Question about 1985 Toyota Pickup

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88 Toy, 22R Carb, hard cold start

I have done tune up, checked vacume lines fuel pump, serviced fuel system, takes almost a minute to fire, once started runs excelent, and if engine is warm it will start right up, once cool hard starting again. motor has 217K on it, cant seem to locate any failing sensors, or vacume leaks.... any ideas?

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  • freightspeci May 25, 2009

    no, i have not adjusted anything on the carb, once the engine warms up it has no hesitation and has alot of power for the milage.

    It acts like there is a fuel cut off that needs vacume to build up at the carb, i could me mistaken tho.

  • freightspeci May 25, 2009

    I have checked the plunger/pump that is pedal activated, it sprays fuel ok, when i depress the pedal it will send a jet of fuel and the engine will fire momentatily, then back to cold cranking .



    I will adjust the air bleed this afternoon, and dbl chk the jet of fuel from the small pump deal, Thank you all for your time and suggestions!!!

  • its420_us May 11, 2010

    Let your vehicle warm; there's a screw on the bottom of the carb that has a spring on it. Turn it all the in, then back it out until the vehicle runs smooth.

  • its420_us May 11, 2010

    Did you adjust your air/fuel mixture?

  • Anonymous Mar 15, 2014

    2004 Kia Sedona - Timing Belt and water pump changed, transmission fluid flushed and tune-up. Now that this service has been done, I have driven my van from the shop to go towards home and it "chokes", "lunges" then stalls. Once I was able to start it right away and once I was not until 3 or 4 minutes. They changed the crank sensor and a loose ground wire. Still the same result. Why?

  • Anonymous Mar 15, 2014

    2004 Kia Sedona - Timing Belt and water pump changed, transmission fluid flushed and tune-up. Now that this service has been done, I have driven my van from the shop to go towards home and it "chokes", "lunges" then stalls. Once I was able to start it right away and once I was not until 3 or 4 minutes. They changed the crank sensor and a loose ground wire. Still the same result. Why?

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In your carburetor there is a priming passage. look in there with the air cleaner out and pump the butterfly it should squirt gas. if it doesn't then you need to open the top part of the carb and clean the hole with a hair clip. if this is not the problem it will be the choke but I'm 70 percent that this is the problem.

Posted on May 25, 2009

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First 2 things to check are the choke adjustment and operation, and the raw fuel squirt from accelerator pump when throttle pumped. You should be able to see a good squirt of gas into throat of carburetor when you move throttle linkage to wide open quickly. Choke plate ( butterfly) should be in closed position for cold start, then open gradually as engine warms up. Have you checked that as of yet? With re-start problems after warm up, may be needle and seat assembly needs replacing to retain proper fuel level in bowl for starting. If they are dirty or worn, fuel in bowl runs back out. It sounds like a carb rebuild kit might be a good idea.

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a couple of places to look at would be the carb,(float bowl and needle valve)to see if it might be overloading it with fuel,the other would be the choke weather it be electric or vacume/mechanical, then look at the egr valve to see if is operating right,check the vacume on it also,if u pull a vacume on it, and it does the same thing, that it has been doing then its either going bad or there is a vacume problem.
If it is the fuel overloading it you can check the plugs to make sure,check for a black,sooty build up on them.(carbon buildup)
being as you put a new fuel pump in it it might be possible that it has blown an internal seal in the carb if its the original carb,and that would cause it to stall out till the fuel level came back down in the float bowl.

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You may be weak on fuel pressure . even a couple of lbs low on a cold start will cause a no start.
Double check cold start cranking fuel pressure. If under 63-62 lbs you have problems.
one test is to give it a squirt of carb cleaner not starting fluid. If it starts then you have a fuel pressure problem.
Run the full fuel pressure test and post back pressures.
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Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure.
Later V6 and V8 gm engines should have 60-66 fuel pressure.
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If you do not have full fuel pressure on a cold start the injectors will not squirt fuel.
Do not leave home without it.
Engine running should be 60-66 lbs pressure depending on engine load.
Full pressure with return pinched off should be 75-85 or more.
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Post back fuel pressure readings.

The 75-85 is only a check on the capable full pressure of fuel pump.
If you can not find the rubber return line check full pressure by plugging return line or just or the true full pressure can be taken direct at the end fuel filter.

What are the pressure readings that you have done. Good luck and hope the fuel pump is not a bad one you put in there, it's know to happen.

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