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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 09-15-2010, 08:12 PM
Nally427 Nally427 is offline
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1989 F150 ignition timing

hey guys, i have a 5.0 EFI V8 and i was wondering if its possible for me to change the timing?? i hear you can get some horsepower and fuel economy by bumping up the timing a few degrees. i ask because im not sure if i can do it. i dunno if the trucks ECU controls all that stuff or what
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Old 09-15-2010, 08:16 PM
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polarismuddman polarismuddman is offline
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Yes, you can advance the timing a bit.....You'll need to pull the spout connector out of it's socket to do this...yours should be right next to the distributor...gonna want to advance it to somewhere around 14*...it will help to have a timing light.... Spout connector looks like this: Click the image to open in full size.
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1989 F250 7.3 IDI, ZF 5-speed,4wd, worn out pump turned up a few flats, timing advanced, PowerKing tires, Group 31 batteries.
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Old 09-16-2010, 12:55 PM
Nally427 Nally427 is offline
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once its out of the socket, how do adjust the timing?
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Old 09-16-2010, 01:38 PM
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Loosen the distributor hold down and turn the whole distributor counterclockwise(?) I can never remember, I always figure it out when I do it (I use a timing light)
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1989 F250 7.3 IDI, ZF 5-speed,4wd, worn out pump turned up a few flats, timing advanced, PowerKing tires, Group 31 batteries.
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Old 09-16-2010, 01:44 PM
fordboyf150 fordboyf150 is offline
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what do u think is the best degree to advance it too? i dont want spark knock haha
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Old 09-16-2010, 02:19 PM
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Quote:
Originally Posted by Nally427 View Post
once its out of the socket, how do adjust the timing?
.....First i would locate the timing marks on your balencer & clean them off good , you can rub some chalk or something on them to make them easyer to read , hook the timing light to the # 1 plug wire , passenger side front , remove spout start motor , point light at timing pointer & read timing , to turn the distributer you need to lossen the hold down bolt , turning it clockwise will advance the timing , counter clockwise will retard the timing , after setting it tighten the hold down bolt & install spout plug ....Lew
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Old 09-16-2010, 02:28 PM
Nally427 Nally427 is offline
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so you do all this while the truck is running??
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Old 09-16-2010, 02:34 PM
fordboyf150 fordboyf150 is offline
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Yepp. but i was always told to let the truck warm up before you remove the spout plug. when u remove it the truck will almost stahl, and dont worry thats normal. then begin your timing.
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Old 09-16-2010, 02:37 PM
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To set the timing it needs to be running , you can remove the spout & loosen the hold down with the motor off ...
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Old 09-16-2010, 02:47 PM
Nally427 Nally427 is offline
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yeah that makes sense. after all that, you can just shut it off and tighten everything back up then i guess
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Old 09-16-2010, 02:54 PM
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Yeah tighten the hold down then start it back up & check it again to make sure nothing moved .....
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Old 09-16-2010, 03:00 PM
Nally427 Nally427 is offline
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thanks alot. but i guess my last question about all this would be like whats the difference between advancing the timing and retarding it? do they have different effects?
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Old 09-16-2010, 03:00 PM
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As far as advancing the timing , most will tolarate 14 BTDC , some thing you have to play with , advance it some then take it for a ride , if you get any pinging then its to far advanced....
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Old 09-16-2010, 03:04 PM
Nally427 Nally427 is offline
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pinging from the engine?
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Old 09-16-2010, 03:08 PM
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Yes,,,.................
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Old 09-16-2010, 03:08 PM
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Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

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1989, 1997, 351, 49, 87, 89, advance, bronco, connector, f150, f250, ford, ignition, spout, timing, windsor

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