Mikuni carburetor

UPDATE: The truck currently starts & runs good, idle speed a little high by 100 RPM or so (but not always?) ~ got my laptop fixed & can upload photos now ~ used laser tach, timing light & hand vacuum pump to discover a new problem, the distributor vacuum advance diaphragm began leaking, did not advance the ignition timing ~ tested the mechanical advance, it works ok...

1) Replaced the dist vacuum advance actuator & tested vacuum advance, works good...
2) Changed engine oil twice & added polymer-ester additive to prolong life of flat tappets ~ no more noisy tappets

NOTE: Telltale sign of a vacuum leak on my truck is the brake pedal ~ the power feel of power brakes is deminished enuff to feel in the foot...

REBUILT MIKUNI PHOTOS

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NOTICE ANYTHING MISSING ON THIS CARBURETOR PHOTO (?) LUCKILY FIXED IT BEFORE CONNECTING FUEL & COOLANT :^) COULD NOT GET THE AIR CLEANER TO FIT ON THE CARB & WHEN I WENT TO GET THE MISSING PLATE & GASKET, NOTICED I ALSO FORGOT TO INSTALL BOTH THROTTLE VENTURIES OMG..!

http://www.mightyram50.net/vbulletin...id=26054&stc=1

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NEW VACUUM ADVANCE PHOTOS

http://www.mightyram50.net/vbulletin...id=25862&stc=1http://www.mightyram50.net/vbulletin...id=25863&stc=1http://www.mightyram50.net/vbulletin...id=25864&stc=1http://www.mightyram50.net/vbulletin...id=25865&stc=1

GETTING GROCERIES PHOTO

http://www.mightyram50.net/vbulletin...id=25866&stc=1

Thank you all @ MightyRam50 ~ could not have done this without a whole lotta help from a lotta you members..!

:layrubber:

Quote:

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Originally Posted by geezer101

Fuel hose orientation? Fuel cut solenoid on the carb not connected? No fuel - at all? Distributor 174 and 3/4 degrees out? :shrug:

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LATE RESPONSE ~ Spark plug wires in the wrong position on the distributor cap ~ all off one space 90 degrees

Quote:

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Originally Posted by claych

???
Apologies,I have not seen brass plugs on any Thermoquad .
???

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Just browsing this old thread & think it is ball bearings epoxied into the cross drilled holes of the Mikuni...

^
Me too, a reference was made to 'ALL' carburators using brass plugs for the 'rifle drilled' passages.
The statement is in error!!!
Oh, xbox,
My '88 with the P.O.S. Jap/French bastardized compromise engine control system ---
1) was supposed to be 'lean burn' (jet valve)
2) was supposed to be 'altitude compensating' -brain dead T/P & O/2 interpolation maps
3)was supposed to provide > 29 MPG , < 2.9K RPM

claych ~ yeah, I know what you mean..! I thought the 1986 carb'd trucks were the ultimate pain until I saw diagrams of the 87 'n later Gen2 carbs & engine bay of vacuum hoses -- I bet assembly line workers enjoyed slapping all that stuff together..! LOL 29MPG hmmm..?

Glad you didn't catch covid

Quote:

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Originally Posted by samram

Glad you didn't catch covid

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LOL the masks ~ so far not sick but pricked 3 times :thumbdown: