brianhayes
Cadet
- Joined
- May 30, 2004
- Messages
- 21
Hello everyone, I wanted to share a current situation with you and get feed back as needed.<br /><br />1) I was out on lake norman last week idling out of the marina and out of no where my engine just died. Opened the throttle and started her back up and when I let the throtle back nearing idle she died again and again. So, in an effort to make everyone happy I did a little on water troubleshooting.<br /><br />What I found was my secondary barrels on my carb was dumping tons of fuel into the intake.<br /><br />So, nowing that I had a stuck fuel bowl I decided to just get her running and just stay running wide open until we got to where we were going.<br /><br />BAD IDEA FYI...<br /><br />2) So thinking back to my days of working on cars and stuff I decided to pull the plugs to check them out and all looked well, so I thought that running in this condition was not hurting the engine as the plugs looked normal.<br /><br />Then when putting the plugs back in I broke one and wouldn't you know it , no spare.<br /><br />After our fun with our dogs on some island, I managed to get her running and we took off and we barley made it back to the marina.<br /><br />Max RPM's 2500 with constant backfiring and stalling.<br /><br />Got home, ordered a rebuild kit for the holley, found the problem (needle seat dirty) and rebuild and installed.<br /><br />Started her up and I had a rough idle.. So, I take her back to the lake to trouble shoot because I feel better on the water when trouble shotting.<br /><br />On the water I opened her up and bam!! No power, I can start up, idle, and nothing. The engine seems to start out great but around 2000 RPM's the engine just losses all power but stays running.<br /><br />I go home, and start from scratch. I pull the plugs to take a peak and there it is. A plug that is almost melted, no gap and what apears to be either extream carbon buildup or meatle melted around the diod (end of plug).<br /><br />Compression test showed that All but this cylnder was 180 psi. This one was 150 psi.<br /><br />So, thinking well 150 is still good, I put the old plugs back in as <br /><br />IMPORTANT.<br /><br />the new ones even though they had almost the same number/make/etc.. where a little longer than the original ones.<br /><br />Idle is now perfect, so I go back to the lake.<br /><br />Perfect, running actually better than originally.<br /><br />I run for about 4 minutes and there it is again. Total loss of power but mantains around 2000 rpms. I then stated pumping the troutle and the engine would stay in the 3000 rpm range.<br /><br />I stop, pull the plugs, plugs look perfectly brownish and this time I bring compression tester.<br /><br />Tested my 150 PSI cylinder and well, now it's 90 PSI.<br /><br />So to get back to the marina, I take off and just keep pumping the troutle just like you would pump an old car to get it started. I just kept doing it and the thing would stay around 3200 rpms.<br /><br />I know this feels like a carb problem, but I am thinking it's a major vacum issue. And having vortec heads I would think they would be even more reliant on vacum.<br /><br />I plan on pulling the head off today, but I think I either burned my exhaust valve when running in a flood condition or broke a ring or both.<br /><br />Talk about making all your mistakes at one time..<br /><br />Brian Hayes
<br /><br />You'll Also have to replace the Exhaust manifolds.......<br />And,<br />Change the Gear Ratio in your outdrive...........<br /><br />Do you have the Extra 8"s(in the forward area of the engine bay) required for the longer motor ???<br />