Senior Member
Issue started yesterday afternoon Ac went from blowing thru the vents to the defrost shortly after hearing what sounded like..... (a good example would be a napkin being suck into a shop vac). Later that night my blend door failed and was blowing heat from the defrost/floor. Here is what I've done so far
1. Replaced blend door actuator
2.Repaired EATC o rings
3. No leaks as far as I can tell.
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'Just Live'
Sick-Speed play toy
Check for vacuum leak from the EATC to the vacuum manifold behind the intake.
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SOLD 12/31/2021
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Senior Member
Originally Posted by justbob
The vacuum reservoir (black box)? Or the small tree like piece with the check valve? I'm not sure what the vacuum manifold looks like. Btw my intake is on the passenger side. What's the best way to find vacuum leaks?
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'Just Live'
Senior Member
Brake cleaner.
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Turbo Marauder
The thin black vacuum line usually breaks at the firewall.
Senior Member
Go to the boneyard find you an EATC from a newer model and see if its the unit. You can go on LKQ find a u-pick and look at their inventory. The most would be is $30, and if its not the problem return it...
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03 300A
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Senior Member
I removed the EATC vacuum connector ( color lines) to see if the Black vacuum line has vaccum and it does but I'm not sure if it's enough vacuum. I'll trace the line from the firewall once car cools down.
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'Just Live'
Senior Member
I thought it was a bad unit also after issue still existed after changing the o'rings. I tried my repaired unit on my buddy's marauder and everything worked like it should.
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'Just Live'
Senior Member
I replaced the Ac check valve at the firewall, because I've read somewhere I may go bad. I'm convinced it's a vacuum leak somewhere. I removed the line from the vacuum canister ( black box under hood) expecting to hear the air leaking once I pulled the line and I got nothing. My buddy pulled the same line from his car and you can hear the air escape from the box.
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'Just Live'
Senior Member
90* but feels 100* due to humidity right now I'm praying for the rain but weather report says 0% chance of that happening.
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'Just Live'
Everything Marauder, LEDs & HI
Need to do more PD instead of replacing parts.
“When you can’t make them see the light, make them feel the heat.”
Ronald Regan
"The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
Lt. Colonel Ralph Peters
“Be polite, be professional, but have a plan to kill everybody you meet.”
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
General James Mattis
Everything Marauder, LEDs & HI
Check ALL the vacuum lines.
There is a vacuum "tree" mounted to the firewall behind the intake. Start there, tracing each one.
The vacuum tank on the left fender might also have a hole in it.
“When you can’t make them see the light, make them feel the heat.”
Ronald Regan
"The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
Lt. Colonel Ralph Peters
“Be polite, be professional, but have a plan to kill everybody you meet.”
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
General James Mattis
Senior Member
I had to replace the blend door because that went bad blowing hot air only and after doing the EATC test it showed 025. O'rings I found 2 that were dry and broke as soon as I attempted to remove. Check valve probably didn't need to replace but I had one laying around.
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'Just Live'
Senior Member
Yesterday I noticed that when I turned the Ac on by pressing (automatic) it would blow from the defrost but when I slow the fan down it started blowing from the vents once it starts blowing from the vents I can increase the fan but once I get on the gas it went back to the defrost and hasn't changed since
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'Just Live'
Everything Marauder, LEDs & HI
Vacuum leak...... for sure.
“When you can’t make them see the light, make them feel the heat.”
Ronald Regan
"The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
Lt. Colonel Ralph Peters
“Be polite, be professional, but have a plan to kill everybody you meet.”
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
General James Mattis
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