1994 Chevrolet S-10 4.3 tbi. I never get the signal to turn on the fuel pump or fire the injectors but if i poor gas in the intake once the truck starts it runs fine. Any ideas ? I have replaced the fuel pump relay oil pressure switch and computer.
ProTech:
If you’re not getting a signal for fuel, then you either have a faulty crank sensor, or bad ignition module.
But the truck runs great until you cut it off. If you poor a little gas in the intake to get it started would that only effect the starting ?
Ok. If it will start by adding fuel to the throttle body and stay running afterward, then you have a bad fuel pump.
Don’t understand ???? Pump runs and can drive the truck at highway speeds. Pump nor injectors work while in crank mode.
User 551, let’s start from scratch. Are you checking for power at the fuel pump when you’re cranking the truck? And how do you know they don’t work? Do you have a noid light on the injectors?
Yes and have nothing.
Well getting to start by adding fuel to the throttle body is not going to turn on some special switch that will send a signal to the pump and injectors. I’m sure you probably just have a bad fuel pump that doesn’t have enough pressure or volume to start the truck, but at running speed can keep up.
Ok but I straight wired the pump and can ground the blue and green signal wire on the two injectors at will spray fuel then you can turn the switch over and the truck will run on its own . Trust me I know it makes no sense. Been turning wrenches a long time and I don’t understand it. Just can’t afford to throw money at it.
That’s a new one on me. There’s no way you have no signal, but then starting the truck by adding fuel will then turn on the injectors and pump. That’s just crazy. Good luck with that one.
Once the truck starts and is running you can remove the jumper to the fuel pump and it will continue to run.
The only thing i can think of is that you are not getting the priming signal to the fuel pump, that the ECM if faulty.
Chevy S-10 Won’t Restart
It turns over fine. Sometimes starter fluid seems to help, sometimes not?
Hard to say exactly why that is happening. It could be a fuel pump that is going bad, or an ignition problem, or even a computer issue. I would recommend a fuel pressure check just to make sure it is within specs.
I also asked you if the check engine light comes on at all?
Sorry I missed it? No the check engine light doesn’t come on.
OK it’s a good thing then that the check engine light doesn’t come on, as that would rule out a probable sensor issue. I would get the fuel pressure checked to start with, because that’s where the problem is most likely to originate from.
Thank you sir.
Throttle Body
Hey fellas I’ve got a 1998 Chevy s-10 that suddenly died on us, thinking it was the battery like AAA guy said we replaced it but the truck still wont start- might turn once then goes absolutely dead. have checked fuses, not getting any juice to the fuel pump- even tried to direct wire from battery to fuel pump and nothing. now if you pour gas into carburetor it’ll run fine till gas is gone ( i know not real smart ) but we’re not having any luck finding the ground wire either thinking maybe it was just losing ground..ive had four men look at this –any advice would be greatly appreciated.
Do you mean throttle body? Your truck would not have a carburetor on it.
Yes, throttle body.
OK that’s better. But I’m still a bit confused. You say it will go completely dead, but if you pour gas in the throttle body it will run? So it is going dead, like a dead battery, or do you mean it just won’t start, but it will crank?
Cranks fine like its not getting fuel
OK so then it’s NOT going complete dead. Have you done a fuel pressure check?
Yes but there’s no pressure. Fuel pump will not kick on.
So you could have a faulty fuel pump, a bad fuel pump relay, or even a bad computer.
Relay tested good.
OK then that leaves fuel pump or computer.
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167 Comments on "Chevrolet S-10 Truck Starting Problems Answered"
I have a 1999 s 10 extreme It will not start or run unless you pour fuel in the throttle body after that runs out it dies I have put new intake gasket and new plenum gaskets on also a new fuel pump.what could I do to make it start and run.thanks
93 gmc 4.3l FI runs but dies out loss of power after 5 mins of running then wont start for 2 hours new pump new ing coil i think its a press reg. Fuel drops what do u think
I have 99 s10 2.2ltr engine wont start unless I hold throttle half way down
sounds like crankshaft positioning sensor
98 s10 chevy truck will start then die out checked fuel pump checked fuse pressure what might be the problem
OK so I got a 1997 chevy s10 blazer with the vortex in it. I had just replaced the fuel pump but now my shifter in the car won’t shift in to any of the gears and it will crank up and run. It just won’t shift into any gears like something is stopping it. Any ideas??
Bad tranny
I have 94 full size blazer with 350. I just put a 350 turbo transmission in it. Went to crank it but won’t start fuel pump is priming changed fuel filter it will fire up and run as long as u pour gas in throttle body but dies as soon as u stop. What could this be?
I have a 94GMC Sonoma..have replaced fuel pump, computer,module, has good fuel pressure.. Pour fuel in the intake but will momentary start then shut off..but has good fuel pressure at rear of motor..replaced the fuel meter body. ..do you have any idea or any suggestions?
Have 94 S10. Replaced fuel pump filter and strainer. Was sputtering on acceleration would idle fine but no throttle. Idled with 10 lbs. Pressure at rail. 2.2 litre. In this senario usually pump but you can try to change fuel filter. When putting new pump ALWAYS change filter. Good luck !!
I had the same problem with the no start and it was the fuse located in the fuse box under the hood that goes to the ECM. The fuse was blown.
My friend had the se problem and it was key switch so you try that
i have a 1999 s10 i put a new fuel pump on it and a filter now the truck wont start unless i pour gas in the carb what should i check next
98 4.3 sonoma. Going down a steep hill, I downshifted the auto to 3. It gets to bottom of hill and stalls. I roll into side lot and try to restart it. It won’t start and the battery dies. I tow it home and begin restoration process. I first diagnosed a weak spark situation. May have been like that a long time. I pull a used coil that tested in limits, $3. I also pulled a used ICM $10. I went ahead and took the cap as it looked better than mine $3. I get it all put on and it sputters. I figured its flooded. I cranked it on and off for a day and finally it fires off and runs great. I will most likely need a starter next.
I also have the dreaded fuel regulator issue. The short term workaround is to remove the connector to the vacuum sensor. It does bog down when accelerating though.
It could also use new wires and plugs. I may sell it instead because that job on the 98 Sonoma is not nice at all.
I also have the windshield wiper gremlin. I’ll fix it at the next Pull-a-part electrical sale. Its needs a controller from a newer model that fixed the glitch that causes the intermittent to fail and makes it stop mid windshield.
I have a2002s10truck w/4cycle. It starts but then dies right away please help
Sounds like a bad fuel pump. Have the fuel pressure checked when starting it.
01chevy s10 4.3 just died going 70 mph on the freeway starts back but dies when I put it in gear. Has new fuel pump
To s10 no power on fuel pump. Check ground on frame at back of bed in frame on left
I have a 1995 s10 2.2… it will start and idle all day but when you go to drive it will or sometimes try to shut off? any ideas oh and it is a 5 spd.
I have 1998 chev s10 it does the same thing it will start up and idle it wants to kill on me every now and then not all the time the gauges go crazy for a second then of
It sound like you need a new ignition switch
1989 s10 4.3 was sitting for 6 months because fuel pump went out it wasnt getting fuel to throttle body injectors . replaced pump and now its getting fuel through the injectors and acts like it wants to start but doesnt fire to run. i have spark and fuel . what could cause it to act like this . it acts as if its getting ready to start but wont fire up to run
I have a 02 4.3 s10 that I just bought that will start only when I spray starter fluid in it (I know this is bad) I can hear the fuel pump running no sure what the pressure is. Anyhow once is gets running it idles fine. I can even rev it up when in park without stalling or missing. once I put it in drive it seems to do fine unless I have to punch it. it usually doesn’t stall but will from time to time. however if im going up a hill or if im giving a lot of gas is starts to sputter through the intake. there is no indicator lights on any ideas?
Your truck has low fuel pressure. Just because the fuel pump runs does not mean the pressure is high enough.
My S-10 1998 PU is puzzling me. . . I’ve owned it for a long, long time (12 years) but when I turn the corner it cuts out and dies — all of a sudden — the garage doesn’t know what to make of it It’s my bud and I hate to park it permanently Help anyone?
check or wires shortin out on the frame or body check all grounds
Again check all pulleys on the serpentine belt they will kill engine at low speed all it takes is one bad bearing.
I drive a 1998 Chev Blazer 4.3. Vortec. I was driving one day and I noticed my RPM running high so I tried kicking it dwn and it would kick dwn. The blazer then began to jerk n loose power and was making a klicking sound near the starter area. The blazer then began jerking and losing power then stalled. It started once but would not stay running. The blazer then would not start but all lights on the dasboard are on. I thought it may have been starter so I changes the starter n pute a new battery it still wonblt srart help to give?
That could be a lot of a things. If the engine was making noise and now will not crank over, the engine may be locked up.
check your power steering pump, alternator, belt tensioner any thing running on the serpentine belt if you have an alternator bearing lock up it will stop you motor at low speed and will not be able to turn it over. Easy test is take belt off see if it starts if it does start spinning the pulleys.
I have a 95 s-10,4.3 vortec, one day I parked it and couldn’t get it to start, I changed fuel pump and it comes on but all it will do is sit there and crank but won’t start? It seems to b gettin plenty of fuel where u can purdge it up by throttle body, dnt have a fuel pressure checker or woulda done that?? Any ideas would b greatly appreciated, been messin w this dang thing for months now ever since I bout it
99 s10 4.3 w vin done engine swap and could only get it to run by pouring fuel in to TBI. Then would run. Hooked computer on it and it came up crankshaft sensor so I got that and the sensor on distributor. Replaced them both. It fired but only on three cylinders on the drivers side. What is going on??
i have99 gmc Sonoma 4.3 when I turned engine off then wont start cranks over good just wont start help
I have a 94 s-10 2.2. 5spd. I just put a used motor in it.it had a miss and narrowed it down to a bad injector on 3 cylinder. When I was taking it apart 4 injector cracked and I replaced it to. And replaced 1 as well. I had a few leaks but got those fixed. My problem is every time you start it. It is review wide open. I have had bad luck with this truck. Can anyone please tell me what could be wrong. Thank you very much
OK I have 2000 Chevy blazer Lt 4.3 vortex I am having issues I am tired of fixing and guessing OK so I was told need complete tune up fine did it coil packs and fuel filter my vehicle starts fine then maybe about 3-5starts after won’t start I wait like 15 min then it starts?? Fuel pump sending unit ??? Or injectors?? Or who knows PLEASE HELP Me a.s.a.p
I have a 1998 s10 4.3 when I start my truck i can hear the fuel pump come on but still wont start
First determine if the ennige is not getting spark or fuel or neither. Then concentrate on that area. Need to know if it cranks over or just clicks when you hit the key?
i fill the truck upcause the gas gage is off so i keep full,and while im driving it will quit running i,ll pull over and wait a minit and it starts up and go,but if i try to give a bunch of gas it wants to die ???
i have a 2001 2.2 and when im drivingthe truck just shuts,down quits running !!!i keep the tank full and the gas is off!!i replaced the fuel fillter can you help?
I have a 2002 s10 no start. Good fuel pressure to filter n to check valve on top of throttle body but will only start if I pour fuel n throttle body then dies after 20 to 30 seconds. Need help
I have a Sonoma 97 2.2 dont know if this is relate need some help my truck runs ands starts normally the problem I am having is that when I am driving and brake to reduce speed an try to resume continue driving on 2 or 3rd gear it stalls a little bit then it continues an it goes away is this problem related to the fuel pump[ some friends have told me must be a bad fuel pump I chek the pressure but since doesn’t have the gauge had to check on the bottom from the fuel filter an it read 40 psi at the most does this means I have a bad fuel pump