1991 Toyota Pickup starts but wiil not stay running

EDDY1963

MEMBER
1991 TOYOTA PICKUP
4 CYL
4WD
MANUAL
260,000 MILES

I have a 91 Toyota 4x4 I have been working on this problem for a few years now. It will start up and run for a few seconds and then die. I replaced the fule filter, the pump and straner, water temp. Sensor if you spray tarting fluid in the throttel body it will run. The computer has no codes. Any ideas?

6 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Do you hear the fuel pump come On when key at run? If not do below

Do this open the mass airflow meter flap wide open and attempt to start the truck-did it start?

If not test the circuit opening relay and the MAF sensor-

At the check connector with ignition switch On jumper the batt to the Fp terminal and see what happens-

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Sunday, August 17th, 2008 AT 3:33 AM

EDDY1963

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4 POSTS

I don't think I can hear the pump on. With key on.

Have to wait for someone to help me with the mass air flow flap.

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Sunday, August 17th, 2008 AT 11:01 AM

EDDY1963

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4 POSTS

With the mas air flow flap open the truck will start and run.

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Sunday, August 17th, 2008 AT 12:53 PM

RASMATAZ

MECHANIC
75,992 POSTS

Check the MAF meter wiring connection-if okay replace it-what it does is -it grounds the Fc on the COR to complete the fuel pump circuit-

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Sunday, August 17th, 2008 AT 2:51 PM

EDDY1963

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4 POSTS

I have two air flow meters and they both do the same thing. They both may be bad but is there any other possibilitys? If I hold them open it will start and run when I let it go it is like it runs out of gas. I bought an air flow meter used to replace the original one about 6 years ago for an idel fluctuation.