ton van der sluijs

Hi there overseas
My F150 is the first American truck in my life... When you engage the ignition sprout plug, the ignition reads 20deg. with a strobe... with the plug unplugged, you can adjust it on 10 deg BTDC. When you engage the plug, is the ignition really 20 deg advanced??? That wouldn't be good for the bearings if so... Or is the combustion so slow???
who can tell me??


greetzzzz Ton

luckythirteen13

that is correct, its actually 20* advanced....which isnt much. at WOT depending on tuning you can be as much as 35* advanced with no damage being done

ton van der sluijs

thanks for your reply... Okay, it's the way it is... European engines do have their ignition at static point at 6 to 9 degrees. My old Bee Em motorcycle ignites at 6 BTDC... when I adjust it at 8BTDC, my kickstarter slams nearly my foot off.


all the best

Ton

Kattumaram

The initial timing for the 4.6L with the spout connector removed is 10 degrees BTDC. I don't see the 5.8L being much different...20 degrees is quite excessive, if it is actually advanced that much.

My experience with the 5.0L OHV V8, non-electronic, was to set initial timing to 10-12 degrees BTDC with an additional 24-26 degrees centrifugal advance all in by 2000 rpm. Vacuum advance was usually set around 10-12 degrees at about (-)10in/hg manifold pressure.

The electronic engine control in your truck will have the right strategy flashed into PCM memory. I'm quite sure, but not certain, the initial timing should be 10 degrees BTDC.

ton van der sluijs

Goodmorning Mr Kattumaram how are you and your lady doing?
To me it seems strange ,20 BTDC but I askes the Ford/USA specialist and he said that without the sproutconnector 10 deg. is right, but he didn't had the answer why it gave 20 with the connector on. The truck runs great on it ( exept that I have to regrind the valveseats).
When I blocked off the EGR, all the coal dissapeared from the valves, therefore came the next failure "out of the closet" ; the weak valvesprings. The coal has damaged the inletseats from cil no6 and 7 , and they are blowing back in the inletmanifold and the MAPsensor noticed that. result is a powerfull engine who shudders when climbing a slope because all that combustion drops the vacuum for a second.

all the best to you and your lady
Ton