hard starting after warmed up? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

willow72 · 11-28-2003, 01:37 PM

i have a 350 vortec crate motor it starts fine in the mornings or after it sits about an hour but if i drive it up to the store and try to run in and out it acts like the battery is about dead i just put a new starter on thinking this would fix the problem but it didnt timing seems to be right the starter i put on is one of those gear reduction high torq starter any help would be great

jef5150 · 11-28-2003, 01:47 PM

when you say replace starter,did you replace the soleniod also?did you replace the battery cables w/starter?????

jhwkns · 11-28-2003, 01:49 PM

Welcome to the board! Try disconnecting the ignition, and then rolling the motor over with the starter. If it rolls over normally, it's not a starter problem, but an ignition problem instead. Make sure all of your cable, and battery connections are clean. Good luck.

willow72 · 11-28-2003, 02:14 PM

yes i did replace the solenoid and cabels as well

ljbear · 11-28-2003, 02:20 PM

How hot is it getting? My wife had a 65 Mustang that used to do this, turned out to be a cooling problem. The radiator cap wasn't holding enough pressure, and as soon as she turned it off it would over heat. Cold starting was fine.

*Randy70C-10* · 11-28-2003, 02:27 PM

You running headers? They sometimes have the tendency to do that. You may just need some header-wrap or a heat shield.

**old Rusty C10** · 11-28-2003, 03:07 PM

sounds like ya need a heat shield there

jku72 · 11-28-2003, 03:13 PM

My 68 burb did that when I first got it. I ended up discovering that I had the timing advanced a little too much. When it was cold, no problem, but hot, forget it.

jorgensensc · 11-28-2003, 03:27 PM

Mine was doing something similar. It had a new starter and soleniod and cables. I ended up getting an Optima red top battery (the battery that was in there was new, but it was a Costco battery) and the problem was solved and never came back again.

willow72 · 11-28-2003, 03:54 PM

thats what im doing right now waiting for my optima battery tobe deliverd

shuttermutt · 11-28-2003, 06:42 PM

Quote:

Originally posted by willow72
i have a 350 vortec crate motor it starts fine in the mornings or after it sits about an hour but if i drive it up to the store and try to run in and out it acts like the battery is about dead i just put a new starter on thinking this would fix the problem but it didnt timing seems to be right the starter i put on is one of those gear reduction high torq starter any help would be great

Okay, when the engine's hot it still cranks, but slowly, right? That's not the solenoid, but much more likely the timing is too far advanced for the engine's liking. You say the timing is right, but what's it actually set at?

I've always timed my Chevy V8's by advancing them until they either A) start to detonate (ping) and/or B) are hard to start when hot. Sure, I could set 'em to what the book says, but every engine is different. I've had some that would let me get away with 14 degrees and others that wouldn't take more than 10.

Either way, I'll be a gen-u-wine dollar bill that's the problem.

Eddie H. · 11-28-2003, 10:19 PM

When I worked at the Chevy dealer , many years ago. This was a
common problem.
Gm had a heat shield we used to put on that goes around the solenoid.
I don't know if they're still available or not?

willow72 · 11-29-2003, 06:14 PM

my timing is set at 9 degrees before top dead center is that about right the specs say it should at 10 degrees anymore help out there

11-28-2003, 01:37 PM	#1
willow72 Registered User Join Date: Nov 2003 Location: dallas/ftwoth Posts: 112	hard starting after warmed up? i have a 350 vortec crate motor it starts fine in the mornings or after it sits about an hour but if i drive it up to the store and try to run in and out it acts like the battery is about dead i just put a new starter on thinking this would fix the problem but it didnt timing seems to be right the starter i put on is one of those gear reduction high torq starter any help would be great

11-28-2003, 01:49 PM	#3
jhwkns Registered Cruiser Join Date: May 2002 Location: Las Vegas NV Posts: 2,230	Welcome to the board! Try disconnecting the ignition, and then rolling the motor over with the starter. If it rolls over normally, it's not a starter problem, but an ignition problem instead. Make sure all of your cable, and battery connections are clean. Good luck. __________________ I intend to live forever. So far, so good.

11-28-2003, 02:20 PM	#5
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	How hot is it getting? My wife had a 65 Mustang that used to do this, turned out to be a cooling problem. The radiator cap wasn't holding enough pressure, and as soon as she turned it off it would over heat. Cold starting was fine. __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

11-28-2003, 03:07 PM	#7
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	sounds like ya need a heat shield there __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

11-28-2003, 03:13 PM	#8
jku72 Registered User Join Date: Jan 2002 Location: cornville, maine Posts: 659	My 68 burb did that when I first got it. I ended up discovering that I had the timing advanced a little too much. When it was cold, no problem, but hot, forget it. __________________ jku Cornville, Maine 68 C10 burb 42 Willys MB 46 Dodge WF-32 1.5 ton 53 & 56 Olds' 60 Cadillac 22 Dodge Brothers

11-28-2003, 01:47 PM	#2
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	when you say replace starter,did you replace the soleniod also?did you replace the battery cables w/starter?????

11-28-2003, 02:14 PM	#4
willow72 Registered User Join Date: Nov 2003 Location: dallas/ftwoth Posts: 112	yes i did replace the solenoid and cabels as well

11-28-2003, 02:27 PM	#6
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	You running headers? They sometimes have the tendency to do that. You may just need some header-wrap or a heat shield.

11-28-2003, 03:27 PM	#9
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Mine was doing something similar. It had a new starter and soleniod and cables. I ended up getting an Optima red top battery (the battery that was in there was new, but it was a Costco battery) and the problem was solved and never came back again. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

11-28-2003, 03:54 PM	#10
willow72 Registered User Join Date: Nov 2003 Location: dallas/ftwoth Posts: 112	thats what im doing right now waiting for my optima battery tobe deliverd

11-28-2003, 10:19 PM	#12
Eddie H. Registered User Join Date: Mar 2001 Location: Paradise TX USA Posts: 1,200	When I worked at the Chevy dealer , many years ago. This was a common problem. Gm had a heat shield we used to put on that goes around the solenoid. I don't know if they're still available or not? __________________ "Negative people always seem to have a problem for every solution"

11-29-2003, 06:14 PM	#13
willow72 Registered User Join Date: Nov 2003 Location: dallas/ftwoth Posts: 112	my timing is set at 9 degrees before top dead center is that about right the specs say it should at 10 degrees anymore help out there



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