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-   -   97 gmc 5.7 wont start (http://67-72chevytrucks.com/vboard/showthread.php?t=610516)

68c10owner 01-03-2014 07:25 PM

97 gmc 5.7 wont start
 
changed plugs and wires, fired it up and it ran fine. cleared some codes and fired it up to see if they would come back and it ran fine. go clean up and head out to get some lunch and wont fire. this thing fought me all afternoon and I'm spent

95 S_Trucker 01-03-2014 09:11 PM

Re: 97 gmc 5.7 wont start
 
Check fuel pressure. If you have fuel pressure, check for spark. Let us know what you find.

68c10owner 01-03-2014 09:15 PM

Re: 97 gmc 5.7 wont start
 
Quote:

Originally Posted by 95 S_Trucker (Post 6449118)
Check fuel pressure. If you have fuel pressure, check for spark. Let us know what you find.


I`m betting its a spark issue. It ran perfect when I fired it up after changing everything. Then ran perfect after clearing the codes. I`m not sure if I could have hit something but funny that it ran perfect before. I do hear the fuel pump cycle but guess its possible it`s bad. Had to walk my kids down the road for lunch and just got back a bit ago so I havent been able to get back to it.

68c10owner 01-03-2014 10:00 PM

Re: 97 gmc 5.7 wont start
 
sprayed some starting fluid into the throttle body and got nothing. Its something in the ignition I`m sure. I`m going to go get my spark tested and test light and hopefully have it back on the road tomorrow. Just seems odd that I would have a ignition failure right after doing a tune up. Started it several times after and it ran fine. Weird

68c10owner 01-04-2014 06:44 PM

Re: 97 gmc 5.7 wont start
 
Simple fix. Pickup coil connector was not connected completely. I never touched it so it's been ready to fall off since I got the truck in February. Runs pretty good now but still down on power compared to my old 99 C/K 5.0 vortec.


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