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Jeep Grand Cherokee Maintenance and Repair

4608 messages, Last post on Nov 30, 2009 at 11:06 PM
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Replying to: nj_johnk (Jan 26, 2009 6:42 pm) |
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Hey all. I just bought a 1998 Jeep GC Laredo all time 4wh drive , with 80,000 miles on it from a guy i knew who took exceptional care of it. Very Clean. I buffed and polished it, semi new tires, new breaks, and new filters. Good jeep to own. It runs great, except a few things. I mainly drive it back and forth to school, a modest 10 miles a day, 20 tops.I noticed that the inline 6 is semi weak for it. It drives nice, but i do a decent amount of highway driving at times, and it handles it fine, i just wish it had a little more get up and go. When i press the gas hard it accelerates semi slow, down shifts, and they gets up to speed. Any thoughts on how to improve my engine performance. I have previously thought about a cold air intake, some new plugs and switching to synthetics.. Any thoughts? I also noticed that when i try to put it into 4wheel low, it doesn't like it too much and starts to tremble a little bit.
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Replying to: GC1998v6 (Feb 06, 2009 2:49 pm) Unless your plugs haven't been changed in the last 30K miles, new (and I'm assuming by 'new' you might mean 'performance') plugs won't produce a noticeable change in engine performance beyond a few % improvement in fuel economy. In my opinion, unless you're making a lot of accompanying modifications, a cold air intake alone is a waste of money for this engine. 5-10 hp simply isn't enough to produce a significant change in power. Using a synthetic blend would drop your engine temperature slightly and let you go for longer between oil changes, but I also think this is a waste of money. As for the 4WD L, please provide some more details. Did the previous owner service the transfer case? You might also think to check the TC linkage with the transmission - it can come loose even with normal driving. Good luck |
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I just bought a 99 GC with a 4.0 and it has a bad knock that was coming from the upper end but now since I took the valve cover off and checked the rockers and springs (which seemed good and had correct 20lbs. of torque) the knock seems to come from the lower end. I have no loss of power when accelerating and oil pressure is reading 50 on the guage so I'm assuming it's not the crank. Does anyone have any other ideas before I rip the motor out?
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Replying to: DD99Z (Feb 18, 2009 2:56 pm) some parts houses have a cheep engine stescope that has expanabul rods to listen to the engine while it is running (could be bad piston rod etc ) you should be able to pin it down closer before you pull engine. |
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Replying to: dixiedarvel (May 06, 2008 12:05 pm) |
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| 4.7L GCL Yes it just decides to shut off sometimes when coming to a stop. Then at idle in gear it like idles down to near zero and then jumps back to 700-800 jerking the vehicle. If your not on the ball you could hit rearend somebody. Also have had the complete dash go blank with the engine still running and driving fine. | |
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Replying to: haas95 (Nov 03, 2006 8:03 pm) |
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Replying to: my77gmc (Sep 16, 2008 7:56 pm) |
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