Question about 1986 Toyota Pickup 4WD

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Rebuilt carburator new feul pump feul line seems to have no vacuum coming from aap could this make it sluggish idles fine when you take off seems sluggiish and what is a tsvs

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Why does a carbureted motor run fine at cruising speeds, and cold starts but at warm idles and coming to a stop sometimes shuts off and idle surges?


Maybe float level is low. If possible split top off carb to observe wet level inside carb. Thinking 2 things for deceleration that changes pressure in fuel line is volume push by fuel towards front components and maybe Evaporative Emissions is getting solid fuel instead of vapors from splash.

Idle dashpot is part on some early carbs to allow throttle gradual closing. Some are vacuum controlled with what is called a "vacuum tree" which routes the vacuum to the dashpot by temperature. Vacuum tree could have wrong hose routing or THERMOSTAT for engine could be too cold.

Mar 03, 2014 | Ford Festiva Cars & Trucks

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85 s15 hesitates/sputters


check for a faulty / blocked accelerator pump /circuit as this fits the lack of fuel squirt on acceleration description. Also check the timing of the ignition.

Jan 23, 2014 | 1985 GMC S-15

1 Answer

1995 chevy tahoe 4wd. 5.7 liter when cooled down, starting is normal . Right after, engine almost stalls but Idle air control kicks in and keeps it running. eventually it is idling but rouph. On...


If your vehicle has one, and I think it does, check your EGR system. If the egr valve is full of carbon, it can be partially open, creating a vacuum leak. If the egr valve solenoid is bad, it could be opening the valve at the wrong time, also creating a vacuum leak. Unplug the egr vacuum hose, plug the open end of the hose and start it and see what it does. A picture of the egr is below.
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Mar 11, 2017 | 1995 Chevrolet Tahoe

1 Answer

Ive got a Daewoo lanos 2000 model that was working great till it got parked in a garage for 8 months. oil and fuel has been replaced, spark plugs and battery all good. wont run. the most success we've had...


Change all the filters and sitting that long, I would check al the sensors. Take off the connections and spray them with WD 40. Check the feul line and the injectors. If it has a carburator, open the top of the carburator and clean out the jets. Make sure the float level is right. Good luck.

Apr 25, 2011 | 2000 Daewoo Lanos

3 Answers

'87 dodge raider wont ilde.


My 88 raider did the same thing. As long as I had my foot on the gas pedal it would run but if I lifted off the gas it would die. It ended up being a vacuum line. I can't remember which one (possibly the AAP) but not sure. I did replace the AAP diaphragm and all of my vacuum lines.

Jun 08, 2009 | 1987 Dodge Raider

2 Answers

86 toyota corolla, dies at stoplights and idles rogh


well you could try to get a vacuum gauge and see if your car reads what it supposed to and if you buy one it could tell you what it could be.

May 20, 2009 | 1986 Toyota Corolla 2 Door

2 Answers

I just put in a new carburetor in my 87 corolla sr5 and it has cold start problems and the idle wont stay at a set rpm all the time


You probably have vacuum leaks somewhere. Be sure your base gasket is tight, and all your hoses are tight and not cracked. Use a length of fuel hose held to your ear with the engine running, and listen for a hissing.

May 18, 2009 | 1987 Toyota Corolla 2 Door

2 Answers

Vacuum line schematic 1987 toyota corolla le front wheel drive


It is similar to my rear wheel drive two door.

The main vacuum line from a vacuum source on the intake goes to the multi-hose valve on the top and the distributor vacuum advance.This multi-valve switching valve is the main connection to the other vacuum hoses on mine. Two lines come in from a vacuum source and thre go out to three components according to tempature. On mine the middle one off to side 1)goes to choke opener and switching vacumm valves mounted on the fenders the other middle one 2)second from top goes to another choke opener and EGR Valve and EGRModulator. The bottom hose connection is on when cold 3)and goes to a part on the carburator to help it run better when warming up a AAP valve.

There is a check valve diaprham thing inline to the EGR vlave on the second line from top.

I have another vacuum line on the drivers side of the carburator that has a check vlave inline but larger it goes to the throttle linkage to help slow the closing of the trottle on rapid deceleration.126c338.jpg14b3a33.jpgf95de67.jpg9f023f4.jpga890bd7.jpg5531e92.jpg

Mar 15, 2009 | 1987 Toyota Corolla 2 Door

1 Answer

Stumbles on idle,hard to start when cold


That would be your coolant temp sensor it makes the car really hard to start in the cold and has poor acceleration and idle during warmup.

usally this goes away after the motor is hot

Feb 10, 2009 | 1997 Pontiac Sunfire

1 Answer

1984 Toyota tercel wagon


Although this isn"t a proper fix, and may affect emissions, I ran accross this problem on a friend's 87 2wd wagon.

There is a dashpot that controls a lever the Idle set screw is on, I am guessing it is a decel valve that closes butterfly when coasting in gear. I never looked at a manual to figure out what controls the vacuum valve that is on the passenger side of the engine compartment, but if you disconect the vacuum line and plug it that lever will not back off and idle will remain where you set it with the adjustment screw.

Make sure the engine is warmed up and not on a fast idle cam before adjusting idle.

The car is a 5 speed, I not sure if automatic cars are the same.

The car idles fine now and still run's great and gets 37+ MPG with 240000 miles!

If you want to fix it properly you would have to diagnose why that dashpot is being actuated at idle

Sep 01, 2008 | 1984 Toyota Tercel

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