I have a 1992 Jeep Cherokee Laredo (4.0 liter) and I just had the head gasket changed yesterday. Today I changed out the spark plugs and air filter. I know that the catalytic converter is supposed to be working hard right now because of all the carbon that is going through it now. But whenever I come to a red light, the idle goes REALLY low and the car starts shaking. Also, when I go above 45mph, there's a weird knocking noise, but it doesn't come from the engine. It sounds like it's coming from the exhaust. I've already put in fuel injector/ carburator cleaner in it yesterday (it was acting weird yesterday too). Is this supposed to happen? And if so, when will it go back to normal!?
2007-07-04 08:42:57 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Need to get the timing adjusted and the carb adjusted as well
2007-07-04 08:48:23 · answer #1 · answered by Pengy 7 · 0⤊ 1⤋
take it back. If the idle was fine before you took it there it is possible a vacum line is disconnected .Knocking noise is possible from when they reinstalled th y-pipe the didn`t line the exhaust up correcting and it is hitting against something. symptoms of a clogged catalytic converter you would have problems at all range of speeds. Lack of power is a major one
2007-07-04 16:07:39 · answer #2 · answered by miiiikeee 5 · 1⤊ 0⤋
If you replaced the head gasket and smoothed the heads, then you have placed alot more compression for the bottom of you motor. Like the crankcase (crankshaft bearing, etc).
On a 92 you have well over 100,000 miles. It will run wierd for a while if you crankcase can take it. If it smooth out then you maybe good for a few hundred miles before you hear some knocking.
2007-07-04 15:54:47 · answer #3 · answered by shawn s 4 · 0⤊ 1⤋
Well if you changed the head gasket I assume that it was blown before,in which case the blown head gasket may have damaged the o2 sensor and/or clogged up your catalytic converter.
2007-07-04 15:51:35 · answer #4 · answered by ? 5 · 1⤊ 0⤋
No, it's not supposed to happen. Take it back to the shop that did the head gasket. Sounds like the timing is off.
2007-07-04 17:01:09 · answer #5 · answered by Ron B 6 · 0⤊ 1⤋
sounds like the oxygen sensor just went south on yeah.
2007-07-04 16:09:45 · answer #6 · answered by home_grown_outlaw 2 · 0⤊ 0⤋
take it back to the mechanic as it should have no symptoms when you got it back, it should run great right off the bat.
2007-07-04 20:54:29 · answer #7 · answered by mister ss 7 · 0⤊ 0⤋
Something is wrong.
Take it back.
2007-07-04 15:47:26 · answer #8 · answered by "DOZER" 4 · 0⤊ 0⤋