engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rsmustang50 · 07-07-2011, 08:44 PM

I have been working on this truck for 2 year. Now ready to junk it. I have a 350 with edlebrock intake 1406 carb new, 300 heads 2.02 valves just got back from machine shop. new plugs and wires. It has hei.

Problem

Engine stalls in gear
Vacumm gauge jumps
Rough idle
Plug wire has fire but number one cylinder is not firing. put 2 set of ac delco plugs

Checked

Vacumm leaks
Timing
Readjusted valves
Played with carb

But nothing is working ready to crush it. Please help me fix this. Thanks in advance.

Blue Rat · 07-07-2011, 09:02 PM

Sounds to me like it needs to be somewhere where someone can take there time an isolate the problems.

rsmustang50 · 07-07-2011, 09:16 PM

it has a new timing set to.

hayhauler71 · 07-07-2011, 10:32 PM

do a compression test in cylinder number 1

clinebarger · 07-07-2011, 10:46 PM

"Vacumm gauge jumps" Broken valve spring, valve to tight, Stuck or Sticking valves?

rsmustang50 · 07-07-2011, 10:52 PM

it has 130 psi.

y5mgisi · 07-07-2011, 10:53 PM

Vacuum leak?

fastwillie 696969 · 07-07-2011, 11:36 PM

timing chain set at what degree maybe a tooth off making run like it has a big thumpy cam ,

rsmustang50 · 07-08-2011, 12:09 PM

i did not degree it. i just lined the marks up. is that wrong?

rsmustang50 · 07-08-2011, 04:40 PM

just pulled timing cover and marks are lined up.

rsmustang50 · 07-08-2011, 05:43 PM

maybe the cam worn out

geezer#99 · 07-08-2011, 05:50 PM

Check for excessive play in the distributor. Pull the cap off and see if you can move the rotor up and down while turning it slightly. While you're in there look at the timing weights and springs. Could be weak or missing springs or broken spring pins.

fleetsidelarry · 07-08-2011, 06:01 PM

sounds like valve adjustment maybe. describe for us how you determined you were on #1 when you set initial timing and started setting valves and the method used to set the valves.

fastwillie 696969 · 07-08-2011, 06:01 PM

did you put it on TDC and replaced the timing chain

rsmustang50 · 07-08-2011, 08:08 PM

i lined the old timing marks up. removed old put the new one on and turn it to make sure they lined up again. got num 1 up on campression stroke done exhaust 1 3 4 8 and intake 1 2 5 7 rotated on turn of the crank and did exhaust 2 5 6 7 and intake 3 4 6 8. the motor ran like crap when i bought the truck so i changed the heads then burn a valve on number 2 cylinder piston okay. had them redone and now this problem.

fleetsidelarry · 07-08-2011, 10:28 PM

Quote:

Originally Posted by rsmustang50

i lined the old timing marks up. removed old put the new one on and turn it to make sure they lined up again. got num 1 up on campression stroke done exhaust 1 3 4 8 and intake 1 2 5 7 rotated on turn of the crank and did exhaust 2 5 6 7 and intake 3 4 6 8.

OK, so you did dot-to-dot then rotated the engine 2 revolutions 'til the dot's were again dot-to-dot to verify alignment. good so far. then next, TDC #1 compression. let me ask, how did you determine it was on the compression stroke?

(please understand these questions are an effort to understand exactly how you proceeded and not any suggestion that you don't know what you're doing)

rsmustang50 · 07-08-2011, 11:08 PM

so found the problem i overtightened number 1 exhuast valve and killed the cam. what is a good cam nice idle with out changing stall. thanks everybody for your help

clinebarger · 07-08-2011, 11:27 PM

Quote:

Originally Posted by rsmustang50

so found the problem i overtightened number 1 exhuast valve and killed the cam. what is a good cam nice idle with out changing stall. thanks everybody for your help

If you wiped out the cam...Its complete overhaul time.

cableguy0 · 07-08-2011, 11:41 PM

more than likely your running problem in the first place was a worn cam. As stated though yank the engine. and tear it down. Cams tend to dump a on of metal onto the crank and will take out the bottom end

GASoline71 · 07-09-2011, 10:13 AM

When you tear it apart... you will need to clean EVERYTHING thoroughly. There will be massive amounts of metal in the engine from a cam lobe going out. Also remember to clean out the oil pan... under the baffle. It will hold a lot of metal.

After a cam goes out like that you can't slap another cam in it and call it good. Or you'll be doing this all over again... very soon.

I do have to ask... what are "300" heads?

Gary

fastwillie 696969 · 07-09-2011, 01:29 PM

Quote:

Originally Posted by GASoline71

When you tear it apart... you will need to clean EVERYTHING thoroughly. There will be massive amounts of metal in the engine from a cam lobe going out. Also remember to clean out the oil pan... under the baffle. It will hold a lot of metal.

After a cam goes out like that you can't slap another cam in it and call it good. Or you'll be doing this all over again... very soon.

I do have to ask... what are "300" heads?

Gary

you ever take a flashlite to oil when removing the oil pan

GASoline71 · 07-09-2011, 02:45 PM

And see all the sparkly bits of metal in it?

Gary

07-07-2011, 09:02 PM	#2
Blue Rat Registered User Join Date: Dec 2010 Location: Arkansas Posts: 608	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire Sounds to me like it needs to be somewhere where someone can take there time an isolate the problems.

07-07-2011, 09:16 PM	#3
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire it has a new timing set to.

07-07-2011, 10:32 PM	#4
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire do a compression test in cylinder number 1 __________________ Fuzzy

07-07-2011, 10:46 PM	#5
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire "Vacumm gauge jumps" Broken valve spring, valve to tight, Stuck or Sticking valves?

07-07-2011, 10:52 PM	#6
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire it has 130 psi.

07-07-2011, 08:44 PM	#1
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire I have been working on this truck for 2 year. Now ready to junk it. I have a 350 with edlebrock intake 1406 carb new, 300 heads 2.02 valves just got back from machine shop. new plugs and wires. It has hei. Problem Engine stalls in gear Vacumm gauge jumps Rough idle Plug wire has fire but number one cylinder is not firing. put 2 set of ac delco plugs Checked Vacumm leaks Timing Readjusted valves Played with carb But nothing is working ready to crush it. Please help me fix this. Thanks in advance.

07-07-2011, 10:53 PM	#7
y5mgisi Second Chance Program Join Date: Jun 2006 Location: Portland, OR Posts: 2,642	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire Vacuum leak?

07-07-2011, 11:36 PM	#8
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire timing chain set at what degree maybe a tooth off making run like it has a big thumpy cam , __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

07-08-2011, 12:09 PM	#9
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire i did not degree it. i just lined the marks up. is that wrong?

07-08-2011, 04:40 PM	#10
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire just pulled timing cover and marks are lined up.

07-08-2011, 05:43 PM	#11
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire maybe the cam worn out

07-08-2011, 05:50 PM	#12
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,785	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire Check for excessive play in the distributor. Pull the cap off and see if you can move the rotor up and down while turning it slightly. While you're in there look at the timing weights and springs. Could be weak or missing springs or broken spring pins.

07-08-2011, 06:01 PM	#13
fleetsidelarry Senior Car Nut Join Date: Jan 2008 Location: shellman bluff, GA Posts: 1,411	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire sounds like valve adjustment maybe. describe for us how you determined you were on #1 when you set initial timing and started setting valves and the method used to set the valves. __________________ Larry

07-08-2011, 08:08 PM	#15
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire i lined the old timing marks up. removed old put the new one on and turn it to make sure they lined up again. got num 1 up on campression stroke done exhaust 1 3 4 8 and intake 1 2 5 7 rotated on turn of the crank and did exhaust 2 5 6 7 and intake 3 4 6 8. the motor ran like crap when i bought the truck so i changed the heads then burn a valve on number 2 cylinder piston okay. had them redone and now this problem.

07-08-2011, 11:08 PM	#17
rsmustang50 Registered User Join Date: Mar 2008 Location: greensboro n.c Posts: 13	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire so found the problem i overtightened number 1 exhuast valve and killed the cam. what is a good cam nice idle with out changing stall. thanks everybody for your help



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07-08-2011, 11:41 PM	#19
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: engine stalls when put in gear, vacumm jumping, rough idle,num 1 cylinder no fire more than likely your running problem in the first place was a worn cam. As stated though yank the engine. and tear it down. Cams tend to dump a on of metal onto the crank and will take out the bottom end __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

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