Two Birds One Stone, and the Heat

Discussion in '1976-1983 Pickup Discussion' started by 83pickup, Jul 25, 2023.

  1. 83pickup

    83pickup Enthusiast

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    Oh I see now, hmmm, it did sound really like the area of the starter however, haven't been able to replicate it since unfortunately, but if I do I will update (if it happens when warm, idling, driving, etc)



    In other good news, I fixed my choke issue! Apparently the jet that operates the choke breaker was leaking somehow, and not supplying ample vacuum to rotate it according to the FSM testing procedure. Replaced it with an Oreily's valve (reminder: it is A valve, not THE valve, but it works) and molested on some 1/8 vacuum line onto it's 1/4 inlet, which makes me wonder how long that hose will last, but anywho it works!!! No more running rich and rough idling/stalling!

    For those interested in what I fixed and exactly how: Toyota Part # 90925-04006 aka the Jet valve thingy is the part I'm talking about. Restricts/does something to regulate flow of vacuum to the choke breaker adjacent from the choke heater and thus move the choke plate. Pretty neat, learned how it works today too.

    EDIT: This upper part of the reply was going to be posted yesterday, but today, upon buttoning everything up and giving it a first start, still idles rough and likes to stall after giving it some gas and letting off... Well, at least I fixed **A** Problem but not **THE** Problem...:verdict_in:

    I did notice after getting it somewhat near operating temps the fuel level on the carburetor, according to the sight glass, was quite above the little marks for the fuel level to be inbetween, could be something with the float level perhaps (if my terminologies are correct, theres lots of names for lots of parts on a carburetor)

    Anywho, this bird is a tough one to stone so I will report on my findings. Might've stoned the wrong bird but I still got it somehow :silly: But for those with a choke breaker issue, Oreily's has a check valve that will work, however it has a 1/4 in. fitting compared to the 1/8 in. ones for the regular vacuum lines found on our trucks.
     
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  2. 83pickup

    83pickup Enthusiast

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    So, I've been asking some locals I know, and consulting the FSM. Of course my rough idle / stumbling on deceleration issue probably relates to something with fuel and/or air delivery; could be with the Fuel Deceleration Cut system. Trying to find commonality with deceleration and idling... :thinking::thinking: Any thoughts on this??
     
  3. 83pickup

    83pickup Enthusiast

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    Welp, decided to fire it up today and see what happens now. Apparently its backfiring on deceleration! :runaway: Warmed up really fast too and sometimes the exhaust was REALLY thick and black... must be rich for sure, but what the heck is causing this? First rough idle and stumbling, now backfiring on deceleration?? It did run okay except for the backfiring today for some reason, albeit the warming up rather fast... o_O

    will look at the deceleration fuel cut system since this seems to be a commonality between both batches of symptoms perhaps :thinking:
     
  4. 83pickup

    83pickup Enthusiast

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    sorry about the inactivity, summer ended and i got food poisoning but today i will be resuming my work today. starting off with the fuel cut solenoid, seems to be the plug is a junction for two other wires, and having to unscrew the solenoid will result in me probably kinking the wires for it, so does anyone know if i have to remove all the attached accessories (choke heater and that other black wire on the far right) to take out the solenoid?
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    red wire goes off the plug to the choke heater, middle black wire for the solenoid, and the far right black wire in the bundle goes to some doodad for something.
     
  5. 83pickup

    83pickup Enthusiast

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    hmmm, not positive on how to remove the choke heater exactly, but on a parts diagram online it shows it as one unit with the "air horn assembly", probably because it seems to be one piece with the choke plate and the coil inside it probably... :thinking:

    any insights on, dreadfully, having to take off the carburetor to get to this solenoid?
     
  6. 83pickup

    83pickup Enthusiast

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    hmmm, no servicing to the solenoid, gave it the FSM test procedure (normal polarity and reversed) and it seems to click just fine. unsure about visusl but since it clicks, should be good then right??
    did notice the wiring to it is different than what the manual specifies though... instead of testing the two top pins of the gangplug, had to trace them to the top right pin and bottom right pin... looks factory however sooo :thinking:
     
  7. Erwin Merida

    Erwin Merida Toyotaholic

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    I ran my 22re rich as hell once and it was backfiring like crazy under deceleration.. but really it was detonating the extra fuel inside the exhaust.
     
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  8. 83pickup

    83pickup Enthusiast

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    ive noticed today, and before that when i run it it likes to spit out soot or whatever this black stuff is on my driveway. doesnt smell like anything really, not to mention the smoke too.
    also on some reconciliation, the work i did before all this crap happened was the thermostat gasket, where i didnt drain out any coolant (bravo to me i guess) and spilled a lot of it in the surrounding areas of the intake and on the passenger side of the engine. thinking i mightve got something soggy with coolant which is why its acting like this too... such as these two sensors around the thermostat housing that look a little too green for their own good... :thinking::verdict_in:
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    especially this guy:
    20231021_154837.jpg
     
  9. Erwin Merida

    Erwin Merida Toyotaholic

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    Those are temp sensors. That wouldn't make suit come out your tailpipe. Condensation or unburned fuel bringing everything else down the pipe. Including valve sludge
     
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  10. 83pickup

    83pickup Enthusiast

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    yeah, i think its just running real rich too for some reason, pulled all the plugs and the fouling on them was a millimeter thick! cleaned them with some napkins and put them back in for now... hmm
     
  11. 83pickup

    83pickup Enthusiast

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    perhaps there is a reason it could be running rich? might be the basis of all my problems in the first place... mightve been looking in the wrong areas first
     
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  12. 83pickup

    83pickup Enthusiast

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    been curious as to the high fuel level on the float glass, seems to share symptoms with what ive been having, running rich, stumble / stall on idle, fouled plugs, any way to adjust the float level then? however in the manual it specifies disassembling the carburetor and bending some part of the float to a certain angle to do that then...
     
  13. 83pickup

    83pickup Enthusiast

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    screw it, why not, taking off the carburetor and the jungle of vacuum lines is probably going to be the most tedious thing ever, having to label each hose and where it goes...
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  14. 83pickup

    83pickup Enthusiast

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    got the carburetor off, quite easy aside me having to buy a 12mm wrench from autozone (in retrospect probably didnt need it for the bolts on the passenger side, but oh well!) and the vacuum / fuel lines. for a first timer, not bad at all! time to adjust the float level, ill keep it posted :)
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  15. 83pickup

    83pickup Enthusiast

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    what have i gotten myself into... :silly:

    choke breaker removal, of course attached ti the air horn, required both diaphragms and their associated linkages removed, unscrewing the fuel cut solenoid required removal of the choke breaker, choke plate has one screw head stripped clean off, second one on my account stripped, tried to hammer a new flathead screw tip into what was left of the one i stripped, filed the screws flush with where the choke plate pivot goes... :rolleyes2:
    20231104_170932.jpg
     
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  16. Erwin Merida

    Erwin Merida Toyotaholic

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    yeaaaa buddy, now you getting dirty!! Keep it up! Even when our trucks seem like nothing is going wrong, going through it is the only way to provide preventative maintenance = less likely to leave you stranded on the road!
     
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  17. 83pickup

    83pickup Enthusiast

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    yep! very simple now that im physically diving into a carburetor. still need some proper education on how some things might work in it but i get the concepts. did bend the float needle valve prong to reduce the fuel comimg in from the jet a teeny bit, now reassembling it after cleaning out all the brass shavings in the primary barrel. only trouble right now is:

    since the choke plate armature has two screws, one of which was snapped off before i got to it, and it is according to Toyota sold as an entire assembly: part number 21054-35210 (now NLA anywhere), does anyone know what screws go into it?
    still need to remove the old ones before i can continue... and then the needle valve spring is a PITA to put back on, any secrets for that??
     
  18. 83pickup

    83pickup Enthusiast

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    clarification: the rod that the choke plate attaches to is the only one of the related parts to have a part number, the screws, and even the plate itself, do not have one from my research.
     
  19. 83pickup

    83pickup Enthusiast

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    finally got thise dreaded things out, threads on the choke plate rod were spared thankfully, took me a bit to drill and tap them out ill see if the threads can still accept an OE size, as i dropped both stripped ones somewhere and cant find neither!! :doah:

    probably ACE hardware for this, and to never touch then again! ill let u folks know what the commercial replacements would be...
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  20. Erwin Merida

    Erwin Merida Toyotaholic

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    :duh:

    You wouldn't be the first.. I dropped my bottom alternator bolt on a 3 hr trip, best option I had was ACE for like 2.50 bolt nd washers, grade 8. No one else had something in stock ATM.
     
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