Engine misfire Just had engine on my XJ sport 3.2i steam cleaned and now have a misfire, will it clear itself.

It is in the engine bay next to the radiator cap. There are very few reasons where you ever need to go near it.

Where is the ECM located on a 2001 Jeep Cherokee Sport

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Feb 4, 2018 · 16 posts · 3 authors
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here - Where is the ECM located on a 2001 Jeep Cherokee Sport ?
where is my pcm located? HELP! please
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if you follow the fuel rail gas line, it goes to the filter.
for sure.
4.0L 97 , we have the FSM to see all that , ive posted it 100s of times here. that link.
please explain the bog more clearly.
cold or hot engine or both.?
is it just tip-in throttle bogging , only then POWER catches, up?
while bogging can you go to WOT and see if it has full power now?
ever get a full 60k mile tune up with new spark parts. and filters.
is engine misfiring.
is engine idle too low rpm or too high with a hot engine?
is fuel old.
did car sit for long time ? unused?

"not getting gas" can be 2 things, bogging or misfiring
they are night and day different, one is like pulling a dead weight
the misfire is violent engine shaking,
see?
and 2 different diagnostic paths due to that ...

if wot is ok, then that implies fuel pressure is good. and filter.
see?

WOT = WIDE OPEN THROTTLE.
i drove a 99 XJ for 300k miles. and know it well..

free fsm
click fuel system here 96-2001 xj
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

see that page? page 14 in PDF
if you changed the pump, you had it in your hand.
unknowing
its on top of the fuel tank pump RACK.

if engine is tuned up,?
and power is low at wot,
i check fuel pressure live.(under varying engine loads)
if the pressure is out of spec, i get a new filter and PPR.
if pressures are in spec. dynamically.
i find out why the PCM is under-injecting.
ask how. its not hard.
(bad MAP?, , injector balance tests?)

Check the spark plug for Cylinder #3. Check the boot and wire around that plug and back to the distributor/coil. Likely have water (from washing your engine) arcing and shorting that cylinder & causing misfire. Wait for a long time for everything to dry, should clear itself. Also, hope you used MAF sensor cleaner to clean the MAF sensor. If you used something else, you might have ruined the sensor - it is very delicate.

If ECU has crank signal and engine turns over, ECU should give injectors a pulse and trigger the ignition. If not ECU might be bad. You should check power and grounds going to ECU. There are usually multiple power and grounds going into ECU

If you need further help, reach me via phone at https://www.6ya.com/expert/david_f2436a37cbb50365

is running rich. that cutting out is called misfire.
in this case, rich caused misfiring.
Does the CEL lamp come on? Check engine lamp.
misfire is complex. (caused my many a thing and needs careful
diagnosis by a technician)

What codes do you have?

Get the codes,look them up &
have a repair start over & resolve,
unless you can handle the fix

It is either in fail safe for overheating,ignition misfires
or trans problems

Dirty fuel injectors. Computer will show misfire on the cylinders that are malfunctioning. If injector cleaner in tank won't clean them, pull them all out and have a professional take them apart and cleaned. Each injector has a screen in it that can get plugged up. Think about Bro, all other stuff has been renewed.

YES,you steam cleaned the engine,it may right itself after drying out(hopefully)when you steam clean, the water particles are much smaller than a normal "hose down"so you may have wet the electronics.if it starts, then let it run for awhile to (hopefully)dry out itself.

unhook the battery for ten minutes and hook it back up... that will clear the code... if your stereo requires a code make sure you know it first.

Robert

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have you tried a new coolant sensor?it is poss it is telling the ecu its still cold so its chucking more fuel through. also get a block tester and test cylinder head