Easy cold start, hard hot start - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 08-10-2008, 01:30 PM
80 SS El Camino
 
Last photo:
Join Date: Jun 2008
Location: USA!
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Easy cold start, hard hot start

Hey guys,
My SBC seems to crank within seconds when cold, no matter how long it has sat. If I run it to work, errands ect.. it takes forever to crank over. My guess is the wrong type of plugs or something simple like that. It has HEI and the battery and alt. are fine. Any ideas on why after the engine is at operating temp it just want to crank on and on for a while until it kicks over?

Thanks
Darrin

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-10-2008, 01:35 PM
Luiz's Avatar
ChevyNut
 
Last photo:
Join Date: Feb 2008
Location: Brasilia, DF, Brazil
Posts: 72
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Maybe the solenoid gets hot. When it cools down the starter spins freely enough to start the engine. It seems to be a common problem with small block Chevys.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-10-2008, 01:36 PM
Registered User
 
Join Date: Aug 2008
Location: Michigan
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I am not going to speak of your problem specifically but I have seen that similar problem happen alot when they can't get the car to restart when it is hot, and that tends to be because the starter motor is going bad. I am not sure of all the mechanics of why the starter goes, but typically a new starter cures the problem for me
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-10-2008, 01:37 PM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: USA
Posts: 1,172
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
IMO fuel not ignition.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-10-2008, 01:45 PM
Luiz's Avatar
ChevyNut
 
Last photo:
Join Date: Feb 2008
Location: Brasilia, DF, Brazil
Posts: 72
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sometimes a Ford remote solenoid, that is located far from the hot areas of the engine is the solution for the Chevy hot starting problem.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-10-2008, 01:47 PM
80 SS El Camino
 
Last photo:
Join Date: Jun 2008
Location: USA!
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Luiz
Maybe the solenoid gets hot. When it cools down the starter spins freely enough to start the engine. It seems to be a common problem with small block Chevys.
I haven't noticed the engine spinning much slower when hot but I really haven't payed attention to that........ yet.........

I will do that, do you think moving the solenoid will help?

Darrin
\

Never mind, I see the post just above mine, thanks!
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-10-2008, 03:11 PM
80 SS El Camino
 
Last photo:
Join Date: Jun 2008
Location: USA!
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I just did an exhaustive search on hot start problems and found the Mad Electrical "Start'M up kit" here is a cut and paste.
http://www.madelectrical.com/catalog/st-1.shtml

(2) SLOW CRANKING, a gr-r-runt, gr-r-runt. This kit won't fix it! You'll need to work with ignition timing, battery cables, the starter, and the rest of the system.

So I'm back to square 1. My timing is sitting at 10 deg, should I try backing it off or advancing it more? Again, this only happens at operating temp, not when cold.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-10-2008, 03:17 PM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: USA
Posts: 1,172
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
If the ignition doesn't have enough oomph to make her pop, install an MSD-6.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-10-2008, 04:58 PM
Jmark's Avatar
Registered User
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,808
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
You say that when hot, it CRANKS AND CRANKS, personally, i'd rule out any kind of starter or solonoid problem. It's fuel related and very common when hot engines sit for a while. It's called "hot soak".
The fuel bubbles in the bowl and dribbles down the primary nozzles flooding the engine.

There are a few things that may help.

Make sure the float level is right. What kind of carb is it?

Make sure the needle and seat are good and not letting fuel leak by and overfill the bowl.

Make sure the engine is not running overly hot.

Just for grins, next time you go somewhere, if you can, pull up, shut it down and then raise the hood and go do your errands. When you come back, close the hood and try to start it. The extra cooling may lead you in the right direction.

Mark
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 08-10-2008, 07:21 PM
80 SS El Camino
 
Last photo:
Join Date: Jun 2008
Location: USA!
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks jMark
I have to agree with you for the most part. The carb is an Edlbrock performer series.. 600 cfm if I'm not mistaken.
My opinion is it's one of two things

1. The fuel issue you mentioned
2. Wrong type of plug or weak plug wires.

Ill try your suggestion first, that ones free! If no luck Ill beef up to 8mm wires and do some research on plugs. To be honest I just bought this el camino and I have no idea what type of plugs are in it now.
Thanks
Darrin
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 08-10-2008, 08:05 PM
Jmark's Avatar
Registered User
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,808
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Hi Darrin... One other thing. After if finally does start after sitting hot, does it blow black smoke for a second or two?

My truck does that on a quick shut down and re-start. It's HOT here and with the A/C on, under hood temps get up there. Cold, it fires in milliseconds but hot is a different story, black puff every time. I"m just too lazy to mess with it right now.

Mark
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 08-10-2008, 08:12 PM
80 SS El Camino
 
Last photo:
Join Date: Jun 2008
Location: USA!
Posts: 114
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
jMark,
Cant say I've seen any black smoke. The motor is super strong with less than 2K on it. The car is *almost perfect* for an 80 El Camino. If not for the embarrassing hard start it would that much closer.
I'll keep my eye out for the smoke and any other symptoms, meanwhile, I'll be sweating my @%% off here in NC until it gets a little cooler!
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 08-10-2008, 08:15 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,363
Wiki Edits: 31

Thanks: 2
Thanked 55 Times in 51 Posts
I have a '65 Rambler with a 196 6cyl and a B/N NOS carb, does the same thing. except in my case, it's just a common problem with that carb ( Carter RBS 1bbl ).. 2 pumps of the gas when it's cold and it fires right off. or a quick restart after shutdown, but any length of sitting and the gas in the bowl soaks the heat
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 08-11-2008, 05:08 AM
Luiz's Avatar
ChevyNut
 
Last photo:
Join Date: Feb 2008
Location: Brasilia, DF, Brazil
Posts: 72
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by dedub
I haven't noticed the engine spinning much slower when hot but I really haven't payed attention to that........ yet.........

I will do that, do you think moving the solenoid will help?

Darrin
\

Never mind, I see the post just above mine, thanks!
Well, maybe it'd be necessary to check the condition of the starting system and timing first. If everything is OK, maybe a remote Ford solenoid will do.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 08-11-2008, 07:42 AM
Holder350's Avatar
Auto Parts Professional
 
Last photo:
Join Date: Feb 2005
Location: Whitesburg, TN
Posts: 1,037
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
just remember if it is a hot soak issue there are plenty of heat insulating spacers for carbs.

On a side note....my camaro has a cheapo $25 battery on it, and it spins fine.

All I had to do was put the coil on a toggle switch so that I could turn it off, start cranking to get fuel into the cyls and then flip it on! Otherwise, it will NOT crank cold because of the timing.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Car Hard to start?? HotRodMan Engine 7 03-12-2004 10:26 PM
Cold start problem CorvetteSteve Engine 1 04-14-2003 05:08 PM
Hot start problem-Not starter related Catalina Engine 4 11-13-2002 04:54 PM
hard starting when hot..fine when cold, suggestions? HotRodF100 Engine 10 04-16-2002 08:24 PM
Hard Start Question Jim Weeks Engine 6 03-19-2002 04:30 AM


All times are GMT -6. The time now is 03:40 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.