Mighty Max Help.....

PapaBear · 02-27-2013, 10:18 PM

Well, the ole gal finally gave up the ghost, about 400 miles after she turned 325k miles old......and I need some help.

I drove it to work yesterday, and all was fine. When i left to go to school, it was running a little weird, a little low on power. Got to Moncks Corner, and it was a little more sluggish. When I left school, it was worse. It was super slow, and would bog down if I floored it. It was running fine, other than the sluggishness, no noises or skipping or anything weird other than low on power. I also noticed that it was burning gas WAY more than normal.

Got to 526 and it got really bad, but I had to get home. Wife and baby home sleeping, and I had to work at 5AM so I pressed on thinking it was a bad catalytic converter (seen this before). I made it to Duncan's boat harbor bridge and I had to pull over. It wouldn't go over 50 MPH and didn't want to go up the hill. I unbolted the cat on the side of 526 and it was the same so i got a ride home.

Read on a forum about there being a cat INSIDE the exhaust manifold taht would cause this, so I went back to the truck today and pulled the manifold and gutted it. Put back together and same deal.

It will idle really low, but when given gas it just gets worse, and won't rev up. So I had it towed home. Changed the fuel filter and same deal.

I have changed plugs/wires/cap/rotor, cleaned MAF, fuel filter, air filter, gutted cats, all to no avail.

Any advice? Where to start? Thanks

02-27-2013, 10:18 PM	#1
PapaBear Senior Member Join Date: Aug 2010 Posts: 2,809	Mighty Max Help..... Well, the ole gal finally gave up the ghost, about 400 miles after she turned 325k miles old......and I need some help. I drove it to work yesterday, and all was fine. When i left to go to school, it was running a little weird, a little low on power. Got to Moncks Corner, and it was a little more sluggish. When I left school, it was worse. It was super slow, and would bog down if I floored it. It was running fine, other than the sluggishness, no noises or skipping or anything weird other than low on power. I also noticed that it was burning gas WAY more than normal. Got to 526 and it got really bad, but I had to get home. Wife and baby home sleeping, and I had to work at 5AM so I pressed on thinking it was a bad catalytic converter (seen this before). I made it to Duncan's boat harbor bridge and I had to pull over. It wouldn't go over 50 MPH and didn't want to go up the hill. I unbolted the cat on the side of 526 and it was the same so i got a ride home. Read on a forum about there being a cat INSIDE the exhaust manifold taht would cause this, so I went back to the truck today and pulled the manifold and gutted it. Put back together and same deal. It will idle really low, but when given gas it just gets worse, and won't rev up. So I had it towed home. Changed the fuel filter and same deal. I have changed plugs/wires/cap/rotor, cleaned MAF, fuel filter, air filter, gutted cats, all to no avail. Any advice? Where to start? Thanks