Catalytic Dead?
#1
Member
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Thread Starter
Catalytic Dead?
This is probably a no brainer. But since its -20 outside, I'll take advice over troubleshooting. Today my '93 88 ran all good a couple times. Then I got in to go again, ran rough. got worse as I drove sputtering, backfiring, no power. Oh the way home, I noticed sparks (yes sparks) coming out of the tailpipe. So my conclusion would be the c.c. had a fatal meltdown. Thoughts?
#2
Retired
Could be. Remove the O2 sensor and see if it drives better.
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
#4
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Thread Starter
Unfortunately, no. I live in the sticks and I am going to have to call and even see who does exhaust. Although I can disco the 02 sensor, I cannot see that causing sparks to blow out the tailpipe. Agreed?
#9
Senior Member
By runs like crap, you mean no power?
Did you try to road test the vehicle with the exhaust disconnected, to eliminate a back flow problem?
If you did, and it runs like crap, then back to basics.....if driven with a misfire, that misfire could have taken out the cat.....
Check that f/p reg hose for fuel....try driving with the MAF disconnected......check fuel pressure, and spark on all cylinders with a spark tester......
Scanned for codes?
losing coolant?
Did you try to road test the vehicle with the exhaust disconnected, to eliminate a back flow problem?
If you did, and it runs like crap, then back to basics.....if driven with a misfire, that misfire could have taken out the cat.....
Check that f/p reg hose for fuel....try driving with the MAF disconnected......check fuel pressure, and spark on all cylinders with a spark tester......
Scanned for codes?
losing coolant?
#10
Member
Posts like a V-Tak
Thread Starter
The car would not scan at all. So I am going to do spark test tomorrow, just picked up the tool. MAF is new, so I don't think that'* the issue. Hoping its a coil pack. Fingers crossed