OK, I’ve got one that’s had me stumped for almost a month. I’ve got a
federal (non-CA) ’87 4×4 with a 22R. It runs very rich at all RPMs
unless I drive it for at least 20 minutes at freeway speeds. When it is
thoroughly heated up does it run well at all RPMs. The exhaust is dirty
black. I’ve temporarily traded carbs with a friend who had an extra
california carb around the same year, and it runs fine. I plugged all
hoses and openings that the two carbs didn’t have in common when I
traded.
But I don’t see what’s wrong with my own!! I’ve checked the float
level, choke, fuel cut solenoid & O-ring, and visually inspected the
entire inside of the carb. None of the pin/needle thingies inside seem
to be sticking, and I’m able to circulate air through all the passages.
There are ‘sooty deposits’ inside my carb, but in unexpected places.
There are black sooty deposits only in the primary barrel, and there
only from the throttle plate up. I would have thought that if the
engine were backfiring enough to cause these deposits, then it would be
all over inside the intake manifold, and bottom of throttle plate as
well.
My two questions are:
1) Of course, what could be wrong?
2) If I don’t know what’s wrong, could I assume that a rebuild would
take care of this problem, or should I rather spend the big bucks for a
new carb from the start?
-Bryan
Sent via Deja.com http://www.deja.com/
Before you buy.
Try checking the AAP Diaphragm on the Carburetor. I had the exact same
problem on my 83 Toy 4 X 4 with the 22R carburetor engine. The AAP
(Auxiliary Acceleration Pump) Diaphragm makes it run rich and mine had the
exact same problems as yours. On mine, the part cost me $18.00 plus tax and
after I put it in, the truck runs better than it has in years. The old
diaphragm had a pinhole in it causing it to constantly pump gas into the
carburetor. According to the Toyota parts guy, this is a pretty common
problem on that 22R carburetor. Hope this helps, my Part Number for my 83
22R was 21675-35330.
Hope this helps out, please post your comments if this helps.
- Hide quoted text — Show quoted text -
<bkubi…@my-deja.com> wrote in message news:8ftbgj$45t$1@nnrp1.deja.com…
> OK, I’ve got one that’s had me stumped for almost a month. I’ve got a
> federal (non-CA) ’87 4×4 with a 22R. It runs very rich at all RPMs
> unless I drive it for at least 20 minutes at freeway speeds. When it is
> thoroughly heated up does it run well at all RPMs. The exhaust is dirty
> black. I’ve temporarily traded carbs with a friend who had an extra
> california carb around the same year, and it runs fine. I plugged all
> hoses and openings that the two carbs didn’t have in common when I
> traded.
> But I don’t see what’s wrong with my own!! I’ve checked the float
> level, choke, fuel cut solenoid & O-ring, and visually inspected the
> entire inside of the carb. None of the pin/needle thingies inside seem
> to be sticking, and I’m able to circulate air through all the passages.
> There are ‘sooty deposits’ inside my carb, but in unexpected places.
> There are black sooty deposits only in the primary barrel, and there
> only from the throttle plate up. I would have thought that if the
> engine were backfiring enough to cause these deposits, then it would be
> all over inside the intake manifold, and bottom of throttle plate as
> well.
> My two questions are:
> 1) Of course, what could be wrong?
> 2) If I don’t know what’s wrong, could I assume that a rebuild would
> take care of this problem, or should I rather spend the big bucks for a
> new carb from the start?
> -Bryan
> Sent via Deja.com http://www.deja.com/
> Before you buy.