reggiesbush
NAXJA Forum User
- Location
- Seattle
Hello,
96 Cherokee Sport
Background, cat had been blocked for a little bit. The car started to lose power under load and would occasionally start to choke out while idling at a stoplight or traffic etc. So I dropped the cat and ran it without exhaust for a few days while waiting for the new system. Car ran extremely poorly, but randomly. I could drive for 10-15 miles then it seemed like a cylinder was misfiring and the car would shudder and lose power. Seemed especially prone at high speeds, but pulling over/turning the car off seems to occasionally fix it.
Since then I have added exhaust system, still no cat (backordered), and replaced spark plugs and wire. Old spark plugs had a reddish orange color to them like the car was running lean and a little carbon fouling, but nothing egregious. That seemed strange since I thought a clogged cat would make the car run rich. It seemed great for a few days, but just now I was letting the car idle and after 3-5 mins it started to run really rough and almost dying. Car was parked in a sloped driveway, and car seems to have most issues when going up an incline. I am thinking maybe I need way hotter spark plugs? Other idea is the O2 sensor is not reading anything other than open air, but I have searched and that doesn't seem to be a major issue.
Went from Champion RC12LYC to NGK FR5-1 7252 for the spark plugs.
Any help is appreciated.
96 Cherokee Sport
Background, cat had been blocked for a little bit. The car started to lose power under load and would occasionally start to choke out while idling at a stoplight or traffic etc. So I dropped the cat and ran it without exhaust for a few days while waiting for the new system. Car ran extremely poorly, but randomly. I could drive for 10-15 miles then it seemed like a cylinder was misfiring and the car would shudder and lose power. Seemed especially prone at high speeds, but pulling over/turning the car off seems to occasionally fix it.
Since then I have added exhaust system, still no cat (backordered), and replaced spark plugs and wire. Old spark plugs had a reddish orange color to them like the car was running lean and a little carbon fouling, but nothing egregious. That seemed strange since I thought a clogged cat would make the car run rich. It seemed great for a few days, but just now I was letting the car idle and after 3-5 mins it started to run really rough and almost dying. Car was parked in a sloped driveway, and car seems to have most issues when going up an incline. I am thinking maybe I need way hotter spark plugs? Other idea is the O2 sensor is not reading anything other than open air, but I have searched and that doesn't seem to be a major issue.
Went from Champion RC12LYC to NGK FR5-1 7252 for the spark plugs.
Any help is appreciated.
