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driving car with vacuum disconnected from dizzy #895432 01/03/11 12:49 PM 01/03/11 12:49 PM
Joined: Jan 2005 Posts: 3,344 Central TX roe OP master
roe OP master Joined: Jan 2005 Posts: 3,344 Central TX	can you damage anything by driving like this for extended periods of time? say highway speeds for 10hrs? car drove fine during the trip and when i pulled into my driveway it started sputtering and died. now it won't stay running in gear unless I 2 foot drive to keep it from dying . I think it may be vacuum related as my power brakes are firmer than normal. kinda like when a booster is going bad. could i have blown some kind of seal inside my booster, and if so would it cause these symptoms? I also have a pretty decent exhaust leak that needs to be sealed where the manifold meets the exhaust pipes. I'll double check my vacuum lines later today thanks roe 1971 Plymouth Satellite 408/904 8 3/4 3.23 SG

Re: driving car with vacuum disconnected from dizzy [Re: roe] #895433 01/03/11 01:35 PM 01/03/11 01:35 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	You won't damage anything. You just won't be getting cruising vacum to the vac advance to advance spark for max economy. I have seen cases where mileage and drivability did improve with the recurved system and the vac inoperable. Make sure that you plug the vac line to the carb though or you will have a vac. leak.

Re: driving car with vacuum disconnected from dizzy [Re: MoparforLife] #895434 01/03/11 05:18 PM 01/03/11 05:18 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	so it made the 10 hrs trip..thats great with only a exhast leak is even better how you like the torque/power of the 360 over the 318??? what kinda MPGs did you get???

Re: driving car with vacuum disconnected from dizzy [Re: MoparforLife] #895435 01/03/11 05:33 PM 01/03/11 05:33 PM
Joined: Sep 2006 Posts: 277 Palmyra, NY 6 63stabamatic enthusiast
63stabamatic enthusiast 6 Joined: Sep 2006 Posts: 277 Palmyra, NY	I had a miss at 1.8-2K with my 440 I could never solve. Found out it went away disconnecting and plugging the vaccum line. I now have a vaccum solenoid installed to switch in it and out, switch it back in for better road mileage. Jim

Re: driving car with vacuum disconnected from dizzy [Re: 63stabamatic] #895436 01/03/11 08:46 PM 01/03/11 08:46 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I had a miss at 1.8-2K with my 440 I could never solve. Found out it went away disconnecting and plugging the vaccum line. Jim Any possibility it was a rotor phasing issue as only vac adv will change rotor phasing position and depending on the stackup of tolerances it may have shifted the rotor just far enough away from the underside of the cap terminal to effect a miss. (rotor phasing and quench are 2 of my personal Mopar related obsessions ) Roe, Might clamp the large vac line from the intake to the booster w a pair of vice grips w something padded in the jaws to protect the hose from the serrations & see if the booster has sprung a vac leak inside. live every 24 hour block of time like it's your last day on earth

Re: driving car with vacuum disconnected from dizzy [Re: RapidRobert] #895437 01/03/11 10:31 PM 01/03/11 10:31 PM
Joined: Jan 2005 Posts: 3,344 Central TX roe OP master
roe OP master Joined: Jan 2005 Posts: 3,344 Central TX	well guys, I sprayed the WD-40 around the intake manifold and didnt get any kind of responce for the motor. I went around the entire intake mating surface about 3 times and still nothing. Its dark now so Im going to clean that oil pooling up tomorrow and see if I can pinpoint where its leaking from. I also sprayed all around the carb mating surface with no luck. I'll try plugging the vacuum line to the booster tomorrow as well, and inspect and trace every vacuum line. It definately seems like a vacuum leak though. I even pulled the hose off the manifold to purposely make a vacuum leak and the response was the same as what Ive been seeing, only worse because it was a larger vac leak, instead of just a small one. One interseting thing I noticed today however was that it seems worse when the car is cold. As it warms up it gets better. I thought that would be the other way around. My ehauast leak is pretty bad, on both sides. I used the 360 manifold which have bigger connections to the exhaust pipe. So to make it work I cut the 318 pipe flanges off, and used exhaust clamps and adapters to connect everything temporarily up for the drive here. It wasn't before, but its leaking pretty bad at the adapters now. Could this play a role? 1971 Plymouth Satellite 408/904 8 3/4 3.23 SG

Re: driving car with vacuum disconnected from dizzy [Re: scratchnfotraction] #895438 01/03/11 11:11 PM 01/03/11 11:11 PM
Joined: Jan 2005 Posts: 3,344 Central TX roe OP master
roe OP master Joined: Jan 2005 Posts: 3,344 Central TX	Quote: so it made the 10 hrs trip..thats great with only a exhast leak is even better how you like the torque/power of the 360 over the 318??? what kinda MPGs did you get??? It was actually about 18 hours of driving, I just said 10 to imply it was a long drive. Car drove beautifully the whole way here. I can definately tell its stronger than my tired 318 2bbl, but because its backed by the tired stock 904 with a shot trans mount (will be changed soon) I havent really gotten on it. Well I never really tracked the milage too closely but I think it did really well even with the vacuum advance disconnected. It was better on gas than my old 318 that was in a black car that was exactly like my sig car. That car would use an entire tank of gas in a 1 1/2 hr drive. The 360 was going about 2 1/2 to 3 1/2hrs and still had at least 3-4 gallons left in it going by how much I was paying to fill up at each stop. My gas guage doesnt work so I would just stop when I felt it was time, and it was never near empty. It took about $50 to fill up my first tank, and each one after that was normally around $37 so there were a few gallons left in it. 1971 Plymouth Satellite 408/904 8 3/4 3.23 SG

Re: driving car with vacuum disconnected from dizzy [Re: roe] #895439 01/04/11 08:45 AM 01/04/11 08:45 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	you sure wont hear that often...360 better on gas than a 318,but in your case any newer engine over a worn engine is a good deal all around make sure all the vac ports on the carb are plug or used,ez to over look them,some times they are hidden and hard to see are you running points or elect on it? 72 was points correct?

Re: driving car with vacuum disconnected from dizzy [Re: roe] #895440 01/04/11 09:13 AM 01/04/11 09:13 AM
Joined: Dec 2010 Posts: 70 very Southern Indiana S skullbucket member
skullbucket member S Joined: Dec 2010 Posts: 70 very Southern Indiana	Quote: can you damage anything by driving like this for extended periods of time? say highway speeds for 10hrs? car drove fine during the trip and when i pulled into my driveway it started sputtering and died. now it won't stay running in gear unless I 2 foot drive to keep it from dying . I would say you set the timing with the dist vacuum hooked to full vacuum. Leave the vacuum line unhooked and plug the port on the carb and set your timing to 15 degrees at idle with a timing gun and it should run fine and set your carb idle to where you want. I never use vacuum to the dist and I have total advance of 38 at 2500RPMS.

Re: driving car with vacuum disconnected from dizzy [Re: scratchnfotraction] #895441 01/04/11 05:04 PM 01/04/11 05:04 PM
Joined: Jan 2005 Posts: 3,344 Central TX roe OP master
roe OP master Joined: Jan 2005 Posts: 3,344 Central TX	Quote: you sure wont hear that often...360 better on gas than a 318,but in your case any newer engine over a worn engine is a good deal all around make sure all the vac ports on the carb are plug or used,ez to over look them,some times they are hidden and hard to see are you running points or elect on it? 72 was points correct? Yeah, I figured that my milage would be pretty good with a fresh engine instead my old tired one. I will double check all my vacuum ports and lines in a few minutes. And yes Im running points, in a reman dizzy from autozone. I will check that out as well. 1971 Plymouth Satellite 408/904 8 3/4 3.23 SG

Re: driving car with vacuum disconnected from dizzy [Re: roe] #895442 01/04/11 05:49 PM 01/04/11 05:49 PM
Joined: Jul 2006 Posts: 4,179 California mickm master
mickm master Joined: Jul 2006 Posts: 4,179 California	what do you mean by disconnected? if the hose was not connected to the vacuum advance, then you were sucking air into that hose and into the carb, basically a vacuum leak.

Re: driving car with vacuum disconnected from dizzy [Re: mickm] #895443 01/04/11 05:54 PM 01/04/11 05:54 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: what do you mean by disconnected? if the hose was not connected to the vacuum advance, then you were sucking air into that hose and into the carb, basically a vacuum leak. Already addressed above but yes the hoe to the carb must be lugged but the one to the distributor makes no difference. Maybe repeating is what needs to be done.

Re: driving car with vacuum disconnected from dizzy [Re: mickm] #895444 01/05/11 04:20 AM 01/05/11 04:20 AM
Joined: Jan 2005 Posts: 3,344 Central TX roe OP master
roe OP master Joined: Jan 2005 Posts: 3,344 Central TX	Quote: what do you mean by disconnected? if the hose was not connected to the vacuum advance, then you were sucking air into that hose and into the carb, basically a vacuum leak. Thats what happened. It was conncted to the carb but not the dizzy. I dont know how long it was like that, b/c I connected it after setting the timing IIRC 1971 Plymouth Satellite 408/904 8 3/4 3.23 SG

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