sgtjackass Posted July 12, 2008 Share Posted July 12, 2008 I just brought a chevette, ran fine for a day then started running rough as. have checked points, got new dist cap and rotor and cleaned and rebuilt carb- very quickly. engine bogs down hard at load, idles a little rough, and is basically undrivable- unless the choke is on a tiny bit, then it runs generally a hell of a lot better. im doing condenser tomorrow and the spark plugs are carboned up hard, but that could be cause of the carb cleaner that ive used heaps of. im still guessing carb issues, the car had no fuel filter so was full of crap. cars specs are as follows: 1256 ported and shaved head, runs on 98 otherwise pings, weber 28/36dcd carb. lite fliwheel hd clutch and otherwise standard. jope u guys can help me, im a small motor mech but im out of ideas, dont really want to be paying 60 bux an hour to get it fixed. cheers todd Quote Link to comment Share on other sites More sharing options...
Requiemk Posted July 12, 2008 Share Posted July 12, 2008 if putting choke on helps it possibly a vacuum leak leads alright? Quote Link to comment Share on other sites More sharing options...
fuel Posted July 12, 2008 Share Posted July 12, 2008 yeah I'm thinking vac leak eh Quote Link to comment Share on other sites More sharing options...
Jase Posted July 12, 2008 Share Posted July 12, 2008 argh i knew i was right in not buying that little red chevette, have you got the ported shaved head on it?, sounds like overfueling and weak spark, the dissy housings in 1256 engines are prone to running the bushes and causing the points to burn out frequently, i would check that there is an even gap with a feeler gauge as you wind it through the cyclinders, ditch the old leads and grab something from an efi ca16 pulsar or such normally had clear helicoiled leads, check the size of the chokes in your 28/36 as it maybe set up with open chokes that are probably too big, these carbs are tuneable but normally on 1500's up, it maybe worth looking into going to an electronic ignition, other thing is what size exhaust are you running and how well is everything sealed, vacuum leaks = backfires and choking overun Quote Link to comment Share on other sites More sharing options...
sgtjackass Posted July 14, 2008 Author Share Posted July 14, 2008 after days worth of fixing dodgy repairs and misc problems i have concluded that i need a new carb, cause the weber on it is too buggered to be usefull. i found a huge vacuum leak, last owner used tape instead of hoseclamps on brake booster connections. yup got the head and exhaust manifold on, went good as like that for a while now it runs like a bag of shit. it so dam hard to find parts for old shit. Quote Link to comment Share on other sites More sharing options...
Gaz Posted July 14, 2008 Share Posted July 14, 2008 Where you located? Quote Link to comment Share on other sites More sharing options...
Rusted Posted July 14, 2008 Share Posted July 14, 2008 Where you located? Line up a datsun A-series. Massive improvement and quite straight forward. Quote Link to comment Share on other sites More sharing options...
sgtjackass Posted July 14, 2008 Author Share Posted July 14, 2008 im in tauranga. car is going into the shop tomorrow and theyl tune it on the dyno. cheers Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.