BlueDemon302
New Member
- Joined
- March 16, 2017
- Messages
- 3
- Reaction score
- 0
- City, State
- Vancouver WA
- Year, Model & Trim Level
- 1993 Explorer XLT 2X4
Hello all, I have been putting this off for too long.
I will try to keep this short, please, any help is welcomed!
I inherited my Grandfathers 93 XLT 2X4 Explorer a few years back. drove it once in awhile. Finally, having some money available, it needed a lot of TLC. Since day one, it has run a tiny bit rough, just enough to let you know. Then, last august, drove to work, just fine. Then, just after I fired it up to go home, starts running really rough, lack of power, almost sounded like it has a "dead hole" and the exhaust pipe seems to "pulse" its "regularly irregular" like its "missing" and the exhaust smells... "normal" the rough running is noticeable even at part throttle/cruise, you can feel the roughness in the seat of your pants.
Threw check engine light, for the IAT sensor out of range. Well, I had replaced it several months before, and it was under warranty. Got a new one, still ran very rough, and check engine light is gone, and HAS NOT RETURNED. Since then, I have tested and replaced TONS of stuff and STILL haven't fixed it. I went online, found an original, dealership mechanic issue "powertrain and emissions control diagnostics" book, and a "engine and power train mechanical" book to assist with diagnostics.
I have driven the truck a few times, around town, highway, etc to attain proper operating temp, to see if it goes away.
Before the incident, like at least 2 months, and a maximum of 12 months, I did various repairs the truck needed.
Replace radiator, hoses, thermostat, waterpump, fuel pump, Evap purge solenoid, all intake manifold gaskets,
Here is the list of things I have checked and tested ok trying to fix this issue:
IAC, TPS, EGR, EVR, DPFE, FPR, ECT, Coil Pack, ALL vacuum lines, no leaks.
Replaced Since incident with new parts
Spark plugs, plug wires, O2 Sensors, Gas Cap, fuel injectors, PCM.
Tested/replaced/ swapped with junkyard parts to check for changes in how it runs, with no changes.
ICM, MAF, CKP, CAS,
Im not sure where to go next. I did Seafoam the intake, and I got "Seafoam Fog" from the BACK of the engine bay, way before I saw the Fog exit the exhaust pipe at rear of vehicle. Clogged exhaust? I did a vacuum test this evening, and seems like its ok-ish, holding steady at about 18lbs, (spec is 16+) but I might have a restricted exhaust. Going to try to drop the Catalytic Converter Assembly (Thank you california!) and inspect for clogs tomorrow maybe.
Does anyone have ANY suggestions on what to do next?! I am at an absolute loss here.
I will try to keep this short, please, any help is welcomed!
I inherited my Grandfathers 93 XLT 2X4 Explorer a few years back. drove it once in awhile. Finally, having some money available, it needed a lot of TLC. Since day one, it has run a tiny bit rough, just enough to let you know. Then, last august, drove to work, just fine. Then, just after I fired it up to go home, starts running really rough, lack of power, almost sounded like it has a "dead hole" and the exhaust pipe seems to "pulse" its "regularly irregular" like its "missing" and the exhaust smells... "normal" the rough running is noticeable even at part throttle/cruise, you can feel the roughness in the seat of your pants.
Threw check engine light, for the IAT sensor out of range. Well, I had replaced it several months before, and it was under warranty. Got a new one, still ran very rough, and check engine light is gone, and HAS NOT RETURNED. Since then, I have tested and replaced TONS of stuff and STILL haven't fixed it. I went online, found an original, dealership mechanic issue "powertrain and emissions control diagnostics" book, and a "engine and power train mechanical" book to assist with diagnostics.
I have driven the truck a few times, around town, highway, etc to attain proper operating temp, to see if it goes away.
Before the incident, like at least 2 months, and a maximum of 12 months, I did various repairs the truck needed.
Replace radiator, hoses, thermostat, waterpump, fuel pump, Evap purge solenoid, all intake manifold gaskets,
Here is the list of things I have checked and tested ok trying to fix this issue:
IAC, TPS, EGR, EVR, DPFE, FPR, ECT, Coil Pack, ALL vacuum lines, no leaks.
Replaced Since incident with new parts
Spark plugs, plug wires, O2 Sensors, Gas Cap, fuel injectors, PCM.
Tested/replaced/ swapped with junkyard parts to check for changes in how it runs, with no changes.
ICM, MAF, CKP, CAS,
Im not sure where to go next. I did Seafoam the intake, and I got "Seafoam Fog" from the BACK of the engine bay, way before I saw the Fog exit the exhaust pipe at rear of vehicle. Clogged exhaust? I did a vacuum test this evening, and seems like its ok-ish, holding steady at about 18lbs, (spec is 16+) but I might have a restricted exhaust. Going to try to drop the Catalytic Converter Assembly (Thank you california!) and inspect for clogs tomorrow maybe.
Does anyone have ANY suggestions on what to do next?! I am at an absolute loss here.
