Where does it go?
Question:
Hello! Love this group! Great information! I have a 1991 XLT, my son brought the vehicle home from school complaining of a hissing noise and rough idle. I opened the hood to find a vacuum leak at a nipple where a fitting tree just above the EGR valve with 4 nipples attaches to the upper engine intake manifold. I can’t for the life of me find any hanging hose, broken hose or dangling hose. I know a vacuum hose going somewhere doing something had to have been placed there. There are six nipples and the hose connection for the vacuum assist booster for the brakes. I capped the nipple to keep the vehicle derivable and went to a Ford dealer parts counter only to draw a blank stare and after several minutes of computer searching, no clue what hose was attached to this lone vacuum nipple. I consulted my Haynes 1991 Ford Explorer Manual to no avail. The vehicle runs fine now, idle is normal, auto shifting is normal. Maybe there was only a cap to begin with? No! Ford would have spent 20 cents needlessly. Any ideas? Thanks again for very informative site and all those who contribute.
Response:
Same thing happened to me. It is just a cap that goes on there. 50 cents at autozone will fix that problem. No need to look for a hose, because you won’t find one. ben
– Hide quoted text — Show quoted text -> Hello! > Love this group! Great information! I have a 1991 XLT, my son brought > the > vehicle home from school complaining of a hissing noise and rough idle. > I opened the hood to find a vacuum leak at a nipple where a fitting tree > just above the EGR valve with 4 nipples attaches to the upper engine > intake manifold. I can’t for the life of me find any hanging hose, > broken hose or dangling hose. I know a vacuum hose going somewhere doing > something had to have been placed there. There are six nipples and the > hose connection for the vacuum assist booster for the brakes. I capped > the nipple to keep the vehicle derivable and went to a Ford dealer > parts counter only to draw a blank stare and after several minutes of > computer searching, no clue what hose was attached to this lone vacuum > nipple. I consulted my Haynes 1991 Ford Explorer Manual to no avail. The > vehicle runs fine now, idle is normal, auto shifting is normal. Maybe > there was only a cap to begin with? No! Ford would have spent 20 cents > needlessly. Any ideas? > Thanks again for very informative site and all those who contribute.
Response:
– Hide quoted text — Show quoted text – >Hello! >Love this group! Great information! I have a 1991 XLT, my son brought >the >vehicle home from school complaining of a hissing noise and rough idle. >I opened the hood to find a vacuum leak at a nipple where a fitting tree >just above the EGR valve with 4 nipples attaches to the upper engine >intake manifold. I can’t for the life of me find any hanging hose, >broken hose or dangling hose. I know a vacuum hose going somewhere doing >something had to have been placed there. There are six nipples and the >hose connection for the vacuum assist booster for the brakes. I capped >the nipple to keep the vehicle derivable and went to a Ford dealer >parts counter only to draw a blank stare and after several minutes of >computer searching, no clue what hose was attached to this lone vacuum >nipple. I consulted my Haynes 1991 Ford Explorer Manual to no avail. The >vehicle runs fine now, idle is normal, auto shifting is normal. Maybe >there was only a cap to begin with? No! Ford would have spent 20 cents >needlessly. Any ideas? >Thanks again for very informative site and all those who contribute.
test port. Replace cap or stuff with golf ‘T’. Happy motoring… LCM
Response:
Same thing happened here. Found a little rubber hose, cut it to about an inches length.. and capped it. There, as far as I know, is not supposed to be a hose going to it. I looked forever and to no avail.. Good luck.. – Hide quoted text — Show quoted text ->Hello! >Love this group! Great information! I have a 1991 XLT, my son brought >the >vehicle home from school complaining of a hissing noise and rough idle. >I opened the hood to find a vacuum leak at a nipple where a fitting tree >just above the EGR valve with 4 nipples attaches to the upper engine >intake manifold. I can’t for the life of me find any hanging hose, >broken hose or dangling hose. I know a vacuum hose going somewhere doing >something had to have been placed there. There are six nipples and the >hose connection for the vacuum assist booster for the brakes. I capped >the nipple to keep the vehicle derivable and went to a Ford dealer >parts counter only to draw a blank stare and after several minutes of >computer searching, no clue what hose was attached to this lone vacuum >nipple. I consulted my Haynes 1991 Ford Explorer Manual to no avail. The >vehicle runs fine now, idle is normal, auto shifting is normal. Maybe >there was only a cap to begin with? No! Ford would have spent 20 cents >needlessly. Any ideas? >Thanks again for very informative site and all those who contribute.
Tristan C. Livingston — ICQ#: 902525 AIM: Ursader — FREE Web Sites & $20 CASH Over & Over http://mysiteinc.com/ursader
Response:
Thanks to: LB, Curious and ursader. I have installed a rubber cap and all is well. – Hide quoted text — Show quoted text – > Hello! > Love this group! Great information! I have a 1991 XLT, my son brought > the > vehicle home from school complaining of a hissing noise and rough idle. > I opened the hood to find a vacuum leak at a nipple where a fitting tree > just above the EGR valve with 4 nipples attaches to the upper engine > intake manifold. I can’t for the life of me find any hanging hose, > broken hose or dangling hose. I know a vacuum hose going somewhere doing > something had to have been placed there. There are six nipples and the > hose connection for the vacuum assist booster for the brakes. I capped > the nipple to keep the vehicle derivable and went to a Ford dealer > parts counter only to draw a blank stare and after several minutes of > computer searching, no clue what hose was attached to this lone vacuum > nipple. I consulted my Haynes 1991 Ford Explorer Manual to no avail. The > vehicle runs fine now, idle is normal, auto shifting is normal. Maybe > there was only a cap to begin with? No! Ford would have spent 20 cents > needlessly. Any ideas? > Thanks again for very informative site and all those who contribute.
Response:
I have two vehicles right now: Military surplus M1008 with a diesel V8. 26MPG under typical driving. VW Jetta TDI diesel. 49+ MPG. When I lived in Germany, I had a Jeep Cherokee with a 2.5L turbo diesel engine. 30+ typical. All three of these engines and vehicles are made here in the US, Canada, or Mexico. Why is it that only the VW is actually available here in the US?
– Hide quoted text — Show quoted text -> Similar experience, but mine is with a 2.5 89 S15. I get between 14 and 17 > no matter where I go, the temperature, or the driving conditions. I can be > going down the road at 55 in the sweet spot of fifth gear, or have it to the > floor going eighty, it doesn’t matter. Before it sat for a year and I toyed > with it, it got 24 in the winter and 25 in the summer on the expressway at > 75-80. > I don’t really know what I did to it, but the gas mileage just plain sucks. > I’ve replaced most everything I can think of that could cause it. I’ve even > tried something as stupid as synthetic oil. And yes, it’s got good vacuum. > I’ve deemed two causes: I put a visor on it and I gave the truck a 3" body > lift (bumpers and all). Before I could only get it to wind out at 85 or so, > and that’s as fast as it’d go without a downhill. Now, I can still get it > to go 80, so how can wind resistance be this big of a contributor? How does > that cause a loss of 10 mpg? I can visualize a loss of 5mpg no problem, but > not ten. > The motor’s seen 176k, but the drivetrain has somewhere around 19?k (after > the original tires it’s never had anything smaller than 235×75’s and it came > with 185×65’s or something) > It’s kind of sad, I’ve got 235×75xr15’s on it right now and it gets better > gas mileage with 31×10.5xr15’s. > -Brian > I know what you are talking about…My last truck was 95 GMC Sonoma High > Rider which is basically an S-10..it was 4×4 extended cab with the 4.3 > litre > HO engine…the mileage on the highway was at best around 14 mpg….the > truck was still a low mileage truck ~30k miles when I traded it in on a > 2000 > GMC Sierra full size extended cab 4×4 which always gets better mileage > than > the old, smaller truck…~16mpg under the same conditions.. > Mike > >Alright, here is my question. I am not a newbie, but I have a question > that > >seems that way. Where does all of my fuel go. I just bought a 96 4dr > 4X4 > >S-10 Blazer, 4.3L TBI w/ 90K. I just went on a road trip and got 11mpg > >highway. I realize they have bad economy, and I accept that, but man. I > >compression checked the engine, and all cylinders where great. It runs > very > >smooth, with no sign that it is running rich on the plugs or exhaust. It > >does not pull to the either side, so the alignment should be good. The > >tires are a 35 pounds and are the correct size. I put replaced the air > >filter, pvc, fuel filter, rotor, cap, wires and plugs before the trip. > >There are no codes. The exhaust seems to flow well, I will do a more > >detailed inspection this weekend. I am going to get a new O2 sensor > >tonight, but that should not have that profound of an effect. My brother > >gets better mileage with his 350 Tahoe, that just does not seem right. > Does > >anyone have anything else I could check, or should I just deal with it. > I > >will be dechoking the engine (replacing air box and exhaust) in a week or > >so. Your thoughts are greatly appreciated.
Response:
Similar experience, but mine is with a 2.5 89 S15. I get between 14 and 17 no matter where I go, the temperature, or the driving conditions. I can be going down the road at 55 in the sweet spot of fifth gear, or have it to the floor going eighty, it doesn’t matter. Before it sat for a year and I toyed with it, it got 24 in the winter and 25 in the summer on the expressway at 75-80. I don’t really know what I did to it, but the gas mileage just plain sucks. I’ve replaced most everything I can think of that could cause it. I’ve even tried something as stupid as synthetic oil. And yes, it’s got good vacuum. I’ve deemed two causes: I put a visor on it and I gave the truck a 3" body lift (bumpers and all). Before I could only get it to wind out at 85 or so, and that’s as fast as it’d go without a downhill. Now, I can still get it to go 80, so how can wind resistance be this big of a contributor? How does that cause a loss of 10 mpg? I can visualize a loss of 5mpg no problem, but not ten. The motor’s seen 176k, but the drivetrain has somewhere around 19?k (after the original tires it’s never had anything smaller than 235×75’s and it came with 185×65’s or something) It’s kind of sad, I’ve got 235×75xr15’s on it right now and it gets better gas mileage with 31×10.5xr15’s. -Brian – Hide quoted text — Show quoted text -> I know what you are talking about…My last truck was 95 GMC Sonoma High > Rider which is basically an S-10..it was 4×4 extended cab with the 4.3 litre > HO engine…the mileage on the highway was at best around 14 mpg….the > truck was still a low mileage truck ~30k miles when I traded it in on a 2000 > GMC Sierra full size extended cab 4×4 which always gets better mileage than > the old, smaller truck…~16mpg under the same conditions.. > Mike >Alright, here is my question. I am not a newbie, but I have a question > that >seems that way. Where does all of my fuel go. I just bought a 96 4dr 4X4 >S-10 Blazer, 4.3L TBI w/ 90K. I just went on a road trip and got 11mpg >highway. I realize they have bad economy, and I accept that, but man. I >compression checked the engine, and all cylinders where great. It runs > very >smooth, with no sign that it is running rich on the plugs or exhaust. It >does not pull to the either side, so the alignment should be good. The >tires are a 35 pounds and are the correct size. I put replaced the air >filter, pvc, fuel filter, rotor, cap, wires and plugs before the trip. >There are no codes. The exhaust seems to flow well, I will do a more >detailed inspection this weekend. I am going to get a new O2 sensor >tonight, but that should not have that profound of an effect. My brother >gets better mileage with his 350 Tahoe, that just does not seem right. > Does >anyone have anything else I could check, or should I just deal with it. I >will be dechoking the engine (replacing air box and exhaust) in a week or >so. Your thoughts are greatly appreciated.
Response:
I know what you are talking about…My last truck was 95 GMC Sonoma High Rider which is basically an S-10..it was 4×4 extended cab with the 4.3 litre HO engine…the mileage on the highway was at best around 14 mpg….the truck was still a low mileage truck ~30k miles when I traded it in on a 2000 GMC Sierra full size extended cab 4×4 which always gets better mileage than the old, smaller truck…~16mpg under the same conditions.. Mike – Hide quoted text — Show quoted text – >Alright, here is my question. I am not a newbie, but I have a question that >seems that way. Where does all of my fuel go. I just bought a 96 4dr 4X4 >S-10 Blazer, 4.3L TBI w/ 90K. I just went on a road trip and got 11mpg >highway. I realize they have bad economy, and I accept that, but man. I >compression checked the engine, and all cylinders where great. It runs very >smooth, with no sign that it is running rich on the plugs or exhaust. It >does not pull to the either side, so the alignment should be good. The >tires are a 35 pounds and are the correct size. I put replaced the air >filter, pvc, fuel filter, rotor, cap, wires and plugs before the trip. >There are no codes. The exhaust seems to flow well, I will do a more >detailed inspection this weekend. I am going to get a new O2 sensor >tonight, but that should not have that profound of an effect. My brother >gets better mileage with his 350 Tahoe, that just does not seem right. Does >anyone have anything else I could check, or should I just deal with it. I >will be dechoking the engine (replacing air box and exhaust) in a week or >so. Your thoughts are greatly appreciated.
Response:
Alright, here is my question. I am not a newbie, but I have a question that seems that way. Where does all of my fuel go. I just bought a 96 4dr 4X4 S-10 Blazer, 4.3L TBI w/ 90K. I just went on a road trip and got 11mpg highway. I realize they have bad economy, and I accept that, but man. I compression checked the engine, and all cylinders where great. It runs very smooth, with no sign that it is running rich on the plugs or exhaust. It does not pull to the either side, so the alignment should be good. The tires are a 35 pounds and are the correct size. I put replaced the air filter, pvc, fuel filter, rotor, cap, wires and plugs before the trip. There are no codes. The exhaust seems to flow well, I will do a more detailed inspection this weekend. I am going to get a new O2 sensor tonight, but that should not have that profound of an effect. My brother gets better mileage with his 350 Tahoe, that just does not seem right. Does anyone have anything else I could check, or should I just deal with it. I will be dechoking the engine (replacing air box and exhaust) in a week or so. Your thoughts are greatly appreciated.
