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| bad miss http://woodsbuggy.com/phpBB3/viewtopic.php?f=3&t=15770 |
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| Author: | jesse [ Tue Jul 30, 2013 10:26 pm ] |
| Post subject: | bad miss |
my motor recently started to spit some fire out the exhaust/sputter and pop when its under a load i have not changed anything with the motor it just out the blue started new plugs new ignition new fuel pump checked for intake leaks cleaned jets checked wires for shorts best i could has gas in tank this time  any other suggestions its driving me crazy
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| Author: | holeman [ Tue Jul 30, 2013 10:54 pm ] |
| Post subject: | Re: bad miss |
points or electronic |
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| Author: | jesse [ Tue Jul 30, 2013 10:55 pm ] |
| Post subject: | Re: bad miss |
its a dui distributor |
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| Author: | kevin f [ Tue Jul 30, 2013 11:16 pm ] |
| Post subject: | Re: bad miss |
Check for a bad ignition switch or maybe a short in the wire feeding your ignition or distributor. Take a jumper wire and hot wire the distributor and try it. If it goes away then your problem is one of the two things here. |
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| Author: | jesse [ Wed Jul 31, 2013 12:05 am ] |
| Post subject: | Re: bad miss |
Sorry forgot to mention I put in new switch and wires with a previous issue a couple weeks ago im gonna cueck valves tomorrow after work im running low on ideas |
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| Author: | kevin f [ Wed Jul 31, 2013 7:56 am ] |
| Post subject: | Re: bad miss |
As bad as this may sound, pull the heads and check for a crack between the valves. I've had that same problem before and that was it. Posted using the WoodsBuggy Mobile App |
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| Author: | kevin f [ Wed Jul 31, 2013 9:27 am ] |
| Post subject: | Re: bad miss |
Maybe low float levels? Or low fuel pressure? Posted using the WoodsBuggy Mobile App |
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| Author: | jon williams [ Wed Jul 31, 2013 1:19 pm ] |
| Post subject: | Re: bad miss |
Check your timing I've had my distributor be off after a good hard ride Posted using the WoodsBuggy Mobile App |
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| Author: | Money520 [ Wed Jul 31, 2013 1:34 pm ] |
| Post subject: | Re: bad miss |
As simple ad it sounds check the header gaskets my popped and cracked like crazy an it turned out to have 3 header gaskets blew out |
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| Author: | jesse [ Wed Jul 31, 2013 1:46 pm ] |
| Post subject: | Re: bad miss |
Have done timing no affect also checked exaust sometime yo7 can advancd timing and it will help for a few but then it messes up again |
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| Author: | Aruba1 [ Wed Jul 31, 2013 4:00 pm ] |
| Post subject: | Re: bad miss |
when you say new ignition, what do you mean? Did you put a new distributor? have you tried putting the old wires back on? |
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| Author: | stillwell1 [ Wed Jul 31, 2013 5:21 pm ] |
| Post subject: | Re: bad miss |
We put a davis unified ingnitions distributor in it its a chevrolet dui distributor with the coil in the top milled down for a vw trying to fix the issue and it didnt change u can set timing then run it and timing changes so were running out of options |
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| Author: | Aruba1 [ Wed Jul 31, 2013 5:56 pm ] |
| Post subject: | Re: bad miss |
maybe I am saying the obvious thing but make sure you are at tdc on cyl 1 and not 3. if you are at the right place then install old distributor and see how she does. |
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| Author: | 2800passat [ Wed Jul 31, 2013 7:51 pm ] |
| Post subject: | Re: bad miss |
To me , the 1st sign of spittin and poppin under a load is low compression. It's where your compressed fuel and air escapes and the cylinder becomes too lean to burn correctly under the demanded load. I hope that sounded right. lol Again, All motors should have a vacuum port for a $15 vacuum gauge. Below the butterfly valve! READ UP ON VACUUM TEST! Do it now while you are on your compt! So I can stop beggin yall to do so! |
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| Author: | jesse [ Wed Jul 31, 2013 10:43 pm ] |
| Post subject: | Re: bad miss |
It did the same with the old distributor bought a new one cause I needed one anyway and still same also new wires and im hopeing its not a internal problem dave but it may be im jist going over all the things it could be befor motor comes off or appart |
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| Author: | kevin f [ Wed Jul 31, 2013 10:56 pm ] |
| Post subject: | Re: bad miss |
What do the spark plugs look like as far as color? Run it with it popping and missing and shut down under those conditions. Dont let it go back to idle, just shut it off. The collor of the plugs will tell you alot. |
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| Author: | jesse [ Wed Jul 31, 2013 11:02 pm ] |
| Post subject: | Re: bad miss |
Ok will do that tomorrow and report back |
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| Author: | reno2165 [ Thu Aug 01, 2013 6:26 pm ] |
| Post subject: | Re: bad miss |
jesse is failing to mention that you can set the timing, run/ride it and the timing will change... grab the front pully and turn it and it moves several degrees before the rotor button begins to turn... it has slack in it. not sure anybody knows how long the motor has been together but it is getting tired and time for a tear down 
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| Author: | kevin f [ Thu Aug 01, 2013 8:10 pm ] |
| Post subject: | Re: bad miss |
Yep shes wore out. It either has a crap load of end play or the gear on the crank is shot and loose on the crank. |
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| Author: | jesse [ Thu Aug 01, 2013 8:56 pm ] |
| Post subject: | Re: bad miss |
I said above you can advance timing sometime not always and it will help till you get down on it again me and joehave discused the drive gear but wanted some other suggestions befor I do a rebuild of the motor we wanna cover everything on the out before going in |
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| Author: | jesse [ Thu Aug 01, 2013 8:57 pm ] |
| Post subject: | Re: bad miss |
Also end play is good im afraid its the gear on crank but hope not |
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| Author: | 2800passat [ Thu Aug 01, 2013 10:05 pm ] |
| Post subject: | Re: bad miss |
But did you check the comp. Did you check the comp? Kevin said his did that and it was cracked heads.  That's true! he was loosing comp. With 10 11 12 13 14:1 compression ratio and bad rings valves heads sealing surfaces can't sqeeze it and hold it , where is your 14:1fuel/ air mixture going? all that dynamite is skeeting out a crack and leaving a lean mixture to burn under a load. Lean your motor out and it will pop.
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| Author: | jesse [ Thu Aug 01, 2013 10:48 pm ] |
| Post subject: | Re: bad miss |
I dont habe the ability to at my shop will habe to wait till joes back from kentucky |
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| Author: | Aruba1 [ Thu Aug 01, 2013 11:17 pm ] |
| Post subject: | Re: bad miss |
If you are close to HF they have some compression test kit: http://www.harborfreight.com/catalogsea ... ssion+test Not your high quality gauges but close and consistent enough for a quick check. |
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| Author: | jesse [ Tue Aug 06, 2013 12:30 am ] |
| Post subject: | Re: bad miss |
well did a comp test one side has 30 and the other side is around 60 and it leaks like crazy out the pushrod tubes and where you put your oil in so gonna pull it off and rebuild 
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