vacuum diagrams?

2002 DODGE RAM
4.7L • V8 • 2WD • AUTOMATIC
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2DUMDUM
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I just rebuild this motor. Starts up but does not stay on/does not idle. I can keep on if I apply some gas but it sounds like either a vacuum issue or miss fire. Sounds a little rough. I'm having issues finding the vacuum diagram for this motor to make sure I plugged it all back in correctly.
Aug 23, 2014 at 1:29 PM
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HMAC300
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Here is the engine vacuum line diagrams. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
Aug 23, 2014 at 1:39 PM
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FVRACERONE1
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Brakes problem V8 Two Wheel Drive Automatic 115000 miles I have what appears to be a vacuum line hanging from the brake line tee fitting on the rear axle. This ia 2wd vehicle with rear ABS. Where does the free end go?


https://www.2carpros.com/forum/automotive_pictures/525918_fl_2010_1.jpg

Mar 14, 2019 at 6:57 PM (Merged)
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STRAILER
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That is not a vacuum line it is the vent for the differential. It looks like it fell from it mount. Reattach it and use a sip tie to hold it in positions if needed.

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
Mar 14, 2019 at 6:57 PM (Merged)
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CHEFSHACK
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the vacume line was loose a few months ago and it was repaired at my local shop. they are not open today and I would like to know the location of this hose so I might try to attach it myself
Mar 14, 2019 at 6:57 PM (Merged)
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HMAC300
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what engine? id dont think there is a vacuum line going to trans. what is the specific problem and is your service engine light on?
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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Ok I have a 1994 Dodge Shadow with a 2.5L Its has 98,000 miles on it.

So heres the story and problem.

I just recently purchased the car. And soon after my head gasket blew out. When i took the top half apart i realized i had to replace every gasket on the top and all the hoses because they were dried out majorly. So after cleaning up and replacing everything I found my vacuum hose diagram didnt show where one of the hoses on the throttle body goes to.

But anyways i dont have 1 hose hooked up (it was already broken off before i started) cant find where it goes. And the only way im hearing on how to put this car back in time is by lining a 0 up in the hole in the bell housing. Ive tried everything i can yet i cant get my car to even fire up. all she does is crank n crank.

What am i doing wrong? what are the possibilties. I badly need help on this.
Mar 14, 2019 at 6:57 PM (Merged)
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SERVICE WRITER
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post a pic of the hose and where the hose is coming from to start with.
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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ok i dont have a pic of as now but i can describe it and trry getting a pic later.

the throttle body has 3 hoses in ther front the middle one is down lower than the other 2. it is the one missing.
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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Ill have some pics up tomorrow. Can you or anyone else send me a vacuum hose diagram? i got the one on the hood of my car but its not showing all the hoses
Mar 14, 2019 at 6:57 PM (Merged)
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SERVICE WRITER
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With FLex fuel:


https://www.2carpros.com/forum/automotive_pictures/30961_shadflex_1.jpg

W/O flex fuel:


https://www.2carpros.com/forum/automotive_pictures/30961_shadreg_1.jpg

Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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https://www.2carpros.com/forum/automotive_pictures/73271_right_here_1.jpg

where the red line comes out of the throttle body is the hose i cant find. Its about a half inch to an inch below the 2 beside it
Mar 14, 2019 at 6:57 PM (Merged)
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SERVICE WRITER
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compare the drawing to your system and mark off each one that is listed and you have on the car. I would expect there will be one component left over not getting it's hose.
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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Ill try that again tomorrow i gotta work all day today.

I was tinkering with the timing again last night and it sounds closer but i dont think i can get it anymore lined up than i did. I had the #1 piston top dead center the bell housing mark was lined up and the distributer was lined up plus i had the crank hole top dead center. She sounded like she was huffing and puffing some but she still aint firing up.
Mar 14, 2019 at 6:57 PM (Merged)
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DWHITE
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If you had the timing chain ,or belt, off did you line up the marks on the cam gear with the crankshaft gear? Or you might still be off with the distributer. Are you sure the #1 piston was up on compression stroke and not up on exhaust stroke?
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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Im not 100% sure but after reworking some of my vacuum hoses today and spraying in some ether i did shoot a flame out the throttle body.

That would mean i had it on compression not exhaust wouldnt it?

she started firing a little but still wont run and wont always fire. Any more ideas? because this is dryin me up
Mar 14, 2019 at 6:57 PM (Merged)
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SERVICE WRITER
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https://www.2carpros.com/forum/automotive_pictures/30961_timmrk_1.jpg

Is this what you have-as mentioned by DWhite? Double check plug wire routing, also
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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Ok thanks for the advice i finally got her running. she has another problem though. When im going up a hill no matter how small it is she loses power and i have to shift from drive to second and sometimes first. i can put the pedal to the floor and she still loses alot of speed. and shes slow on take off. any ideas??


btw it wasnt the wires i just had to retime everything all over again abnd rerun a few vacuum lines and adjust a few things here n there.
Mar 14, 2019 at 6:57 PM (Merged)
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SERVICE WRITER
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your welcome
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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anyone have any ideas on my last question?
Mar 14, 2019 at 6:57 PM (Merged)
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DEMONBOY279
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could it possibly be from a clogged cat? because mine seems a little clogged it dont hold back full force but she is glowing
Mar 14, 2019 at 6:57 PM (Merged)
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SERVICE WRITER
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It shouldn't be glowing. You can disconnect the exhaust and run it to see what kind of difference it makes, but sounds like you need to see if it is restricted or too much fuel is getting dumped into it.
Mar 14, 2019 at 6:58 PM (Merged)
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DEMONBOY279
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Ok i just realized i dont have a pcv valve. I dont know how thgat happened but its gone. And i read... Rough Engine Idle: A PCV valve that does not close properly will directly affect the air/fuel mixture supplied by the carburetor. This can result in a rough idle and hesitation.



So if one is completely missing it would do the same correct?

she idles really rough and hesitates alot as ive stated already. and if shes burning rich that would cause the exhaust manifold and cat to over heat right?
Mar 14, 2019 at 6:58 PM (Merged)
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SERVICE WRITER
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Sure , a large vacuum leak will change the air/ fuel mix and cause drivabilty problems that is monitored with inputs to the computer.
Mar 14, 2019 at 6:58 PM (Merged)
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DEMONBOY279
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WHat else should i be looking into that could make it burn rich?

Shouldnt it be throwing a CEL?
Mar 14, 2019 at 6:58 PM (Merged)
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JPROUTY
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i put a 360 from a 96 ram in my 95 ram and some vac lines are differnt and the hayns book tells noyhing on vac lines could you point me to a diogram of the vac lines thanks jason
Mar 14, 2019 at 6:58 PM (Merged)
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BLUELIGHTNIN6
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To ensure I post both correct vacuum diagrams could you please list the specific liter size for each engine? i.e. 5.2L , 5.9L etc.





Thanks for using 2CarPros.com!
Mar 14, 2019 at 6:58 PM (Merged)
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MELLIOTT12188
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i have a 2500 4x4 and the two vacuum hoses running from the top of the transfer case rotted off and i can find out where they go because the book on this truck doesnt give you a vacuum hose diagram from the transfer case to the top of the motor can you help with this one?
Mar 14, 2019 at 6:58 PM (Merged)
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JACOBANDNICKOLAS
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Hi:

They shuld ultimately run to the intake manifold. Check on the passanger side back side of the engine. That normally is the direction they run.

Let me know what you find. Also, I'll check to see if I can find a vacuum schmatic.

Let me know.
Joe
Mar 14, 2019 at 6:58 PM (Merged)
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JACOBANDNICKOLAS
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After I sent that, I was thinking. I believe one runs to the engine as I said, and one to a vacuum canister. Check that out too. Also note, they run to the front axle.
Mar 14, 2019 at 6:58 PM (Merged)
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MBAZE559
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1996 Dodge Ram V8 Four Wheel Drive Automatic

Ok I'm looking for the name of the plug that's on the top of my transfer case. It's a 96 dodge ram 1500. It on the top and has 4 like vacuum lines that go to it. One of the pieces broke on It and I can't find out the name of it. If they are vacuum lines could this cause my tranny to shift funny?
Mar 14, 2019 at 6:58 PM (Merged)
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JACOBANDNICKOLAS
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Believe it or not, it's called a vacuum switch. Here is a picture of it to confirm what I am saying.


https://www.2carpros.com/forum/automotive_pictures/249084_5_48.jpg

As far as the 4wd, it will have an affect on it; however, it won't cause the transmission to shift funny. Can you explaine what is happening? Joe
Mar 14, 2019 at 6:58 PM (Merged)
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MBAZE559
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Well first my low beams quit working. I can click the high beam but the won't stay on, I have to hold the switch to keep them on. I replaced the switch and still does it. Now the main problem was about 2-3weeks after that my tranny tweaked. It would hold out first and second then when it shifted into 3rd it would down shift back to second then shift back into 3rd. So I go get the tranny rebuild and get it all back together and the 2nd day back on the road I hit the kickdown and it goes back to tweaked mode haha. I don't know wut the heck Is going on. Bit when I put the tranny back in I noticed that vacuum plug had a piece broke off. I can care less about the 4x4, I'd rather have my truck shifting right. Everything in the tranny was replaced. You think it could be electrical? Or something?It has a warrenty on it so I'll prolly jus take it back
Mar 14, 2019 at 6:58 PM (Merged)
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JACOBANDNICKOLAS
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I would say electrical. Most likely a bad TCM.
Mar 14, 2019 at 6:58 PM (Merged)
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ROCKMEAL
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My name is Bob and I have a 1994 Dodge Ram 1500 4x4 5.2L Pickup. I noticed a slight chirping noise. The truck ran fine good get up and go. I tuned it up because it was time. I changed the plugs, cap and rotor. After which I had gradual pick up but not able to punch it and go. It bogs and when I let up on the gas pedal it starts to pick up again. Mean while I get this slow chirping to fast and back to slow as I slow down. Only while I am driving can't hear it in park or Idle. I checked the cap, rotor and vacuum lines. The noise sounds like it coming from the firewall area. Hell pa hell pa.

Mar 14, 2019 at 6:58 PM (Merged)
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ROCKMEAL
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The problem is with the acceleration the noise part of the problem.
Mar 14, 2019 at 6:58 PM (Merged)
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ASEMASTER6371
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i would look at the vacuum lines. you may have knocked one off performing your services.

Roy
Mar 14, 2019 at 6:58 PM (Merged)
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KRZYKATZ
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Engine Mechanical problem
1994 Dodge Ram V8 Four Wheel Drive Manual

i have a 5 speed and when approaching hills i accelerate to floor and it will not speed up till you reach top of hill. i have unhooked and plugged all vacuum lines except one line that operates evap purge vavle and egr vavle. i can not find the problem.
Mar 14, 2019 at 6:58 PM (Merged)
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RASMATAZ
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Possibilities: Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it.
Mar 14, 2019 at 6:58 PM (Merged)
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MELLIOTT12188
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i need to know where the two vacuum hoses running from the top of the transfer case attach to on the top of the motor because they rotted of before i bought this truck last week and i cant find out where they attach so my four wheel drive will engage properly?
Mar 14, 2019 at 6:59 PM (Merged)
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BMRFIXIT
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https://www.2carpros.com/forum/automotive_pictures/99387_Graphic1_530.jpg


https://www.2carpros.com/forum/automotive_pictures/99387_Graphic2_260.jpg


https://www.2carpros.com/forum/automotive_pictures/99387_Graphic3_116.jpg

Mar 14, 2019 at 6:59 PM (Merged)