No power
Thread Starter
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
No power
94.5 PSD 4x4 5spd.
Trucks starts , idles and runs well but has no power.
And I mean no power, it hardly will pull itself up a little
hill.
I took the fuel bowl completley apart and cleaned everything and installed a new filter.
Didnt change anything.
HPOP oil is up.
Truck was smoking going down hill but was at least running well before this.
And I mean a ton of smoke , like thick cant see through smoke.
Anyone got any ideas?
Thanks
Trucks starts , idles and runs well but has no power.
And I mean no power, it hardly will pull itself up a little
hill.
I took the fuel bowl completley apart and cleaned everything and installed a new filter.
Didnt change anything.
HPOP oil is up.
Truck was smoking going down hill but was at least running well before this.
And I mean a ton of smoke , like thick cant see through smoke.
Anyone got any ideas?
Thanks
Junior User
Joined: Nov 2008
Posts: 50
Likes: 0
From: Ely, NV
is the check engine light on? did it happen all of a sudden or has it been getting worse?
how is the fuel pressure?
Blue smoke is usually assoicated with oil, black too much fuel, white unburnt fuel.
just from the description it sounds like a intake or exhaust restriction , possible turbo or plugged cat. Turbos sometimes fail and pump oil into the exhaust, creating alot of smoke.
how does the engine sound? any hissing or other unusual sounds?
how is the fuel pressure?
Blue smoke is usually assoicated with oil, black too much fuel, white unburnt fuel.
just from the description it sounds like a intake or exhaust restriction , possible turbo or plugged cat. Turbos sometimes fail and pump oil into the exhaust, creating alot of smoke.
how does the engine sound? any hissing or other unusual sounds?
Thread Starter
|
Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
is the check engine light on? did it happen all of a sudden or has it been getting worse?
Its gotten worse. No CEL!
how is the fuel pressure?
Havnt checked pressure.
Blue smoke is usually assoicated with oil, black too much fuel, white unburnt fuel.
just from the description it sounds like a intake or exhaust restriction , possible turbo or plugged cat. Turbos sometimes fail and pump oil into the exhaust, creating alot of smoke.
how does the engine sound? any hissing or other unusual sounds?
Its gotten worse. No CEL!
how is the fuel pressure?
Havnt checked pressure.
Blue smoke is usually assoicated with oil, black too much fuel, white unburnt fuel.
just from the description it sounds like a intake or exhaust restriction , possible turbo or plugged cat. Turbos sometimes fail and pump oil into the exhaust, creating alot of smoke.
how does the engine sound? any hissing or other unusual sounds?
It goes not bad in 4th gear going down hill you can get it up to speed.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
Do you have a boost gage? Might be a boost leak. Use soapy water on all the intake connections & boots.
Disconnect the MAP sensor on the firewall....see any difference?....check the small rubber line going to it too.
Might be an exhaust leak. Look for black soot on the firewall right behind the turbo.
Disconnect the MAP sensor on the firewall....see any difference?....check the small rubber line going to it too.
Might be an exhaust leak. Look for black soot on the firewall right behind the turbo.
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Thread Starter
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
Do you have a boost gage? Might be a boost leak. Use soapy water on all the intake connections & boots.
Disconnect the MAP sensor on the firewall....see any difference?....check the small rubber line going to it too.
Might be an exhaust leak. Look for black soot on the firewall right behind the turbo.
Disconnect the MAP sensor on the firewall....see any difference?....check the small rubber line going to it too.
Might be an exhaust leak. Look for black soot on the firewall right behind the turbo.
Ive had a exhaust leak ever since i owned it.
Thread Starter
|
Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
Do you have a boost gage? Might be a boost leak. Use soapy water on all the intake connections & boots.
Disconnect the MAP sensor on the firewall....see any difference?....check the small rubber line going to it too.
Might be an exhaust leak. Look for black soot on the firewall right behind the turbo.
Disconnect the MAP sensor on the firewall....see any difference?....check the small rubber line going to it too.
Might be an exhaust leak. Look for black soot on the firewall right behind the turbo.
Can spin the tires on ice now things are looking up........
Whats the MAP do? (in general)
Is that it on the firewall or is that just the plugin?
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
fficeffice" /><o
></o><TABLE class=MsoNormalTable style="WIDTH: 240pt; mso-cellspacing: 0cm; mso-padding-alt: 2.25pt 2.25pt 2.25pt 2.25pt" cellSpacing=0 cellPadding=0 width=320 border=0><TBODY><TR style="HEIGHT: 15.75pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes"><TD style="BORDER-RIGHT: #eae6dd; PADDING-RIGHT: 2.25pt; BORDER-TOP: #eae6dd; PADDING-LEFT: 2.25pt; PADDING-BOTTOM: 2.25pt; BORDER-LEFT: #eae6dd; PADDING-TOP: 2.25pt; BORDER-BOTTOM: #eae6dd; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent">NOTE <o
></o></TD></TR></TBODY></TABLE>
<o
> </o><TABLE class=MsoNormalTable style="WIDTH: 240pt; mso-cellspacing: 0cm; mso-padding-alt: 2.25pt 2.25pt 2.25pt 2.25pt" cellSpacing=0 cellPadding=0 width=320 border=0><TBODY><TR style="mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes"><TD style="BORDER-RIGHT: #eae6dd; PADDING-RIGHT: 2.25pt; BORDER-TOP: #eae6dd; PADDING-LEFT: 2.25pt; PADDING-BOTTOM: 2.25pt; BORDER-LEFT: #eae6dd; PADDING-TOP: 2.25pt; BORDER-BOTTOM: #eae6dd; BACKGROUND-COLOR: transparent">Manifold absolute pressure sensors have a much different calibration on turbocharged engines than on nonturbocharged engines. Be sure you are using the proper specifications for the sensor being tested.<o
></o></TD></TR></TBODY></TABLE>
If the reference wire is not supplying the specified voltage, check the voltage on this wire at the computer. If the voltage is within specifications at the computer, but low at the sensor, repair the reference wire. When this voltage is low at the computer, check the voltage supply wires and ground wires on the computer. If these wires are satisfactory, replace the computer. <o
></o>With the ignition switch on, connect the voltmeter from the sensor ground wire to the battery ground. If the voltage drop across this circuit exceeds specifications, repair the ground wire from the sensor to the computer. <o
></o>Backprobe the MAP sensor signal wire and connect a voltmeter from this wire to ground with the ignition switch on. The voltage reading indicates the barometric pressure signal from the MAP sensor to the computer. Many MAP sensors send a barometric pressure signal to the computer each time the ignition switch is turned on and each time the throttle is in the wide-open position. If the voltage supplied by the barometric pressure signal in the MAP sensor does not equal the vehicle manufacturer's specifications, replace the MAP sensor. <o
></o>The barometric pressure voltage signal varies depending on altitude and atmospheric conditions. Follow this calculation to obtain an accurate barometric pressure reading: <o
></o>- Phone your local weather or TV station and obtain the present barometric pressure reading; for example, 29.85 inches. The pressure they quote is usually corrected to sea level. <o></o>
- Multiply your altitude by 0.001; for example, 600 feet X 0.001 = 0.6. <o></o>
- Subtract the altitude correction from the present barometric pressure reading: 29.85 - 0.6 = 29.79. <o></o>
- Check the vehicle manufacturer's specifications to obtain the proper barometric pressure voltage signal in relation to the present barometric pressure. <o></o>
Oh, and don't forget to check that tini-tiny little hole where the hose plugs into the engine. Also a good place for clogs.