Bike will start and warm up fine. after riding till its up to operating temp (running fine) no missing , or other problems, if you shut it down, it wont start back up- it just pops, and backfires. only way...
Seems as I've answered this question before. I hope I haven't answered for you already because if I did, the information I gave you didn't work.
First off, you've got to determine why the engine is not starting. An engine needs three things to run. Compression, Ignition, and fuel. Since it's doubtful that your compression has just went away without some catastropic event taking place, that leaves ignition and fuel. So, we have to determine which is the culprit.
Ignition, if you or a friend has a spare spark plug, pull a spark plug wire off a plug and put the spare plug in there. Hold the spark plug firmly gournded to the engine and try to start the engine. Watch the plug to see if you're getting a spark. If you are, proceed to the fuel checks. If not, you need to deternine why not. Since you said you replaced the coil, did you put the correct coil on the bike? Using an ohm meter, disconnect the wires from the small terminals of the coil and test the resistance between the two connections of the coil. The primary resistance across the coil should be 3-4 ohms for an electronic ignition like ou your '93 model. If the coil checks good, there is an ignition black box under the triangular plate on the left side of the box. The service manual tells you how to test this unit but you must use the speicific type of meter they use or your readings will be wrong. So, if you're not getting spark, I'd plan on replacement of the ignition unit on the bike.
If you think the problem is fuel related, you need to determine whether you have too little fuel or too much fuel. Remove a spark plug and see if wet and smells like gasoline. If so, you're bike's carburetor is flooding for some reason. It could be the needle valve or the accelerator pump. You might try turning your petcock off when you stop the bike. If this solves the problem, you need to service the carburetor to fix the problem correctly. Rebuild the carburetor. Good Luck.
Mar 26, 2010 |
1993 Harley Davidson XLH Sportster 883