what do all these guages help you know
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Senior User
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what do all these guages help you know
hey guys so with all the talk about guages im curious on what they all help you know about whats going on with the motor does anyone have a list on all the pids and what they montitor i know the basic ones like ect eot and egt but what do the rest of them help diagnose thanks
Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
they just tell you the Health of the Moter and maybe other things depending what gauges you run
they all have certain values they need to be within
another example would be ICP and IPR% these two will tell you the condition of the HPO system
they also have to be checked a certain way to get accurite readings with some of them
they all have certain values they need to be within
another example would be ICP and IPR% these two will tell you the condition of the HPO system
they also have to be checked a certain way to get accurite readings with some of them
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
What Benny said^^^^. Plus it's a good piece of mind on the road just to know what's going on under the hood. Here's what you can see with a ScanGauge, I think the other units like the Insight may show a few more.
First, what it won't do:
Fuel pressure
Exhaust gas Temp
Low (crankcase) oil pressure
These values are not monitored by the engine computer, there are no sensors under the hood so the SG can't see them.
What it will monitor:
Fuel Level
Battery voltage
Engine coolant temp
Engine oil temp
Trans fluid temp
Intake air temp (on 2 different sensors)
Injection control pressure
Injection pressure regulator
FICM (fuel Injection Control Module) main power
FICM vehicle power
FICM logic power
FICM sync status
Camshaft sync status
Crankshaft sync status
Fuel injector timing
Fuel injector pulse width
Fuel injectors 1-8 on/off commands
Radiator fan speed
Radiator fan duty cycle
Barometric pressure (ambient)
Exhaust back pressure
Turbo Boost (by tinkering with baro settings)
Turbo duty cycle
manifold absolute pressure
Accelerator pedal position
V-ref voltage
Trans shifter position (automatic)
Mass Fuel Desired
First, what it won't do:
Fuel pressure
Exhaust gas Temp
Low (crankcase) oil pressure
These values are not monitored by the engine computer, there are no sensors under the hood so the SG can't see them.
What it will monitor:
Fuel Level
Battery voltage
Engine coolant temp
Engine oil temp
Trans fluid temp
Intake air temp (on 2 different sensors)
Injection control pressure
Injection pressure regulator
FICM (fuel Injection Control Module) main power
FICM vehicle power
FICM logic power
FICM sync status
Camshaft sync status
Crankshaft sync status
Fuel injector timing
Fuel injector pulse width
Fuel injectors 1-8 on/off commands
Radiator fan speed
Radiator fan duty cycle
Barometric pressure (ambient)
Exhaust back pressure
Turbo Boost (by tinkering with baro settings)
Turbo duty cycle
manifold absolute pressure
Accelerator pedal position
V-ref voltage
Trans shifter position (automatic)
Mass Fuel Desired
Fleet Owner
Joined: Nov 2003
Posts: 27,901
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Watching your vehicle voltage can let you knnow when batteries or alternator are failing. his can help keep the FICM from being damaged from heat (it amplifies 12V to 48V and generates heat. If it works harder, it gets hotter).
Watching fuel pressure can help the injectors last longer (45 psig minimum at WOT, some say 50 psig).
Watching Boost can help determine if your turbo is sticking. Catching that early can prevent quite a few things.
Watch ECT (coolant temp). Get to know what is normal. If this starts creeping up, then you know you have a developing coolant issue.
Watching ECT-EOT (oil temp) - 15 degree delta max. The TSB says this 15 degree limit is on a fully warmed engine and on a hard acceleration to 65 mph.
Watching EGT can help protect turbo bearings. You don't want to shut the engine down immediately after towing, etc or you could jeopardize your turbo bearings.
Tranny temp - self explanatory (same as coolant temp)
The rest of the parameters you can watch are probably more helpful for troubleshooting purposes than for everyday watching.
Watching fuel pressure can help the injectors last longer (45 psig minimum at WOT, some say 50 psig).
Watching Boost can help determine if your turbo is sticking. Catching that early can prevent quite a few things.
Watch ECT (coolant temp). Get to know what is normal. If this starts creeping up, then you know you have a developing coolant issue.
Watching ECT-EOT (oil temp) - 15 degree delta max. The TSB says this 15 degree limit is on a fully warmed engine and on a hard acceleration to 65 mph.
Watching EGT can help protect turbo bearings. You don't want to shut the engine down immediately after towing, etc or you could jeopardize your turbo bearings.
Tranny temp - self explanatory (same as coolant temp)
The rest of the parameters you can watch are probably more helpful for troubleshooting purposes than for everyday watching.
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