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92 cherokee sport 4.0. Power loss, idles ok, but barely can move under power

Fuel filter, pump replaced. Dist cap and wires replaced. MAP replaced, Throttle position sensor replaced. No cat present. EOM replaced, worse. Supposedly pre programed. Engine light on and Amp needle buried far right with new EOM.

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  • Cars & Trucks Master
  • 5,870 Answers

Any problem before, plugs, wires, coils???Any codes? This could create a problem.

Posted on Jan 13, 2019


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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SOURCE: 2000 td 2.5 Jeep Cherokee sport

Seems like you might have wet the no 1 injector sensor..(little black plastic thing with 2 wires) It sends a pulse back to ecu and if wet it,s no good....

Posted on Nov 08, 2008

  • 362 Answers

SOURCE: 1996 chevy c1500 w/rotten egg smell,loss of power,rough idle

Your catalytic converter is plugged up,  If you check the exhaust output at the tailpipe you will find it restricted.
Let me know if I  can assist further.

Btw, I’m available to help over the phone in case u need at

Posted on May 08, 2009

  • 6982 Answers

SOURCE: 2000 jeep cherokee sport fuse diagram

Likely you are looking for a 30 amp circuit breaker...(Looks like a small rectangular metal fuse) But...if the power door locks work, i don't think that it's bad (serves locks & windows) My diagrams show a bunch of diodes and resistors inside the master (drivers) door switch, but I've had a few apart and never saw any. (embedded?) Personally I don't see anything that shows me reliability built into the switch...It's a really "iffy" design (one in my niece's Jeep only works when the sun shines on the drivers door) There is also a control module associated with the windows but I've never needed to replace one and the manuals never tell you where they are!
Check power at the switch and check harness where it goes through the rubber boot between the door and body. at least 80% of problems I've seen are either the switch or that wiring. Wires can be spliced and you can get a decent used switch at most scrap yards.
Good luck...glad they aren't stuck down!!!

Posted on Jun 27, 2009

  • 672 Answers

SOURCE: I am experiencing power loss

these vehicles are known for ignition coil failure. typical symptoms include: Misfire, power loss, vibrating engine, poor fuel consumption. If the vehicle's engine vibrates, it be misfiring. Is your chk engine light on???

Posted on Sep 29, 2010

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SOURCE: I have a 1994 Jeep Cherokee, V6. It idles rough

Thanks for choosing FixYa and welcome to the site. To be honest with you, there are many things that can cause a rough idle and power loss. I will tell you everything you need to check. Check to see if you have any vacuum leaks. Make sure your air filter and fuel filter are not clogged. If you haven't had a tune up in a long time, you need to have it done. Change your spark plugs.coils, wires, distributor cap, coil packs. Change your fluids if possible as well. You want to make sure to check your pcv valve also. Inspect all wires and hoses to make sure they are not damaged. And lastly, make sure the battery is good and holding a proper charge. Make sure the terminals are cleaned. If your parts are not getting the proper voltage, your vehicle will not perform like it should. If you have any questions, feel free to ask and thanks for using FixYa.

Posted on Apr 14, 2011

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Dec 25, 2015 | Ford Cars & Trucks

1 Answer

1996 Jeep Grand Cherokee 4.0 auto idles good but will only move with it wide open or just barely any throttle

what transmission, mines a 5 speed stick so?????
idles good, well that dont take much.
will only move, car moves?
with what wide open ,the throttle?
well just barely throttle is normal, why say that?

my guess is car has low power, or can not go fast in all gears.
is that it?
if yes, that is transmission slip or a weak engine,
transmission slip is easy RPM goes way high car dont move
weak engine acts like brakes stuck on , low RPM deep right foot.
post all symptoms and win, big time.

Feb 22, 2015 | 1996 Jeep Grand Cherokee

1 Answer

My 1992 jeep cherokee sport inline6-4.0L idles rough and stalls when warm...

ever tune it up? ever , or at the 60k mile points?
if not why not.
does the CEL lamp glow running>?
rough idle is called misfire.
stalling can be many things, a mech sees this all in 5min.
here on the form i have to ask many questions (cant drive it)
lets play that out.
1: i start car and ask owner, ever tune it up,: blank stare.
2: i see it dont reach 180F coolant temp,. (bad thermostat)_
3: then note misfire. i tune it up and its fixed. or
4: it still misfires,, i find the EGR stuck open. (listed under service 60k)
5: it still misfires, i find idle too low, the ISC is stuck closed.
i clean the EGR and ISC valve and car now idles ok,
but is still rich , i find the 02 front sensor long gone bad.
it looks like it has cancer.
there are over 50 causes for misfire,
1 or all 6 cylinders. what we do is start with basics and work up.

here are 2 hints on stall.
first off the ECU failed to stop the stall, its programmed to do that
using the ISC .
so it failed to work.
the EGR stuck open will do that every time or idle at 500RPM
and shake the engine hard, misfiring.
or if one cylinder or more is dead.
or if the ISC sticks closed.

so when it seems to stall, pre-stall, as RPM drops below 800 rpm
you use a fast right foot. is it easy to prevent the stall?
easy,save, is isc stuck closed? gummed up.
harder is EGR stuck open, (but you can correct it by hard actions of right foot)?
impossible to stop the stall.?

your mech, does all that action in 5min. flat.
even loss of 12vdc power to EFI systems , do this.
(cant save it) and mech sees dash lights go dead. bingo no DC power, all by looking and seeing. and feeling.

he gathers evidence,

both my 4.0L jeeps, loved to stick the ISC.
every 20kmiles, off it cam and got sprayed with
Klondike gun lube, Dry lube. no oil , it looks like brown paint
and acts like Teflon.
The 4 liter likes to get he PCV oil mist up to the ISC,
this builds a film of gunk on the valve cone inside .
im not saying this is it, but the easy save above is a big clue.

Oct 02, 2013 | 1992 Jeep Cherokee Sport

1 Answer

92 accord engine/rpm/lack of power problem

i had the same prob on a toyota check out the fuel presure if its good its prob the fuel regulater i think it should have around 32 psi but call and double check that

Feb 27, 2012 | 1992 Honda Accord

1 Answer

4.0 HO 6cyl 96 Cherokee Classic--loud, arrhythmic, knocking in park, under power sounds fine, also, a single knock occurs when I decelerate and go from park to drive, then fine under power. Pulled engine...

Oh Oh, better take that to a garage. When under power there is no knock but idling there is a knock? Sounds like a bearing on the crankshaft. To find out start and let it idle then disconnect and then reconnect the sparkplug wires one at a time. If the knocking stops, that cylinder is bad In any event it is bad news, rebuild or new engine
Sorry, Merry Christmas

Dec 20, 2017 | 1996 Jeep Cherokee Sport

1 Answer

92 Jeep Cherokee Laredo 4.0 6cyl. (193,000 mls) Loss of power.

Try some "heet" , STP gas treatment or the like. sounds like you might have some bad gas.

Mar 13, 2017 | 1992 Jeep Cherokee Sport

1 Answer

Idles and starts fine, press in the clutch and motor dies? 92 Jeep Cherokee 2 WD

sounds like a bad switch to me loo under dash for switch on cluch it is likely a fault in the anti theft system or the remote starter

Jan 16, 2010 | 1992 Jeep Cherokee Sport

2 Answers

Where is the fuel pump reley located on my 92 jeep

under the bonnet in a black plastic box ,but which one is the fuel relay?? more like a new pump is needed because they go before the relay .unless its a made in china relay .

Dec 12, 2009 | 1992 Jeep Cherokee Sport

1 Answer

1997 Jeep Cherokee Sport 4 liter 4 wd with intermittent loss of power frequelently to point where no power at all causing to pull off to side of road. Have replaced both 02 sensors with new Bosch units,...

Has the fuel filters been done?There is an often overlooked filter on the left side chassis frame,near the fuel tank.It may be under pressure so be careful if checking it.Hope this helps

Sep 22, 2009 | Jeep Cherokee Cars & Trucks

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