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Starts but will not stay running

Tiny
DTERREL
  • MEMBER
  • 1994 TOYOTA PICKUP
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 111,250 MILES
I have inherited this truck and it has sat for couple a years. I got it to my house installed new fuel pump, fuel filter and new EFI relay. It will start but will not stay running. I have checks mass air flow sensor and even jumped b+ to fuel pump in distributor box under hood, but still no luck. Changed ECM with one out of another running truck but still same thing. It has twelve volts to injectors but will not run. Does the igniter over on driver fender have anything to do with injectors?
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Sunday, October 22nd, 2017 AT 9:08 PM

38 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Will it stay running if you hold the revs above a fast idle? Can you check for any codes? Not all codes will set a check light.
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Monday, October 23rd, 2017 AT 12:01 AM
Tiny
DTERREL
  • MEMBER
  • 10 POSTS
No, it will not stay running and no codes.
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Monday, October 23rd, 2017 AT 1:25 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
I would flush the fuel system out it sounds like you have old gas in there. Have you put a fresh tank in it?

Let me know,

Cheers, Ken
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Monday, October 23rd, 2017 AT 3:29 PM
Tiny
DTERREL
  • MEMBER
  • 10 POSTS
Yes, drained all old gas out and put new in.
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Monday, October 23rd, 2017 AT 7:23 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
It sounds like you have a vacuum leak or a plugged exhaust system, here are some guides to help us do some checking.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

and

https://www.2carpros.com/articles/stall-at-idle

Please let us know what happens.

Cheers, Ken
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Wednesday, October 25th, 2017 AT 2:03 PM
Tiny
DTERREL
  • MEMBER
  • 10 POSTS
Ok will try the vacuum line. But exhaust it open. Thanks
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Wednesday, October 25th, 2017 AT 4:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Please let us know what happens.

Cheers, Ken
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Thursday, October 26th, 2017 AT 4:40 PM
Tiny
DTERREL
  • MEMBER
  • 10 POSTS
Ok check for vacuum leaks and found one bad line replaced a couple of them and still nothing. Checked code but did not have any.
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Thursday, October 26th, 2017 AT 5:49 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
I would get the injectors flow tested next.
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Thursday, October 26th, 2017 AT 6:33 PM
Tiny
DTERREL
  • MEMBER
  • 10 POSTS
Checked and found bad injectors
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Friday, October 27th, 2017 AT 4:47 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,883 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Friday, October 27th, 2017 AT 11:39 AM
Tiny
Z2CARPROS
  • MEMBER
  • 1 POST
  • 1994 TOYOTA PICKUP
  • 4 CYL
  • 2WD
  • MANUAL
  • 260,000 MILES
Electrical problem
1994 Toyota Pickup 4 cyl Two Wheel Drive Manual 260000 miles

the motor turns over but it wont stay on. The times it does stay on, when I turn any electrical component on (lights or heater) the engime begins to miss fire to the point it turns off. I brushed up and cleaned by ground connection as I was told it could be the problem. I have changed the spark plug wires, cap and rotor. My terminals are new.
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Load test the alternator if okay, clean out the idle air control valve and EGR valve and test the throttle position sensor and airflow meter to include a fuel pressure check.
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
FEATHER
  • MEMBER
  • 1 POST
  • 1994 TOYOTA PICKUP
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 18,600 MILES
Computer problem
1994 Toyota Pickup 4 cyl Four Wheel Drive Automatic 186, 00 miles

My truck will start, but then won't stay running. The fuel pump has been ruled out, possibly the computer? Any other ideas? Thank you
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
RODNEY FORTSON
  • MEMBER
  • 2 POSTS
I would check out the coil. I have had this problem with mine in the past and it turned out to be the coil.
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
KIB32
  • MEMBER
  • 1 POST
  • 1994 TOYOTA PICKUP
  • 6 CYL
  • 4WD
  • MANUAL
  • 150,000 MILES
Electrical problem
1994 Toyota Pickup 6 cyl Four Wheel Drive Manual 150000 miles

My toyota truck stalls when the brake is applied. It stalls or bucks sometimes when the turn signal or lights are turned on. I noticed I had a loose connection at the battery terminal on the negative. Playing with the battery terminal can get the engine to start again but the problem persists. The engine runs fine until I do one of the above things. Dosen't seem to me that a bad connection at the terminal could cause this, but I am not an experienced mechanic.
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the brake booster and the vacuum hose if its leaking
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
PERRYE
  • MEMBER
  • 1 POST
  • 1994 TOYOTA PICKUP
  • 4 CYL
  • 2WD
  • MANUAL
  • 207,000 MILES
My '94 Toyota pickup just stopped running while I was driving down the road. It did hesitate, cough or sputter -- it just quit. Now it cranks over but will not start.
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do below to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it
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Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
HCINI
  • MEMBER
  • 1 POST
  • 1994 TOYOTA PICKUP
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Engine Performance problem
1994 Toyota Pickup 4 cyl Two Wheel Drive Automatic 145000 miles

When my 4cyl Toyota Pick up is brought to a stop I must keep my foot on the accelerator or it will stall. It starts right up & may or may not need me to give it more fuel until I move. What components do you recommend checking first?
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Friday, October 27th, 2017 AT 11:40 AM (Merged)

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