Question about 1985 Toyota Pickup

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85 toyota pickup 22r motor idles fine but stalls out climbing a hill or accelerating. Can continue only by stopping and letting the motor idle and then trying again. The problem is inconsistent except

Just bought this vehicle. I have replaced plugs, wires, distributor, and fuel filter. I cleaned the carb and air filter. starts and idles perfectly. When driving up a hill or just accelerating it will start to lurch and hesitate and then wants to cut out completely. I can nurse it along to get off the road by riding the clutch. Motor runs and revs up perfectly in neutral, then I can get back on the road and continue. Sometimes the problem disappears after a few episodes. Trying to climb a steep hill though is a sure way to experience the problem and get in a fix to! Same story though, if I sit and let the motor idle in neutral for 30 seconds to a minute then I can normally get going again. Thanks

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  • Brock Saint Aoro
    Brock Saint Aoro Jan 02, 2014

    Hi Kwabena Acheampong, do a fuel pressure test before and after the pressure regulator. is where i would start. i will find the specs for your fuel pressure and let you know. it sounds like it is stuggling under load and is a fuel issue



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Sounds like it\'s the fuel pump, or a vacuum leak, or it could be the vent line to your gas tank is clogged and not allowing the gas to leave the tank. It can actually build up negative pressure like a vacuum as the gas leaves the tank. There has to be a vent line that only lets air into the tank, it will be a one way valve that may be clogged up. When you are accelerating heavily the gas will be leaving the tank at a faster rate and after a while if the vent is not functioning it will be harder for your fuel pump to suck the gas out of the tank. Keep in mind that it already has the burden of pulling the gas from the bottom of the tank and then pushing it through a 20ft long tube. On top of that it needs to maintain a pressure level that the fuel injectors need to be able to force the gas through them also. It\'s doing a hard job as it is without having to work against any restrictions to the flow or negative pressure that may cause the tank to actually collapse to be able to get any gas out of it. When you let up or stop and let it idol, the pressure build up will decrease and maybe that check valve is stuck but will let a tiny amount of pressure to be relieved very slowly. This would explain the problem, it may have an insect that crawled in there and made a home, leaving a very small amount of room for air to pass through or it may just be stuck closed.

This is just my guess, if it\'s not fuel injected and has a mechanical fuel pump also, it could be in the feul pump itself. I had a high performance fuel pump that had pieces of rubber gasket caught in the line that connected the pump to the carb. It would die out upon acceleration and I would loose every race, finally had my girlfriend watch the glass in line fuel filter to see if the gas was staying flowing or not. I gassed it and she said the gas stopped and there was some black stuff that was coming up into the filter and would go away when I let up. Those were pieces of the fuel pump diaphragms and gaskets that were in the line, problem solved and the only thing I lost after that was my license!

Try loosening up you gas cap and see if it stops, your gas cap may be vented to prevent this also. if you can\'t loosen it then remove it completely, drive it as normal and see if this solves it. Some cars will have warning lights that will show up if the cap is not on but this will not be a permanent thing this is just to see if you need to get a new gas cap or need to replace the check valve. This will be 1 of what may be many steps to take to solve this.

I hope that it\'s this simple, these things can pose headaches that never may be solved.

Posted on Jan 02, 2014


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Did you clean the fuel injectors? these always happen when they are blocked.

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Thanks, I remember doing what you said above a few times and it doesn't seem to work.

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SOURCE: 1994 toyota camry sputters

hi there
sounds like you need a tune up or you need your injectors cleaned
so i will help you clean them with out getting your hands dirty but you need to follow me every step of the way.
first i will give you my tips

  1. get a high quality fuel injector cleaner that you put into your fuel tank
  2. make Shaw you have just under a full tank of fuel
  3. while i never say that one should drive a car like it is a toy you are going to have to do some harsh exhilarating during this
  4. 1000rpm is 1 revs on your dash bored so if i say do 2500rpm it means do 2.5 on your dash (that's only if you dot know what rpm means)
  5. never turn the car off while we do this
  6. please do not speed you put your life and others at risk
  7. please do not drink and drive
OK now for the step by step instructions
  1. have what you need ready to go including the injector cleaner
  2. start your car and let it warm up keep the revs just over 1000 rpm
  3. as the car is running add the fuel injector cleaner
  4. when you have done this i want you to increase the revs to about 2000rpm
  5. keep it like this for about 30 seconds
  6. after the revs are back down to 1000 rpm i want you to get ready to take it for a drive
  7. OK so take it for a light drive around your street keep it very close to home as if your car stops you don't want to have to walk a long way
  8. once you have done this for a while and you feal confident i want you to be a bit quicker in exelarating giving a bit more power remember dont speed
  9. now once you have done this i want you to take her home and let it idle for a bit
    cause you need to get ready to go for a long drive
  10. now that you have got to the bathroom and are ready to go i want you to find a nice open road where you can do 60mph
  11. now that you are here i want you to act like ther is a road train in front of you doing 50mph
  12. now i want you to overtake this road train applying full power by pressing fully dont on the gas
  13. once over tiaken slow back down
  14. i want you to do steps 11 to 13 twice at least
  15. now go back home and let me know how it went
now something to remember for alwase
  1. as stated i dont think you should race or rev the motor all the time to high once a month give it a good run this will loosen and clean all the rubbish from the motor and everythink will run freeley like it should
  2. dont drink and drive
  3. dont speed
  4. saty safe on the roads you life is to valued
  5. and let me know all progress as i want to know if it helped as i pout in a lot of time and effort to helping people on this site
stay safe and happy new year

Posted on Dec 28, 2008

  • 2 Answers

SOURCE: 95 toyota 4runner running bad. can not figure it out.

Check the timing and compression of the engine. It sounds like you either have a blown head gasket or a the timing jumped.

Posted on Mar 26, 2009

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