Question about 1985 Toyota Pickup
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
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: 97 toyota rav 4 dies at accel.
Thanks, I remember doing what you said above a few times and it doesn't seem to work.
on a side note: if it was the fuel pump, wouldn't it be hard to cold-start it?
Posted on Nov 27, 2008
SOURCE: 1994 toyota camry sputters
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
cause you need to get ready to go for a long drive
Posted on Dec 28, 2008
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
Tips for a great answer:
Feb 09, 2016 | 1990 Toyota Pickup
Oct 06, 2013 | Buick Cars & Trucks
Sep 25, 2010 | 1989 Cadillac Seville
Mar 23, 2010 | 1994 Toyota Pickup
Mar 13, 2010 | 1985 Toyota Pickup
Dec 17, 2009 | 1987 Toyota Pickup
Mar 30, 2009 | 1994 Toyota Pickup
338 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: