The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-19-2009, 07:49 PM   #1
71Longbed
Not Mine But A beauty
 
71Longbed's Avatar
 
Join Date: Aug 2004
Location: Southern CaL
Posts: 368
truck wont start

ok here we gotruck is a 5thgen 454 on a 68 c10 hei swap new msd cap new msd rotor msd coil taylor 8.2 wires brand new new spark plugs checked the dizzy cor a constant 12V which it has what else could be stopping it from starting also i did a brand new ground and positive battery cable 0 gauge wire it cranks like heck but wont start
__________________
68 Chevy Shortbed 454/400
2000 Chevrolet Camaro SS 6spd
2011 Silverado 5.3 6spd auto
71Longbed is offline   Reply With Quote
Old 05-19-2009, 08:02 PM   #2
71Longbed
Not Mine But A beauty
 
71Longbed's Avatar
 
Join Date: Aug 2004
Location: Southern CaL
Posts: 368
Re: truck wont start

would the fact that whoever did the hei swap connected the 12V source from the fuse block instedd of from the igbnition affect the capacity of it to get enough spark to start?
__________________
68 Chevy Shortbed 454/400
2000 Chevrolet Camaro SS 6spd
2011 Silverado 5.3 6spd auto
71Longbed is offline   Reply With Quote
Old 05-19-2009, 08:02 PM   #3
71swb4x4
Senior Member
 
71swb4x4's Avatar
 
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
Re: truck wont start

Is there gas in the tank? Are you getting spark at the plugs?
__________________
Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.
71swb4x4 is offline   Reply With Quote
Old 05-19-2009, 08:02 PM   #4
71Longbed
Not Mine But A beauty
 
71Longbed's Avatar
 
Join Date: Aug 2004
Location: Southern CaL
Posts: 368
Re: truck wont start

Plenty of gas the carb is chock full of gas and sprays it in pretty good but nothing...
__________________
68 Chevy Shortbed 454/400
2000 Chevrolet Camaro SS 6spd
2011 Silverado 5.3 6spd auto
71Longbed is offline   Reply With Quote
Old 05-19-2009, 08:05 PM   #5
71swb4x4
Senior Member
 
71swb4x4's Avatar
 
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
Re: truck wont start

You should still be getting 12 volts from the fuse block. It's a constant hot correct?
__________________
Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.
71swb4x4 is offline   Reply With Quote
Old 05-19-2009, 08:16 PM   #6
71Longbed
Not Mine But A beauty
 
71Longbed's Avatar
 
Join Date: Aug 2004
Location: Southern CaL
Posts: 368
Re: truck wont start

its 12v when truck is off i dont know what happens when i crank it waiting for my wife to get here so i could have her crank it while i check spark at plugs and constant 12v
__________________
68 Chevy Shortbed 454/400
2000 Chevrolet Camaro SS 6spd
2011 Silverado 5.3 6spd auto
71Longbed is offline   Reply With Quote
Old 05-19-2009, 08:46 PM   #7
STOCKISH
Formerly- 1972SuperCheyenne
 
STOCKISH's Avatar
 
Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
Re: truck wont start

I've seen lots in the past where someone hooked up a wire that has 12v while ignition is on but looses the 12v when key is switched to the start position. Definately double check that.
__________________
--Josh

My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218

A good crossthread is better than Loctite any day.

Life is not about what you have, but who you have to share it with.
STOCKISH is offline   Reply With Quote
Old 05-22-2009, 08:28 PM   #8
71Longbed
Not Mine But A beauty
 
71Longbed's Avatar
 
Join Date: Aug 2004
Location: Southern CaL
Posts: 368
Re: truck wont start

when i crank the truck it drops to 10Volts anyone have a picture of the wire to splice on the ignition i got the dizzy checked today it pulls all the way to 7K rpms so its not the dizzy
__________________
68 Chevy Shortbed 454/400
2000 Chevrolet Camaro SS 6spd
2011 Silverado 5.3 6spd auto
71Longbed is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 05:14 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com