daslowmoses
New Member
- Joined
- January 14, 2007
- Messages
- 3
- Reaction score
- 0
- City, State
- Clermont, FL
- Year, Model & Trim Level
- 93 X
Sorry for the long post, just wanted to include as much as possible.
Hello, I'm working on a relatives early `93 explorer (no egr) that stalls after it warms up. Rough idle, bouncy rpm's & likes to lunge forward before it stalls when in d. Will stay running w/ partial throttle. Pings, misses, hesitates under acceleration. Checked & changed the plugs (wrong plugs were installed about 6 months ago along w/ correct new wires), all plugs were about the same in condition; dry, black & covered in soot. Most of the time it spews black smoke & moisture out of the tailpipe when on the throttle & I've also seen fumes coming out of it while at idle. The muffler itself seems to radiate smoke, maybe there’s a hole in it somewhere but it just seems to be radiating through. I tightened down the intake manifold, cleaned the maf, iac, throttle body. vac lines look good, no bubbling from the radiator & oil looks fine. I'm about to run some seafoam through it. I tested the tps sensor, but only tested it at idle & got the .94 reading I was looking for. Is there any reason to run it through a range test or a different wire.
I just figured out how to pull the codes & got KOEO 159(MAF out of range) & CM 157(MAF signal low or grounded). KOER 116(engine coolant temp sensor out of range), 137 (O2 sensor not switching-system rich left or front HO2S- Fuel Control), & 538(no goose). I tried to heat up the engine for about 5 mins before the tests but I didn't want to go to long where it wouldn't make it through the test. I tried these tests numerous times to get the rhythm down, I tried to get the goose test each time. I think I got it once because I didn't get the 538 code, but I didn't get any other codes either besides the 116 & 137. I tried getting the cylinder balance test but it never took, never noticed anything, maybe this isn't a SEFI model; is it?. I got the negative disconnected now to see what codes come up after I reconnect.
I've been looking on this site just as much as I've been working on the truck, maybe more. I now need to find how to test the maf & O2 sensor. I'm also interested in the fpr & how to test it w/o a fuel pressure gauge. One question; why is there a ~2" hose connecting the pass exhaust manifold into the intake box, when do you want hot air in an engine?? What controls that? I want to disconnect it. I've also got some other ideas like fan clutch & some others. The mileage shows 80k, it seems like its 180 or 280 though but I think whatever problem they had before got a lot worse w/ the wrong plugs in it for the last 6 months. Thanks for all your help I've already found searching through this forum.
Hello, I'm working on a relatives early `93 explorer (no egr) that stalls after it warms up. Rough idle, bouncy rpm's & likes to lunge forward before it stalls when in d. Will stay running w/ partial throttle. Pings, misses, hesitates under acceleration. Checked & changed the plugs (wrong plugs were installed about 6 months ago along w/ correct new wires), all plugs were about the same in condition; dry, black & covered in soot. Most of the time it spews black smoke & moisture out of the tailpipe when on the throttle & I've also seen fumes coming out of it while at idle. The muffler itself seems to radiate smoke, maybe there’s a hole in it somewhere but it just seems to be radiating through. I tightened down the intake manifold, cleaned the maf, iac, throttle body. vac lines look good, no bubbling from the radiator & oil looks fine. I'm about to run some seafoam through it. I tested the tps sensor, but only tested it at idle & got the .94 reading I was looking for. Is there any reason to run it through a range test or a different wire.
I just figured out how to pull the codes & got KOEO 159(MAF out of range) & CM 157(MAF signal low or grounded). KOER 116(engine coolant temp sensor out of range), 137 (O2 sensor not switching-system rich left or front HO2S- Fuel Control), & 538(no goose). I tried to heat up the engine for about 5 mins before the tests but I didn't want to go to long where it wouldn't make it through the test. I tried these tests numerous times to get the rhythm down, I tried to get the goose test each time. I think I got it once because I didn't get the 538 code, but I didn't get any other codes either besides the 116 & 137. I tried getting the cylinder balance test but it never took, never noticed anything, maybe this isn't a SEFI model; is it?. I got the negative disconnected now to see what codes come up after I reconnect.
I've been looking on this site just as much as I've been working on the truck, maybe more. I now need to find how to test the maf & O2 sensor. I'm also interested in the fpr & how to test it w/o a fuel pressure gauge. One question; why is there a ~2" hose connecting the pass exhaust manifold into the intake box, when do you want hot air in an engine?? What controls that? I want to disconnect it. I've also got some other ideas like fan clutch & some others. The mileage shows 80k, it seems like its 180 or 280 though but I think whatever problem they had before got a lot worse w/ the wrong plugs in it for the last 6 months. Thanks for all your help I've already found searching through this forum.
