what component operates the egr solenoid


Asked by Dec 11, 2013 at 10:59 PM about the 1992 Mitsubishi Mighty Max Pickup 2 Dr STD Standard Cab SB

Question type: Maintenance & Repair

ive got a 92 mighty max 4cyl 2wd.  i have no vaccuum to egr. when i probe the first wire
on the harness plug it has power, when i ck the second wire it also has power but the
vacuum begins to work once i remove the probe (break ground with test light) i loose
vacuum any ideas.

12 Answers

....well it opens up on deceleration and when combustion temperatures are too hot because the engine would self destruct with the high- temperatures....so we have to find out which components apply vacuum under these circumstances~ it makes it's move like 400 times a second BTW~

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i understand that much of it, just cant figure out why i can ground that second wire rev the engine and get vacuum, but as soon as i disconnect the ground i loose the ability to have vacuum. ive changed the solenoid with same results

1 people found this helpful.

the ECU issues power to the EGR~

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did you disassemble the EGR and spray it clean with some brake cleaner...they get clobbered with exhaust and carbon and do not move even if the diaphragm is intact~

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seeing as they are friggin' expensive, a can of carb cleaner might do it...get a new gasket tho...they ain't much~ https://www.google.com/#q=1992+Mitsubishi+Mighty+Max+Pickup+EGR+val ve

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Don't disconnect the ground...ECU's do not like this~

2 people found this helpful.

besides it's purpose is to "cool the show"....unless you're drivin' it HARD, wouldn't care about this goodie~...upon deceleration...just how much is this saving...like forcing it to breath it's own farts...not too helpful to you, but collectively all of the cars combined leaves a teenytiny carbon nail-print~

1 people found this helpful.

yes did all the basics, just cant figure out the solenoid issue. i need to get it smogged. maybe il just ground the solenoid long enough for smog, would rather fix but just cant figure that part out. hopefully its not the computer

1 people found this helpful.

Yes the solenoid will activate the egr...or kill the egr? you'd have to inspect the operation by applying suction and see what moves...like I say buggered up with carbon have serviced more than one of these in my short career~...in a smog shop nonetheless~

1 people found this helpful.

computers DO NOT FAIL...proper grounding to them DOES fail~ insure the 1/0 black cable has a Clean...down to the metal connection to the chassis ground please...your ecu will not misbehave...the data it's been presented with can be faulty...like a bad temperature sensor for example~

2 people found this helpful.

will check that out also. thanks let ya know tomorrow

a multi-meter would tell you if the coil to activate it is getting power or ignoring the signal~...fact there very well be an egr fuse too~

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