every once in a while my truck tries to die...some of the times it does when i come to a stop...never used to do that..i have long tubes cai rocker arms and a tune. ne suggestions? it didnt start doing it until about a month ago.. truck has 40000 miles.

 

check and clean your throttle body. i had mine in the shor twice in the same day for this reason and 4 times before that. the service guy said there was nothing wrong with it it died goig down the highway once too. they cleaned my throttle body and did something else i have no clue what they wouldnt tell m since i threatened to kick his ***. lol no my truck runs idles and drives better than before i bought it.

 

I'm having the same problem, have cleaned the tb, maf, air filter, checked plug wires and it still does it. My tuner thinks it's a pcm on it's way out (mail-order tune) so I'm getting a replacement under warranty and will see what happens.

 

would brake clean mess up the maf?

 

it shouldnt brake cleaner is mostly alcohol under pressure with a slvent mixed in you should be good to use that. have you had your ignition switch looked at and tested??

 

I think contact cleaner is usually used on the MAF, but brake cleaner is probably just about the same stuff.

Is your tuner local, or do you have access to HP Tuners or EFI Live to scan it?

Is it sputtering then dying, or just cutting out like you turned the key off?

 

it kinda just idles way down then dies not really ne sputtering just kinda slowly turns off..i dont know how to put it.

 

and my tuner is 3 hrs away i dont know neone here with ne type of tuning material

 

mine does it to, its an 03 4.8 farely stock, with about 86k, i was told to clean out the tb and i did, seemed not to do it for awhile but now it still does it, it bounces real bad when just idling and drops to what seems like 3 rpms back to like 1200, then sometimes it dies, but im plannin on pullin the 4.8 out and puttin somethin bigger and better in, just want more time out of this one

 

you could try seafoam, my friends toyota would stumble when idling then die randomly. we seafoamed it and it been running alot better. that thing smoked more than any car ive done it too