Timing on 5.0
Thread Starter
|
Freshman User
Joined: Jan 2007
Posts: 45
Likes: 0
Timing on 5.0
I have an 89 F-150 5.0 and i'm trying to get the timing set at a point i'm happy with. It ran terrible on 87 octane, and not too great on 89, so i was forced to run 91. I thought i'd try adjusting the timing to get it to run on cheaper gas, and maybe get a little more performance (if thats possible at the same time). I know its set at 10 degrees btc stock, and it was right on when i checked with the light. i decided to bump it up a little, and its right around 14-15 now if i understand it correctly. I noticed a pretty decent jump in acceleration after this, but it still runs better on 91. it makes a little different noise running 89 and i can tell over the sound of no muffler. i'm kind of in the dark about where to set it. i'd like it to run on cheaper gas if possible, and i'd like to see a little performance boost without burning through my cylinder walls. any input would be awesome. Thanks.
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
Originally Posted by bigsky22
Ii'd like it to run on cheaper gas if possible, and i'd like to see a little performance boost without burning through my cylinder walls.
Set it to 10 BTDC. That's what the motor is designed to run at. Anything more and you're risking detonation.
Post Fiend
Joined: Apr 2004
Posts: 6,473
Likes: 4
From: Lafayette, IN
There could be any number of more serious issues. Your timing chain could be wearing out, your engine could be full of carbon, you could have cracked heads, a sensor somewhere could be bad, etc.
Or it could be something simple like the distributor being off a tooth.
Jason
Or it could be something simple like the distributor being off a tooth.
Jason
Elder User
Joined: May 2007
Posts: 754
Likes: 1
From: Solon, Ohio
I have read in some older posts that after resetting the timing, and changing to the new lower octane gas, remove the negative battery cable for about a half hour.
This resets the computer and it relearns your engine and it's sensors.
It might idle or run funny the first few times you start, run and warm it up as the computer reprograms itself.
This resets the computer and it relearns your engine and it's sensors.
It might idle or run funny the first few times you start, run and warm it up as the computer reprograms itself.
Trending Topics
Thread Starter
|
Freshman User
Joined: Jan 2007
Posts: 45
Likes: 0
i may give that a try. the octane problem isnt anything serious. i know that because the truck rips for an 89 5.0. it hasnt been abused either. the only thing i think thats possible is an old timing chain. thanks for your inputs.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
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