Topic: EFI Problems, help

[yota_krawler]

I have a wired set up, it is a 84 ext. cab on a 85 four runner frame and running gear, with a 87 efi motor swap. Now my problem is, when i drive it starts to bog down and sputter and pop and hesitate when you give it full throttle but if you baby it, it doesn't do quite as bad. I thought it was the alternator (the battery isn't holding a charge) put it in and it didn't work battery still loses charge so i had it tested 4 differant times all say its good, changed coil, new battery, computer, people have told me that it is fuel but it isn't consitant. could it be distributer, timing, or fuel?

[MiniSimp]

Have you adjusted your TPS Sensor, Valves, Timing, Cleaned Fuel Injectors, changed your Spark Plug Wires, Spark Plugs?

[Hottrod81]

Maybe a Fuel Pump?

[yota_krawler [OP]]

when you take the fuel pump out crank it over how much should come out? it was a steady but not a very thrustful stream i have heard like 50 psi and it wasn't 50 psi

[yota_krawler [OP]]

are carbed plug wires the same as efi or are they differant?

[toynorcal]

I would start at your battery if its losing charge, but still tests good. Sounds like you have a bad ground connection or a draw on the system. You may want to go through the ingition and charging systems with a fine tooth comb.

Sputtering during acceleration is usually caused by poor air/fuel mixtures or bad spark. I would guess that you have a battery charging problem that is causing poor spark.