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Re: Dropping MPG
Hi Will,
It is mind boggling that's only difference between the fifteen and the optional nineteen tank, and that they are still doing it for the TJs: http://www.gottrail.com/TJ/TJfueltankconversion.html Must be a Kraut thing. God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Will Honea wrote: > > I found out early on that once the pump stops my MJ will hold just > short of 4 more gallons if I trickle it in until the filler hose is > full - but only if it's on a level surface. I keep my mileage figures > using a boxcar average of the last 4 tanks which gives me a much > better trend indicator.. > > One of these days I'll get ambitious and see if that tank has one of > those over-long vent hoses to make it the smaller capacity tank like > the YJ had but until then I always figure any one fill up may be a > "full tank" minus a gallon or two. |
Re: Dropping MPG
Billy ray, not only will the mileage drop, but it will quickly start
missing at idle with those fancy plugs in it. 4 mini posts just don't produce a nice fat spark the 4.0 likes it would seem. Same for the 'splitfires'. I have fixed a whole bunch of bad idles and bad mileage by simply tossing the 'new' bosch plugs in the trash. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) billy ray wrote: > > Kevin, > > I run with the regular Bosch Platinum plugs (#4203) in my 4 liter and put > the regular 4230s in Mark's 4.7 liter and they run flawlessly. > > Some people prefer copper plugs, in that case I use the Bosch Super # 7562s > > I started with the Bosch Supers about 30 years ago and the regular Platinums > about 20 years ago and I've never had any reason to change back to Champions > (or any other brand) Everyone has their personal preference though. > > I've considered getting the +4s next time, are you saying the mileage > dropped just after changing plugs? > > Bosch guarantees the plugs to run superior to other brands and will refund > your money > http://jobs.boschusa.com/AutoParts/S...PlatinumPlus4/ > > You might possibly have leaking or sticky injectors > http://i112.photobucket.com/albums/n...6/ecb3f58e.jpg > http://i112.photobucket.com/albums/n...6/ecb3f549.jpg > > It wouldn't hurt to clean the fuel system and injectors. Pat Goss on Motor > Week recommends adding a can of cleaner to a full tank of gasoline and > running that tank as low as you dare, refilling with just gasoline and > running that tank as low as you dare, then adding the cleaner to a second > tank and running that tank as low as you dare. Brands I have used and > recommend include SeaFoam, BG44k, Berryman B12 Chemtool, and Techron Cleaner > (not the Cleaner with Techron) > > Throttle Body Cleaning: All this requires is a can of sensor safe spray > cleaner and an old toothbrush. > http://www.imagestation.com/album/pi...?id=2122181169 > > What vacuum reading do you get in Neutral or Park? Your 16 inches is just a > tad low, recheck the idle in park and also check for a vacuum leak. > > > OK, engine vacuum is 16 in/hg at idle in gear, I checked the brakes > > for sticking calipers, all OK there, I tend to run my tires at 40 psi > > year-round. I did however use Bosch Plus 4 plugs when I replaced the > > NGKs. I have used Bosch plugs in Honda, Ford BB and SB engines, Chev > > L6, Toyota L4, VW L4, Audi V8 and BB Dodge engines with no problems. > > > > I would find it strange that the Bosch would not work in my 4.0L but > > stranger things have been known to happen. > > > > Any recomendations on plugs for a 4.0L ? > > Or plugs to avoid ? > > > > Kevin > > |
Re: Dropping MPG
Billy ray, not only will the mileage drop, but it will quickly start
missing at idle with those fancy plugs in it. 4 mini posts just don't produce a nice fat spark the 4.0 likes it would seem. Same for the 'splitfires'. I have fixed a whole bunch of bad idles and bad mileage by simply tossing the 'new' bosch plugs in the trash. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) billy ray wrote: > > Kevin, > > I run with the regular Bosch Platinum plugs (#4203) in my 4 liter and put > the regular 4230s in Mark's 4.7 liter and they run flawlessly. > > Some people prefer copper plugs, in that case I use the Bosch Super # 7562s > > I started with the Bosch Supers about 30 years ago and the regular Platinums > about 20 years ago and I've never had any reason to change back to Champions > (or any other brand) Everyone has their personal preference though. > > I've considered getting the +4s next time, are you saying the mileage > dropped just after changing plugs? > > Bosch guarantees the plugs to run superior to other brands and will refund > your money > http://jobs.boschusa.com/AutoParts/S...PlatinumPlus4/ > > You might possibly have leaking or sticky injectors > http://i112.photobucket.com/albums/n...6/ecb3f58e.jpg > http://i112.photobucket.com/albums/n...6/ecb3f549.jpg > > It wouldn't hurt to clean the fuel system and injectors. Pat Goss on Motor > Week recommends adding a can of cleaner to a full tank of gasoline and > running that tank as low as you dare, refilling with just gasoline and > running that tank as low as you dare, then adding the cleaner to a second > tank and running that tank as low as you dare. Brands I have used and > recommend include SeaFoam, BG44k, Berryman B12 Chemtool, and Techron Cleaner > (not the Cleaner with Techron) > > Throttle Body Cleaning: All this requires is a can of sensor safe spray > cleaner and an old toothbrush. > http://www.imagestation.com/album/pi...?id=2122181169 > > What vacuum reading do you get in Neutral or Park? Your 16 inches is just a > tad low, recheck the idle in park and also check for a vacuum leak. > > > OK, engine vacuum is 16 in/hg at idle in gear, I checked the brakes > > for sticking calipers, all OK there, I tend to run my tires at 40 psi > > year-round. I did however use Bosch Plus 4 plugs when I replaced the > > NGKs. I have used Bosch plugs in Honda, Ford BB and SB engines, Chev > > L6, Toyota L4, VW L4, Audi V8 and BB Dodge engines with no problems. > > > > I would find it strange that the Bosch would not work in my 4.0L but > > stranger things have been known to happen. > > > > Any recomendations on plugs for a 4.0L ? > > Or plugs to avoid ? > > > > Kevin > > |
Re: Dropping MPG
Billy ray, not only will the mileage drop, but it will quickly start
missing at idle with those fancy plugs in it. 4 mini posts just don't produce a nice fat spark the 4.0 likes it would seem. Same for the 'splitfires'. I have fixed a whole bunch of bad idles and bad mileage by simply tossing the 'new' bosch plugs in the trash. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) billy ray wrote: > > Kevin, > > I run with the regular Bosch Platinum plugs (#4203) in my 4 liter and put > the regular 4230s in Mark's 4.7 liter and they run flawlessly. > > Some people prefer copper plugs, in that case I use the Bosch Super # 7562s > > I started with the Bosch Supers about 30 years ago and the regular Platinums > about 20 years ago and I've never had any reason to change back to Champions > (or any other brand) Everyone has their personal preference though. > > I've considered getting the +4s next time, are you saying the mileage > dropped just after changing plugs? > > Bosch guarantees the plugs to run superior to other brands and will refund > your money > http://jobs.boschusa.com/AutoParts/S...PlatinumPlus4/ > > You might possibly have leaking or sticky injectors > http://i112.photobucket.com/albums/n...6/ecb3f58e.jpg > http://i112.photobucket.com/albums/n...6/ecb3f549.jpg > > It wouldn't hurt to clean the fuel system and injectors. Pat Goss on Motor > Week recommends adding a can of cleaner to a full tank of gasoline and > running that tank as low as you dare, refilling with just gasoline and > running that tank as low as you dare, then adding the cleaner to a second > tank and running that tank as low as you dare. Brands I have used and > recommend include SeaFoam, BG44k, Berryman B12 Chemtool, and Techron Cleaner > (not the Cleaner with Techron) > > Throttle Body Cleaning: All this requires is a can of sensor safe spray > cleaner and an old toothbrush. > http://www.imagestation.com/album/pi...?id=2122181169 > > What vacuum reading do you get in Neutral or Park? Your 16 inches is just a > tad low, recheck the idle in park and also check for a vacuum leak. > > > OK, engine vacuum is 16 in/hg at idle in gear, I checked the brakes > > for sticking calipers, all OK there, I tend to run my tires at 40 psi > > year-round. I did however use Bosch Plus 4 plugs when I replaced the > > NGKs. I have used Bosch plugs in Honda, Ford BB and SB engines, Chev > > L6, Toyota L4, VW L4, Audi V8 and BB Dodge engines with no problems. > > > > I would find it strange that the Bosch would not work in my 4.0L but > > stranger things have been known to happen. > > > > Any recomendations on plugs for a 4.0L ? > > Or plugs to avoid ? > > > > Kevin > > |
Re: Dropping MPG
The regular Bosch Platinum plugs just have the one post, just like a regular
spark plug. The only difference I know of is the center electrode down where it fires is platinum instead of copper. http://i112.photobucket.com/albums/n...06/Plat153.jpg Seeing how I change plugs every 2 years anyway there probably isn't much justification for the platinum.... If the +4s are causing him a rough idle Bosch will buy them back "Mike Romain" <romainm@sympatico.ca> wrote in message news:452B9CCC.D1CAACBE@sympatico.ca... > Billy ray, not only will the mileage drop, but it will quickly start > missing at idle with those fancy plugs in it. 4 mini posts just don't > produce a nice fat spark the 4.0 likes it would seem. Same for the > 'splitfires'. > > I have fixed a whole bunch of bad idles and bad mileage by simply > tossing the 'new' bosch plugs in the trash. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > billy ray wrote: >> >> Kevin, >> >> I run with the regular Bosch Platinum plugs (#4203) in my 4 liter and put >> the regular 4230s in Mark's 4.7 liter and they run flawlessly. >> >> Some people prefer copper plugs, in that case I use the Bosch Super # >> 7562s >> >> I started with the Bosch Supers about 30 years ago and the regular >> Platinums >> about 20 years ago and I've never had any reason to change back to >> Champions >> (or any other brand) Everyone has their personal preference though. >> >> I've considered getting the +4s next time, are you saying the mileage >> dropped just after changing plugs? >> >> Bosch guarantees the plugs to run superior to other brands and will >> refund >> your money >> http://jobs.boschusa.com/AutoParts/S...PlatinumPlus4/ >> >> You might possibly have leaking or sticky injectors >> http://i112.photobucket.com/albums/n...6/ecb3f58e.jpg >> http://i112.photobucket.com/albums/n...6/ecb3f549.jpg >> >> It wouldn't hurt to clean the fuel system and injectors. Pat Goss on >> Motor >> Week recommends adding a can of cleaner to a full tank of gasoline and >> running that tank as low as you dare, refilling with just gasoline and >> running that tank as low as you dare, then adding the cleaner to a second >> tank and running that tank as low as you dare. Brands I have used and >> recommend include SeaFoam, BG44k, Berryman B12 Chemtool, and Techron >> Cleaner >> (not the Cleaner with Techron) >> >> Throttle Body Cleaning: All this requires is a can of sensor safe spray >> cleaner and an old toothbrush. >> http://www.imagestation.com/album/pi...?id=2122181169 >> >> What vacuum reading do you get in Neutral or Park? Your 16 inches is >> just a >> tad low, recheck the idle in park and also check for a vacuum leak. >> >> > OK, engine vacuum is 16 in/hg at idle in gear, I checked the brakes >> > for sticking calipers, all OK there, I tend to run my tires at 40 psi >> > year-round. I did however use Bosch Plus 4 plugs when I replaced the >> > NGKs. I have used Bosch plugs in Honda, Ford BB and SB engines, Chev >> > L6, Toyota L4, VW L4, Audi V8 and BB Dodge engines with no problems. >> > >> > I would find it strange that the Bosch would not work in my 4.0L but >> > stranger things have been known to happen. >> > >> > Any recomendations on plugs for a 4.0L ? >> > Or plugs to avoid ? >> > >> > Kevin >> > |
Re: Dropping MPG
The regular Bosch Platinum plugs just have the one post, just like a regular
spark plug. The only difference I know of is the center electrode down where it fires is platinum instead of copper. http://i112.photobucket.com/albums/n...06/Plat153.jpg Seeing how I change plugs every 2 years anyway there probably isn't much justification for the platinum.... If the +4s are causing him a rough idle Bosch will buy them back "Mike Romain" <romainm@sympatico.ca> wrote in message news:452B9CCC.D1CAACBE@sympatico.ca... > Billy ray, not only will the mileage drop, but it will quickly start > missing at idle with those fancy plugs in it. 4 mini posts just don't > produce a nice fat spark the 4.0 likes it would seem. Same for the > 'splitfires'. > > I have fixed a whole bunch of bad idles and bad mileage by simply > tossing the 'new' bosch plugs in the trash. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > billy ray wrote: >> >> Kevin, >> >> I run with the regular Bosch Platinum plugs (#4203) in my 4 liter and put >> the regular 4230s in Mark's 4.7 liter and they run flawlessly. >> >> Some people prefer copper plugs, in that case I use the Bosch Super # >> 7562s >> >> I started with the Bosch Supers about 30 years ago and the regular >> Platinums >> about 20 years ago and I've never had any reason to change back to >> Champions >> (or any other brand) Everyone has their personal preference though. >> >> I've considered getting the +4s next time, are you saying the mileage >> dropped just after changing plugs? >> >> Bosch guarantees the plugs to run superior to other brands and will >> refund >> your money >> http://jobs.boschusa.com/AutoParts/S...PlatinumPlus4/ >> >> You might possibly have leaking or sticky injectors >> http://i112.photobucket.com/albums/n...6/ecb3f58e.jpg >> http://i112.photobucket.com/albums/n...6/ecb3f549.jpg >> >> It wouldn't hurt to clean the fuel system and injectors. Pat Goss on >> Motor >> Week recommends adding a can of cleaner to a full tank of gasoline and >> running that tank as low as you dare, refilling with just gasoline and >> running that tank as low as you dare, then adding the cleaner to a second >> tank and running that tank as low as you dare. Brands I have used and >> recommend include SeaFoam, BG44k, Berryman B12 Chemtool, and Techron >> Cleaner >> (not the Cleaner with Techron) >> >> Throttle Body Cleaning: All this requires is a can of sensor safe spray >> cleaner and an old toothbrush. >> http://www.imagestation.com/album/pi...?id=2122181169 >> >> What vacuum reading do you get in Neutral or Park? Your 16 inches is >> just a >> tad low, recheck the idle in park and also check for a vacuum leak. >> >> > OK, engine vacuum is 16 in/hg at idle in gear, I checked the brakes >> > for sticking calipers, all OK there, I tend to run my tires at 40 psi >> > year-round. I did however use Bosch Plus 4 plugs when I replaced the >> > NGKs. I have used Bosch plugs in Honda, Ford BB and SB engines, Chev >> > L6, Toyota L4, VW L4, Audi V8 and BB Dodge engines with no problems. >> > >> > I would find it strange that the Bosch would not work in my 4.0L but >> > stranger things have been known to happen. >> > >> > Any recomendations on plugs for a 4.0L ? >> > Or plugs to avoid ? >> > >> > Kevin >> > |
Re: Dropping MPG
The regular Bosch Platinum plugs just have the one post, just like a regular
spark plug. The only difference I know of is the center electrode down where it fires is platinum instead of copper. http://i112.photobucket.com/albums/n...06/Plat153.jpg Seeing how I change plugs every 2 years anyway there probably isn't much justification for the platinum.... If the +4s are causing him a rough idle Bosch will buy them back "Mike Romain" <romainm@sympatico.ca> wrote in message news:452B9CCC.D1CAACBE@sympatico.ca... > Billy ray, not only will the mileage drop, but it will quickly start > missing at idle with those fancy plugs in it. 4 mini posts just don't > produce a nice fat spark the 4.0 likes it would seem. Same for the > 'splitfires'. > > I have fixed a whole bunch of bad idles and bad mileage by simply > tossing the 'new' bosch plugs in the trash. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > billy ray wrote: >> >> Kevin, >> >> I run with the regular Bosch Platinum plugs (#4203) in my 4 liter and put >> the regular 4230s in Mark's 4.7 liter and they run flawlessly. >> >> Some people prefer copper plugs, in that case I use the Bosch Super # >> 7562s >> >> I started with the Bosch Supers about 30 years ago and the regular >> Platinums >> about 20 years ago and I've never had any reason to change back to >> Champions >> (or any other brand) Everyone has their personal preference though. >> >> I've considered getting the +4s next time, are you saying the mileage >> dropped just after changing plugs? >> >> Bosch guarantees the plugs to run superior to other brands and will >> refund >> your money >> http://jobs.boschusa.com/AutoParts/S...PlatinumPlus4/ >> >> You might possibly have leaking or sticky injectors >> http://i112.photobucket.com/albums/n...6/ecb3f58e.jpg >> http://i112.photobucket.com/albums/n...6/ecb3f549.jpg >> >> It wouldn't hurt to clean the fuel system and injectors. Pat Goss on >> Motor >> Week recommends adding a can of cleaner to a full tank of gasoline and >> running that tank as low as you dare, refilling with just gasoline and >> running that tank as low as you dare, then adding the cleaner to a second >> tank and running that tank as low as you dare. Brands I have used and >> recommend include SeaFoam, BG44k, Berryman B12 Chemtool, and Techron >> Cleaner >> (not the Cleaner with Techron) >> >> Throttle Body Cleaning: All this requires is a can of sensor safe spray >> cleaner and an old toothbrush. >> http://www.imagestation.com/album/pi...?id=2122181169 >> >> What vacuum reading do you get in Neutral or Park? Your 16 inches is >> just a >> tad low, recheck the idle in park and also check for a vacuum leak. >> >> > OK, engine vacuum is 16 in/hg at idle in gear, I checked the brakes >> > for sticking calipers, all OK there, I tend to run my tires at 40 psi >> > year-round. I did however use Bosch Plus 4 plugs when I replaced the >> > NGKs. I have used Bosch plugs in Honda, Ford BB and SB engines, Chev >> > L6, Toyota L4, VW L4, Audi V8 and BB Dodge engines with no problems. >> > >> > I would find it strange that the Bosch would not work in my 4.0L but >> > stranger things have been known to happen. >> > >> > Any recomendations on plugs for a 4.0L ? >> > Or plugs to avoid ? >> > >> > Kevin >> > |
Re: Dropping MPG
billy ray wrote:
> The regular Bosch Platinum plugs just have the one post, just like a > regular spark plug. The only difference I know of is the center > electrode down where it fires is platinum instead of copper. > > http://i112.photobucket.com/albums/n...06/Plat153.jpg > > Seeing how I change plugs every 2 years anyway there probably isn't > much justification for the platinum.... > > If the +4s are causing him a rough idle Bosch will buy them back I run plain copper spark plugs. Either Champion or Autolite. Actually I think the Autolite are better made. The fancy plugs do nothing but waste money. With one exception. The platinum (non fancy) or Irridium plugs do last a lot longer and don't gap out. The only real reason to use them is if getting at the plugs is a pain in the arse. For the I6 it's just too darn easy to change plugs and looking at the plugs is the best way to catch engine problems. my .02 quatloos. -- -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors Banks Header - and BEER, in the fridge! |
Re: Dropping MPG
billy ray wrote:
> The regular Bosch Platinum plugs just have the one post, just like a > regular spark plug. The only difference I know of is the center > electrode down where it fires is platinum instead of copper. > > http://i112.photobucket.com/albums/n...06/Plat153.jpg > > Seeing how I change plugs every 2 years anyway there probably isn't > much justification for the platinum.... > > If the +4s are causing him a rough idle Bosch will buy them back I run plain copper spark plugs. Either Champion or Autolite. Actually I think the Autolite are better made. The fancy plugs do nothing but waste money. With one exception. The platinum (non fancy) or Irridium plugs do last a lot longer and don't gap out. The only real reason to use them is if getting at the plugs is a pain in the arse. For the I6 it's just too darn easy to change plugs and looking at the plugs is the best way to catch engine problems. my .02 quatloos. -- -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors Banks Header - and BEER, in the fridge! |
Re: Dropping MPG
billy ray wrote:
> The regular Bosch Platinum plugs just have the one post, just like a > regular spark plug. The only difference I know of is the center > electrode down where it fires is platinum instead of copper. > > http://i112.photobucket.com/albums/n...06/Plat153.jpg > > Seeing how I change plugs every 2 years anyway there probably isn't > much justification for the platinum.... > > If the +4s are causing him a rough idle Bosch will buy them back I run plain copper spark plugs. Either Champion or Autolite. Actually I think the Autolite are better made. The fancy plugs do nothing but waste money. With one exception. The platinum (non fancy) or Irridium plugs do last a lot longer and don't gap out. The only real reason to use them is if getting at the plugs is a pain in the arse. For the I6 it's just too darn easy to change plugs and looking at the plugs is the best way to catch engine problems. my .02 quatloos. -- -- DougW -- 93 ZJ 4.0 http://revbeergoggles.com HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors Banks Header - and BEER, in the fridge! |
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