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"
Please help with my 89 s10 Chevy pckup 2.5 Lt 4cyn stick.I got the truck 3 yrs ago and only replaced water pump and I always did oil changes every 3000 miles replaced plugs, wires, even fuel filter 7 months ago also new cap@rotor.Ok to start with my gas gauge never worked so I only put 10.00 worth of fuel in at one time since I got the truck.Ok this is what happened was doing about 65ml when my truck did something new it hesitated almost like it lost fuel pressure for not even 2 sec so i rezoomed driving same spd for 3 blocks and all at once my truck shut off I tried starting and couldn’t get engine to run almost wore my battery down trying.I had it towed to my house.My sistersriend is good with cars and him and his friend said bad fuel pump I disagreed and said bad fuel injecter.When I pour alittle gas in throttle body truck fires up and runs great then dies.So i took my sisters boyfriends advice and got a new fuelpump and truck still won’t run.I opened fuel line not 4 inches from TBI intake and gas spews out nice I’m also getting spark even bypassed fuel filter with a hose and no filter and no start still.Only runs when i pour fuel directly into throttle body.MY LORD NOW 4 GUYS STUMPED HELP
We’re you able to solve? I have very same issue.
I am having the same exact problem and can’t find anyone that knows. I am in serious need of getting my 88 s10 2.5 running ASAP if you fix your problem please let me know.
Pour gas in the throult body it run until gas gone fulepump pump gas to the throultbody but won’t spray lost
Okay guys I have a 1990 s10 pick up that was running like crap back firing and stalling then one day it stop running all together I have changed the rotor the disrupted the wires and the plugs but now it will crank but not start its getting gas and fire so now what I was leaning towards the map sensor so soul I be in the right thinking could the map sensor be what I bad
air meter
I have a 98 S-10 truck quit running thought it was the fuel pump changed it truck just cranks no start replaced crank sensor and still no start need help thanks.
Hello my name is Ernie I have a 1995 S10 pickup with a 4 cylinder motor. My problem is either my fuel pump or relay fuse.The truck does not make the sound it should when I turn the switch it has never been sluggish when accelerating can someone please help me this is only way going and my wife and I both are on disability please help
We have a 1999 s10 ls pickup 2.2l that wont start. It cranks, and after a little cranking you can smell the gas fumes. We’ve even tried engine start to no avail. replaced both coils and the ignition module, checked all fuses and relays and am about to go bald. A suggestions short of dynamite would help.
I’m having same issue, did you figure it out, I have an 02 s10 2.2 replaced coil packs fuel filter fuel pump, crankshaft sensor, it has spark, but will not send power back to pump, I used a jumper wire to make sure pump runs and it does but it still wouldn’t start even with jumper in
I got a 1995 s10 replaced everything but the camshaft sensor im getting power out coil but its constant it wont spark my test light. Im stumped checked wires fuses does the camshaft do anything with the spark out of coil
1998 s 10. 4.3 Chevrolet Times my truck fires up runs good sometimes it fires up then shuts off then then after 7 8 times it will fire up sometime I wait 3 min between tries.
Hi!, my name is Jimmy, I have a 1995 Chevy pick up truck S-10. I did not drive it for a month, then I tried to drive it, the engine cranks but it didn’t start completely. I put some gas in the intake and it worked just for 20 seconds and then goes off. I did the same several times, but it was the same…(off). Is it bad function of the fuel pump relay? or the fuel pump itself?. Please help me…
Hello ok 1994 s10 blazer two wheel drive bad transmission. But started and ran great!
I bought a second Blazer same year color everything except the newest one is 4 wheel drive
ran crappy great running gear.
changed fuel pump twice every sensor at least once top plenum fuel relays brain twice prom,
shrader valve fuel filter orings catalitic converter the spider has been re-worked new fuel pressure regulator.
AND IT STILL WONT START! still wont hold fuel pressure…….WHY?
99 s10 I have to pour fuel in thottle body to crank and then only get about half thottle before it begins to cut out help
My 1989 s-10 2.5 engine. Lets too much fuel into the throttle body. It’s going into the cylinders. So far I have put a mapsensor on. Changed the one and only injector,and a new fuel pressure regulator. What will fix it.
new computer
Hey guys I got a 98 Chevy s10 pickup with the 4cyl. Someone pulled the old starter wire and added onto it with a new starter wire, and reattached it to the starter up and over the engine. Still wouldn’t start. I found if you move the big wire to a sweet spot my headlights will turn on and the truck is able to start up but once you move the wire again it dies. So I removed both power wires that were added together and put a new starter wire in the right way. Truck still won’t start even if you move the new wire under the truck cause there’s no lose connections or anything. Send me a text or an email. 9283015096
I have a 92 chevy s10 that wont start unless gas is oyred in thottle body but then runs fine, also u have to cradle the gas pettle lightly to slowly pick up speed cant an cant speed up passed 50. Push gas slightly too hard an it boughs down an will die if pettle isnt let off? Pump works an once running both injectors soray fine. Im tbinking its a sensor but not mechanically inclined an dont know where to start
Why is my 2000 chevy s10 truck not start sometimes. I finally got it started today and notice that my clock had lost 4 hours over night. Every one tells me it’s my starter, but now I’m wondering since I noticed the different in time on my clock
I have a 2000 s10 v-6. Its had a fuel pump replaced almost 3 years ago. I had new intake gaskets and complete tune up done last summer. Today after driving it for 10 minutes I shut it off to run in the store. When I came out to start the truck it didn’t want to start. It turns over fine. It finally started and I took kids to the park for a while. Got in it to leave it started right up. Got home turned it off then tried to start it it wouldn’t start. I had my neighbor turn the key while I listened for the fuel pump to him. It sounded fine. You think its electrical? My engine light isn’t on. My hose from where you put the gas in to the tank leaks a little around the clamps when I fill it up but after the truck uses gas it stops. Any suggestions? Hoping its not the fuel pump because they are very expensive for that truck and it was replaced new within the last five years. It also just had a fuel filter replaced when I got the tune up.
Having the same problem with my ’94 Chevy s10 , have replaced the fuel pump twice new relay it runs fine for a lil while then it just doesn’t want to start , next day or more it will start again! Wondering if it is some kind of overheating safety mechanism?
I talked to a guy named Larry who runs J and L auto in Owensboro, Ky. He said its not electrical and if it starts and runs fine it sounds like the fuel pressure regulator that can be purchased separate of fuel pump. It had a fuel pump replaced nearly three years ago.
OK thank you I’ll try that , I had only replaced the fuel pump itself
Should I hear fuel pump when turn on my chevy s10 1994
Yes
I got a 94 Chevrolet S10 I put a new fuel pump in it change relay got power to pump but pump will not come on check ground wires they look good what could it be change
Yes. When you turn the key on, the pump should prime for about 2 seconds. Then when cranking it should run constantly.
I have a2000 Chevy s10 I just replaced the starter. Drove it home it drunk up twice then nothin not even a click in noise had the battery tested its good good connection whats going on
Have the same with my 97 s10.. ..changed starter.. ignition switch . Battery .. it happens randomly .. get the clicking .. radio says bye bye .. keep turning key and sooner or later she will crank and start real fast ..everything works when i turn key on ..have played around with loose grounds.. neutral safty switch etc .. got me ..
I have the same problem. I have checked starter, battery, Ignition switch and nothing happen. It happen to start then 3 days later the same problem
It is possible that the new starter is no good, unless this condition is the same as the reason you replaced it. If so, then you may have an ignition switch problem or a security system problem. The “:theft or security light” would be illuminated.
I have a 1996 s-10 Chevrolet truck, it trys to crank but want happend all of a sudden. Can it be a electrical problem
So my truck would turn over but not start so I replaced the fuel pump I used to be able to put fuel in the throttle to get it going but now that doesn’t work anymore don’t know what to do next
I was driving my 2001 s10 and it bogged down like it was out of gas and died it turns over the filter and pump are working I put gas in the carborator and it almost ran but never fully started any ideahs
Sounds like the fuel pump went bad. Just because you can hear the pump run does not mean it has enough pressure.
same syptoms but already replaced fuel pump, fuel filter, I have spark, but even with new pump I cant hear pump kick on, I’m hard of hearing so I had my son listen and he said no noise from fuel tank, any suggestions, thank you in advance
i have a 2000 chev s10 and it will start if u hold throttle to the floor but u left off the gas it dies ive clened the throttle body put new plugs and changed the coil packs
Sounds like you have a low fuel pressure problem. If the fuel pump does not put out at least 55 PSI it wont start.
Thanks for all your help. There is some great info on this page !
You are very welcome !
I just put a new fuel pump on my truck and it still will not pump fuel to my carb. And my fuel pump is mounted on to the motor. Why else wouldn’t it pump gas
A friend has a chevy s10 and at 238 miles with at least half a tank of gas engine wont start till even just a gallon of gas is added
It needs more fuel pressure to start than it does to keep running.
More than 50lbs will run the motor but it takes 66 to 70 to start it.
I poured gas straight into throttle body and my 2001silverado wont start, I do not hear my fuel pump buzz when I turn on ignition, but shouldnt it start with gas pour straight into???
1995 Chevy silverodo, truck starts up but when I put it in Drive it stalls and shuts off. HELP
My dads truck won’t start it sits over night then when we try start it in morning it just turns over it does it every morning we sprayed starting fluid in it and it still didn’t start
i have a 1995 s10 it wont turn over unless you jump it, put 4 different batteries in it (not new) put new starter on it. acts like there is juice in battery, but wont turn over until you put jumpers on it.