Last post on Nov 27, 2013 at 6:06 AM
You are in the Chevy Express & GMC Savana
What is this discussion about?
Chevrolet Express, GMC Savana, GMC Savana Cargo, Van
#29 of 108 Re: Hesitation and/or engine cutout [bakrdr]
Oct 04, 2007 (5:27 am)
Here's my solution, but first a little background: 2000 Chevy express 3500 w/5.7. Problem first presented on cool, damp morning. Engine started normally and I drove about 2 miles (engine was still cold at this point) then lost all engine power. Coasted to a stop to find engine was still running at a VERY poor idle & exhaust had strong sulfur smell. After idling for about 10 minutes it cleared up, ran normally again and was good the rest of the day. Next morning (again cool & damp) would not start at all. That afternoon started normally. The next day no start at all.
I replaced the cap & rotor and with the doghouse still removed I cranked the engine but it still would not start. However, now I could see the high voltage leak from the coil tower to the body and frame of the coil: sometimes jumping an air gap of an inch or more. Although you couldn't see it, there must have been a crack in the insulation or plastic housing of the coil.
So the rest of the story is rather than the voltage getting to the plugs, the high humidity was creating a much shorter pathway to ground. A new coil fixed my problem. Oh, and my parts guy told me he sells A LOT of those.
#30 of 108 Re: Won't Stay Started [kderda]
Oct 10, 2007 (9:22 am)
Hi, I too have a van that does the same thing yours does, sometimes it just turns over but won't start. If we let it sit for 24hrs it would usually start up again. Except for this last time when we tried to start it after it sat for a while it would crank but not start!!! ugh!! we have taken it in and they cannot reproduce the problem, so of course have no idea what the heck is happening. So if you or anyone has had an answer to this problem I would to hear about it. Thanks
#31 of 108 Re: Won't Stay Started [buffer1]
Oct 10, 2007 (1:39 pm)
Like I said, replacing the ignition coil solved my problem. Its insulation must have been compromised and in cool, damp conditions you could literally watch the high voltage discharge jump directly to ground, which made it kind of tough for any spark to get to the plugs. Your mechanic may not have been able to reproduce your symptoms if the windy ride on a tow truck or sitting in a warm dry repair shop dried out your engine compartment.
#32 of 108 Re: Hesitation and/or engine cutout [uncled]
Oct 26, 2007 (6:26 pm)
I had the same on my 2001 savana slt.after many trips I was told by my mechanic the 5.7 have a newly redesind rotor cap with more ventilation (moisture escape ).That solved the miss and sputtering on damp days.I also fixed the running motor that would just quit on me.back roads or hiways .they changed the throtle body. Both expensive labor charges but it's been running like a slt should. (radumas45)
#33 of 108 Re: Won't Stay Started [westdeer]
Nov 25, 2007 (3:33 pm)
I am learning that the computer box corrodes and gets moisture in it. I think this is what happened to me.... My gauges and trans we're acting up. I pulled the box and it had a hole in it W/ moisture inside it. I just swapped it out...
#34 of 108 Re: Won't Stay Started [indyrt]
Dec 10, 2007 (4:24 pm)
2000 savana 5.7l had in the shop for tires. Shop said hard start is due to corroded ecm or fuel pump. I replaced the fuel pump twice already It takes about 30 seconds to start but doesn't happen all the time. I replaced the fuel pump twice already. Is it worth $100 to change the ecm?just looking for some advice or recommendations thanks
#35 of 108 Re: Vans that start and then fail [lmfh]
Dec 10, 2007 (9:35 pm)
Have you ever resolved your starting issues? We have a 2002 Chevy Savana Van that won't start once or twice a day. Van is in great shape but is our work vehicle. If we follow you instructions above it starts every time. However we cannot wait 20 minutes everytime it won't start between jobs. Can't get it to do it when we take it in to GMC. We are exasperated and running out of money trying to resolve. Please share if you have fixed yours.
#36 of 108 Re: Vans that start and then fail [speedzone3]
Jan 05, 2008 (3:05 pm)
Sorry speedzone3, but we have not even tried to fix it. We understand the PassLock system is messed up somewhere along the line, but to check everything in the system at a dealership would cost way too much time and money for us too. This article explains the problem and all the points where it could go wrong and it made my brain hurt to think of the possibilities for loss of contact, corrosion, etc.
We use our van as a family vehicle and a Scout Troop vehicle and have just gotten used to the idea that we go turn the dumb van on 15 minutes ahead of time. We have 156,000 miles on it and like most Savana vans, it's still going strong except for that stupid PassLock security system issue. Hope you find a solution to your problem since it's your livelihood on the line. Good Luck.
#37 of 108 Re: Vans that start and then fail [lmfh]
Jan 05, 2008 (9:28 pm)
You mentioned an article that explains the problems and points. Is this anything you can email or fax? Please email if possible.
#38 of 108 Express van won't start = FIXED!
Oct 16, 2008 (6:34 am)
my company van would not start. few minutes later van started. took to nearest garage and noticed SECURITY light was on dash. garage owner said key and/or key ignition cylinder is worn so computer thinks i'm trying to steal van so computer cuts off fuel injectors. went to dealership but their computers were down so i could not get new key. took a chance with backup key. later that evening van would not start AT ALL and i was stranded. got tow back to house. later installed NEW ignition key cylinder AND NEW key cut from van VIN code from dealership. turned key to run position and let sit for at least 20 minutes so computer could re-calibrate to new key/cylinder. van starts up and runs fine. hope that helps!