low boost issue
Thread Starter
|
Freshman User
Joined: May 2008
Posts: 33
Likes: 0
low boost issue
well, im back again. if its not one thing, its another.
what i have this time is ive noticed a low amount of boost in my truck. i installed an edge evo about 1 yr ago, had no problems with it. i used to be able to reach 22 psi and active the CEL( when i wanted too). now, the BEST it will do is 8 psi. the truck runs just fine, doesnt seem to lack power, EGT's are normal ( 4-700 around town, 6-900 with a 4000 lbs load). when i step on it, it will start to boost around 15-1700 rpm and im at the top end of the gear when it peaks at 8 psi.
I tried to test my system using a home-made setup from Izzy351 in another post, in which the system is compressed with air to help locate leaks. i noticed that my system wasnt holding the air, but i didnt find the leak anywhere. i checked the boots around the intercooler, the intake side of the turbo and i found nothing. any help??
Thanks for looking!!
what i have this time is ive noticed a low amount of boost in my truck. i installed an edge evo about 1 yr ago, had no problems with it. i used to be able to reach 22 psi and active the CEL( when i wanted too). now, the BEST it will do is 8 psi. the truck runs just fine, doesnt seem to lack power, EGT's are normal ( 4-700 around town, 6-900 with a 4000 lbs load). when i step on it, it will start to boost around 15-1700 rpm and im at the top end of the gear when it peaks at 8 psi.
I tried to test my system using a home-made setup from Izzy351 in another post, in which the system is compressed with air to help locate leaks. i noticed that my system wasnt holding the air, but i didnt find the leak anywhere. i checked the boots around the intercooler, the intake side of the turbo and i found nothing. any help??
Thanks for looking!!
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
When trying to pressurize the system it will continually sounds like your filling a tire. It never stops. I was going through the list with mine earlier in the year checking things out myself. I was concerned my 15-17 was a problem. This was my list of things to check. I never did find anything wrong.
Could be:
Waist gate
Intake hose collapsing
Clogged air cleaner or a Squirrel in you intake
Compressor manifold hoses leaking
Turbocharger turbine or compressor wheel damage
Leak in Up-pipes.
Fautly Gauge
Could be:
Waist gate
Intake hose collapsing
Clogged air cleaner or a Squirrel in you intake
Compressor manifold hoses leaking
Turbocharger turbine or compressor wheel damage
Leak in Up-pipes.
Fautly Gauge
Thread Starter
|
Freshman User
Joined: May 2008
Posts: 33
Likes: 0
im not sure, i was using an air valve with the gauge on the handle, usually doesnt engage till about 10 psi. i could watch the intake hose inflate then slowly deflate when i stopped putting air in it. couldn't hear, feel or see anything. i did it about 3 times and nothing. this weekend im going to tear it all down and clean/inspect all the piping(along with a CCV mod).
Danskool stats that it will never fill up, how did yours work out?
Danskool stats that it will never fill up, how did yours work out?
Thread Starter
|
Freshman User
Joined: May 2008
Posts: 33
Likes: 0
well, ive been inspecting my intake here and there, waiting for the weekend so i have the time to tear it apart. i took off the air box tube and looked down at the comp wheel ( couldnt get the turbo intake tube of easly, so its staying on till sat ) and the wheel looks a little used. the edges were round and smooth, none cracked or broken that i could see. would that be enough to drop my boost from 22 psi to 8 psi? and could a wicked wheel correct it?
Thanks
Thanks
Posting Guru
Joined: Jan 2007
Posts: 2,174
Likes: 1
From: Millersburg, OR
Check where your boost gauge is hooked up. I had a slight tear in my line where it was hooked to the map sensor line. That was enough to show that my boost was low.. but the truck still ran great?? You could also have a kink in it... it is real easy to kink if you have the hard plastic boost line... so just one more thing to check...
Trending Topics
Thread Starter
|
Freshman User
Joined: May 2008
Posts: 33
Likes: 0
i took my saturday to check my system, i removed all the rubber boots, inter cooler tubes, hose for the MAP/gauge and found nothing wrong. everything was cleaned and inspected before i put it back togather. the lines for the MAP were a little loose due to the oil build up, but i cleaned and zip tied them just to make sure. also, i put a 6637 on it, i can hear the turbo build up and realse when i let off. i think now ill replace the MAP hose, gauge hose, gauge, and then a WW and hopfully fix something.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread Starter
|
Freshman User
Joined: May 2008
Posts: 33
Likes: 0
well folks, im excited to say ive fixed my problem!! i wanted to drop by and give a report ( in case someone else has a boost problem ) so far, i did a 6637 filter, ccv mod, cleaned and inspected most of the intake parts, tested my gauge and hose and spent hours online looking for answers. now what gave it away, i was reading a post about boost and it said to take the red hose off the waste gate, plug it and compare boost from when it is hooked up. i did this, and 2nd gear about 3/4 through the throttle, my CEL goes off. Which throw up a red flag instantly. My MAP is getting the boost, my gauge and hose work, leaves only one thing!! it was the little plastic "T" that came with my boost gauge!! A quick stop by home depot and sure enough, works like a chram now.
but more importantly, i want to thank the members that gave me ideas and paths, and that helped me instead of complained about how i should research things until i find the answer. The best way to find answers is to ask, and thanks to the knowledge and experience of you all, i have my answers and learned alot.
but more importantly, i want to thank the members that gave me ideas and paths, and that helped me instead of complained about how i should research things until i find the answer. The best way to find answers is to ask, and thanks to the knowledge and experience of you all, i have my answers and learned alot.
Go Bills !
Joined: Jan 2008
Posts: 2,778
Likes: 65
From: Buffalo, NY
Nicely Done. As Jim said thanks for posting up the findings. Sometimes there isn't enough of that. I read about problems, but the thread stops. The solution was never posted. And i think. Drat, what was the fix for my future reference. Good job trouble shooting.
Thread
Thread Starter
Forum
Replies
Last Post
superduty4x4
1999 - 2003 7.3L Power Stroke Diesel
68
Nov 19, 2008 01:09 PM
rosa70
1999 - 2003 7.3L Power Stroke Diesel
18
Jun 17, 2004 10:12 PM
