MantisX620 Posted March 2, 2014 Report Share Posted March 2, 2014 Hoping Ratsun can help on this one. Took my r1 carbed l20 on its maiden voyage and had to call a tow truck. I was driving along and it died on me. Would not start back up. Thought it might be flooded so I waited 20 mins and did the ole floor it and crank. No dice. What do you guys think it could be? I'm still on points ignition. Could it not handle the extra fuel of the R1s? I bought a 78 datsun disti and box on ebay but would rather sort this out before I install that just to be sure.The carbs have 1.8mm main jets and I'm out 3 and a half turns on the idle mixture screws. I'm using the stock fuel pump. Engine is completely stock. I have + on the balIast. I put a test light on the coil and it alternates + and - when cranking and a solid + when just the switch is on. The spark plug wires flash + when I crank it. I even swapeed another points disti off my spare engine with no luck. Verified fuel pump is pumping gas. Should I install the 78 disti and box to be sure its not a spark issue? ThanksMantisX Quote Link to comment
smoke Posted March 2, 2014 Report Share Posted March 2, 2014 Maybe pull a plug and have a look at it, see if it's black or fuel soaked. Quote Link to comment
datzenmike Posted March 2, 2014 Report Share Posted March 2, 2014 If the starter rotates the engine... then it's cranking. It it cranks but doesn't start... it's just not starting. Big difference. Pull the coil wire off and hold near ground and crank it. Spark? Yes or no? If you have spark then it has to be fuel related (too much or too little) If you suspect flooding remove the plugs and dry them. While they are out crank the motor over to dry out the cylinders. Replace plugs and try starting. 1 Quote Link to comment
dr.feltersnatch Posted March 2, 2014 Report Share Posted March 2, 2014 how did you verify spark? did you pull a plug? like smoke said clean or replace your plugs and see how the old one look. Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Haha, sorry Mike, I thought about it right after I hit submit. It wouldnt let me edit the title. I verified spark by taking #1 spark plug out and arcing off the valve cover. I got a blue arc when I did that. I guess its somewhere in the carbs, but what about R1 carbs would make an engine fail to start? I drained the bowls of all 4 looking for any contaminants, nothing. I didnt sync them or anything before heading out but hell they never ran funny either. I guess ill pull them but ill be honest, I dont know what im looking for. I can smell gas when I crank it. The only thing I changed on the carbs were the main jets(1.8s) and the idle mixture screws 3 and half turns out. Thanks all MantisX Quote Link to comment
smoke Posted March 2, 2014 Report Share Posted March 2, 2014 How far did you make it before it quit? Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 I drove it maybe a total of 15 miles. Went about 2 miles from my home and I stopped and put gas in it. The rest of the time I was driving it. Was cruising when it felt like I lost power. All downhill from there. Hasnt started since. Ill also add, it backfired out the exhaust once at the beginning of the trip but I chalked it up to the carbs not being synced. Quote Link to comment
smoke Posted March 2, 2014 Report Share Posted March 2, 2014 And I assume you have a fuel pressure regulator before them? Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Nope, the R1 thread has guys using them with the stock fuel pump without a regulator and running fine. Quote Link to comment
smoke Posted March 2, 2014 Report Share Posted March 2, 2014 Might be an issue though, considering they are made to run off of gravity. Quote Link to comment
smoke Posted March 2, 2014 Report Share Posted March 2, 2014 But then again, you would see fuel coming out the overflow tubes if that was happening. Quote Link to comment
ggzilla Posted March 2, 2014 Report Share Posted March 2, 2014 Don't pull the carbs unless you know what ur looking for. It doesn't sound like carbs to me. You have blue spark while cranking - that is good. Does the engine fire while you are cranking? Does it fire up with a shot of starting fluid? Quote Link to comment
ggzilla Posted March 2, 2014 Report Share Posted March 2, 2014 Could it not handle the extra fuel of the R1s? R1s won't use more fuel if you keep the revs normal (unless somethings wrong). The engine has to draw more air first, which won't happen until really revved up. Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Will pick up some starter fluid tomorrow. It acts like it wants to fire when cranking but never does. Ive tried choking them while it tries as well. Tomorrow if all else fails, im gonna put the 32/36 back just to see if itll start to rule out the R1s. MantisX Quote Link to comment
ggzilla Posted March 2, 2014 Report Share Posted March 2, 2014 Does it fire or not? Fire doesn't mean "start and keep running", it means one or more cylinders spark off. If it runs momentarily on the starting fluid, it indicates a fuel problem. Not necessarily the carbs though - it could be a fuel pump or filter issue. You can test that. If it doesn't run for half a second on the starting fluid, you have other than a carburetor issue. Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Yes there is definitely a fire. It hits once or twice then, back to cranking and repeat. Will report back once I have the starting fluid. Quote Link to comment
dr.feltersnatch Posted March 2, 2014 Report Share Posted March 2, 2014 so it was running fine before you put the fuel in, could there be an issue with that fuel? Quote Link to comment
datzenmike Posted March 2, 2014 Report Share Posted March 2, 2014 Haha, sorry Mike, I thought about it right after I hit submit. It wouldnt let me edit the title. Thanks all MantisX No problem, I fixed it. You should be able to edit the title by selecting EDIT then USE FULL EDITOR to access the title line, make your changes and then SUBMIT. 15 miles would tell me that things are running fairly well. The plugs may have carboned up if running too rich? causing a hard restart. Pull and check/clean them. Another thing is the ballast. It's by passed during start but when key is released it flows through it. If loose wire or open it's just like turning the ignition off. Briefly jumper a wire across the ballast. If it starts up this may be the problem. Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Jumped the ballast with no luck. Im starting to think maybe its not a carb issue because gas is getting to the plugs it seems. So ive shifted to electrical. If I unhook my fusible link, I shouldnt have power anywhere right? In my case, with an unhooked fusible, I can still crank it and all my lights, headlights, wipers, radio etc still work. Also when I tested the spark, it was blue but wasnt very big. Should it be a big very visible spark? MantisX Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 so it was running fine before you put the fuel in, could there be an issue with that fuel? Shouldnt be. I put the same in my turbo integra and it runs just fine. Quote Link to comment
datzenmike Posted March 2, 2014 Report Share Posted March 2, 2014 That is odd. Everything but the starter goes through the fusible link. Sure you have the link? Check the + battery cable to the starter... there has to be another supply jumpered onto it to supply the fuse and ignition switch. Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Pretty sure. So I checked voltage at the fuse box. With the switch on, the left 3 fuses have 12v. The right 3 have 0.05v. Is this normal? Please say no so Ill have something to go off LOL Edit: Scratch that, tested them again and I got 12v......... Maybe my crappy HF voltmeter. MantisX Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Ok more odd shit. Took the b/w wire off the ballast and stuck it directly to + on the coil. It started but idled really low and died. It will do this everytime it starts now. Quote Link to comment
MantisX620 Posted March 2, 2014 Author Report Share Posted March 2, 2014 It fucking runs now? I took the disti loose and just gave it a big clockwise turn(off the pedestal screw hole) and it fired right up. wtf? Quote Link to comment
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