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97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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jraum
New User
Feb 26, 2012, 2:27 PM
Post #1 of 18
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97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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well i have this truck when i got it i had to replace the heads (waterpump went, overheated and cracked both heads) so its all the way back together and now its not starting im trying everything i can think of but its just not working i have the book but it's not helping me. and 1 thing i dont know what im doing but i can take it apart and tell u where everything goes. just trouble shooting is the problem.please im in desperate need to get this truck going.
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 26, 2012, 3:40 PM
Post #2 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Sounds like it's time to call a tow truck and head for the repair shop. It appears you tacked something that you weren't qualified to do. Who knows what could have gone wrong.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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nickwarner
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Feb 26, 2012, 5:07 PM
Post #3 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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HT may be on the right track here. Major engine work such as this is usually reserved for senior techs. Did you slap a gasket or did you have the heads sent to a machine shop to be surfaced, cleaned and magnafluxed? What did you set base timing at? If what I ask is greek to you, you are learning an expensive lesson and have opened Pandora's Box mechanically. Send it to the pros and consider it an expensive lesson or up your game and learn the proper way to do it with the proper tools in the proper environment.
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nickwarner
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Feb 26, 2012, 5:14 PM
Post #5 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Very well may be the case. I'm thinking of my truck myself which is a 95 TBI and therefore not Vortec. Something is amiss and not sure if this can be diagnosed by him but wanted to ask a few questions to confirm.
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Hammer Time
Ultimate Carjunky
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Feb 26, 2012, 5:16 PM
Post #6 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Wouldn't even know where to start on this one. He could have screwed up most anything or everything.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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nickwarner
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Feb 26, 2012, 5:18 PM
Post #7 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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with you on that. Did you put the crystal ball on the charger?
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jraum
New User
Feb 27, 2012, 12:13 PM
Post #9 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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lets see the same day i put this up i went outside for about 5 hours, i got the bastard started lol bad that this non mechanic got working and was told to take it to a "REAL MECHANIC" but yea i just kept on messing with the timing and i finally got it kicking.
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Discretesignals
Ultimate Carjunky
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Feb 27, 2012, 7:02 PM
Post #11 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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I wonder how far off the cam retard offset is.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Feb 27, 2012, 7:02 PM)
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Hammer Time
Ultimate Carjunky
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Feb 27, 2012, 7:04 PM
Post #12 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Yep, I said that back earlier.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Feb 27, 2012, 7:08 PM
Post #13 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Well, if it is too far off that should illuminate the check engine light, unless the light is already on for something else. Nothing like driving a gas hog with out of phase injector sync.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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jraum
New User
Feb 28, 2012, 11:52 AM
Post #14 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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let me correct myself it was the distributor lol srry for the confusion but yes its running a little rough but i was told that i had to adjust the rocker heads so the valves can open and close the right way
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Hammer Time
Ultimate Carjunky
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Feb 28, 2012, 3:48 PM
Post #15 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Yes, the rockers have to be set correctly and should have been before the engine was even run. The distributor also has to be set correctly and that requires the use of a professional scan tool. If you don't, then the primary and secondary ignition will be out of synch with each other and the injectors will be also.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Feb 28, 2012, 5:39 PM
Post #16 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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Better make sure you don't have the valves adjusted too tight or you'll burn some valves.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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techforfree
User
Mar 7, 2012, 7:44 PM
Post #17 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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wel i'll assume you checked for spark ,if so my bet is the dist was not installed properly and is now out of time.(a common mistake) but 1st check to make sure you have good spark...good luck
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nickwarner
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Mar 7, 2012, 7:49 PM
Post #18 of 18
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Re: 97 gmc yukon 350 vortec 5.7 ltr. not starting help!!!!!!!!!!!!
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TechForFree, if you had read the postings above from myself, DS and Hammer you would've seen that this was a subject already well covered. As it is, its been over a week and a half since anything new has been mentioned from the owner and I'm sure if he had further questions he would've posted them.
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