Won't start...Please help - 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 11-14-2005, 05:46 PM
jrm123180's Avatar
A Learning Hobbist
 
Last photo:
Join Date: Feb 2004
Location: NH
Age: 33
Posts: 232
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Won't start...Please help

My 79 Chevy truck w/ a 350 won't start

I've played with my distributor advancing it and retarding it.

I've put 2 different carbs in it.

I've quadrupled checked my wires to be sure they are in the correct firing order.

I had it running the other night, and I grabbed a spark plug wire and got zapped. That triggered me to replace the wires on it. Since I got zapped, I have not been able to start it. Is there something that I could have shorted out possibly?

Please help.

Thanks once again.
Steve

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-14-2005, 05:54 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,654
Wiki Edits: 0

Thanks: 15
Thanked 58 Times in 55 Posts
I`d check and see if it has spark, do a simple spark test. Are you sure you didn`t knock the power wire off?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-14-2005, 06:10 PM
jrm123180's Avatar
A Learning Hobbist
 
Last photo:
Join Date: Feb 2004
Location: NH
Age: 33
Posts: 232
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thats my next step. I'm also going to replace the coil (which isn't that old) and see what happeneds.

I'm checked all my wires to be sure they are in place...not just the spark
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-14-2005, 08:28 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

I'm not sure what your asking...

Do you have NO spark at all, or spark and no start?

Assuming HEI and NOT aftermarket Ignition, Run a wire directly to the battery from the terminal marked "BATT" on the HEI..Crank it, If it fires, and runs you have a secondary Ignition problem..your losing spark (coil power ) during crank cycles.

Next to verify, get a DVOM, set it for V X 50 and have someone crank it..if it has 12 volts on "RUN" and drops to zero in "START" your losing cranking power to the coil.

Go to the solenoid and locate the terminal marked "I" or "R" on it, see if it has a wire, If not look around for a "Stray" and If you can't locate one, add a wire from there to the Wire going to the "BATT" terminal, and parallel it in.

To test your coil, using your DVOM set to R X 1 measure across the primary side, BATT to TACH, It should read less than on ohm..The measure the secondary side, BATT to the rotor pickup inside the cap..It should read between 6000 and 30k ohms for a standard HEI. Check the carbon pickup in the cap also to be sure it isn't broken or past runout..

If that's not the problem, and voltages are good, suspect the module, Pull it and take it to the auto parts store and have it tested.

Test it several times to "Heat" it up..If you need a new one, have that one tested BEFORE you leave the store..

The fail rate on those is abysmal out of the box..and once you leave, It becomes your problem, and will only screw up your troubleshoot..(It can't be the module..It's brand new..)

In either case replacement or reinstall of the old..DO NOT forget to clean off the old heatsink compound and apply new compound..(or you really need a module in a few weeks..)

If that Doesn't fix the problem, Then the magnetic pick up is probably bad..Ohm it out by getting the specs for it Or set it on a High Star, and pass a mailable Screwdriver past it..the meter will jump if it's working at all...

Testing spark is best done with any old timing light, to any wire..On a modern HEI if it's sparking at all, It will strobe at crank speed..This eliminated the possibility of getting bit..and aceing a module from spurious feedback ..

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations

Last edited by docvette; 11-14-2005 at 08:40 PM. Reason: Added Info..
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
"Basic of Basics" Welding - How do I repair body panels? Centerline Body - Exterior 33 03-31-2014 09:45 AM
350 sbc upgrade... Engine will not start FenderGitars Engine 10 10-08-2010 03:26 PM
caprice wont start? Brian Morency Engine 8 08-24-2004 11:37 PM
Starter Sizzle, No Start bjam2 Electrical 13 07-16-2004 04:32 AM
350 that doesn't like to start. stocker Engine 10 03-28-2003 04:02 PM


All times are GMT -6. The time now is 11:54 PM.


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.