help fast

[JGS107]

well i got home today and at idle my truck started puttering real bad...it has never done this before and i have no idea what is wrong with it.my mods are 2.8 upper,#5 lower,volant intake,catless exhaust with flowmasters,boost bypass, and a diablo dyno tune.its tuned around 11.8:1 and 19 degrees of timing...it was a really hot day.well lastnight i ran my best time ever at 12.78.found out my intake is restricting a lot of air.i took it off and it made a world of difference but now i am thinking it has messed my tune up and my timing is off.i dont have a wideband so i cant tell you what my air fuel is at right now.is there anything i can do with my predator to troubleshoot this problem...i really dont want my motor to blow up.please help me

jason

 

[LIGHTNING LARRY]

When did you last get gas?

NO, not you. The truck.

 

[JGS107]

yesterday...i need to get some today thats for sure

 

[LIGHTNING LARRY]

yesterday...i need to get some today thats for sure

You might have some bad gas.

 

[JGS107]

it doesnt feel like its out of gas...my exhaust makes a putter noise at idle.the truck runs fine while moving it seems but as soon as i stop it makes this rumble

 

[JGS107]

ill go try and get some gas real quick and see if thats it...im hoping so.thnaks larry for your quick help.thanks a lot

 

[Cichlids]

If it is the gas the they are liable for all repairs. It has happend to me and they had to pay for all of the labour and cost fixing it.

 

[LIGHTNING LARRY]

ill go try and get some gas real quick and see if thats it...im hoping so.thnaks larry for your quick help.thanks a lot

How many miles on your L?

 

[JGS107]

25000

 

[JGS107]

25000 but its modded enough beyond warrenty but i could get it all taken off

 

[LIGHTNING LARRY]

When was your last fuel filter change?
Should be changed every 6-8,000 miles.

 

[JGS107]

my problem is i ran it at the track lastnight...if the gas was bad then it really messed things up.im thinking that i didnt have a winter tune and it dropped temperatures to about 68 degress out that my air fuel is off.it is idling a little higher than normal and my exhaust is puttering.when i drive it.the truck is fine even when i get onn it.its not til its sitting and idling that it does it

 

[JGS107]

When was your last fuel filter change?
Should be changed every 6-8,000 miles.

never changed my fuel filter...didnt know it had to be done that regularly

 

[LIGHTNING LARRY]

never changed my fuel filter...didnt know it had to be done that regularly

DO IT! ;-)

 

[SVTFREEK]

Make sure you cheack all hose, like the one going to the under side of the intake boot, I beleive if those come loose it can cause an idle problem like that.

Maybe coils and plugs :shrug:

 

[JGS107]

how hard is it to do

 

[SVTFREEK]

DO IT! ;-)

:thumbsup: that could really do it.

 

[Nvr_Spds]

CHANGE IT!! I change mine every time i change my oil, just because i have a hookup at ford, for filters.

 

[JGS107]

where is the filter at in these trucks since i never bothered with them before.

 

[LIGHTNING LARRY]

Frame rail under the driver's side door.