Routine Maintenance?
Thread Starter
|
Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
Routine Maintenance?
How often should the Throttle be cleaned? How do I go about cleaning the air bypass valve?
I had mine done, a year ago last fall. since then, I have driven about 15k miles. How about any sensors.
I had mine done, a year ago last fall. since then, I have driven about 15k miles. How about any sensors.
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Routine Maintenance?
Pastmaster ,
Ive a 90 300 , I find cleaning the throttle body and bypass valve about once a yr does the trick . I bought a bottle brush that fits great in and around the throttle body . Ford makes some great stuff for cleaning those areas ...its like foaming bubbles shower cleaner only for carbon . Its called Spray Carberator Tune Up Cleaner , an 18 oz can goes a long way . What I do with the bypass valve is remove the two 8mm bolts holding it on , disconnect it from the solenoid and spray the valve w the cleaner , let it set for awhile , use a pipe cleaner or a Q tip to clean it up , wipe off the excess cleaner and reinstall . Make sure the gasket is still in good shape . Cold weather always makes excess carbon deposits more noticeable , So its a good idea to clean all that stuff in the fall so you dont have to work out in the cold if you dont have a garage to work in . If you havent noticed any idling or driveability problems , Im sure its Ok .
Paul
Ive a 90 300 , I find cleaning the throttle body and bypass valve about once a yr does the trick . I bought a bottle brush that fits great in and around the throttle body . Ford makes some great stuff for cleaning those areas ...its like foaming bubbles shower cleaner only for carbon . Its called Spray Carberator Tune Up Cleaner , an 18 oz can goes a long way . What I do with the bypass valve is remove the two 8mm bolts holding it on , disconnect it from the solenoid and spray the valve w the cleaner , let it set for awhile , use a pipe cleaner or a Q tip to clean it up , wipe off the excess cleaner and reinstall . Make sure the gasket is still in good shape . Cold weather always makes excess carbon deposits more noticeable , So its a good idea to clean all that stuff in the fall so you dont have to work out in the cold if you dont have a garage to work in . If you havent noticed any idling or driveability problems , Im sure its Ok .
Paul
Thread Starter
|
Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
Routine Maintenance?
>thanks Paul!!
Got a few questions for you Paul or whomever responds. How far back into the trottle do you go? What kind of injector cleaner should I go with? Should I use 2 bottles at the same time for more power?
Actually, it idles, and is starting to hesitate like it did before the first cleaning. I am thinking that it may just do this becuase of the cold weather, but I would like to keep the mpgs and performance up! Thanks again
Got a few questions for you Paul or whomever responds. How far back into the trottle do you go? What kind of injector cleaner should I go with? Should I use 2 bottles at the same time for more power?
Actually, it idles, and is starting to hesitate like it did before the first cleaning. I am thinking that it may just do this becuase of the cold weather, but I would like to keep the mpgs and performance up! Thanks again
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Routine Maintenance?
Pastmaster ,
The cleaner I like to actual clean the throttle plates / body is Fords Spray Carb Tune Up Cleaner . Just scrub all the carbon off the bore and plates . Just go in as far as the brush allows , thats about all you can do short of removing the upper intake to clean it . Be careful with using a lot of fuel injector cleaners that you pour in the tank ..I dump some in about once a yr .. Techron , Castrol and Marvel Mystery oil all make good in the tank cleaners . My 300 6 had a rough idle from day one ... about 6 yrs ago I discovered they had revised the fuel injectors for that engine ...Better spray pattern along with being Deposit Resistant Injectors . I got them for about $70 a piece . I would buy 2 ,every 2 weeks on payday until I had all 6 . They really improved the idle tremendously as well as mileage and overall smoothness of the engine . Unless you do a lot of short haul trips with your truck , cleaning more than once or twice a yr is a waste of time ...Tell your wife the same about cleaning the house too .. Hope this helps .
Paul
The cleaner I like to actual clean the throttle plates / body is Fords Spray Carb Tune Up Cleaner . Just scrub all the carbon off the bore and plates . Just go in as far as the brush allows , thats about all you can do short of removing the upper intake to clean it . Be careful with using a lot of fuel injector cleaners that you pour in the tank ..I dump some in about once a yr .. Techron , Castrol and Marvel Mystery oil all make good in the tank cleaners . My 300 6 had a rough idle from day one ... about 6 yrs ago I discovered they had revised the fuel injectors for that engine ...Better spray pattern along with being Deposit Resistant Injectors . I got them for about $70 a piece . I would buy 2 ,every 2 weeks on payday until I had all 6 . They really improved the idle tremendously as well as mileage and overall smoothness of the engine . Unless you do a lot of short haul trips with your truck , cleaning more than once or twice a yr is a waste of time ...Tell your wife the same about cleaning the house too .. Hope this helps .
Paul
Trending Topics
New User
Joined: Dec 1999
Posts: 21
Likes: 0
Routine Maintenance?
What is a "Throttle Bypass Valve"? I have cleaned my throttle body along with the upper part of the intake manifold (at least as far as I could safely reach). I have a 92 302 with speed density.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
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
Thread Starter
|
Postmaster
Joined: Jun 1999
Posts: 2,719
Likes: 1
From: Lee's Summit MO
Routine Maintenance?
I cleaned the TB today, no problem with that. I can see the Letter "A" on the butterfly. Its really clean now. No black soot. I guess its called Carbon.
I also took the bypass off. I didn't even break the gasket. Thats a first. I cleaned it as best I could, and noticed that the first hole is very clean, but I tried and tried to clean the second hole out, but couldn't get all of the carbon off. When I first cranked it over, it kinda acted as if it didn't have gas, but I got it started finally, and it idles very smooth.
I also decided to replace the 2 year old fuel filter. That was fun!!!! I finally got fustrated and took it to a mechanic, and had him do it. After a lot of cussing. Its fixed. It runs alot better. Same as it was when I had the throttle cleaned about 2 years ago. And it cost me a total of 30 dollars. a lot cheaper! Thanks Guys! I'm glad you guys are here for the questions!
I also took the bypass off. I didn't even break the gasket. Thats a first. I cleaned it as best I could, and noticed that the first hole is very clean, but I tried and tried to clean the second hole out, but couldn't get all of the carbon off. When I first cranked it over, it kinda acted as if it didn't have gas, but I got it started finally, and it idles very smooth.
I also decided to replace the 2 year old fuel filter. That was fun!!!! I finally got fustrated and took it to a mechanic, and had him do it. After a lot of cussing. Its fixed. It runs alot better. Same as it was when I had the throttle cleaned about 2 years ago. And it cost me a total of 30 dollars. a lot cheaper! Thanks Guys! I'm glad you guys are here for the questions!
Senior User
Joined: Jun 1999
Posts: 145
Likes: 0
Routine Maintenance?
i have an f-150 4x4 5.0l manual xmsion i have one question. why does the throttle body get carbon build up? i would think if you have a good air filter it will never get dirty. is this true? yes thanks alot fellas for all the great info too!
this site is great
this site is great
Posting Guru
Joined: Jun 1999
Posts: 1,525
Likes: 1
Routine Maintenance?
I'd like to add to the reason for carbon buildup. Yes the EGR as well as PCV or the main culprits for this action, but the sludge actually forms from the inside of the manifold coming out because of the vacuum pulses present in the intake.Isn't that weird how that happens ? If the filterd air was to blame,the beggining of the throttle body would always be caked just like what you see when open the throttle and look inside! It's the stuff inside that's actually pushing itself outward because of the vacuum pulses in the manifold.
Phillip
Phillip
Thread
Thread Starter
Forum
Replies
Last Post
