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Hey guys. Got a little issue and since I am not the best with a wrench I am hoping it is a rookie mistake. Was driving home a few weeks ago and noticed I was getting a lot of backfiring and having trouble keeping the RPM's up. After parking it and just "dealing with it tomorrow" I now can't even get the guy to start up. First I thought it was a carb issue and after a mechanic buddy came by he said it looked like I was not getting a good spark. So, I just replaced the ignition coil, points and condenser and.....nodda. It's rolling but it just won't fire up. I verified good voltage to the ignition coil and now I am kinda running out of ideas. Any thoughts? Of course I thought I would have this fixed right up for one of the last really good convertible weekends. Doahh!

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Could be ignition timing, the back firing sounds a lot like ignition issue.  Got a timing light ?  Or could you get someone to come over and check the timing ?
 
 
Originally Posted by mojogoatlanta:

Hey guys. Got a little issue and since I am not the best with a wrench I am hoping it is a rookie mistake. Was driving home a few weeks ago and noticed I was getting a lot of backfiring and having trouble keeping the RPM's up. After parking it and just "dealing with it tomorrow" I now can't even get the guy to start up. First I thought it was a carb issue and after a mechanic buddy came by he said it looked like I was not getting a good spark. So, I just replaced the ignition coil, points and condenser and.....nodda. It's rolling but it just won't fire up. I verified good voltage to the ignition coil and now I am kinda running out of ideas. Any thoughts? Of course I thought I would have this fixed right up for one of the last really good convertible weekends. Doahh!

Poping and cracking  ?  if it runs fine for about 10 minute or so its a coil .. If it will not crank make sure the idle solenoid is connected .  a single carb has 2 wires from the coil . One to the choke  and one to the idle solenoid on the left side of the carb. 

 

A  spring off of the advance inside the dizy  can cause problems  I have uses GM curve kit springs to fix that use the lightest ones in the kit.  

 

If the dizzy  10 mm bolt got lose and the dizzy slipped up out of the block it will not run.  It has a offset slot simply pop the cap rotate the rotery button lighty pressing down on the dizzy as you do it. until it goes back in . i use  timming light on it to 8 degrees before TDC.. but you can static time it with a test light  

 

Turn the engine  by the alternator bolt until the TDC  notch on the lower pulley  is top center  with the rotor on number one wire plug on the cap. i turn it to the left about one inch. That shoud be close to 8 degrees.

 

Put a test light lead on the coil negative spade and the other lead to the dizzy lead . Losen and turn the dizzy with the key on untill you can make the light flick on and off with just the slightest rotation of the dizzy.  let it just barley be out. and lock down the dizzy.. YOUR TIMMED!

Last edited by oldyeler

I don't have a timing light. Could Napa or someone like that have one? I'm going to pop the filters off the carbs and see if a spray of gas looks to be getting where it needs to be going. Also, (once again please excuse my ignorance) where is the fuel filter located on the VS? Could it possibly be gummed up really bad? Thanks to everyone like always for the help.

If you have spark, it has to be fuel a related problem.....   I had a collapsed fuel filter cause me to chase my tail for almost two weeks....   New fuel lines (steel) and hoses, new electric fuel pump, Rebuild on the DELs, and multiple jet inspections, etc. etc. etc...

 

Finaly checked fuel delivery at the carbs...  Not that good... Hmmmmm....  pulled the hose off the tanks new NAPA filter and the delivery still sucked...   Pulled the hose at the tank and was flooded instantly....  New filter fixed it all...

 

The symptoms were as follows...Turn on ignition, listen for pump, hit the key....  The engine would start ok, and a blip or two seemed good.... Ease it up to the road and try to have a go, the engine starts to spit and backfire with real garbage performance even at speed (when attained)...  This intensified over time as the filter collapsed farther and farther...

 

The fuel system could keep up at idle, but the bowls went dry when you tried to get moving...   Hope this helps...  

You should try using Sta-Bil "Marine Formula Ethanol Treatment" in your gas tank. It is the blue liquid. My idle jets were clogged on my Weber 44's and the car popped, backfired and hesitated when taking off from a stop or at low speed acceleration. I attribute the uncivilized behavior to the addition of Ethanol. Ethanol screws everything up by leaving build up and deposits in the carbs. Follow the instructions on the bottle,let the car sit for a day so that the Sta-Bil can work it's magic. You may want to see if pouring a little gas into the carbs,will get it to run. That would be further evidence of clogged jets.

Holy crap we got it!!!!!!  Looks like it was two different problems. We were having a weak spark so replaced all the plugs and lines and got a solid spark but no stable idle. Pulled the carbs off and one of the mounting bolts had magically came unscrewed and was causing a problem with a good seal so cleaned up the carbs, put 'em back on, adjusted the carbs and the idle with the T-bar and BAM!!! Smooth drive!!!! Just when I was about to throw in the towel. 

 

Thank you EVERYBODY for your help!!! Stay classy!

 

-Chase

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