Jeep

Asked by GuruR4PMY Jan 31, 2020 at 07:34 PM about the 1999 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

Ok so I got a Jeep and it needed a motor so I
bought a motor the Motor ran when I pulled it when
I put it in this one it runs but jumps around like
crazy when I had that cats hooked up the glowed
red  checked coil and cam sensor and crank
sensor what else is there

3 Answers
41,310

TDolby answered 4 years ago

Glowing cats means unburnt fuel is not burning in the engine and clogging up the cats. I fear you have misfires. Recheck all your electrical connections. Did you replace the engine with the same one you removed? If not, you will need a proper ECM for the new engine.

Mark helpful

GuruR4PMY answered 4 years ago

Pulled the engine out of a 2000 sopost to be the same put a new programmed computer in it checked all connections all seem good

Mark helpful
103,425

KenF answered 4 years ago

Still reads like you have crazy misfires. Did you remove the cap/rotor during engine pull or install? Got plug wires in right order?

Mark helpful

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