View Full Version : 350 Issues

04-24-2007, 08:29 PM
So I'm at my friends place on the weekend and we were trying to get his freshly implanted TBI 350 running in his 4runner. we had everything hooked up and we tried turnning it over, we'd get a sputter here and there, but it never caught. We finally figured out that it was flooding the engine with wayy too much fuel. So every time we unplugged the fuel injectors the engine would crank then finally run for a minute or so until it ran out of fuel. So my question is, does anyone know why the TBI computer would be sending so much fuel, or is there an adjustment for how much fuel goes in?

04-25-2007, 02:42 PM
sure ya dont have a wire crossed and constant power and ground are runnin into the injector?

04-25-2007, 07:54 PM
Check your fuel pressure. Should be no more than 14psi, 10 to 14psi range on the TBIs. Check pressure on the feed AND return lines to make sure that there is no restrictions in the return line(you should have almost 0 pressure in the return line) to the tank and make sure the tank is well vented.

04-25-2007, 09:07 PM
Oh hey, sorry for the jack, but I need to get an inline fuel pump for my new 350 TBI, what should I get? Do I need a fuel regulator?

I'm jacking this thread tentatively since it is related to the original topic very closely.

04-25-2007, 09:54 PM
Edelbrock makes a series of inline pumps for EFI swaps in a variety of pressure ranges they are a little pricey but they are very quiet, I run one on the frame of my CJ for the TPI Iroc engine (will support 120 psi can't remember GPH) and you can hardly here it prime before you start the engine,we also run one on Big Bs truck for the TBI 350. They seem to be very reliable as well most of the other pumps we tried had high failure rates.

as for the second question the TBI unit has a built in pressure regulator so with the right pump no external regulator required.

04-25-2007, 11:15 PM
Nevermind, hooked up the Vechicle Speed Sensor and it fixed the problem. Injectors where shooting too much fuel thinking it was idling in drive, instead of less fuel while idling in park. Anyway, problem fixed. thanks Nutbar.

04-26-2007, 11:59 AM
are all your sensors hooked up?
if the tps sensor is reading full open then it might think you are trying to accellerate and be dumping in excessive fuel.

any engine codes?

04-28-2007, 10:14 AM
Engine runs, now we've gotta figure out the codes, cuz the light is coming on haha

04-29-2007, 11:23 AM
i have a 4runner with a 350 lol its much better than the 22r

04-29-2007, 02:58 PM
i have a 4runner with a 350 lol its much better than the 22r

Well, they arn't exactly similar motors..

04-30-2007, 06:20 PM
it fits alot better hahaha i think it feels more at home in there