Last post on Dec 06, 2013 at 7:25 AM
You are in the Chevrolet S-10 & GMC S15 Sonoma
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Chevrolet S-10, GMC Sonoma, GMC S-15, Truck
#233 of 242 4.3 driveing me nuts
Apr 23, 2013 (2:52 pm)
I have a 96 S10 4.3 that has had an issue for 5 years that has me stumped.
Engine shuts down and will not restart after about 20 minutes driveing time but only in warm weather above 70. It will restart and run fine after 12 to 14 hours for another 20 minutes.
The truck runs great without issue from fall till spring then the weather gets warm and the problem returns. When it shuts down the fuel pressure with the key on is 20psi.
I replaced the fuel pressure regulator, and the filter 3 times, no change. I have not changed the fuel pump, but my thinking is if the pump was going bad it would have quit compleatly by now. I have had several 4.3s and have replaced alot of fuel pumps on them, none acted like this.
Any thought on this would be great
#234 of 242 Re: stalling S10, fuel pump? [cttrucker]
May 13, 2013 (8:03 am)
I have an '85 S-15 4WD Ext Cab and am having the same problem. Sometimes I can't make it a mile from home before this begin, sometimes I drive about 30-40 miles and it doesn't happen at all, however it will almost certainly happen coming up the hill on the way home. At first I could put it in neutral and it would start right up, but the more often it is happening the more trouble I am having getting the car started. The temp gauge will be in the first quarter one second, but as soon as the truck dies it flips up to overheated then back down as soon as started. Went to buy a fuel pump and the fellow told me to wrap my lines to prevent vapor lock, but I wondered if you found a reason why the problem is more prominent near a half tank.
Any advice someone would have would be welcome, especially what are the cheapest things to work on/replace as I try to pin point the problem.
#235 of 242 Re: 4.3 driveing me nuts [fulk8]
Jun 03, 2013 (5:20 pm)
Hi, just wondered if you got that figured out, I have exact same symptoms, works great from fall too spring, once it starts hitting around 80, stalls out and dies after 30 min or so, runs perfect in the mornings, and if I have a full tank it seems to help, sound about right?..........HELP!!!!!!
#236 of 242 2001 S-10 stalling/bucking but only in warm weather
Jun 24, 2013 (4:58 am)
Once I've been driving a little bit on a warm or hot day, I'll go to pull away from a stop sign or traffic light and depressing the gas pedal makes the engine sorta rev, but have absolutely no power. If I floor it, it will buck and go a little, but not very well. If I feel like it is going to do this, revving it up and slipping the clutch on launch will get me by for one or two intersections, but eventually it will happen no matter what. The weird thing is, if it does it, all I have to do to get it to run normally for a little while is to turn it off and then restart it immediately. It never does it once I'm in motion, just when starting.
It's a 2001 4 cyl, manual transmission, just hit 80k miles.
Oct 25, 2013 (4:06 pm)
2001 s 10 2.2, 193000 mile. Anyone help with this, Truck runs fine however at times when I hit the brakes fast to stop, engine idles rough when I stop. Engine occasionaly pulses when driving fast, almost like its bucking. No codes. Throttle body gasket replaced, tune up, fuel filter, injectors cleaned and serviced. This occurs very intermintantly. May not do it for a week or two at a time, then will do it alot. The fast stops may or may not have anything to do with it. When the rough idle occurs the Tach rpms drop. It does not stall.
#238 of 242 82 S10 stalls
Oct 30, 2013 (11:26 am)
#239 of 242 82 S10 stalls
Oct 30, 2013 (11:26 am)
Hi, have an 82 S10 pu with the 2.8 ltr non computer controlled that has a minor stalling problem. After it has been run for a while and is parked, it starts fine, runs for about 10 minutes (driven), then when slowing down it stalls when it idles (has clutch). I noted it does this when coming to a stop on a slight downgrade. Once I get the engine restarted, takes some cranking, it runs fine. Truck has 100k on it, great condition, everything stock. Original coil, thermo switches, egr valve. Any ideas or experience with this situation out there? Seems like it may be a temp related problem (thermo switch issue)?
#240 of 242 91 sonoma running out of gas sputtering/stalling/bucking
Nov 15, 2013 (8:17 pm)
Have a 91 gmc s15/Sonoma. Starts up fine, idles good, runs fine for a few miles then started acting like it was running out of gas. Hopefully this will save someone some money as we have seen this same issue posted ALOT on this and several other posts. We changed fuel pump 2x, filters, coil, plugs and wires, complete tune up as done, o2 sensor, idle air sensor/valve, along with every sensor we could find. We changed part after part with no solution. Finally we pulled the truck apart again, and found the problem. Not saying this will fix your issue but this isn't the first time we ran across this problem with 2 different trucks (both gm one being the Sonoma other a chev Silverado 1500. The fuel pump isn't holding pressure after its ran a few miles and starts acting like its running out of gas. On the Silverado the line that runs from the pump to the sending unit in the tank had a pinhole straight out of the box. We thought it was a fluke. After months of battling the problem with the Sonoma we pulled the pump out of the gas tank for who knows how many times and looked at the hose and what happened was the clamp that held it in place was still tight but moved up the hose just enough it wasn't holding fuel pressure. Why it took months to figure out it was the hose causing it again on the other truck is beyond me, butwhile you are checking possible problems it wouldn't hurt to check that it doesn't cost anything except maybe some small hose clamps. Save a lot of time money and grief. Hope this helps
#241 of 242 2003 S10 shutter at stop lights
Dec 06, 2013 (7:25 am)
#242 of 242 2003 S10 shutter at stop lights
Dec 06, 2013 (7:25 am)
I have a 2003 S10, auto, V6 4x4 crew cab. Sometimes, when I'm at a stop light and my foot on the brake, the truck will shutter and the RPM's drop like it wants to die. Sometimes it does die. I place my foot on the brake and the give it gas with the other foot to keep it alive. If I restart the truck, sometimes the problem stops. If I place in Park, it stops. Also, when I turn the car on, and don't hold the key over long enough, I will get the same symptoms.