I need some help with a sudden loss of rpms

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06-30-2009, 09:12 AM

#16

kitsapfreerider

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Location: Appleton Wisconsin

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Year: 1997

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by ol"blue

I didn't see where you stated what year your Jeep was? And which engine?

xj 1995 I6 4.0L

haha i guess that would be important

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06-30-2009, 09:18 AM

#17

kitsapfreerider

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Year: 1997

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by BuckB91XJ

Kitsap, The low volts on your gauge would indicate me that your alternator is beginning to fail, easpecially since you are seeing it when driving down the road with the engine and multiple accessories running.

The fact that you can't pull your sparkplug wire boots off the plugs really disturbs me. If you have corrosion that bad at the plugs then you probably have it at the other end of the wires as well...I.E. where the plug wires connect to the dist cap and most likely corrosion on the coil contacts and coil wire or even inside the dist., as well. Corrosion at any of these points I've mentioned can put a tremendous extra load on you electrical system and cause the problems you are having.

The distributor cap looks fine, theres just a little bit of light brown powder on them so I cleaned that side of the wire up. I'm just going to bite the bullet and have the dealer look at it today. I'm also putting new plugs and wires in.

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09-08-2009, 07:02 PM

#18

91blackbox

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Model: Cherokee

could the alt going out cause my prob???

i hit 2500 rpms and loose power and cuts back in.. but just the engine power.. radio lights all that stay on happens all the time.. but only at the 2500-3100 rpm range.. runs fine below or above that range

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09-18-2009, 04:20 AM

#19

ztech1

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Model: Cherokee

97 jeep xj intermittent loss of power

Have 97 Xj 4 liter automatic 4 wd, according to dealer jeep had cracked exhaust manifold and downstream o2 sensor bad. have replaced: Exhaust manifold with edelbrock header, replaced stock air box with k&N cold air intake, BOTH o2 sensors as well as previous plugs, wires, cap and rotor tuneup. Replacing coil, Issue is intermittent and no specific pattern, and may only occur once in a few days. but is frustrating as not able to pinpoint cause to get resolved. All gauges and electrical still operational when loss of power occurs. Have tried numerous brands of fuel system fuel injector cleaner, no real change to correct issue.

Unable to replace fuel flter as some gomer in Detroit felt to put fuel filter in the tank. What a moron he she was.

Any suggestions would be helpful.

Wondering if could be caused by throttle position sensor? Unable to locate via google troubleshooting throttle position sensor as not producing codes for obd 2 to pick up.

Any thoughts or ideas appreciated

Disabled US Navy Vet
Desert Shield Desert Storm OEF OIF