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Unread 06-27-2008, 05:36 PM   #1
GrandJC78
Registered User
1996 ZJ 
 
Join Date: Nov 2007
Location: Illinois
Posts: 135
my jeep is slow!

1996 Jeep Grand Cherokee I6 4.0l

just replaced the crankshaft position sensor because it wouldnt even start. we hooked up a powertech programmer and the code p0320 Ignition/distributor engine speed input circuit. does anybody know what this means? i read that it might have something to do with the crankshaft position sensor. check engine light is not on. im running 31 by 10.50 15 tires and am thinking this may be part of the reason. would any of the sensors prevent it from being fast. when i put the pedal to the floor it redlines at like 3700 rather than 5800 and is just overall slow. anyone have any opinions/suggestions? thanks. also has k and n intake and new plugs and wires.

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Unread 06-27-2008, 07:14 PM   #2
zacjeff
Registered User
1997 ZJ 
 
Join Date: May 2008
Location: southeast MO
Posts: 116
i didnt put on a BB and bigger tires so my jeep would be fast
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4.0 I6, 30" by 9.5" dueller at's, crager soft 8's, 2" BB, home made quick discos, K&N cold air intake, ford taurus e-fan

"I say if your kid knows peanuts will kill him and he insists on stealing someone's p-butter sandwich, that's just darwin in action."
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Unread 06-27-2008, 07:17 PM   #3
zaq123
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1941 JK Wrangler 
 
Join Date: Jul 2004
Location: here
Posts: 3,999
sell it and get V8
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Unread 06-27-2008, 07:17 PM   #4
lakailimited06
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1999 WJ 
 
Join Date: Sep 2007
Location: Long Island, NY
Posts: 2,025
ive got 31x10.5 Mts on steelies and my 4.0 is alot slower than it was stock...
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99WJ 4.0
IRO 3", SYE, D30 aussie/8.8 aussie, 4.10s, 33's, skids/bumpers
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