Cheezno6
Well-Known Member
- Joined
- Jan 22, 2010
- Messages
- 48
- Vehicle Year
- 86
- Transmission
- Automatic
Be careful with that Lucas top end lube, if your cat is starting go (like it sounds) that stuff will kill it for sure. Any Ford with over 100K can have a bad cat and they don't all fail the same, some go slow some all at once. I had a 91 F350 7.5 ltr w/125K on it. Went to the gym one morning ran just as fine as it always did two blocks down the road on the way to work it stalled and wouldn't re-start. Towed it to buddies shop and the scan said everything was bad typically a bad ECM. On the way over there the tow truck driver told me his friend had a Ford truck act the same way and it turned out to be the cat, so for the heck of it I dropped the cat and VIOLA! it started right up and all the codes cleared. I never would have thought cat unless that guy had said that. Check your trucks exhaust velocity at idle and at 2K rpm. If there isn't much of a difference your cat is going south (or you ahve a seriously clogged muffler). If you don't have emissions there cut it out the truck isn't OBDII so it won't matter to the ECM if it's gone. Your problem could be two fold. If the truck was running lean due to fuel problems it probably screwed up the cat as well. If you have to have a cat there are plenty of good after market high flow ones out there for resonable prices
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