Manifold vaccuum and knock/pinging/detonation
From : Annonymous
Q: hi guys anyone know if there is a direct relationship between knock and manifold vaccuum for instamce if the there is knock would the vaccuum be low i am not suggesting that low vaccuum would present knock but i need some visual indicator of when knock could occur and a vacuum gauge would get me kicking the cruise control off and winging it footwise. the reason i ask is i cannot hear the pinging so my other half is the knock indicator but was driving today without a co-pilot so had to guess it. i wondered if a vaccuum gauge would serve as a good indicator when loading it up going up hills etc. -- kind regards jenny and her tribe of survivors. .
Replies:
From : redneck tookover hell
a gasoline engine under load when it is most likely to knock-ping has a low vacuum due to the throttle opening being large. beyond that i have no idea what you are talking about or what your question is anyone know if there is a direct relationship between knock and manifold vaccuum for instamce if the there is knock would the vaccuum be low ill start watching reality tv shows when i can vote people off the planet. .
From : Annonymous
on wed 19 nov 2003 184640 -0700 miles unknown@unlistedspam.com wrote i had that friggin gas cap causing the check engine light when i 1st got the dakota... drove me crazy because it duh went away from tank to tank... lol found out from the folks in this ng what it was then had it pointed out to me by a gas jockey in oregon that it tells you on the gas cap that its going to happen.. check your gas cap. if it doesnt seal that will cause the light to come on. if the cap is fine the next thing to check is the rubber hoses coming off the tank. on my 2001 qc 1500 5.9l a small hose was ruptured. it had something to do with venting the tank to maintain proper pressure so i was told. go to autozone and have them read the code for you. mine read emissions leak. jerry brandt wrote developed a miss. service engine light comes on. i just purchased this used turck with 107000 miles on it. after driving it a day or so i filled the gas tank with regular gas. a couple days later the service engine light came on. checked everything under the hood and guages ok. decided maybe gas had water or wasnt a good batch and added injector cleaner additive. disconnected the baterry for a few minutes to reset computer.. drove for three days and the service engine light came on again. the engine also had a noticeable miss. disconnected battery again to reset computer. changed spark plugs. miss is not as noticeable at idle and in gear but you can feel it every once in awhile. opinions suggestions .
From : Annonymous
on 20 nov 2003 073145 gmt mopar440@aol.comnet.org redneck tookover hell wrote a gasoline engine under load when it is most likely to knock-ping has a low vacuum due to the throttle opening being large. beyond that i have no idea what you are talking about or what your question is ok thats what i thought so i will mosey down and get a gauge then when going up hills i can get my other half to tell me when it pings and after that keep the vaccuum above that point. see you knew what i meant all along. g -- kind regards jenny and her tribe of survivors. .
From : dominyon
i think he guessed on 20 nov 2003 073145 gmt mopar440@aol.comnet.org redneck tookover hell wrote a gasoline engine under load when it is most likely to knock-ping has a low vacuum due to the throttle opening being large. beyond that i have no idea what you are talking about or what your question is ok thats what i thought so i will mosey down and get a gauge then when going up hills i can get my other half to tell me when it pings and after that keep the vaccuum above that point. see you knew what i meant all along. g -- kind regards jenny and her tribe of survivors. .
From : redneck tookover hellredneck tookover hell
go to a wrecker and get some headrests from a car than go to a hardware store and get some glue. i think a large tube of liquid nail would be appropriate ill start watching reality tv shows when i can vote people off the planet. .
From : redneck tookover hell
i think he guessed thats what i told him troll whats your guess ill start watching reality tv shows when i can vote people off the planet. .
From : budd cochranredneck tookover hell
valid size they would be worth a fortune and i think that you can see why. -- if at first you dont succeed youre not cut out for skydiving . 222 272321 panvb.1646$n91.1234@02.roc.ny no there are others here with high pitched voices and not of the female gender. . . . -- budd cochran in tribute to the united states of america and the state of israel two bastions of strength in a world filled with strife and terrorism. ------ on sat 22 nov 2003 131843 gmt budd cochran mr-d150spam@citlink.net wrote voice of experience yonzie vvvbg i couldnt tell was it very high pitched .
From : Annonymous
im having a problem with the paint on my 97 dakota. the dealer said the paint is delaminating they are supposed to be contacting dodge because the paint is peeling off in sheets. ive seen others on the roads here in so. cal but mine just started. im going to raise a stink if dodge doesnt fix this. you expect problems like the paint fading or chips but not just falling off in 3 to 5 square inch sheets. if anyone else out there is having the same problem please reply. there is power in numbers. my 2003 2500slt cummins quadcab 4x4 has the same problem.. just sneeze and it makes a chip especially around the door edges and tailgate. also it seems to scratch easier than any other vehicle ive ever owned. ive seen neons and others that have huge patches of paint that has peeled off while at the car wash just primer showing in these spots... the paint is about the only thing i would change on my dodge otherwise i love the truck!!!! this may only be a problem with my truck but i thought id post just in case others seem to have similar problems. my truck 2002 3/4 ton 4x4 diesel paint chips very easily. after 6 months and not going down gravel roads i began to notice paint chipping. i have previously owned chevys and they were used offroad way more than this dodge with very little paint problems. any insight. .
From : nosey
jenny3kids@msn.net wrote on sat 22 nov 2003 101204 -0500 curmudgeon curmudgeon@noway.com wrote something is wrong with your truck. nope. wrong. you as so may americans are wont to do form your conclusion on too little information. we live at 5200ft and climbing hills out of that to even higher altitudes will produce knock in all but the finest of machinery. as redneck suggests the onset of pinging is an indicator of lean times ahead. i merely need to know when that onset is and since i am deaf in the frequency range a vacuum gauge will indicate for me to lift off and subsequently travel that length of the rise a little slower. going up a grade of gas or even to the top grade will reduce the onset but it seems foolhardy to this fiscally poorer individual that burning tank full after tank full of gas at 10c a gallon more to relieve about 30 second of potential knock once every three weeks is frugally derelict. a $12 vacuum gauge on the other hand... sigh the world is full of experts. if you recall you did post a similar question to this group back in may of 2002. that may be why i remembered you as some sort of a grumpy old fart. i recommended then that you install a knock sensor and wired up an indicator with an adjustable switch to set up a visual warning. it would be an inexpensive approach to your unique situation. if you think this is beyond your scope let me know and i will help you design a system to fit your needs. i cant do the install for you but it should not be hard to do. .
From : curmudgeon
the idea is to have no ping...not to simply avoid it by not opening the throttle. something is wrong with your truck. suggest first going up a grade in gasoline. higher octane will solve knock/ping problems. on 20 nov 2003 073145 gmt mopar440@aol.comnet.org redneck tookover hell wrote a gasoline engine under load when it is most likely to knock-ping has a low vacuum due to the throttle opening being large. beyond that i have no idea what you are talking about or what your question is ok thats what i thought so i will mosey down and get a gauge then when going up hills i can get my other half to tell me when it pings and after that keep the vaccuum above that point. see you knew what i meant all along. g -- kind regards jenny and her tribe of survivors. .
From : redneck tookover hell
the idea is to have no ping...not to simply avoid it by not opening the throttle. some years ago the automakers considered the hint of ping the sound of economy there are varying degrees of ping. they did not mean loud pinging ill start watching reality tv shows when i can vote people off the planet. .