stumbling after overheating

katalla · Posted: Sat Dec 29, 2007 11:25 am Post subject: stumbling after overheating

my car was running great until last weak i had the needle valve start sticking on my way home, the car would sputter and die but i was able to get it home, when i got home it was very hot, the dipstick was extra hot and the oil light flickering. since then i replaced the sticking valve in the carb but it now has a stumbling problem mostly under 2500 rpm, i replaced the accelerator pump diaphram and the faucet looking thing thinking they might be the problem,and i cleaned the carb, but its still there. so u guys think i screwed up the engine or maybe have a burnt valve.
till now i checked timing which is tdc hose disconected it advances smooth, i checked dwell its 46 degrees and replaced spark plugs, i also tuned the carb and still the problem wont go away i did the valves a month ago.which ill do again tomorrow when its cold.
what else might be causing this problem?
Confused

oh its a 30 pic-1 and 205 distributor

katalla · Posted: Sat Dec 29, 2007 7:12 pm Post subject:

its a 1970 beetle , also theres some air coming out of the breather tube
fried rings?

blarneyman · Posted: Sat Dec 29, 2007 8:50 pm Post subject:

Your valves may be the issue. Any time you get one of these motors hot it's a good idea to check the valves.

Some "air" movement out of the breather would be normal, this is how your engine breathes, if it didn't then you would have problems.
_________________
69 Beetle
70 Ghia(resto)

Randy in Maine · Posted: Sat Dec 29, 2007 9:47 pm Post subject:

Adjust your valves and follow with a compression test to see what you have left.

katalla · Posted: Sun Dec 30, 2007 2:32 pm Post subject:

well after adjusting the valves (they were all still in spec) and doing compression check (normal)
i found the freaking problem only took 3 hours heheh
the new EMPI pict 30 carb i got is screwed, its leaking vacuum from the throttle shaft. what a piece of $### im so pissed i spent 150$ on this chinese piece of junk Evil or Very Mad

SkrapMetal · Posted: Sun Dec 30, 2007 3:02 pm Post subject:

Rule #1 Never buy Empi products.

Rule #2 See rule #1

Seriously though, have you searched the classifieds on here for good old rebuilt Solex carbs?
_________________
oo9less since 2007
-72 Ghia-

katalla · Posted: Sun Dec 30, 2007 3:21 pm Post subject:

lesson learned.
well i have a 28 pict 1 that has the same problem but rimco isnt too far from me im thinking of rebushing the old solex, rather than use the empi one
would a 28 pict be sufficient for a 1600 sp engine, what jets do you recommend if i go with that?
thanks

papaphaedrus · Posted: Sun Dec 30, 2007 4:14 pm Post subject:

Adjust the dwell angle too. It should be 50 degrees +/- 2


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