05-12-2014, 02:04 PM | #1 |
Registered User
Join Date: Jun 2005
Location: Oregon
Posts: 41
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issue but no codes.
2005 2500hd 6.0 4l80e 4x4 - stock except 285/70/17 tire and wheels.
52k, purchased new. No cel. No codes. Perceived lack of power. Still goes but seems flat. Terrible MPG. (6.8 in town.) Sounds "congested" to me for a lack of better term, but OK from the back. What would cause something like this and not throw a code? Of coarse I can't find a competent shop. I must have sucker written on my forehead. Give me some ideas!?! |
05-12-2014, 06:47 PM | #2 |
Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: issue but no codes.
Have the catalytic converters checked with a pressure gauge "pre converter", Under full throttle there shouldn't be over 1-2 psi of back pressure.
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