That screw may be for adjusting the fuel pressure. There is a similar one for the throttle lever minimum idle position. Both are capped off from the factory to prevent further tuning, but can be taken out quite easily with a fine flat screwdriver and maybe some more persuasion from a drill bit or a cutting disc.
I have 1995 throttle body in a g20 van. I saw this and looked at mine. What I saw was T8 Torx security bit should turn the screw without any mods to the housing. I have not tried yet but pretty sure it will work
The problem is is your spring they get stretched out I've done a lot of these you need to buy a new kit with a new spring kits are only like 30 something bucks at o Reillyim still driving my obd1 Chevy Astro with a new motor and still have my extra original in a crate just to save my own motor for a stormy day
@@seanr6314 I just did a gasket rebuild on the TBI unit on the 305 in my 87 Chevy pick up. I can't possibly see how you'd be able to make those turns with a wrench w/o having to partially disassemble the unit?? Are you somehow able to get a little Allen wrench in between the hard lines and make the turns?
@@nickbazzett263 Maybe a little bit, and moreso on carbureted cars. But once computerized fuel injection began being introduced in the early 1980s, they integrate a governor that compensates the idle speed changes due to putting the car into and out of gear, the load of the power steering pump, the air conditioning compressor, etc. The governor software in the computer opens the idle air control stepper motor and electronically increases the duration of the fuel injectors. If a modern fuel injected car is stumbling or racing during gear changes, using the power steering, and turning the air conditioning on and off, the idle air control stepper motor may be sticky or failed, or the air passage may be clogged with dirt.
I really don't see those going bad the spring is pretty much set forever I've had throttle bodies 280,000 Mi and it just fine and if you're trying to increase your fuel pressure you're probably going to need to change the fuel pump too
Tip: Prior to installing any new paper gaskets. Coat them (both sides) with Chapstick. This will prevent them from sticking.
interesting, never heard of that before. Any experience taking apart one that's been together a long time with the chap applied?
@@dieselmech7227 Yep, the chapstick allows easy removal later.
That screw may be for adjusting the fuel pressure. There is a similar one for the throttle lever minimum idle position.
Both are capped off from the factory to prevent further tuning, but can be taken out quite easily with a fine flat screwdriver and maybe some more persuasion from a drill bit or a cutting disc.
I have 1995 throttle body in a g20 van. I saw this and looked at mine. What I saw was T8 Torx security bit should turn the screw without any mods to the housing. I have not tried yet but pretty sure it will work
The pressure regulter is set from the factory. No adjustment is needed. That's why it's soldered.
This is for people that want to modify their engines. I added a cam and aluminum heads. Needed more fuel.
The problem is is your spring they get stretched out I've done a lot of these you need to buy a new kit with a new spring kits are only like 30 something bucks at o Reillyim still driving my obd1 Chevy Astro with a new motor and still have my extra original in a crate just to save my own motor for a stormy day
I have the same thing with the scew. Does screwing it back help to start the truck. I have no pressure I guess
Ya but watch way do you adjust it
Witch way do you turn it
How do you know how far to screw it in or out without a gauge??
Trial and error, give one turn and see how it goes.
@@seanr6314 I just did a gasket rebuild on the TBI unit on the 305 in my 87 Chevy pick up.
I can't possibly see how you'd be able to make those turns with a wrench w/o having to partially disassemble the unit?? Are you somehow able to get a little Allen wrench in between the hard lines and make the turns?
What was the issue my idle drops when put in gear
thats how every vehicle works lol
Bad IAC stepper motor.
@@gregorymalchuk272 ur idle is supposed to go down when u put it in gear
@@nickbazzett263 Maybe a little bit, and moreso on carbureted cars. But once computerized fuel injection began being introduced in the early 1980s, they integrate a governor that compensates the idle speed changes due to putting the car into and out of gear, the load of the power steering pump, the air conditioning compressor, etc. The governor software in the computer opens the idle air control stepper motor and electronically increases the duration of the fuel injectors. If a modern fuel injected car is stumbling or racing during gear changes, using the power steering, and turning the air conditioning on and off, the idle air control stepper motor may be sticky or failed, or the air passage may be clogged with dirt.
@@gregorymalchuk272 i work at a dealership even new cars have an idle drop when placed in gear
Use what you have for what? Adjust it yourself or something?
I really don't see those going bad the spring is pretty much set forever I've had throttle bodies 280,000 Mi and it just fine and if you're trying to increase your fuel pressure you're probably going to need to change the fuel pump too
regulator