check your brake lines
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Junior User
Joined: May 2005
Posts: 67
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From: northern minnesota
check your brake lines
I just picked up a 1990 f150 4x4 302efi at,ac with 89000 miles,i live in northern minnesota,so even though this truck had the normal rust for this year & model i should have inspected the brake lines better bythe rear gas tank because the other day I stepped on the pedal and you guessed it it went to the floor. A quick check found that a 2 foot section had broken off from the junction on the differential to the right rear wheel.I should have been clued to this because anew gas tank had been installed.So everyone please inspect your lines yourself,because I just had it in the shop 2 days earlier for routine maint.and they said they checked everything.
Hotshot
Joined: May 2005
Posts: 13,484
Likes: 42
From: Stevens Point, WI
Three of our trucks have had all of the gas tanks replaced as well as all the brake lines, fuel lines, and sending units.
This hasn't been a problem till the last 4 - 5 years when they started using liquid salt on the highways.
I have coated everything replaced with under coating and haven't had a problem yet.
This hasn't been a problem till the last 4 - 5 years when they started using liquid salt on the highways.
I have coated everything replaced with under coating and haven't had a problem yet.
Thread Starter
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Junior User
Joined: May 2005
Posts: 67
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From: northern minnesota
I guess it also depends where you live and if your truck was undercoated or not,my 87 was coated and the only rust was on the back quarters,most trucks up here are coated i'm assuming this one didn't come from here.
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Senior User
Joined: Sep 2005
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got my rear shackles (all 4) replaced and leafs upgraded. rear tanks rusted out but that's why we've got 2 eh?
Is it possible to undercoat yourself? would you just use a spray on bedliner? I only plan on doing the gas tanks, but if I should do anything else, clue me in.
you bring up a great point though, my friends rear brakes went out, and since he was in 2wd, the front didn't help him all that much for stopping. the car in front of him did.
Is it possible to undercoat yourself? would you just use a spray on bedliner? I only plan on doing the gas tanks, but if I should do anything else, clue me in.
you bring up a great point though, my friends rear brakes went out, and since he was in 2wd, the front didn't help him all that much for stopping. the car in front of him did.
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Senior User
Joined: Sep 2005
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I think you misunderstood, sorry for not giving you the whole story. He was in rear wheel drive, and because his back brakes went out, his rear tires kept applying force in a forward direction. His front brakes did not have enough to stop him completely.
But please tell me if the rear brakes wouldn't have more stopping power than the front in this situation. I just thought that because the rear tires were aplying force (he has limited slip) that only rear brakes would stop the car better than only front brakes. At elast thats' what my high school physics last year makes me want to think.
He was coasting to a red light after school-just pulled out of the parking lot, and going maybe 15. He hit her at 10. No damage incurred to his truck, a dent in her bumper. Nobody hurt, but I had to give him rides to school for a couplea days while he got it fixed.
But please tell me if the rear brakes wouldn't have more stopping power than the front in this situation. I just thought that because the rear tires were aplying force (he has limited slip) that only rear brakes would stop the car better than only front brakes. At elast thats' what my high school physics last year makes me want to think.
He was coasting to a red light after school-just pulled out of the parking lot, and going maybe 15. He hit her at 10. No damage incurred to his truck, a dent in her bumper. Nobody hurt, but I had to give him rides to school for a couplea days while he got it fixed.
Senior User
Joined: Sep 2005
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thanks for clearing all that up... i don't know why it didn't hit me that the rear wheels are rolling the same as the front wheels when you are braking--i forgot to think that braking implies not accellerating (unless you're spooling up a turbo)
and now I also know the front brakes thing... sweet.
and now I also know the front brakes thing... sweet.
Hotshot
Joined: May 2005
Posts: 13,484
Likes: 42
From: Stevens Point, WI
I undercoat my 96 with waste oil out of our diesels. It is messy and sucks working on the truck when it needs it but I have yet to replace anything on my truck because of rust.
I use a cheap fleet farm paint gun to spray on the oil.
I use a cheap fleet farm paint gun to spray on the oil.
Posting Guru
Joined: Dec 2002
Posts: 1,113
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From: Remsen, NY
I had that long brake line go out on my '91. I thought there were two different circuits but yes, the pedal went to the floor and no brakes.
I make a new line for every single one on my '95 after that and said goodbye to the POS '91.
But that is a good question, why is it that when you step on the brakes with a rear line leaking does it not give you anything? I thought the front would still work and you'd get just a "brake" light.
I make a new line for every single one on my '95 after that and said goodbye to the POS '91.
But that is a good question, why is it that when you step on the brakes with a rear line leaking does it not give you anything? I thought the front would still work and you'd get just a "brake" light.