Jayden71 Posted November 5, 2011 Report Share Posted November 5, 2011 So my stock carb on my L16 521 was acting up. It was dumping the fuel from the bowl into engine after sitting a few days. Also went from 32mpg to 18! SInstead of messing with it I decided now is a good time to put a weber on. Got brand new manual choke 32/36 weber last weekend. I put it and the offenhauser intake on. Spent all day Saturday tinkering and tuning on it. No vacuum leaks, spark plugs only have 200 miles on em. Advanced the timing just slightly. Got it to run great, very smooth. Idle speed 750 or so. When warm fires right up idles perfect. Let it sit for several hours, still fires right up. Everything seems good. Fast idle and choke and everything works like it should. Fast forward to this morning and its been cold and snowed few inches. 10 degrees F this morning, truck has not run since Sunday, been crankin for 30 minutes and truck absolutely will not start!! Pulled choke and just barely tapped throttle. Just cranks and cranks and cranks..........nothin. Am I missing something?? I understand you don't just throw on a new carb and away you go. When it runs it runs bueatiful!! Is it too much carb for a 210 head?? Do i have to get smaller jets or anything like that?? Engine is pretty fresh, complete rebuild 3 years ago, has about 11,000 miles on it. Any tips would be greatly appreciated. Winters get quite cold here. I do not drive it very much this time of year but I at least like to go out every weekend and let her run for a few minutes. Quote Link to comment
datzenmike Posted November 5, 2011 Report Share Posted November 5, 2011 Could be flooded, so open choke and hold throttle down. Keep in mind that every time you pump the gas the accelerator pump dumps in more gas. So avoid pumping it. Crank till it clears and dries out the cylinders. Quote Link to comment
Jayden71 Posted November 5, 2011 Author Report Share Posted November 5, 2011 Tried that for several minutes............does not want to start. Got it to go once and won't idle and just dies. Something is definately wrong. Im about ready to rebuild stock carb and put it back on :angry: . -20 degrees and it would fire up on first crank. Quote Link to comment
banzai510(hainz) Posted November 5, 2011 Report Share Posted November 5, 2011 I would do this in increments. I would try pull the choke(half) on pump the pedal once . try start then twice so on. then ck for spark at the end of the center coil wire to ground. If you have spark then pull a spark plug. If flooded out then swap new plugs in there and with no choke and gas hopefully it starts up. Then if it does it again I assume its the carb. maybe the float is too high. most time bolt a DGV to a L motor is a botl on . I have never rejetted main jets on a Weber. also ck the intake is tight and the carb is tight. Quote Link to comment
Jayden71 Posted November 5, 2011 Author Report Share Posted November 5, 2011 Its running now but wow!! Thanks for tips guys. When I first cranked it this morning I just pulled choke, no throttle. Cranked it. Nothin, no hint of wanting to start. Intake is tight. There are no leaks. Been doin my reseaerch and reading the Tuning guide in this section. I am running stock coil with EI dizzy. Do i need a better coil?? Get stronger spark? Shes out there runnin like a champ right now. Quote Link to comment
banzai510(hainz) Posted November 5, 2011 Report Share Posted November 5, 2011 MY last 2 weber DGV wre eleltric but I could never get the choke set correctly so I just turn the heater coil back where the choke plate would stay open. I pump a few times to prime the carb and try to start. This works for me. Longer the 521 sits the more it takes to get going I am running stock coil with EI dizzy? What this mean? Stock 521 coil or a Matchbox coil? stock 521 coils need a ballast resisitor in series.Otherwise they get HOT. Matchbox Coil doesn not need a ballast. Quote Link to comment
Sealik Posted November 5, 2011 Report Share Posted November 5, 2011 Its running now but wow!! Thanks for tips guys. When I first cranked it this morning I just pulled choke, no throttle. Cranked it. Nothin, no hint of wanting to start. Intake is tight. There are no leaks. Been doin my reseaerch and reading the Tuning guide in this section. I am running stock coil with EI dizzy. Do i need a better coil?? Get stronger spark? Shes out there runnin like a champ right now. Also check the gaps on the plugs....if old and have a wider gap, not conducive for the colder starts Quote Link to comment
Jayden71 Posted November 5, 2011 Author Report Share Posted November 5, 2011 Stock 521 coil or a Matchbox coil? stock 521 coils need a ballast resisitor in series.Otherwise they get HOT. Matchbox Coil doesn not need a ballast. 521 coil with resistor Quote Link to comment
datzenmike Posted November 5, 2011 Report Share Posted November 5, 2011 That will work but you are only running a pointless set up and not taking advantage of the extra spark power the EI is capable of. I suggest an EI coil and get rid of the ballast resistor. Re-gap the plugs wider 0.038-0.042" to give a longer spark. Quote Link to comment
Laecaon Posted November 5, 2011 Report Share Posted November 5, 2011 My L16 was horrible on cold mornings. Though it started everytime. Pull choke almost completely out, pump gas twice, start. I also have an Offy intake and 32/36. My L18 is alot more finicky, it really hates choke. I have to find a sweet spot where there is not too much and not too little to get it started, but once it has ran for 10 secs it doesnt need the choke anymore. Quote Link to comment
Z-train Posted November 5, 2011 Report Share Posted November 5, 2011 And people ask me why i'm building a FI manifold....... Quote Link to comment
Jayden71 Posted November 5, 2011 Author Report Share Posted November 5, 2011 I guess I'm spoiled with the stock carb. Always fired right up. Full choke pump once and way she went. No matter how cold. So I guess I will just keep playin with it and see whot happenz. Quote Link to comment
Laecaon Posted November 5, 2011 Report Share Posted November 5, 2011 Pretty sure its the manual choke. You just need to figure out how far to pull it. And I have always double pumped with the weber, starts alot easier than 1 pump. Quote Link to comment
Jayden71 Posted November 6, 2011 Author Report Share Posted November 6, 2011 Ok, 23 degrees and snowing this morning. Went out to truck, set fast idle and no choke. She cranked for about 3-5 seconds and fired up. Wouldn't idle on her own for about a minute but, way better than yesterday :thumbup: Thank you for the help guys! I am going to get an EI coil and regap the plugs. I have this nagging feeling that I was gonna do that last winter too :hmm: . Oh yeah I forgot to mention, I plugged in the block heater for an hour before I started her too. Haven't had to do that for 8 months so I kinda forgot aboot it. Quote Link to comment
datzenmike Posted November 6, 2011 Report Share Posted November 6, 2011 I have this nagging feeling that I was gonna do that last winter too :hmm: . .... so I kinda forgot aboot it. Those who don't learn from the past are doomed to repeat their mistakes in the future. Quote Link to comment
metalmonkey47 Posted November 6, 2011 Report Share Posted November 6, 2011 My L20B starts like a champ cold mornings. I'm running all new ignition components on an electric choke Weber. Everything else is stock, down to the points dizzy. Quote Link to comment
Jayden71 Posted November 6, 2011 Author Report Share Posted November 6, 2011 Those who don't learn from the past are doomed to repeat their mistakes in the future. Thanks Mike!! I appreciate the vote of confidence :lol: Quote Link to comment
banzai510(hainz) Posted November 9, 2011 Report Share Posted November 9, 2011 I hope you know what your doing You said stock set up, coil with ballast resisitorputting a EI coil on a point system is not good. get it RIGHT! EI coil only with a Matchbox (no ballast needed) Quote Link to comment
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