Umm Kay, So I decided to fix my already working car. I'm an idiot.

I was trying to hook up my vacuume advance back up. Car started up just fine, gave it a rev, and then it went to ****. It is stupid hard to start now, doesn't idle, slow to rev, no power at all. Was able to just barely get it the 5 blocks to my house.

Attached a video. Take a listen and give me some ideas. The only thing I can think of besides a blown engine, is the advance is stuck in full.

http://vids.myspace.com/index.cfm?fu...oid=1406748898

 

Idles and revs too well to be a blown motor.

Weird sound though. You sure you didn't have a chipmonk caught in your car somewhere. Can you trace when that noise is comming from?

 

Jon that is how my car sounds when ever I do get it started. I should Have it back home sometime tomorrow. Dono what I am gonna do but probaly not much till after winter.

 

Yup, well I don't have many options. This is my DD and my other car is stored for the winter.

 

yea well I picked up a protege for $270 but it needs wheel bearings so I am gonna work on it this weekend. I hope you can get it to work out and hope it not as bad as mine seams. I will let you know how things look when i get mine back.

 

Do a ghetto compression test, if that's ok, start going over your ignition. Fwiw, I've never had my vac advance hooked up with the Mikuni. If you need any more help, call me.

 

Did you hook it up to ported vacuum or manifold vacuum? If you hooked it up to manifold vacuum then it is locked at full advance most of the time.

 

Yup, that would be intake manifold vacuume.

 

That sounds like its detonating to me. Its happened to me before on my SA when I was having carburator problems. Make sure its getting fuel properly, and try tapping on the banjo bolts with a light hammer. If thats not a problem, then the vacuum is hooked up wrong, and making it mixed too much air.

 

Does it get better if you disconnect the vacuum line? I though vacuum advance goes to ported vacuum.

 

+1


First rule of troubleshooting. If its running fine and you make a change, then it runs like crap, undo your last change. Put it back the way it was for starters.

 

The first thing that I did was unhook it. Still ran like crap.

Just finished a cheapo compression test. Looks like rear rotor has a blown seal.


Front Rotor

http://vids.myspace.com/index.cfm?fu...oid=1407198001

Rear Rotor

http://vids.myspace.com/index.cfm?fu...oid=1407208285

 

Damn that sucks. Try some of the trick to get the compression back up.

 

Don't know any tricks once the seal has already gone.

 

Damn Jon, that blows. If you want to rebuild or look into a swap, we can work something out. Get your cash together and find some vacation time. Time for a street port and a 5 speed. If you don't have my #, PM me.

 

I can't view your links right now, so I don't know what your compression was at. However, I'll still throw this out there for you. Since you were working in the vicinity of the dizzy, is it possible that the leading ignitor has been disconnected? This would lead to rough running, and maybe some carbon buildup in the apex seals which would result in low compression readings. Just a thought. Good luck either way.

 

I have to agree. When my brother lost his rear rotor he drove it home. he couldnt rev it over 4000rpm because the sound was 10x higher.

 

Unfortunately, I dont have ignitors anymore. I swapped over to MSDs. They are still testing good. My ghetto compression test was just to remove a spark plug and crank it. You can definately hear the diference on the rear rotor.

 

 

try 2 turn the engine backwerds?

 

And that will do what? It won't repair his seal, did you listen to his vids?

 

sry trochoid im runin on 56K. i have heard of people trying that and it bumps the seal back in. my buddy had a 2nd gen that would rev up 2 7-8K but the rear rotor had hardly any compresion. sounds bad man i hope you can get somthin done.

 

That sounds scary. I would think that would do more damage to the housing than acutally fix it...........

 

Anyone have a hypothesis on how jonjon's rear rotor lost it?

I'll admit I'm a newb. Maybe he just really over revved it, I don't see how it could have happened unless it was a pretty old engine.

 

prob bumped the timing and it detonated on startup. imop