Check your vacuum advance. It may be hanging up. There should be a little rubber sleeve over the portion that hooks into breaker plate. I had a 400 that this rubber tube deteriated in and the car would run very erratic. Drove me crazy until I found the problem. Replaced vacuum advance unit, problem gone. gm66
--- [EMAIL PROTECTED] wrote: From: "Jim H. Thompson" <[EMAIL PROTECTED]> To: "The Chevelle Mailing List" <Chevelle-list@chevelles.net> Subject: Re: [Chevelle-list] Timing? Date: Wed, 27 Sep 2006 18:41:09 -0400 I have set timing manually by setting the timing marks with the engine off. Once they are aligned. Remove the number one plug wire insert a spark plug; lay it on the exhaust so it is grounded. Loosen the distributor slightly and gently turn the distributor back and forth until the plug fires. Once it fires lock the distributor down. Start the engine check timing if the timing jumps around or after restarting a couple of times it changes you have a bad timing chain. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Pelle Andersson Sent: Wednesday, September 27, 2006 1:30 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Timing? I'll try that! Right now I'm "all over the place" & need to recond my carb first. As my father used to say "first things first" ;-) There's a lot of stuff that's been unattended since 70's and if I change one thing another one is bound to break, you know "the weakest link", "chain reaction" type scenario!? I'm having a hard time keeping up with her needs (like my GF) ;-) Pelle ----- Original Message ----- From: Matthew Post <mailto:[EMAIL PROTECTED]> To: The Chevelle Mailing List <mailto:Chevelle-list@chevelles.net> Sent: Wednesday, September 27, 2006 5:24 PM Subject: Re: [Chevelle-list] Timing? What I have always done when adjusting the timing for auto. cars is to set the idle in park at the speed you want it in drive. Set the timing at the "in drive" idle speed while the car is safely in park. Also adjust the idle mixture this way. Then, increase the idle speed enough to get the desired idle when you drop it in to drive. -Matt At 07:46 AM 9/27/2006, you wrote: At first I did the timing as you described (in neutral/park) and I adjusted it to approx 12*. Thats the way Ive always done it before until I read that Watson guide and thought maybe I had problems with the engine stalling when I put in drive which got better when I adjusted the timing The Watson way. I checked the timing with the car in drive and It actually changes, quite a lot, 10-15*! I had all vacuum plugged & did it by the book both times except for the neutral vs drive adjustment procedure. Maybe its the centrifugal advance thats haunting me? When the RPM drops the advance drops too much and it stalls? Ill double check the timing again and compare the difference between drive/neutral adj. procedure. Pelle _____ Från: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] För Shawn Price Skickat: den 27 september 2006 14:31 Till: The Chevelle Mailing List Ämne: Re: [Chevelle-list] Timing? Well, the guide looks good for the most part, but honestly, try this test with the vacuum advance disconnected and plugged... Set your initial timing (around 12* BTDC) with the car in park or neutral. Then have someone sit in the car hold the brake and put it in gear, and check the timing again. If the timing has changed let me know, I'll be surprised. I also sent an email to Craig Watson, the co-author of the guide asking him if there is a specific reason he mentions this technique. Maybe I'll learn something new after all! -- Shawn '69 Corvette 427 4-Speed '69 Chevelle SS 396 4-Speed '69 Charger R/T 383 4-Speed '67 Chevy C-10 3-On The Tree '00 Suzuki GSX-R 750 1-Down, 5-Up On Sep 27, 2006, at 8:10 AM, Pelle Chevelle wrote: Guess I was right from the beginning then :-/ Or have I misunderstood the guide? http://www.2quicknovas.com/happytiming.html Pelle _____ Från: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] För Shawn Price Skickat: den 27 september 2006 14:05 Till: The Chevelle Mailing List Ämne: Re: [Chevelle-list] Timing? Never heard of that guide, and never heard of setting timing in drive. When you set initial timing with the distributor hooked up, it won't make any difference what gear the transmission is in. It is a simple relationship of the firing mark for the #1 cylinder to top dead center of #1 cylinder. Engine load or even speed (not taking into account for distributor advance weights) will not change that relationship. Does the guide give any reason why it needs to be in drive? What do they suggest for a manual car? On Sep 27, 2006, at 7:56 AM, Pelle Chevelle wrote: I read the Watson guide to happy timing and the stated that the timing should be set in Drive!? Pelle _____ Från: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> [ mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] För Shawn Price Skickat: den 27 september 2006 13:46 Till: The Chevelle Mailing List Ämne: Re: [Chevelle-list] Timing? You should set initial timing with the car at operating temperature and in park. Make sure you disconnect the distributor and plug the vacuum port on the carb. -- Shawn '69 Corvette 427 4-Speed '69 Chevelle SS 396 4-Speed '69 Charger R/T 383 4-Speed '67 Chevy C-10 3-On The Tree '00 Suzuki GSX-R 750 1-Down, 5-Up On Sep 27, 2006, at 7:34 AM, Pelle Chevelle wrote: _____________________________________________________________ Netscape. Just the Net You Need.
