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Re: A couple 'issues' I'd like some advice on. [message #270941 is a reply to message #270901]

Sun, 01 February 2015 09:05

kerry pinkerton

Messages: 2565
Registered: July 2012
Location: Harvest, Al

Karma:

Senior Member

Chuck, I have not yet done the aerosol spray test for vacuum leaks, I will do that tomorrow as well as Larry's pinch test. Weather is going to be crappy today.

The plugs are new Bosch Platinum that Dick P recommended. I forget the gap. When I did the compression test, all the plugs looked good. A nice tan shade.

Running off another fuel source isn't really feasible. It might not happen in 200 miles.

Appie, I'll check the voltage on the distributor wire. The module might cause the cough but not the vacuum issue. I'm thinking they may be related....or not... Embarassed

Kosier wrote on Sat, 31 January 2015 23:02

I think your hot idle mixture is way too rich. I would turn the idle mixture screws in, while watching the vacuum gauge to see if
that won't improve things.

I was wondering the same thing Gary and was reading up on understanding Air Fuel Ratios last night.

Kosier wrote on Sat, 31 January 2015 23:02

... but is it possible you got distracted and set the timing chain to the retarded position instead of advanced....

Well I hope not Gary but I'll be honest, I'm not 100% sure now. I certainly THOUGHT I matched the right simbols on the gears. I wish I had taken a photograph.

James Hupy wrote on Sat, 31 January 2015 23:17

Kerry, I have a great deal of experience with cam timing. If you advance the timing, you should notice the vacuum will be higher at a slightly lower
rpm. If you retard it, you should notice the vacuum higher at a slightly
higher one. The maximum vacuum should not be any higher than it would be
with the timing straight up. Unless you have a camshaft that is quite a bit
different than the stock Olds cam. I am just guessing here because I don't
know what cam you indeed have. If you know the spec's, it would help me be
more exact....

Jim and Gary, I appreciate your 'been there-done that' insight. The engine has the stock 403 cam. There is less than 70K miles on the engine and less than 5K since the overhaul. I am 'almost' sure the cam is in right...almost. But that almost is driving me nuts to the point. Almost to the point that I will pull the timing cover off to check. Embarassed

Jim, your explanation of the vacuum readings is exactly what I expected. I contacted Jerry Work who has an advanced cam in his motor and he told me that they did nothing to the engine/carb/distributor. Basically just lowered the torque curve...free power.

The engine FEELS stronger but now I'm not sure. Dick P told me that the engine would feel very flat if I had gotten it backward and it's definitely not that. Running 65-70 is no problem and she climbed the hills in North Alabama just fine.

Is there an way to check the timing without pulling the timing cover off?

I appreciate everyone's thoughts and inputs.

Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L

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[Message index]

		A couple 'issues' I'd like some advice on. By: kerry pinkerton on Sat, 31 January 2015 19:55
		Re: A couple 'issues' I'd like some advice on. By: roy1 on Sat, 31 January 2015 20:09
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: Nelson on Sat, 31 January 2015 20:46
		Re: A couple 'issues' I'd like some advice on. By: C Boyd on Sat, 31 January 2015 21:22
		Re: A couple 'issues' I'd like some advice on. By: Larry on Sat, 31 January 2015 22:11
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: Kosier on Sat, 31 January 2015 23:02
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: Bullitthead on Sun, 01 February 2015 00:32
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: James Hupy on Sat, 31 January 2015 23:17
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: ljdavick on Sun, 01 February 2015 01:28
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: appie on Sun, 01 February 2015 01:42
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: powwerjon on Sun, 01 February 2015 01:46
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: ljdavick on Sun, 01 February 2015 02:32
		Re: A couple 'issues' I'd like some advice on. By: kerry pinkerton on Sun, 01 February 2015 09:05
		Re: A couple 'issues' I'd like some advice on. By: C Boyd on Sun, 01 February 2015 09:27
		Re: A couple 'issues' I'd like some advice on. By: kerry pinkerton on Sun, 01 February 2015 09:55
		Re: A couple 'issues' I'd like some advice on. By: Larry on Sun, 01 February 2015 10:10
		Re: A couple 'issues' I'd like some advice on. By: JohnL455 on Sun, 01 February 2015 20:45
		Re: A couple 'issues' I'd like some advice on. By: Bullitthead on Sun, 01 February 2015 23:48
		Re: A couple 'issues' I'd like some advice on. By: Gadabout on Mon, 02 February 2015 02:20
		Re: A couple 'issues' I'd like some advice on. By: jhbridges on Mon, 02 February 2015 09:00
		Re: [GMCnet] A couple 'issues' I'd like some advice on. By: Mr ERFisher on Mon, 02 February 2015 09:10
		Re: A couple 'issues' I'd like some advice on. By: kerry pinkerton on Wed, 04 February 2015 07:17
		Re: A couple 'issues' I'd like some advice on. By: spiffycar on Thu, 05 February 2015 03:21
		Re: A couple 'issues' I'd like some advice on. By: spiffycar on Thu, 05 February 2015 04:35
		Re: A couple 'issues' I'd like some advice on. By: mild bill on Thu, 05 February 2015 20:27

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