engine dies when braking
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 304
Likes: 0
engine dies when braking
I just had the brakes done on my 78 f-150. I took it to a trusted shop where they replaced mc, booster. I've found that sometimes when I come to a complete stop, the engine (351m) dies..this happened a couple of times, but not every.
I'm assuming this is a power issue. what can I do to fix this?
btw- drums in rr, disc front and 35" tires
on a side note- the shop said that the brake lines seem fine (no leaks) and did not replace them, but I worry due to them being original and I live in the rust belt. should I have this done or if it's not broke don't fix it?
I'm assuming this is a power issue. what can I do to fix this?
btw- drums in rr, disc front and 35" tires
on a side note- the shop said that the brake lines seem fine (no leaks) and did not replace them, but I worry due to them being original and I live in the rust belt. should I have this done or if it's not broke don't fix it?
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
When the motor cuts out, does it stumble or shake at all before stalling, or is it a fast cut-out? Inspect the 3/8" ID vacuum line that runs from the booster to the intake manifold.
As for the brake lines, get underneath, take a look at them and see if there are any rust issues or not.
As for the brake lines, get underneath, take a look at them and see if there are any rust issues or not.
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 304
Likes: 0
[QUOTE=fmc400;6870797]When the motor cuts out, does it stumble or shake at all before stalling, or is it a fast cut-out? Inspect the 3/8" ID vacuum line that runs from the booster to the intake manifold.QUOTE]
it seems to just slowly die. If I give it some gas, it keeps going. It may shake a bit, but I don't recall anything out of the ordinary
it seems to just slowly die. If I give it some gas, it keeps going. It may shake a bit, but I don't recall anything out of the ordinary
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
I agree with 75F350, it could be a vacuum leak. With the motor idling, spray a can of carb cleaner around suspect areas and listen for a jump in idle. I'd start with the booster and the booster vacuum line.
Trending Topics
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 304
Likes: 0
thx guys, I'll give it a shot and report. maybe this will be of help to someone else someday.--Matt
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Junior User
Joined: Feb 2004
Posts: 54
Likes: 0
Tell me more. What brand/model, how much? What makes it the best thing that you have every done.
Elder User
Joined: May 2006
Posts: 947
Likes: 0
From: Spokane, Washington
You might want to go for the cheaper route "easier" route, replacing the dist. isnt necessarily going to do anything and isnt always the problem like first suggested and I'd trust FMC and 75350 with it being a vacuum leak. Check the one coming off the Power Booster, if they didnt put it on tight/right or if it is crack which is very possible. Mine was cracked so I replaced it made my truck run right.
Replacing the distributer isnt always the answer to everything
Replacing the distributer isnt always the answer to everything
Senior User
Joined: Mar 2008
Posts: 167
Likes: 0
From: Gold Coast Australia
I hope this has helped Creed.
Junior User
Joined: Aug 2008
Posts: 78
Likes: 0
From: Spanaway, WA
Wait! So <i>THAT'S</i> what I've been doing wrong. When my marriage was failing I just replaced my distributer. I ended up divorced.
You're right, it's NOT the answer to everything.
You're right, it's NOT the answer to everything.
Elder User
Joined: Apr 2006
Posts: 649
Likes: 0
I just had the brakes done on my 78 f-150. I took it to a trusted shop where they replaced mc, booster. I've found that sometimes when I come to a complete stop, the engine (351m) dies..this happened a couple of times, but not every.
I'm assuming this is a power issue. what can I do to fix this?
btw- drums in rr, disc front and 35" tires
on a side note- the shop said that the brake lines seem fine (no leaks) and did not replace them, but I worry due to them being original and I live in the rust belt. should I have this done or if it's not broke don't fix it?
I'm assuming this is a power issue. what can I do to fix this?
btw- drums in rr, disc front and 35" tires
on a side note- the shop said that the brake lines seem fine (no leaks) and did not replace them, but I worry due to them being original and I live in the rust belt. should I have this done or if it's not broke don't fix it?
IF they replaced the booster, you need to check vacuum leaks. There is a plug on back of the carb that can be used. Where is the booster hose going? I'd be surprised if this isn't your issue. You might want to take it back and make them fix it.
Postmaster
Joined: Oct 2005
Posts: 3,034
Likes: 1
From: NJ
Sounds like a vacuum leak to me as well, especially if it only happened after they replaced your booster. If it was a carb. or dist. issue I would think you would have noticed it before this. It could be a coinicidence, but I woud say it has something to do with the booster or vacuum line from what you describe.
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 304
Likes: 0
I haven't bothered much with it, because the next night I was driving down a MAJOR road and it started sputtering. I would give it gas and it would just rev up and not pick up speed, as least not enough to keep other angry motorists from giving me their #1 finger. I got a friend to follow me so that I could limp home but...
It turns out that my brake lights decided to crap out as well....or that's what the cop told me when she pulled me over that same night and proved how fast she is at writing tickets...
signed licenseless in IL. he-he
It turns out that my brake lights decided to crap out as well....or that's what the cop told me when she pulled me over that same night and proved how fast she is at writing tickets...
signed licenseless in IL. he-he