I have a 87 4Runner that’s been sitting for several years. A fresh battery, draining fuel tank, blowing out the fuel lines, fuel pump, fuel filter, spark plugs and wire I can get it to start and running for a second and then it dies. I was thinking it might be a timing problem but wanted to ask someone else’s opinion.

 

Welcome to YotaTech.

"Start and run for a few seconds then dies" is the classic sign of a VAF-COR problem. And it's the easiest to diagnose. Jumper FP to B+ in the diagnostic connector (this forces the fuel pump to run with key-on). If it runs now, you have a problem in the VAF-COR circuit.

 

I tried and same problem.

 

Does your pump come on? I know you said you drained the tank, blew out the lines, replaced the filter and pump, but are you actually getting fuel after doing all of that? You're getting spark if it's firing up, so it's no air or no fuel stopping it from continuing to run I would think.

 

The "easy" way to check whether the pump is moving fuel is to replace the fuel return line from the FPR with 6mm/1/4" vinyl tubing, place it into a suitable container, and run the fuel pump with FP to B+. There is no spec, but I get about 1/2 liter/min. If that "test" passes, try to start. If the fuel flow cuts off, you may not have enough flow out of the pump to hold the pressure in the rail.

(The fuel return line is low-pressure, so you can remove and replace it with the hose clamp. The high-pressure connections are sealed with crush washers, which must be replaced each time they're opened. Why bother with that?)

 

Ok thanks

 

Happy New Decade and welcome to the forum... BUT
Did you bother to do what have been posted above? The reason for this forum is for us to learn from others' experience.

 

I haven’t had a chance to try yet. Probably tomorrow

 

I tried what Scope13 said and got great flow.

 

... and did it fix the problem?

 

No. Starts runs for a second and dies

 

This will help troubleshooting:
https://www.yotatech.com/forums/f199...l#post52312190

That's it?
Even if you keep on running the fuel pump with "FP to B+" ?
If you'd like people to help you from thousands of miles away, you need to let us see, hear, smell, feel what you're dealing with.

 

I got to stay running while you hold the pedal but it will not idle

 

Trying add a video

 

Was it running ok just prior to sitting several years, or were there issues?

 

it was my dads until he passed. He said the motor was getting weak but never really said exactly what was going wrong

 

Does the check engine light (CEL) work? It should come on when you turn the key to ON, but not START. If the CEL works, check for codes. That involves shorting a couple of pins in the diag connector (not sure which ones on an '87 - someone here can probably help) and counting flashes.

If the CEL doesn't work, fix that first so you can check for diagnostic codes. Diagnostics on these engines are not sophisticated, but can be helpful.