CHESTNUTXE 7,308 Posted August 21, 2016 After chopping the bump-stops that were riding on the suspension arm,and taking the car for a few drives i noticed it was starting to run rough-so i pulled the plugs and yep all blacked up,couldnt work out why ,last tune was ok then i looked into the carby while it was running and saw dripping from the secondaries into the booster,so i figured that by changing the height of suspension had made the float level a bit different from last it was done with the different height level,so i adjusted down the float and seems all good now,i wouldnt have thought that such a small change would have done this and it was on left hand booster,same side as i damaged the guard . Share this post Link to post Share on other sites
gerg 10,871 Posted August 21, 2016 I would think that's a coincidence myself, I come across it a lot in my line of work. You have multiple problems occurring at once and your brain immediately thinks they're related. Sometimes, shit just happens all at once. One booster leaking and the other not tells me that you might have a blocked air bleed or emulsion hole, or it's just the usual Holley manufacturing tolerances. If it was float level alone, both boosters should be leaking (unless the car is on a sideways slope). 2 Valvebouncer and CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 21, 2016 Yeah it was on a slight angle,i will check it again today on the flat garage. Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 22, 2016 2 of the plugs were still fouled after the first clean,now will give it a start and go from there ,check the float again and idle mixture. Share this post Link to post Share on other sites
gerg 10,871 Posted August 22, 2016 If your boosters are anywhere near dripping at idle, your floats are too high. I like to open the throttle to the end of the transfer just when the boosters start flowing, and watch what the fuel is doing. If it's coming out in blobs or drips, it's probably coming out too soon (float too high). I wind the float way down and listen for a stumble right at the point of transition (float too low) then wind it back up till the stumble's gone. You can do this with the secondaries on a vac carby if you disconnect the link rod from the primary and work the throttle by hand. The factory setting is merely a baseline to work from. Every engine is different in what it needs from the carby. 3 XTREME KARTS XF, CHESTNUTXE and stockesp reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 22, 2016 yes true,to check cruise and normal driving cond,disconnect the secondaries and just drive around on the primarys for a bit then read the plugs for correct jetting under normal driving,i will give it a go soon. 1 gerg reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 22, 2016 seems better now,no fuel dripping in,another question once plugs are fouled are they still good if they are re-cleaned ? or should you just get a new set. 1 gerg reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted August 22, 2016 About 2 months ago I pillaged the XB for a set of BP4FSs that were all as black as a lump of coal but chucked them in the wagon anyway. Fired straight up and never thought about it again till now. The carbon burns off in no time, it's oil fouling that I find messes them up. The set I pulled out had that grey oil ash coloured crap on them, could barely see where the insulator was.<br /><br />Whatever you do, don't buff them on a wire wheel or brush. The porcelain gets a fine coating of metal from the bristles and the spark will track on it instead of jumping the gap. 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 22, 2016 um errrr thats exactly what i did,maybe thats why it aint runnin good 1 SPArKy_Dave reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 22, 2016 what is the best method to cleaning plug's,gerg im running BP6FS is that the norm for a street engine,i see you have 4's Share this post Link to post Share on other sites
gerg 10,871 Posted August 22, 2016 I'd stand them up overnight in lemon juice (no shit) as it takes the carbon off. Your engine is pretty stock yeah? I'd probably run 5s or 4s, 6s are a bit cold on a stocker. Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted August 22, 2016 i will just buy a new set of 5's and give them a go. 1 gerg reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted September 15, 2016 after about 100km of driving the plugs are clean but now im getting a cough or sneeze at high rpm when the secondaries are opening,maybe now the float is to low ? Share this post Link to post Share on other sites
gerg 10,871 Posted September 15, 2016 Sounds more like coil, mainly due to it being higher rpm. 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted September 25, 2016 Refusing to give in i checked the plugs again and all were good,so i went to the carby again and yep no fuel or very little was in the rear bowl ,so after another adjustment to bring it up to just trickling out when the car is rocked ,took it for a test drive and all seems good ,the fluttering and coughing must have been due to too much air and no fuel ? Share this post Link to post Share on other sites
cpe351 3 Posted October 18, 2016 It's a Holley thing they never hold tune,,, LOL,,,,you might find the secondary needle and seat sticking was your issue, had this same thing happen in a 600,,, did it twice,replaced the needle and seat and never did it again 2 bear351c and CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted November 6, 2016 yep it did it again,it could be boiling the fuel after the engine is turned off lowering the bowl level but it doesnt run hot,i checked the needle and seat all seems good but i am going to sought this crap out ! Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted November 8, 2016 ok i have been sent a few needle and seats,gaskets ,so i will give it a go. Share this post Link to post Share on other sites
CHESTNUTXE 7,308 Posted November 11, 2016 i was told it could be a hole in the float causing it to go all over the place, nope she is empty. Share this post Link to post Share on other sites