Hey everyone! I've been a stalker here for about 7 years or so until I found a deal on a 1984 4WD back in August that I couldn't refuse. 126k original miles on the clock and I am now the 3rd owner. Interior is absolutely mint and it runs very well once I replaced the clutch.
Only real issues I'm having are:
1. I cannot, for the life of me, fill the tank past half at the gas station or by hand (I'm fairly certain it has a ventilation issue due to it being a new tank)
2. It developed a fairly aggressive shake at idle about 2 weeks ago
3. It warm idles at about 1.5k rpm and the cold idle creeps up to about 4.1k rpm
Happy to be officially part of the community now! (Bonus pic of it next to my FUN-dra)
New owner introduction
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StupidMuphin
- Newbie
- Posts: 5
- Joined: Thu Mar 29, 2018 10:01 am
- My tercel:: None yet
New owner introduction
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dlb
- Highest Ranking Member
- Posts: 7442
- Joined: Mon Jul 06, 2009 9:03 pm
- My tercel:: '87 sr5, '83 dlx parts car
- Location: bc, canada
Re: New owner introduction
Welcome to the forum SM! Where are you located? Looks fairly hot, I'm going to guess California or Arizona?
1. A lot of people here with aftermarket fuel tanks have run into similar issues with filling them. I don't remember anyone having figured out the cause or fixing it but it's worth doing a search here just in case I missed any posts about that.
2 and 3. I would guess that these two issues are related, and that the cause is either a vacuum leak, incorrectly routed vacuum hoses, something on the carb malfunctioning, or some combination of those things. First thing I would do is follow the carb setup steps in the factory service manual (aka FSM) which you can download here or from the 4wd Tercel Facebook group because it sounds like your fast idle (or cold idle as you called it) is too high, and if it's way off like yours is that can affect both idle and running at other times. Next I would use the sticker on the underside of the hood to confirm that all the vacuum hoses are going to the right places and firmly connected. Also suck on the hoses that go to diaphragms and make sure you can't suck air through, if you can it means the diaphragm there is ruptured and needs to be replaced.
If all of that doesn't solve it, next I would check the AAP on the carb. It's a diaphragm on the lower front passenger side of the carb. It is fairly common for it to rupture over time, and when it does it allows manifold vacuum to suck fuel through the intake manifold to the #1 combustion chamber basically all the time which can cause poor fuel economy and a variety of poor running issues. If you're a good redneck you can just suck on the hose that goes to the AAP and if you get a bit of gasoline in your mouth, there's your problem.
Good luck!
1. A lot of people here with aftermarket fuel tanks have run into similar issues with filling them. I don't remember anyone having figured out the cause or fixing it but it's worth doing a search here just in case I missed any posts about that.
2 and 3. I would guess that these two issues are related, and that the cause is either a vacuum leak, incorrectly routed vacuum hoses, something on the carb malfunctioning, or some combination of those things. First thing I would do is follow the carb setup steps in the factory service manual (aka FSM) which you can download here or from the 4wd Tercel Facebook group because it sounds like your fast idle (or cold idle as you called it) is too high, and if it's way off like yours is that can affect both idle and running at other times. Next I would use the sticker on the underside of the hood to confirm that all the vacuum hoses are going to the right places and firmly connected. Also suck on the hoses that go to diaphragms and make sure you can't suck air through, if you can it means the diaphragm there is ruptured and needs to be replaced.
If all of that doesn't solve it, next I would check the AAP on the carb. It's a diaphragm on the lower front passenger side of the carb. It is fairly common for it to rupture over time, and when it does it allows manifold vacuum to suck fuel through the intake manifold to the #1 combustion chamber basically all the time which can cause poor fuel economy and a variety of poor running issues. If you're a good redneck you can just suck on the hose that goes to the AAP and if you get a bit of gasoline in your mouth, there's your problem.
Good luck!
Re: New owner introduction
Nice wagon! Reminds me of my first T4 with the classic blue plaid interior.
Others have reported troubles with venting on aftermarket tanks... but an old sending unit may report less than full. If the screws are not rusted, carefully removing the sender will allow a closer look inside. The idle shake could be ignition. Are the plug wires old? If you are feeling bold, pulling the plug wires one at a time with heavy gloves might reveal something about one of the cylinders. Another possibility might be the carb. It doesn't take much to clog the slow jet or other small fuel passages. Check all the vacuum lines and diaphragms for leaks. A carb rebuild kit might be a good investment. Download the FSM and try adjusting the idle. Sometimes reaching the 650 rpm warm idle can be tough until all other systems are in order. 900 rpm might be more reliable until you have been through everything. Good luck and welcome!
Others have reported troubles with venting on aftermarket tanks... but an old sending unit may report less than full. If the screws are not rusted, carefully removing the sender will allow a closer look inside. The idle shake could be ignition. Are the plug wires old? If you are feeling bold, pulling the plug wires one at a time with heavy gloves might reveal something about one of the cylinders. Another possibility might be the carb. It doesn't take much to clog the slow jet or other small fuel passages. Check all the vacuum lines and diaphragms for leaks. A carb rebuild kit might be a good investment. Download the FSM and try adjusting the idle. Sometimes reaching the 650 rpm warm idle can be tough until all other systems are in order. 900 rpm might be more reliable until you have been through everything. Good luck and welcome!
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StupidMuphin
- Newbie
- Posts: 5
- Joined: Thu Mar 29, 2018 10:01 am
- My tercel:: None yet
Re: New owner introduction
Im located in Colorado, definitely gets hot but not Arizona hot.dlb wrote: Mon Oct 21, 2024 8:39 am Welcome to the forum SM! Where are you located? Looks fairly hot, I'm going to guess California or Arizona?
1. A lot of people here with aftermarket fuel tanks have run into similar issues with filling them. I don't remember anyone having figured out the cause or fixing it but it's worth doing a search here just in case I missed any posts about that.
2 and 3. I would guess that these two issues are related, and that the cause is either a vacuum leak, incorrectly routed vacuum hoses, something on the carb malfunctioning, or some combination of those things.
I appreciate the suggestions and info! I have read multiple the read over the years just for research even as I've been window shopping for a T4. My work schedule just doesn't give me as much time as I would like to do a deep dive on the car itself.
I found out the hard way that the sender and low fuel light are correct as I ran out of gas about 40 miles after the light popped on. I do plan on checking the plug wires first as well. Appreciate the responses!Paul wrote: Mon Oct 21, 2024 8:59 am Others have reported troubles with venting on aftermarket tanks... but an old sending unit may report less than full. If the screws are not rusted, carefully removing the sender will allow a closer look inside. The idle shake could be ignition. Are the plug wires old? If you are feeling bold, pulling the plug wires one at a time with heavy gloves might reveal something about one of the cylinders. Another possibility might be the carb. It doesn't take much to clog the slow jet or other small fuel passages. Check all the vacuum lines and diaphragms for leaks. A carb rebuild kit might be a good investment. Download the FSM and try adjusting the idle. Sometimes reaching the 650 rpm warm idle can be tough until all other systems are in order. 900 rpm might be more reliable until you have been through everything. Good luck and welcome!
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gnarnold
- Top Notch Member
- Posts: 334
- Joined: Sat Jan 04, 2014 7:28 am
- My tercel:: 1983 SR5 4x4 with a tummy tuck and a nose job and now a pace maker!
- Location: jordache ,ca
Re: New owner introduction
Buy about 12- 13 feet of vacuum line ,some hose clamps ,a can of starter fluid or carb cleaner start the car spray very light spurts near all vacuum connections. If it revs with a spurt you have a leak . Follow the vacuum diagram under the hood if there isnt one , there are many tercel master technicians here that has the link .StupidMuphin wrote: Mon Oct 21, 2024 8:04 am Hey everyone! I've been a stalker here for about 7 years or so until I found a deal on a 1984 4WD back in August that I couldn't refuse. 126k original miles on the clock and I am now the 3rd owner. Interior is absolutely mint and it runs very well once I replaced the clutch.
Only real issues I'm having are:
1. I cannot, for the life of me, fill the tank past half at the gas station or by hand (I'm fairly certain it has a ventilation issue due to it being a new tank)
2. It developed a fairly aggressive shake at idle about 2 weeks ago
3. It warm idles at about 1.5k rpm and the cold idle creeps up to about 4.1k rpm
Happy to be officially part of the community now! (Bonus pic of it next to my FUN-dra)
I used to laugh at the man with a pinto 
, until I became a humble servicer of a tercel 
, until I became a humble servicer of a tercel -
gnarnold
- Top Notch Member
- Posts: 334
- Joined: Sat Jan 04, 2014 7:28 am
- My tercel:: 1983 SR5 4x4 with a tummy tuck and a nose job and now a pace maker!
- Location: jordache ,ca
Re: New owner introduction
Enjoy the journey of TERCEL you will laugh you might cry but you will ..grow.
I used to laugh at the man with a pinto , until I became a humble servicer of a tercel
, until I became a humble servicer of a tercel