Wray-Wray
Well-Known Member
- Joined
- September 3, 2008
- Messages
- 111
- Reaction score
- 2
- City, State
- North Tonawanda NY
- Year, Model & Trim Level
- 99 Moutaineer 5.0L
From what I'm told about converters they go bad gradually, but when they go you'll know(I've honestly never had one go bad on me yet). Your O2 sensor is after the converters so your computer should give you a check engine light, because the sensor will not get correct readings anymore. It will triggering a problem.
Coil pack symptoms can be numerous in quantity. They are very temperamental when they go bad. They can function normally till they heat up and malfunction. They can work till a certain load and then stop working(example- they work fine till 3000rpms then they poop out). Or just plain stop working all together.
Generally you have a loss of power. Hesitation up threw the power band.
I had the same scenario as you. It seemed like gas wasn't flowing properly. it seemed like no fuel up threw my entire power band. I changed my fuel filter to no avail. Checked my fuel pressure and it was in spec. which led me to check for spark sure enough I had weak orange spark on 4 cylinders when I traced my wires all 4 weak sparks came from the same coil pack.(wires where brand new at this point) Swapped it with a unit I snached at a junkyard. About a month earlier when I was with a buddy grabbing **** for his Crown Victoria. BOOM problem fixed! I'm not saying this is your answer, but its worth a shot to check. The ****ty part was I had no check engine light to help me in the right direction.
Coil pack symptoms can be numerous in quantity. They are very temperamental when they go bad. They can function normally till they heat up and malfunction. They can work till a certain load and then stop working(example- they work fine till 3000rpms then they poop out). Or just plain stop working all together.
Generally you have a loss of power. Hesitation up threw the power band.
I had the same scenario as you. It seemed like gas wasn't flowing properly. it seemed like no fuel up threw my entire power band. I changed my fuel filter to no avail. Checked my fuel pressure and it was in spec. which led me to check for spark sure enough I had weak orange spark on 4 cylinders when I traced my wires all 4 weak sparks came from the same coil pack.(wires where brand new at this point) Swapped it with a unit I snached at a junkyard. About a month earlier when I was with a buddy grabbing **** for his Crown Victoria. BOOM problem fixed! I'm not saying this is your answer, but its worth a shot to check. The ****ty part was I had no check engine light to help me in the right direction.
