I have just done a headgasket/manifold gasket job on my audi 80 1992 (158 thousand miles)carb version(which supprised me as i thought it was injection)
right i did the nasty job because she was leaking from cylinders 2-3 but with very little sign of mayo and running fine bar alittle underpower'`d with a strange airplane noise as you throttle up and drive which differs in tone as you drive under differant throttle positions(sounds like fairly normal engine noise(used to have a volvo 480 that made this noise but that was deffo the normal noise)hopefully
before the gaskets i had no throttle hesitation at all but since its been done i can drive along and it will feel like someone holding onto the backend then letting go ??this happens through all drivng speed ranges(from pulling away to normal 50-60mph driving conditions)
i remember seeing a breather hose with an inch slit in it but this doesnt look new and it didnt cause any probs before so can it really cause this kind of power loss as it idles at 900/1000 rpms fine(more checks today)
when i was cleaning the carb (while running)it had a moment where it picked up in rpms like it just got rid of a block and it sounded like it should normally run that well!!
o2 sensor is new
air filter is dirty but not eccessive(would this have that bigger effect??
i have only had this car a week and i brought it knowing it needed the head done(well i asked if it had mayo and he said no(it did)plus he said 114 thou but states on clock 158 thou
(wasn't too bother'd as the paint is in very good con!!!!
its a 2l manual
he basically ran it without caring and it needs a total overhaul really but this new prob wasn't here before
gonna do plugs as one bridge looked closer than the others(three bridge per spark plug?)
air(with maybe cone but depends if i rid this issue first)
ive done headgaskets before and if the gasket didnt seat it would be evident as most ive had have gone through the coolant bottle(turn over and pressure sends water up and out type of thing)
water getting into the wrong area
this car turns fine and idles fine and after the work it just fired straight up
unlike a volvo i have once(340)which had to be dragged up the road to start)
could even the coolant thermostat do this,? as i think its a dud and is stuck open or alittle,the car runs at 60deg or 70 but most times its lower.(since job its 50-60-70 degress)before it either didnt register at all or got around 50 degrees and back down??
il keep you posted when i can afford to replace bits etc and which one cures it,but any ideas welcome
any ideas anyone?please