Starts but will not stay running

Tiny
CITIJEAN
  • MEMBER
My truck did the same thing. It's the carburetor. I had someone adjust mine and it needs a rebuild kit. But the point is when hes adjusted the idle screw it hasn't stalled since.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
STEELDOI12
  • MEMBER
  • 1994 TOYOTA PICKUP
  • 309,000 MILES
Truck will start and run about 5 seconds then motor will die. Truck will restart every time ignition is turned over but will not idel or stay running more than 5 seconds. What could be possible causes?
Was this
answer
helpful?
Yes
No
+1
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
HMAC300
  • EXPERT
Scan for codes and check fuelpressure first
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
AHALL001
  • MEMBER
  • 1995 TOYOTA PICKUP
  • 188,000 MILES
Truck has times when it will keep cutting off and not won't to stay cranked, there is a gas smell and check engine light comes on for a second and goes off. We have put in a new fuel pump and changed gas filters, new exhaust system and tune-it up. Any suggestions of what the problem could be?
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
HMAC300
  • EXPERT
Scan for codes and check fuel pressure first
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
LWILLI
  • MEMBER
  • 1993 TOYOTA PICKUP
  • 2.4L
  • 4 CYL
  • 2WD
  • MANUAL
  • 286,543 MILES
Truck will crank then die. Believe the cold start injector is getting it running for a min then the other injectors aren't opening. What inputs will cause the ecu not to open the injectors? O2 sensor, temp sensor, throttle position sensor, oil sensor, mass air flow sensor! Ecu will not give fault code. Replaced fuel pump and fuel pump will run after I let off the ignition from start position to on. Have replaced the air flow sensor with a remanned one from oreilly's.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
DR LOOT
  • EXPERT
How long has the truck been sitting without running? Due to the bad fuel that ruined your fuel pump the injectors probably have to be cleaned. No code which means it's fuel related.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
LWILLI
  • MEMBER
Well I should have tested the old one before I changed it. The truck was running and there was nothing wrong with the old pump. I just thought that could be what it was and my mom bought a new one for me to help me out before I had a chance to make sure that the old one was bad. Like an idiot I went ahead and put it in and wasted 160$. But the day it broke down. I put gas in it and drove it on the interstate a good ways. Bout a 45 min drive to job interview and drove it back another 45 min to job, worked and on my way home it died. It has been doing the same thing except for one time. After I put the new fuel pump in. About the fourth time trying to crank it ran. I thought that was the fix. I let it run for about 4 or 5 min and then I turned it off. Hasn't ran again. I have tried cranking it a lot. Have reset the computer a few times by disconnecting the bat. Gas is good. New gas. Was a daily driver.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
DR LOOT
  • EXPERT
The crank sensor sends the signal to the ECU to activate the fuel pump and the injector pulse, if the injectors are not working then the fuel pump is not working either. If the fuel pump is working in the injectors are not you may possibly have some wiring problem to the injectors or the ECU is bad. You never mention what kind of fuel pressure you had or that you changed the fuel filter? If you have no fuel pressure or injection pulse, spray some Ether in the throttle body and tell me if it tries to start. If it tries to start you have a bad crank sensor.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
LWILLI
  • MEMBER
Think you have pointed us in the right direction. We are starting to focus on the igniter. The crank sensor is in the distributor. And then It goes to the igniter then Ecu. Correct? I have had a lot of firing problems. I have changed coil three times, changed the igniter once, and the condenser or capacitor whatever you call it once. We are gonna check the crank sensor and ignitor. Just wondering why we didn't get a code when running diagnostics. Should we have and how can I check ignitor speed signal to Ecu? Last time I changed it we had a parts truck on hand and just started changing parts till it ran. From what I can remember the igniter is pretty expensive.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
DR LOOT
  • EXPERT
The fuel cutoff system is Controlled through input from throttle position sensor, Engine Control Module (ECM) will cut fuel delivery during closed throttle deceleration. If you had a bad throttle positioning sensor it would not allow the injectors to operate properly. The electronic ignition system uses the Engine Control Module (ECM) for determining ignition timing (spark advance). The ECM determines ignition timing (spark advance) based on various input signals. Following input signals may be used: coolant temperature sensor, oxygen sensor, engine RPM, vehicle speed sensor, A/C switch, 4WD operation, airflow meter, knock sensor, vacuum sensor and cranking (starter) signal. Input signals may vary on model application. Integrated (ignition coil on distributor) and remote ignition coil designs are used depending on model.

On 2.4L, a single pick-up coil in the distributor delivers crankshaft position and engine RPM input signal to the ECM. The ECM monitors pick-up coil signal at NE or NE+ terminal. On all other models, crankshaft position and engine RPM input signals are delivered to the ECM by 2 pick-up coils in the distributor. Crankshaft position input signal is delivered to G, G+ or G1 (and G2 on some models) terminal of ECM, and engine RPM input signal is delivered to NE or NE+ terminal of ECM. See Figure.

On all models, ECM uses pick-up coil input signals to switch primary ignition circuit on and off. Primary circuit is turned off when ECM delivers a signal to ignitor on the IGT wire, causing ignition coil to fire the spark plug. After delivering a command to turn off primary circuit on the IGT wire, the ECM monitors IGF circuit to ensure primary switching occurred. See Figure.
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
LWILLI
  • MEMBER
We know for sure that the injectors are not getting the ground from Ecm. The 12 v is there. The spark plugs are fire ing because it will run from cold start injector and from starting fluid. What should we do?
Was this
answer
helpful?
Yes
No
Friday, October 27th, 2017 AT 11:40 AM (Merged)
Tiny
DTERREL
  • MEMBER
Does anyone know which vacuum hose exactly I need to run my toyota and a diagram
Was this
answer
helpful?
Yes
No
Tuesday, October 31st, 2017 AT 3:08 PM
Tiny
KEN
  • ADMIN
Here is both vacuum diagrams so you can see which hose goes where is this is what you needed? (Below)

Please let us know what happens.

Cheers, Ken
Was this
answer
helpful?
Yes
No
Wednesday, November 1st, 2017 AT 6:16 PM
Tiny
DTERREL
  • MEMBER
Hey guy just wanted to thank y all for all input on the toyota. Got it going today. Turns out all four injectors was bad
Was this
answer
helpful?
Yes
No
Thursday, November 2nd, 2017 AT 2:54 PM
Tiny
KEN
  • ADMIN
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help

Cheers, Ken
Was this
answer
helpful?
Yes
No
Friday, November 3rd, 2017 AT 1:14 PM
Tiny
DTERREL
  • MEMBER
Any one know what would cause od not to operate on 1994 toyota pickup was working fine up until it started getting code
Was this
answer
helpful?
Yes
No
Sunday, November 26th, 2017 AT 11:12 PM
Tiny
KEN
  • ADMIN
Can you please start a new question.

Please post your question here

https://www.2carpros.com/questions/new

Cheers, Ken
Was this
answer
helpful?
Yes
No
Monday, November 27th, 2017 AT 12:07 PM

Please login or register to post a reply.

Sponsored links