Question about 1999 Jeep Grand Cherokee

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87 Cherokee 2dr, Man Trans, 4.0L 170K miles but JUST CHANGED OUT THE ENGINE myself with one that has only 30K miles on it! Idle's great but slow on revving and TERRIBLE/SLOW ON ACCELERATION! note: new - plugs, plug wires, cap, rotor, air filter, oil filter, oil pressure sensor. Old engine had a terribly loud knocking noise in the rear of the engine but still ran great. Didn't sound good. Any thoughts?

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  • Philip Frye
    Philip Frye Nov 19, 2009

    Remarks:
    Flywheel is fine and working well with new 'used' engine that I installed with a new clutch and clutch slave cylinder.
    New parts installed: Fuel Filter, Spark plugs, spark wires, cap, rotor, oil filter, air filter. Distributor really only has one way to go in and bolt's down to the engine.
    Again - engine idles great and is very quiet. Just seems to respond very slow when revving the engine when sitting still and then it chugging when trying to accelerate in order to get up to speed to engage into the next gear.

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The loud knock is the real worry here, did you make sure the flywheel wasn't cracked? if that is ok you have a engine bearing problem and the engine will fail very soon, a few questions, has the fuel filter been changed and the fuel pressure checked? this sounds like either low fuel pressure restricted exhaust or an ignition timing probem, check these things, do u have a repair manual?.

Posted on Nov 19, 2009

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ok, this can be real easy.
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that is because the clutch has a stall speed.
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My Jeep keeping shutting off, but if I pout it into gear it will stay running


2000 WJ jeep , USA
when STALLS only driving , any time , or just as I come to stop it stalls. or stalls parked only. my guess parked only.
which engine is there?
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  1. besides stalling, does engine and trans work great , driving, like fast /slow, , hot/cold engine, , up hills too, fast?
  2. is the CEL lamp in dash on key on and off running.?
  3. did you check all fuses.
  4. what is miles on engine.
  5. when did it run perfect last, 1 week ago, 1year, 10 years?
  6. ever get and engine tune up this decade? spark parts and filters?
  7. is the ASD relay dropping out just before the stall>?
  8. is engine rpm below 800 RPM before the stall? hot engine.
  9. does engine reach and old full engine temp, 180F or more?
  10. use a scan tool and see all DTC errors yet, dont skip this.


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