4 wheel drive
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From: Somerville USA
4 wheel drive
I have a 2001 F250 4x4- I went out last night and it looks like the 4- wheel drive doesn't work. A few months ago - one of the vacuum hoses was leaking in the front so I fixed that and then it worked- Now when I shift (SOTF)- the light comes on (I hear the Thump from the front end) but there does not appear to be power to the front wheels.... thoughts?
Hook it, I'll pull it.
Joined: May 2007
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From: Grand Lake, La.
Originally Posted by Jetsfan68
How hard is it to manually lock the hubs?? they don't seem too easy to budge
http://guzzle.rbmicro.com/allube.html
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vacuum pump? I did not think these trucks had a vac pump, I thought it got the main vacuum from the intake
either way, ill bet its the hubs, if the vacuum has a leak, you should be able to tell by other means and i doubt the solenoid goes bad that easily... if it is a bad solenoid - i got an extra with the connector on both sides of it - i pulled it out of my truck
kenny
either way, ill bet its the hubs, if the vacuum has a leak, you should be able to tell by other means and i doubt the solenoid goes bad that easily... if it is a bad solenoid - i got an extra with the connector on both sides of it - i pulled it out of my truck
kenny
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Originally Posted by Mercury45
vacuum pump? I did not think these trucks had a vac pump, I thought it got the main vacuum from the intake.....
Real trucks don't have sparkplugs.....
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Originally Posted by wwb
You never said whether you have a diesel or a gas truck..... if you have a gasser, then you're correct; it runs off intake manifold vacuum. Intake manifold vacuum is darn hard to come by if you have a diesel, though, since there's no throttle... therefore, diesels have an electrically driven vacuum pump.
Real trucks don't have sparkplugs.....
Real trucks don't have sparkplugs.....
No actually the original poster never said what they have...
I assumed he had a gasser...? But maybe not - in that case it can be the vac pump. But I will have to read up on the diesels - they have an intake dont they? They must have a throttle - how else do you modulate the amount of fuel? I dont know the diesels that well at all as you can see...
And it doesn't need spark plugs to be a real truck, it just needs plugs to be quiet and smell better then a refinery
kenny
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Originally Posted by miller_feed
There is a throttle sensor next to the pedal, It sends a signal to the PCM depending on the position of the pedal. The PCM regulats the fuel output.
Mark
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Originally Posted by Mercury45
.... They must have a throttle......
To be anally technical, a throttle restricts the intake air (if it has port injection or direct injection) or it restricts the incoming air/fuel mixture (if it has throttle body injection or a carburetor). Without some means of resticting the intake, you technically don't have a throttle.