power loss

gusto · #1 Tue, April 26th, 2011, 01:15 AM

I have a question about my 08 5.4L supercrew. I have a Gryphon with custom tunes and a afe CAI along with a 3" magnaflow SOS. I recently was driving and stopped at a light and when i pulled away at the green the truck had a power loss and sounded like a quiet diesel. I pulled over and shut it down and when i started it up it went away. This has happened twice now but a month apart. any ideas or answers? please help
Thanks

ticopowell · #2 Tue, April 26th, 2011, 02:14 AM

Did you see any lights or pull any DTC's? if not, try and get them before you turn the truck off, then write them down and post them, that will help diagnose the problem.

***Longshot270*** · #3 Tue, April 26th, 2011, 11:39 AM

Did you have any lights come on? There probably aren't any codes if it went away after you turned the truck off? Go ahead and check for codes though. I think it has happened to me once but it was before I had the gryphon to check codes.

gusto · #4 Wed, April 27th, 2011, 01:37 AM

no lights or codes but i just crawled under and noticed a small oil leak and checked the oil and it was down a quarter. I am unsure what it is.

ticopowell · #5 Wed, April 27th, 2011, 01:43 AM

I had a truck that the only oil leak was from a bad oil drain plug.. might check that or any other seals that are easily visible from underneath... some might be a simple fix, others not so much... but that shouldn't have any effect on the power situation.
I've never had the power loss situation so I can't help too much more than that... good luck and I hope we figure it out!

***Jackpine*** · #6 Wed, April 27th, 2011, 09:42 PM

I agree, an oil leak won't cause a power loss, not at 1/4 quart low.

This really sounds like "limp home mode". I can't understand why you did not get a Check Engine Light or any codes though.

Was it possibly at the same spot each time? Other users have noted flaky performance when driving under a high voltage power line. Do you know if this could be a factor?

- Jack