some help with codes please!!
Thread Starter
|
Posting Guru
Joined: Nov 2007
Posts: 1,521
Likes: 0
From: Tupelo,Ms
some help with codes please!!
ok 2 nights ago we installed a 4" turbo back magnaflow system with the muffler and i noticed after the install it almost sounded like i had a "tapping" at idle i didnt hear with my stock straight pipe. so i scanned for codes on the way home and i found two here they are 1. PO478 2. PO470. now both said they were exhaust codes so im wondering if the computer is "sensing" a difference in my system? if so is it a bad thing?. also about the injector deal i went under my real time data window and found the injector control volt reader thingie (diablo predator) and it was at 1.52 at aprox. 1600 rpm and about .80-.90 at idle is that normal? im gusin thats the ICP sensor.. thanks for the help guys
(edit) forgot to add that i do have like two lil rust holes in my EBP tube
(edit) forgot to add that i do have like two lil rust holes in my EBP tube
Senior User
Joined: Mar 2007
Posts: 473
Likes: 3
From: Issaquah, WA
Tapping at idle? Certainly the new exhaust should not have affected the motor. Check that the downpipe and exhaust are not contacting the frame. Take a close look at the bolts at the front cross member.
Fix you EBP tube and I bet your codes go away.
Fix you EBP tube and I bet your codes go away.
Thread Starter
|
Posting Guru
Joined: Nov 2007
Posts: 1,521
Likes: 0
From: Tupelo,Ms
well i listend to it at idle just a lil bit ago and it sounds like its coming from the driver side of the motor could it be the legendary "no 8" noisy injector and if so what can i do.. anything that ford will do? i am bout to start diesel school so having to tools wont be a problem thanks
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
You can probably clear both of the exhaust codes be replacing the EBV tube. That might also cure the tapping noise.....but it isn't uncommon to notice a little valvetrain noise after freeing up the exhaust. If that is what it is.
It doesn't sound to me like it's anything to get too worried about.
It doesn't sound to me like it's anything to get too worried about.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
i did notice about a 200deg. temp drop in egts
If you have a LL in the #8 hole and it's ticking....it's still not a real problem. People have put hundreds of thousands of miles on LL injectors and never even known they were there. I put 144,600 on my LL8 with it ticking all the while....it was never an issue.
Trending Topics
Thread Starter
|
Posting Guru
Joined: Nov 2007
Posts: 1,521
Likes: 0
From: Tupelo,Ms
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
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
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
the 478 most likely wont go away. that means the pcm is seeing a higher than expected backpressure level. 99.9% of the time that means the ebp sensor is damaged from soot and moisture and needs to be replaced. the brass internals corrode and cause the sensor to send false signals. the codes will have no effect at all on performance. unless you really want to replace the sensor, just ignore the codes. i wuold however, repair the exhaust leak.
Thread
Thread Starter
Forum
Replies
Last Post
Tyler Roberts
1997 - 2003 F150
1
Sep 22, 2014 12:40 AM
kristilynne612
Explorer, Sport Trac, Mountaineer & Aviator
14
Jan 14, 2010 11:12 AM