Check engine light ON

[dukey_78]

Well heres the deal my truck has 199000 miles on it but still runs awesome but ne ways when i get on my truck all out once it hits between 80 and 90 the service engine soon lite pops on let off the throttle get down to highway speed and hold it steady it just goes off in like a mile or 2 i was just wondering if ne one had ne input?

[kefier2001]

I am having same issues. Some people posted they think it is an overboost condition?! Thats about all I can help with. My truck sometimes does the same thing!

[Marty]

Mine does it too.. Go to AutoZone and get the codes pulled. Then either post them up and have someone tell you what they mean or search here for it.

After you go to that page, click the button "CTRL" then just afterwards while still holding that button hit the "F" key. Then type in your code and it should take you to it.

Hope this helps...

[stump0331]

take it by autozone they can see if u have any codes, that will help alot with diagnosis

[Marty]

Originally Posted by kefier2001

I am having same issues. Some people posted they think it is an overboost condition?! Thats about all I can help with. My truck sometimes does the same thing!

Overboost is one of them. Here is a picture of my boost(top)/trans temp(middle)/egt(bottom) at WOT for about 10 seconds and rolling at about 100mph ...

BOOST - 28psi
TransTemp - 140*F
EGT - 1080*F

[dukey_78]

i have scanned my truck with a snapon solius and nothing. no codes thrown and no pending codes.