K5 Blazer Forums  
Home of the K5 Blazer/Jimmy including GM Trucks and Suburbans.  
Go Back   CK5 Forums > General Discussion > The Garage

Remove these ads.

Thread Tools Display Modes
Old 12-08-2011, 10:07 AM   #1
Join Date: Apr 2009
Location: Eastern OK (Home of Cavanal, World's Highest Hill)
Posts: 382

i Trader: (0 )

Won't start - '97 Suburban 5.7 Vortec

No luck using Search....

'97 Suburban 4x4 5.7L Vortec (stock)
Topped off with coolant the other day and filled the overflow. Overfilled the overflow. I was headed home so I just figured I would siphon or syringe the overflow once I was home. Let it run a little while as outside temp was in 30's F. Got in drove about 2.5 miles up a bumpy county road. It died in motion at about 30mph. Rolled as far as I could. Would not start. Shade tree mechanic happened to stop. Tried jumping as I had cranked it for a bit. Used his meter and said battery was gradually losing voltage. Fuel gauge was around 1/8 tank and had noticed it recently varying more on inclines, declines, etc. Put a few gallons gas in with no luck. Ended up pulling it home. Left it for thr night as I felt like crap.

Yesterday: charged up battery. No luck. Tried identical battery out of another truck. No go. Had spare fuel filter so i changed it. Tapped around on Fuel Pump Relay. Fuel Pump is cycling with key. Sounds strong. Outdoor temp about 50F. It cranks fine just doesn't start. Checked for codes with Hypertech. No DTCs.

Dr. put me off work for medical reasons. Company is being a$$es on my pay. So I really don't have the money to do anything. Much less throw hopeful parts at this thing. Also can't work on it for too long so I don't get sicker before surgery...

Any ideas? The cheaper the better. Any thinking it had to do with coolant. It was the only change before breakdown.

Googling hasn't gotten me anywhere as of yet.
Many thanks in advance.

EDIT: Contrary to my sig there was only stock program in computer...
CAVANALK5 is offline   Reply With Quote

Remove these ads.
Old 12-08-2011, 10:23 AM   #2
Join Date: Dec 2005
Location: SO.CAL
Posts: 387

i Trader: (4 )

Do you have a spark also can be neutral switch
JUNIOR-K5 is offline   Reply With Quote
Old 12-08-2011, 11:39 AM   #3
Join Date: Oct 2011
Location: Alabama
Posts: 60

i Trader: (0 )

My dad had a 95 Tahoe non vortech but im sure it shares many of the same components.

First off, if you ever manage to kill the engine from lack of fuel it takes nearly 1/2 tank or more to re prime that pump. had this happen to my father and it wouldn't pick back up untill the tank was nearly full. it works fine at low levels but once it pulls air its a pain in the butt.

second is the coil. its a cheap item to replace and we have had to put 5 of them on the tahoe its good to have a spare with these motors as they will go out and leave you stranded. you dont even have to mount it just stick the spare coil on there and see if it fires.
Safari-K5 is offline   Reply With Quote
Old 12-08-2011, 11:47 AM
Posted in reply to Safari-K5's post starting "My dad had a 95 Tahoe non vortech but..."
Join Date: Oct 2002
Location: Edmonton Alberta Canada
Posts: 1,301

i Trader: (0 )

I'd look for spark while someone tries to start it. ruling that out see if its getting fuel as if it did run out of gas it could just need to prime itself more.
George_Pimpdaddy is offline   Reply With Quote
Old 12-08-2011, 01:55 PM   #5
Join Date: Apr 2009
Location: Eastern OK (Home of Cavanal, World's Highest Hill)
Posts: 382

i Trader: (0 )

I've never really been into one of these, so please forgive my ignorance. I hate paying mechanics so I'm one of those who Googles like crazy and tries to fix what I can myself...

I jumpered the fuel pump relay to see if that could be...it ran the pump while I cranked. Cranked on it here and there fr a little while til I could tell I bogged the battery down. Had it on the charger so I tried it in "Start" mode.

Was alone so I didn't have anyone to crank.

Best way to check for spark? Also can I jumper the starter relay to crank while I'm underhood?

I'll keep the 'cheap' coil in mind. Unfortunately nothing's cheap right now, so please take no offense to that. Seems like Murphy's Law loves automobiles lol.

Is there any trick to getting I primed? Just crank on it or should I jumper the pump relay for a while and let the pump run without cranking?

As a K5er I'm somewhat hesitant to add fuel to a 'drop-2-change-pump' tank, so I'll check for spark first.

Should I be able to see actual fuel spray?

--Thanks again for the replies guys.
CAVANALK5 is offline   Reply With Quote
Old 12-08-2011, 02:29 PM
Posted in reply to CAVANALK5's post starting "I've never really been into one of..."
Join Date: Feb 2006
Location: Maine
Posts: 87

i Trader: (0 )

I have a 97 also that will not start. First off, just cause the fuel pump is on dosent mean that couldnt be your problem. My pump was on but did not have the correct pressure. I beleive they are supposed to be around 55 mine was only at 30, with a pressure tester. Mine is coming up with two codes now, one crank sensor (already replace last winter) and a cam senesor. Gotta do more testing this weekend, Im thinking its my ecm.
Mine truck did not just die, it was a gradual thing where it would take a long time to start, but when it did it would run fine. Just kept getting worse, untill now it wont start, well rarely it will but will only run for 5 seconds or so.

Rebil79 is offline   Reply With Quote
Old 12-08-2011, 02:41 PM
Posted in reply to Rebil79's post starting "I have a 97 also that will not start. ..."
Join Date: Apr 2009
Location: Eastern OK (Home of Cavanal, World's Highest Hill)
Posts: 382

i Trader: (0 )

Thinking back on mine, it always started very quickly and easily before this...

I'm gonna see if I can get ahold of a pressure tester.
CAVANALK5 is offline   Reply With Quote
Old 12-08-2011, 06:28 PM   #8
Supporting Member
Fordum's Avatar
Join Date: Jul 2008
Location: Fl
Posts: 9,566

i Trader: (2 )

OK, first, either do it in bright sunlight, or get a good light, and just do an underhood inspection. Shake wires, follow hoses and harnesses and look at the distributor and all electrical parts really hard.

It costs nothing, and since it occurred on a bumpy road, you just might see something that has come loose.
I assume this is TBI, if so, you can see the spray when you take the breather cover off.
But, you should smell gas if its spraying and not cranking. Just get a bright light and watch under the injectors when someone cranks for a second or two.

Don't get you face too close in case if flashes back, and if you see spray, stop and put the cover back on.

If you see spray, after you put the cover back on, pull off one of the sparkplug wires from its plug, slide a screwdriver up inside, and place it on the block where the metal part is not touching any part of the car, but is close to a grounded part.
Like an 1/8 of an inch or less.
Crank the engine, and you should see a nice blue spark within a second or so.

Odds are one or the other is not going to be there. Either spray or spark.

Let us know which it is.


Some people say that humans became human when they tamed fire.
Or when they began to create tools instead of just improving on nature.
Humans became human when one climbed down out of the tree or walked out of the cave, picked up a long sharp stick, a big club, and went " Here Kitty Kitty......."

Fordum is offline   Reply With Quote
Old 12-08-2011, 06:36 PM
Posted in reply to Fordum's post starting "OK, first, either do it in bright..."
Join Date: Feb 2006
Location: Maine
Posts: 87

i Trader: (0 )

Its not TBI. Vortec.
But something else I thought of is that the bushing in the distributor can go on these. See if there is any play in it.
Its not really a good idea to do this but you can take off the air intake tube over the intake (where the carb would be) and pour in a little gas and try to start it. If it starts for a second or two you have spark. Thats a easy way to check, but not the best way.

Rebil79 is offline   Reply With Quote
Old 12-08-2011, 07:18 PM
Posted in reply to Rebil79's post starting "Its not TBI. Vortec. But something..."
Supporting Member
63chevyll's Avatar
Join Date: Aug 2009
Location: Colorado Springs
Posts: 4,499

i Trader: (2 )

I'm.with the check fuel pressure test. The vortec. Engines are picky on pressure and volume
63chevyll is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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 -7. The time now is 03:49 AM.

Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.