VACUME PROBLEM I THINK?

Tiny
KORNDSOILGRODOPE
  • MEMBER
  • FORD RANGER
I HAVE 98 FORD RANGER 4X4 4.O MANUAL. FOR SOME REASON WHEN I HAVE THE HEATER ON AND IN PANEL/ FLOOR OPERATION IT WILL WORK CORRECTLY TIL I REACH A SERTAIN RPM THEN THE HEATER WILL SWITCH OVER TO DEFROST OPERATION UNTIL THE MOTOR REACHES A LOW RPM AGAIN. ALSO HAVE NOTICED THAT SOMETIMES IN 4X4 THE HUBS EITHER SLIP OR DONT LOCK IN. THE HUBS ARE RAN OFF THE VACUM AND I ALSO THINK THAT THE HEATER PROB HAS SOMETHING TO DO WITH THE VACUM BECAUSE I WAS MESSING AROUND WITH THE VAC LINES THAT GO TOWARDS HEATER AND HAD A FRIEND INSIDE TELLING ME WHAT WAS HAPPENING AND WITH TRUCK RUNNING AT AN IDLE THE HEATER WORKED PROBERLY BUT WHEN I DISCONNECTED A SERTAIN VAC LINE THE HEATER WOULD SWITCH TO DEFROST SO I THINK SOMEWHERE ALONG THE LINE OR ANY LINE THEIR MIGHT BE A PROBLEM WITH THE VACUM SYSTEM MAYBE NOT ENOUGH VACUME TO HEATER IN HIGHER RPMS OR MAYBE A LEAK IN THE SYSTEM SOMEWHERE AND IF SO COULD THIS BE A CAUSE OFF THE HUBS SLIPPING OR NOT LOCKING, ALSO TOOK THE VACUME LINE FROM THE HUBS ON THE TOP OF MOTOR AND DISCONNECTED IT WITH ENGINE RUNNING AND IT SEEMED TO HAVE GOOD SUCTION AND I COULDNT SEE A PROB BUT STILL COULD BE A BREAK IN THE LINE SOMEWHERE CLOSER TO HUBS BUT POINT IS THEIR IS VACUME TO IT SO ANY HELP WOULD BE APPRECIATED IM NOT TO FAMILIAR WITH TRUCK (JUST GOT IT) thanks
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Wednesday, November 28th, 2007 AT 4:41 PM

4 Replies

Tiny
MERLIN2021
  • EXPERT
If you look around under the hood, you will find a plastic ball with a single vacuum line going into it. Check the ball for vacuum leaks, this is the reserve, it's there for that very reason. As RPM goes up vacuum goes down, so the reserve keeps things working!
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Wednesday, November 28th, 2007 AT 4:58 PM
Tiny
KORNDSOILGRODOPE
  • MEMBER
A single line into a ball? like exactly where is this, more info could help, i did find a kinda like regulator looking thing that had 2 lines going off of it and the top was like a bottle cap that turned but didnt seem like it did anything,Didnt tighten up or loosen any and this was mounted on the top driver side of motor right on the side of the motor but other than that idk


http://www.2carpros.com/forum/automotive_pictures/119994_vacuum_1.jpg


but this is what im talking about and from looking up vacuum reserve in an autozone part thing on autozone.com thats what came up and it claims it as vacuum selinoid so im not sure if this is it but if so how would i chek it for leak
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Wednesday, November 28th, 2007 AT 10:08 PM
Tiny
MERLIN2021
  • EXPERT
No thats the EVR, or EGR solinoid, If you cant find it get a can of gumout and spray the lines and when the idle changes, you found your leak. It's either that or the control for the heater leaks vac.
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Thursday, November 29th, 2007 AT 2:38 AM
Tiny
KORNDSOILGRODOPE
  • MEMBER
OK SO I WAS LOOKING AROUND ON IT AND I DECIDED TO TAKE OFF THE PASSENGER SIDE TIRE AND PUT IT IN 4X4 AND SEE IF THE HUBS WERE EVEN LOCKING BUT THEY WERENT AND I TRACED VAC HOSES TO HUBS AND RIGHT AT HUB WHERE HOSE CONNECTS I FOUND THAT THE HOSE HAD BROKE IN HALF AND WAS HANGING BY A THREAD SO I FIXED THE BREAK AND NOW 4X4 WORKS GREAT HUBS ARE LOCKING IN AND SO FAR HEATER IS WORKING PROPERLY, BUT BEFORE I FIXED IT I CHECKED VAC AND THEIR WAS NO VACUUM SO I WENT AND REMOVED IT FROM 4X4 AND THEN PUT IT BACK IN 4X4 AND CHEKD IT AGAIN AND IT HAD VAC THEN AFTER ABOUT A MIN IT STOPPED SO I AM GUESSING THAT IT PRESSURES UP AND THEN HOLDS THE PRESSURE TILL YOU TAKE IT OUT OF 4X4 THEN IT RELEASES PRESSURE AND DISENGAGES HUBS, SO BEFORE WITH BREAK IN LINE I COULD PUT IT IN 4X4 AND THE DRIVER SIDE TIRE ( THE GOOD ONE) WOULD SPIN WITH POWER TIL BOUT A MIN AFTER SO IM GUESSING WITH THE BROKEN HOSE IT PRESSURED UP AND LOCKED THE GOOD HUB WHILE THE OTHER WAS LEAKING UNTIL ALL THE PRESSURE WAS RELEASED AND THEN THE HUBS DISENGAGED, AM I RIGHT OR EVEN CLOSE
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Thursday, November 29th, 2007 AT 4:41 PM

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