johnboneske
Full Access Members
I have a 2003 Expy EB. It has a 5.4 in it, just turned 192k. For the last month or so, it feels like it has no power. None! When it is coming up to temp it seems better, but when fully warm, the engine feels flat.
I replaced all the coil packs and installed iridium Bosch plugs in it, cleaned the throttle body, cleaned the MAF sensor (with same cleaner) too. Air filter is clean. No check engine light, no flashing ses light nothing...
The drivers side front CAT honeycomb inside is loose. It rattles around unless under load, then it stops. I looked and it has 4 cats on it. Is it a clogged exhaust? I don't want to get rid of it. I love the truck, it just runs like poo-poo!!
For those who have done it, can I replace the CATS with aftermarket ones, and only get 2 of them. I notice the back 2 CATS, are after all O2 sensors, or are they resonators? I do have an aftermarket dynomax muffler on it.
Please help! I live in Columbus Ohio if anyone is near by...?
I replaced all the coil packs and installed iridium Bosch plugs in it, cleaned the throttle body, cleaned the MAF sensor (with same cleaner) too. Air filter is clean. No check engine light, no flashing ses light nothing...
The drivers side front CAT honeycomb inside is loose. It rattles around unless under load, then it stops. I looked and it has 4 cats on it. Is it a clogged exhaust? I don't want to get rid of it. I love the truck, it just runs like poo-poo!!
For those who have done it, can I replace the CATS with aftermarket ones, and only get 2 of them. I notice the back 2 CATS, are after all O2 sensors, or are they resonators? I do have an aftermarket dynomax muffler on it.
Please help! I live in Columbus Ohio if anyone is near by...?