100mph and possible backfire
- Thread starter atkonkler
- Start date
fivetodrive
CRISPY
Re: 100mph and possible backfire
Dont go over 100... Your truck dosent like it!!!
Dont go over 100... Your truck dosent like it!!!
sytyguy
Moderated User
Re: 100mph and possible backfire
3rd gear or 4th?
Got a scanner/datamaster/tunerpro? Hook it up and record when it happens. Even though our trucks are limited to 126mph, I have seen some cut early. The other consideration is that you're hitting the rev limiter in 3rd (hence why I asked what gear above).
Aside from that, your ignition could be getting weak. 3rd and 4th gear put more load on the engine at a specific rpm/boost than 1st and 2nd, so while the issue might not occur at high rpms in lower gears, it could show itself in the higher gears.
3rd gear or 4th?
Got a scanner/datamaster/tunerpro? Hook it up and record when it happens. Even though our trucks are limited to 126mph, I have seen some cut early. The other consideration is that you're hitting the rev limiter in 3rd (hence why I asked what gear above).
Aside from that, your ignition could be getting weak. 3rd and 4th gear put more load on the engine at a specific rpm/boost than 1st and 2nd, so while the issue might not occur at high rpms in lower gears, it could show itself in the higher gears.
atkonkler
Is this your bush?
Re: 100mph and possible backfire
Just did plugs, cap rotor etc , it gets it at 6k usually. I'll have to hook it up and record and post it I think it's hitting the 3rd to 4th shift to be honest but just wanted to know if anyone has seen this before. I have al the tuning stuff and computer from you hood. I just gotta hook all the moates stuff up.
Just did plugs, cap rotor etc , it gets it at 6k usually. I'll have to hook it up and record and post it I think it's hitting the 3rd to 4th shift to be honest but just wanted to know if anyone has seen this before. I have al the tuning stuff and computer from you hood. I just gotta hook all the moates stuff up.
dgoodhue
BuSTeD 4.3
Re: 100mph and possible backfire
Shift at about 4600 which should be around 98/99mph.
Shift at about 4600 which should be around 98/99mph.
ItsMyTy
Life is beter at 25 PSI
Re: 100mph and possible backfire
This is not correct.
SyTy stock trans is supposed to have a WOT 3-4 upshift.
This is not correct.
SyTy stock trans is supposed to have a WOT 3-4 upshift.
dgoodhue
BuSTeD 4.3
Re: 100mph and possible backfire
I have raced 3 SyTy with a SyTy transmission that don't do the wot 3-4 shift if left in OD. (2 of then mine). They have all done if I shift D to OD. I know of many other like this as well.
I have raced 3 SyTy with a SyTy transmission that don't do the wot 3-4 shift if left in OD. (2 of then mine). They have all done if I shift D to OD. I know of many other like this as well.
atkonkler
Is this your bush?
Re: 100mph and possible backfire
When I drive in D and its coming to a stop it really downshift@ hard... Anyone one else get harder downshift when in D vs Od? What's the advantage of being in D when racing? Better shift on the ladder, torque converter engaged all the time?
When I drive in D and its coming to a stop it really downshift@ hard... Anyone one else get harder downshift when in D vs Od? What's the advantage of being in D when racing? Better shift on the ladder, torque converter engaged all the time?