Question about Jeep Cars & Trucks
2005 Jeep Cherokee 3.7 V6 why is it smoking what part of the vacuum system do I need to look evap Oregon vacuumte HVAC or the engine
Posted by Anonymous on
The book is free,
and posted here over 300 times, search much.
all that is covered in the SM. (how to put it back as it was new)
no clues as to what the smoke is.
or where it emits from. (tail pipe end)
white smoke or black
black is rich running.
white can be burning oil and smells like burning oil (lingers)
white can be steam,aka, antifeezes burning, goes the vapors dont linger like oil smoke does and smells sweet, unlike oil smoke.
EVAP is only FUEL vent , fumes. gas fumes.
there are lots of vacuum lines
the engine hood sticker covers the majors, (smog related, )
SM , serv. man. click WK and read.
Posted on Dec 12, 2016
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Posted on Jan 02, 2017
Check the Fuel Pump Relay, it may be malfunctioning and need replaced. Also, in some vechicles, if the batter is disconnected and reconnected, the service engine light will come on from time to time, going off and on simultaneously. Have a diagnostics done to see if any codes show up. If no codes appear, then have them all cleared and drive for another 200 miles. Sometimes the computer will need to be cleared a couple times before the light will stay off. Make sure that all fuses and relays are good, and securey in place. Check all factory installed lights to make sure they are good, and securly in place as well.
Posted on Mar 31, 2009
open hood and ck for broken vacuum hoses going to the purge valve(2 vacuum ports and a wiring connector)
on the drivers side between airbox and firewall
if good remove driver side rear tire and inspect hoses next to the gas tank and 3rd, the canister is in that wheel well also insp for cracked hoses there also, been working for jeep 12 years i charged people about 1 hour to correct this probem.
Posted on Dec 18, 2009
Four things can give you a knocking noise. 1. failed rod bearing 2.failed main bearing 3. Bad piston wristpin 4. broken flex plate (auto trans)
If It's a bearing, likely you are seeing lower than normal oil pressure. Any bearing repair requires the pan to be dropped but to do the job correctly requires engine removal, crank re-grinding or replacement and oiling system cleanout (expensive). Wristpin (piston/rod assembly) can be serviced without engine removal but pan and cylinder head need to be removed. Flex plate is pretty much a trans remove and replace, with new wheel.
Only a good experienced tech can differentiate between the noises so I suggest you seek aid in your diagnosis, though, if either bearing or piston is the problem I'd likely find another engine before considering the repair.
Posted on Jan 26, 2010
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