Blackdog1986Stepside

first thirty seconds sits just below 500 and then it goes to just over 100 and stays there until i put it into park, at which point it goes back up to 800 or so and then drops down to 500. at stops or turns, the rpm goes to almost 0 and if i turn the wheel with full or near full pressure on brake, it drops and stalls out.

vjsimone

So, I’m looking for that first time in the morning start-up.

Truck is already in park; (leave it in park)

(First 30 seconds rpm?, Second 30 seconds rpm?, Third 30 seconds rpm?, Fourth 30 seconds rpm?)

Blackdog1986Stepside

alrighty, will do tomorrow mornin. thanks brother

vjsimone

Yeah, then just let it Idle down and warm up on it's own until it settles out.
Then note the Idle rpm, and if it is stable.
Just trying to understand your normal start-up to warm Idle.

Blackdog1986Stepside

sounds good

Steve83

The engine can't run at all below ~200RPM, so you should never see "almost 0". If you do, it's either a fault in the tachometer, or you're misreading the tach. If the tach is faulty, then the whole question is moot. Your sig doesn't indicate if you're using a factory tach, or aftermarket.

Blackdog1986Stepside

that must be why it stops running when it gets so low

Blackdog1986Stepside

first thirty seconds it idles at 1100 then drops down to 800 and will stay there. sometimes when i start it it will rev up to 1200/1100 and immediately drop and quit

vjsimone

From my experience, the normal cold-start-up reaches 15-1800 rpms in the first 30 seconds and work its way down from there over the next 2 minutes, depending on the ambient air temperature that day. Your cold-start-up seems a bit low. Settling at 800rpm is close to normal, I believe the standard is 650rpm in Drive.

vjsimone

You can’t rule out a fuel issue until you verify fuel pressure, and if your Fuel Pressure Regulator is operating correctly.

Explain how long it takes to restart?