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Squishy
05-02-2005, 01:04 AM
well i had the truck out all weekend, it worked awesome, except for today when i experienced detonation. i have not checked the timing on it yet, but i will probably do that soon. it was not heating up crazy(i think it hit 190tops on the cheep hastings gauge, but when i poped the hood, the heat from the motor was pretty warm). It has never detonated on me before, and it kinda scared me at the timehttp://instagiber.net/smiliesdotcom/contrib/edoom/Smoker.gif.

i am going to be replacing the thermostat with a 160* failsafe


anyone have any ideas of what it could be or what to check?
__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

ShortStack
05-02-2005, 02:09 AM
Timing, sounds like your fuel is combusting at the wrong point of ignition, probably lean. :D I'd check soon tho before you chuck a rod or piston.

Should probably check for vacuum leaks at the same time, to be safe.

Whats your compression at?


~Jaime~
77 K5 - Big, black, ugly and all mine :)

brandonf250
05-02-2005, 02:09 PM
shitty deal,that sucks!

Squishy
05-02-2005, 05:02 PM
its not running lean, going to do the timing before it comes out next, cant find any vacuum leaks.

190* does not sound too high to cause detonation, so i am also thinking timing now, but who knows?

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

lizard
05-02-2005, 05:11 PM
don't all fords detonate??? as in BOOM!




I'd only run a 190 for aircare, 160 would be my choice, if u have any kind of decent compression that extra 30 makes a differance...OR run better gas

Broncoo
05-02-2005, 05:22 PM
the efi won't run right without at least a 180* t-stat reason for that is the colant temp sensor will be tricked into thinking the engine is still warming up and will feed more fuel causing a rich condition

btw the stock t-stat is 192*

maybe you skipped the timing chain?



trying to get where i want to be

for sale:
3 ford np203-205 doubler adapters $480 each OBO!!!

Squishy
05-03-2005, 03:48 PM
hmm.... thats interesting about the thermostat. i dont think it skipped a tooth on the timing chain(118000km's) but if it did will bumping the timing ahead fix the problem for now? or do i need to pull the waterpump? is there any way i can check to see if it skipped ahead without ripping the motor apart?

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Broncoo
05-03-2005, 05:42 PM
what i do to see if the chain is skipped is put the #1 cylinder at TDC then check to see where the rotor is in the cap you should be able to tell from there if it has moved or not

Crane roller timing sets are only $112 at lordco

trying to get where i want to be

for sale:
3 ford np203-205 doubler adapters $480 each OBO!!!

Squishy
05-03-2005, 06:09 PM
so i could advance or retard the timing then until the chain skipps again?

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Broncoo
05-03-2005, 06:24 PM
yeah but you run the risk of busting it in half. done it a few times on a few different engines

sup to you

trying to get where i want to be

for sale:
3 ford np203-205 doubler adapters $480 each OBO!!!

Squishy
05-03-2005, 07:42 PM
busting what in half?

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!