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Toyota Pickup (pre-Tacoma) issues
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Did you test the EGR temp. sensor? Make sure to plug it back in securely?
Did you vacuum/electric test the VSV? Test the VSV for ground to itself?
Test for any vacuum leaks? Test the EGR itself to make sure the vacuum can open it?
Did you look inside the passageway inside the head to make sure it's not clogged?
Lastly... Did you make sure to reset the computer, pull the EFI fuse?
Just want to rule out the easily overlooked...
What is the VSV, and how exactly do i test it?
I'm assuming since you have a code 71 that you have a California emission truck, right?
In the mean time, do a Google search for 1993 toyota pickup factory service manual. Follow the links and you should find one online that you can use for free.
You're also probably going to need to test the EGR vacuum modulator, which is the saucer shaped thing next to the EGR.
The VSV's are the small block shaped things on top of the valve cover that have vacuum lines and wire harness plugs running to them. The allow the computer to manipulate the engine by opening/closing vacuum valves to control different things. On a CA truck, this includes the EGR. It also has them for controlling the idle up for A/C, and for fuel cut off RPM. If I remember correctly, there are 2 VSV's for the EGR on a CA truck. Have to get back to you for that one.
Start with looking for the manual, I'll try to post up tonight the rest of the info.
I will certainly look into it deeper, that just may be my problem.
Thanks,
Thanks
Thanks,
Justin
Do a Google search for "1993 Toyota pickup Factory Service Manual" that should link you to an online manual from Toyota that can help a lot. The 1990 and 1993 should all be about the same.
Also, www.yotatech.com is another board I frequent. Look it up and use the "search" feature. Search something along the lines of "CV axle replacement".
There are MANY people on that board with the same truck/4WD system as yours with MANY tips and tricks for working on them.
Hope this helps.
Some questions before I invest in parts:
Are the transfer cases the same from auto to manual?
Any need to change or modify crossmembers when switching to manual?
Are the drive shafts the same length when switching to manual?
Do I need to change computers, or is the auto to manual switch OK since there is no electronic shifting?
Thanks in advance for any advice.
Any ideas? I've looked in the under-hood box, and drivers side kick panel, and no joy.
Here's a link for the procedure:
http://www.ncttora.com/fsm/1993/airconditioning/18acswitch.pdf
Many thanks,
J
While cleaning it out, you'll want to put several shop rags below the throttle body to catch the dirt and cleaner that will surely spill out. Also, it will work better if you scrub it with an old toothbrush, too. Spray it, scrub it, spray it again...
Also, know that you may have to reset your idle afterward.
If that doesn't work, then there's a whole list of suspects...
Idle Air Control Valve (if yours is an automatic)
Cold start injector
Cold start injector time switch
Auxiliary Air Vale
And possibly many others, just start with the basic stuff... clean it out.
i have 91 PU that for the last 2-3 years will not start if the temp goes below the 60's or 50's but when it warms up in the morning, it starts just fine (like normal).
No doubt it's some sort of relay or temp sensitive device that will not allow the engine to start when the ambient temp falls.
please help me resolve this burden.
Joel
light and parking brake light came on and within 2 days my truck died on the
road and I needed to get a jump to get me another 2-4 miles and then another
jump and so on until I got home. The next day I took my alt. in to get bench
tested and it was o.k.. So I put it back in and the indicator lights were'nt on.
I drove it around all day with no probs. then that night my dash lights went out
and the indicators came back on and shortly after my truck died again and
needed jumps. I know this must be an electrical prob. but I was hoping some-
one could get me started in the right direction. I've already visually checked
the wiring from the batt. and alt. but don't know where to go from there. The only
vehicle I own so any help would be great.
Thanks, Brian
Check the large fuses in the under-hood fuse box. The largest one in there should be labeled "Alt" (alternator/80 Amps). In mine, it was starting to get corroded, and I suppose, not allowing the juice to flow properly and charge the battery effectively. Also check the other 2 large fuses, I can't remember what they're labeled, but one should be green, and the other red or pink. They were also starting to get corroded in mine, so I replaced them while I was in there.
Note: That big "Alt" fuse is NOT a pull out. It is held in with screws from the underside. You'll have to take off the whole fuse block and get into it from underneath.
It's also a good idea to disconnect the battery while doing this, and while it's disconnected, have it checked too. Make sure it's full of acid, and all the cells are good, etc...
Good luck
I've had my idle set too high and it causes the surging you describe because the brake lights cause an alternator drain, as well as the brake booster causing an engine drain. So, the computer tries to rev the engine up a little, but gets confused, since it's already idling so high. Then, it drops the idle. All this causes the up and down idle you're experiencing.
I am having trouble with my air conditioner. I put 2 cans of freon in it Sat. after evacuating the system. I replaced the expansion valve because of problems. I could see it was doing the same thing, so I did not add a 3rd.
engine off, gauges hooked up. suction 90lbs. high side 100lbs. engine running, air on, -30 suction, high 100???
Also I have a sight glass on the dryer and nothing is circulating.
Thanks, Gary