IvyMike Posted November 25, 2010 Share Posted November 25, 2010 So yeah my chevette is up to no good. It contaminates plugs (doesn't foul them) with a yellowish white powdery substance, drinks water, has around 140 psi compression across all 4. Are these things known to blow head gaskets or warp heads? Every now and then I'll drive this thing around and it will begin missing, it'll run better with the choke in but still not very well. Then all of a sudden it will come right within itself. I did clean the spark plugs the other day which helped immensely but yeah.. the jitters came back today and then they were gone once again. The last time it did this I replaced the spark plugs and the problem was BAM gone. But now it's back 300k later.. Argh?!?! Your thoughts? Quote Link to comment Share on other sites More sharing options...
Beaver Posted November 25, 2010 Share Posted November 25, 2010 Have you checked the oil in the top of the carb? saw the bonnet up on it this evening down your drive, was gunna pop in for a yarn but didnt see you about Quote Link to comment Share on other sites More sharing options...
IvyMike Posted November 25, 2010 Author Share Posted November 25, 2010 Yeah that's definitely sweet. I was probably in the garage. Bonnet is up quite regularly so I'm sure there will be another chance. Quote Link to comment Share on other sites More sharing options...
Taistorm Posted November 25, 2010 Share Posted November 25, 2010 my chevette use to run like absolute shit aswell, miss firing all the time. The carb caused this (think the diaphragm was fucked), have since upgraded to a 28/36 and it runs preeeemo. so it would definately pay to give the carb abit of attention Quote Link to comment Share on other sites More sharing options...
IvyMike Posted November 25, 2010 Author Share Posted November 25, 2010 DCD? How did you go about mounting that on the standard manifold? Quote Link to comment Share on other sites More sharing options...
Beaver Posted November 25, 2010 Share Posted November 25, 2010 pretty sure he used a modified manifold. check the diaphram in the carb to make sure there are no tears in it Quote Link to comment Share on other sites More sharing options...
d.p.n.s Posted November 25, 2010 Share Posted November 25, 2010 DCD? How did you go about mounting that on the standard manifold? whan i put the weber on mine i just bought a weber alloy adaptor and welded it to a viva manifold the car run much better and had auto choke but still not the best. i think the 1256 mototr is plane evil and needs to be shot. and also yes from what ive heard they are prone to blowing head gaskets and worping heads. cheers dan Quote Link to comment Share on other sites More sharing options...
sholdowa Posted November 26, 2010 Share Posted November 26, 2010 i think the 1256 mototr is plane evil and needs to be shot. qft Quote Link to comment Share on other sites More sharing options...
Taistorm Posted November 26, 2010 Share Posted November 26, 2010 DCD? How did you go about mounting that on the standard manifold? Yea custom manifold mate, the 28/36 was rejetted n what not to suit the engine perfectly though. Quote Link to comment Share on other sites More sharing options...
IvyMike Posted November 29, 2010 Author Share Posted November 29, 2010 Bad ass weber, cheers for the pics So yeah it really packed a sad last night, had to use the choke to get it home. So now the carb is off it and I've taken it to bits to to run a kit through it. I have a feeling the sliding piston is intermittently getting jammed and is causing me this grief. It pings it's nuts off while trying to accelerate.. Has anyone bothered making a tool to adjust the special adjustment bolt on the underside of the float bowl? Quote Link to comment Share on other sites More sharing options...
coldturkey Posted November 29, 2010 Share Posted November 29, 2010 hey, let me know were you get a kit from (I assume its a Stromberg CD150?) and also, how you adjust the mixture nut Quote Link to comment Share on other sites More sharing options...
IvyMike Posted November 30, 2010 Author Share Posted November 30, 2010 I bought the kit from repco, part number "CD200". I work there so the price was good but if your an everyday punter it's quite expensive.. $94. You would be better off getting a kit from trademe. I'll let you know how I go with the tool. Quote Link to comment Share on other sites More sharing options...
ProZac Posted November 30, 2010 Share Posted November 30, 2010 Which repco are you at bro? Quote Link to comment Share on other sites More sharing options...
coldturkey Posted November 30, 2010 Share Posted November 30, 2010 I bought the kit from repco, part number "CD200". I work there so the price was good but if your an everyday punter it's quite expensive.. $94. You would be better off getting a kit from trademe. I'll let you know how I go with the tool. Sweet, yep already sussed this, I got sweet hookups from repco too. Dunno about the adjustment too, might have to fashion up something cause its a bit hard with two screwdrivers upside down eh. Quote Link to comment Share on other sites More sharing options...
IvyMike Posted December 12, 2010 Author Share Posted December 12, 2010 So I thought I'd update on how everything has turned out. Ended up doing the head gasket which wasn't so bad. I am fairly convinced the original problem was caused by poor air/fuel mixture and oil on the piston collecting debris stopping it from moving freely. Had a little bit of trouble with the carb after running some new seals/gaskets through it, turns out there is a little washer which is supposed to sit in between the emulsion tube and the jet to raise the height of the jet. With that in place it's now running reasonably well. Main problem I had is trying to tune the carb with the queer little castle nut on the underside of the carb. Thanks to a friend fabing something up for me, I've now got a little tool to take care of it. It's running a hell of alot better now.. I'm still not 100% sure about the state of the tune but it's nearly there. In the next few days I'll tune it with a Gunson Colortune plug (fricken great idea, you want one) and all will live happily ever after. That's the theory anyway. Ginormous blurry pic of tool: http://img29.imageshack.us/img29/7854/dscf0333a.jpg ZP, burnside in the house yeyuh Quote Link to comment Share on other sites More sharing options...
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