Recent content by hagar
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5.3L dies at idle after running at operating temperature in cold weather
Like said above, most likely a vacuum leak, check the pcv hose at the rear drivers side of the valve cover, it is common to crack and leak back there and is hard to see if you don't look for it. It makes sense it's a leak since it gets worse when it's cold out, more air gets in when it's colder...- hagar
- Post #9
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
I have never seen a coolant temp corelation code before, only open circuit codes. I have however seen coolant temp sensors report improperly and not throw a code. I manipulate the air intake temp sensor in some applications so it shows vastly different than it should, and it never trips a code...- hagar
- Post #23
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
The problem with engine modules is they don't know there is a problem often. For example, if you try to start a vehicle with a coolant temp sensor shorted to -40, the engine will never figure out it's a problem, and will add insane fuel and not run. We like to think they are much smarter than...- hagar
- Post #21
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
A very cool example of the problem, thank you for sharing. It's important.- hagar
- Post #20
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
I personally set the tranny tunes up so they don't go below a certain shift torque factor setting. There is a lot of room in the part throttle shifting range to make things more aggressive, without making the shifts annoying. The benefit is not only better shift feel, but tranny longevity by...- hagar
- Post #17
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
It's true. If you for example went into your maf transfer function and added 20 percent to the calibration, thus telling the engine it is getting more air flow, your truck would run higher in the load and timing tables. If you pulled fuel out of the maf calibration, the truck would run more...- hagar
- Post #13
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
No such thing as too often, just gets worse and worse over time. More often would not be a bad idea.- hagar
- Post #10
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
Yes, in your case since you are active with it, watch for your fuel trims starting to drift positive.- hagar
- Post #5
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
Yep, i would pop the mass air flow out once a year and give it a shot of electronic cleaner. Such a random post, but I had two high mileage 6 speeds come in this week with the same issue. Obviously won't fix all of them, but something to keep in mind.- hagar
- Post #3
- Forum: Engine & Drivetrain
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H
Random helpul info
One of the number one failures of modern transmission comes from torque report problems, and most often than others, from the engine not knowing it should be at a certain load. When I get a vehicle in for a tune to fix flair shifts and try to save the trans, the first thing I do is check the...- hagar
- Thread
- Replies: 0
- Forum: Engine & Drivetrain
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H
A heads up for y'all.
One of the number one failures of modern transmission comes from torque report problems, and most often than others, from the engine not knowing it should be at a certain load. When I get a vehicle in for a tune to fix flair shifts and try to save the trans, the first thing I do is check the...- hagar
- Thread
- Replies: 24
- Forum: Engine & Drivetrain
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Y'all's Thoughts on Torquing Bolts Correctly, Please
One thing you will notice when you get used to setting a bolt to a certain spec, is that you can actually feel your arm come up on tension, as you approach to set torque. I started off millwrighting and learned the feel of things like many. I still won't torque anything critical without being to... -
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Y'all's Thoughts on Torquing Bolts Correctly, Please
Hahahha! That sound of something metal bouncing off the road as you make your first turn after replacing something, takes on a whoooole different meaning when you are in the air, for sure.... -
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Y'all's Thoughts on Torquing Bolts Correctly, Please
If they are flat, try torquing a cylinder head or manifold from the outside in and see how that goes. How about gasket squish as another factor? Even if the cylinder head and block were dead flat (which they are not,) you still have compression from the gasket. Are you saying that if you torque... -
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Y'all's Thoughts on Torquing Bolts Correctly, Please
Not true. The more things that hold something down that is trying to resist being held down, the less effort each thing needs to put in. Bolts can totally lose their foot pound setting after other bolts around it are torqued down. Unless you are bolting 2 perfectly flat things together, but that...
