hybrid carb/EFI trucks.
Maybe he has a twin engine truck. One carb and one EFI

No I know what it is. He replaced the Throttle Body with a Carburetor.
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Old 06-10-2006, 07:06 AM   #11 (permalink)
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Didn't have enough (insert name) spay to do a good leak test till yesterday. Picked up two cans of (big guns) starting fluid and did the spray around test. Found a vac leak at the #3 intake runner gasket.
Up till 2100 last night taking it all apart. EXCEPT for the one stubborn bolt (everyone knows that one stubborn bolt all too well) had to be the one at the back of the head holding the water tube clamp. You know the one, wants to break off not break loose. Soaking it with PB blast over night. Getting ready for round two after breakfast.
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Old 06-11-2006, 10:04 PM   #12 (permalink)
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Well the new manifold gasket didn’t cure the problem. Replaced the AAP diaphragm while I was in there. Old one looked ok. I’ve about run out of ideas. I think I will go ahead and change the EGR Valve. It was acting a little funny while I was testing it. Don’t know where else to look.
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Did 75 Toyota (Downey 4X4 conversion Kit)
Doing 88 Toyota 4X4 (7s Desert race truck)
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Wife won't let me touch the 04 Pre-Runner

Last edited by gmrwizard; 06-11-2006 at 10:13 PM.
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Old 06-12-2006, 04:44 PM   #13 (permalink)
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You might just have some dirty jets, get the aerosol carb cleaner, just don't lose any small parts when you take the top off.
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