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 03-17-2009, 09:46 PM   #1
6772owner
Gearhead
 
6772owner's Avatar
 
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
LT1 Question

Hey everybody with LT1's, I am having a problem getting my LT1 to start. I had the VATS programmed out of the ECU but it still doesnt seem to be firing the injectors. Anyone have any tips on troubleshooting this?

Thanks,

Clay
__________________
2002 Saturn SL2, My D/D
2019 Ford Fusion SE, Ecoboost - Wife's D/D
1993 Camaro Z28, A4, CAI, Cat-Back Exhaust

Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD!
Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644
6772owner is offline   Reply With Quote
Old 03-17-2009, 10:08 PM   #2
Elephanthead
Registered User
 
Join Date: Nov 2008
Location: Carmel, IN
Posts: 187
Re: LT1 Question

Hmm, there is a guy on the corvette forum having the same problem, look in C4 tech tips to see if he finds a solution.

http://forums.corvetteforum.com/index.php
Elephanthead is offline   Reply With Quote
Old 03-18-2009, 12:59 PM   #3
6772owner
Gearhead
 
6772owner's Avatar
 
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
Re: LT1 Question

Ok thanks for the info, I posted up the question over there.
__________________
2002 Saturn SL2, My D/D
2019 Ford Fusion SE, Ecoboost - Wife's D/D
1993 Camaro Z28, A4, CAI, Cat-Back Exhaust

Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD!
Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644
6772owner is offline   Reply With Quote
Old 03-18-2009, 02:55 PM   #4
ulakovic22
Registered User
 
Join Date: Aug 2008
Location: Lantana, TX
Posts: 419
Re: LT1 Question

OBD1 or 2 LT1? Does it crank and not start or does it not crank at all? Have you verified fuel pressure at the rail, spark from the coil and the signals from the opti?

Go to this site and look around in the how to and component location links.

www.shbox.com
ulakovic22 is offline   Reply With Quote
Old 03-18-2009, 03:21 PM   #5
6772owner
Gearhead
 
6772owner's Avatar
 
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
Re: LT1 Question

Sorry it is OBD 2 (96') the engine cranks, but I bypassed the VATS for that anyway, I havent checked the pressure yet, but have used two different pumps with no success. I have spark because it will start on Starting Fluid. I dont know about the opti signals, I will look around. I put a brand new one on the engine while it was out so idk. thanks for the info.
__________________
2002 Saturn SL2, My D/D
2019 Ford Fusion SE, Ecoboost - Wife's D/D
1993 Camaro Z28, A4, CAI, Cat-Back Exhaust

Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD!
Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644
6772owner is offline   Reply With Quote
Old 03-20-2009, 04:09 PM   #6
6772owner
Gearhead
 
6772owner's Avatar
 
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
Re: LT1 Question

Ok everyone, I have solved the problem, after three days of b/s I was not getting keyed power to the PCM. There was a fuse missing in the fuse box, she fired right up after I put in a fuse.

Thanks to all!
__________________
2002 Saturn SL2, My D/D
2019 Ford Fusion SE, Ecoboost - Wife's D/D
1993 Camaro Z28, A4, CAI, Cat-Back Exhaust

Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD!
Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644
6772owner is offline   Reply With Quote
Reply

Bookmarks


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 11:25 PM.


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