??????bosch 4+ problems?????Maybe! - Land Rovers Only

LANDY96 · 08-11-2005, 09:33 AM

I read some information on these bosch 4 on Discoweb, and I wanted to run this by yall. I have had these in my 96 Disco for about 10k miles. I had not noticed any problems with them in the first 5k. BUT!!!!, I have noticed my gas milage dropping from almost 18.5 mpg on the highway, to bearly 17mpg on the highway. I also have had a few misfires. I just ran to houston this past weekend, I put injector cleaner in it, with supreme of course

( that hurt). Still same milage, but no misfires. Anyway, could all this be connected? I have 110k on my baby! Other than this, she drives perfect!

texasrover · 08-11-2005, 11:14 AM

18.5 MPG? Barely 17??

If only I could get that! I am running those Bosch 4s as well. I can get 15 mpg with 93 octane with the wind at my back and traveling down hill (coasting). I am lucky to get 13 mpg.

Seriously, I have not had any problems with those plugs. I also did not notice enough change in performance (improvement) to purchase then again. I am running 8.5mm Taylor Wires as well. Maybe you should think about new wires. Dont worry about spending an arm and leg for OEMs... any hot rod shop should carry a good 8mm or 8.5mm that is universal. You will have to cut it to the correct length but not a difficult task. Just do one wire at a time so you dont get them mixed up.

If it makes you feel any better, I am still jealous of that 17 miles per gallon.

texasrover · 08-11-2005, 11:15 AM

BTW... I have ran those plugs for around 40K miles.

vray · 08-11-2005, 11:52 AM

Quote:

Originally Posted by LANDY96

I read some information on these bosch 4 on Discoweb, and I wanted to run this by yall. I have had these in my 96 Disco for about 10k miles. I had not noticed any problems with them in the first 5k. BUT!!!!, I have noticed my gas milage dropping from almost 18.5 mpg on the highway, to bearly 17mpg on the highway. I also have had a few misfires. I just ran to houston this past weekend, I put injector cleaner in it, with supreme of course

( that hurt). Still same milage, but no misfires. Anyway, could all this be connected? I have 110k on my baby! Other than this, she drives perfect!

I am sure some people have had success with these plugs, but from all I have read, there are numerous extremely knowleable people who advise against using them due to a design issue that sometimes surfaces after a few thousand miles. Why risk it, there are LR proven plugs available. I have found with my truck that just because something is better quality and of superior innovation, it doesn't neccesarily translate into a suitable part.

LANDY96 · 08-11-2005, 01:34 PM

Yeah...... I am starting to get that picture. I am going to buy some Champion spark plugs, and I will just change plugs every 3 oil changes, as I run synthetic and change that at 5k! I really need to buy new wires too, they are original, and they have 110k on them. No light show at night though!!!

jeffreydv · 08-11-2005, 01:38 PM

I have been using +4's in my Disco and +2's in my RRC without any problems.

08-11-2005, 09:33 AM	#1 (permalink)
LANDY96 Senior Member Join Date: Jan 2005 Location: Beaumont, Texas Posts: 781 Gallery: 0	??????bosch 4+ problems?????Maybe! I read some information on these bosch 4 on Discoweb, and I wanted to run this by yall. I have had these in my 96 Disco for about 10k miles. I had not noticed any problems with them in the first 5k. BUT!!!!, I have noticed my gas milage dropping from almost 18.5 mpg on the highway, to bearly 17mpg on the highway. I also have had a few misfires. I just ran to houston this past weekend, I put injector cleaner in it, with supreme of course ( that hurt). Still same milage, but no misfires. Anyway, could all this be connected? I have 110k on my baby! Other than this, she drives perfect! __________________ Eric The Red 93 Range Rover Classic We will never "arrive" so the goal is to keep moving forward on our journey so we can periodically declare, "I am not what I want to be, but I am not what I used to be!" 96 DISCO SE7 5-SPEED SOLD ....okay couldn't live without a disco! 96 DISCO SD 5-SPEED -ARB Bumper -OME 2" Lift -2" spacers -Safari snorkel -15" steelies

08-11-2005, 01:34 PM	#5 (permalink)
LANDY96 Senior Member Join Date: Jan 2005 Location: Beaumont, Texas Posts: 781 Gallery: 0	Yeah...... I am starting to get that picture. I am going to buy some Champion spark plugs, and I will just change plugs every 3 oil changes, as I run synthetic and change that at 5k! I really need to buy new wires too, they are original, and they have 110k on them. No light show at night though!!! __________________ Eric The Red 93 Range Rover Classic We will never "arrive" so the goal is to keep moving forward on our journey so we can periodically declare, "I am not what I want to be, but I am not what I used to be!" 96 DISCO SE7 5-SPEED SOLD ....okay couldn't live without a disco! 96 DISCO SD 5-SPEED -ARB Bumper -OME 2" Lift -2" spacers -Safari snorkel -15" steelies

08-11-2005, 01:38 PM	#6 (permalink)
jeffreydv Member Join Date: Jun 2005 Location: New Milford, NJ Posts: 44 Gallery: 0	I have been using +4's in my Disco and +2's in my RRC without any problems. __________________ Jeff 1992 Range Rover 1994 Discovery 5 speed

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08-11-2005, 11:14 AM	#2 (permalink)
texasrover Senior Member Join Date: Dec 2004 Location: Ft. Worth, Texas Posts: 490 Gallery: 0	18.5 MPG? Barely 17?? If only I could get that! I am running those Bosch 4s as well. I can get 15 mpg with 93 octane with the wind at my back and traveling down hill (coasting). I am lucky to get 13 mpg. Seriously, I have not had any problems with those plugs. I also did not notice enough change in performance (improvement) to purchase then again. I am running 8.5mm Taylor Wires as well. Maybe you should think about new wires. Dont worry about spending an arm and leg for OEMs... any hot rod shop should carry a good 8mm or 8.5mm that is universal. You will have to cut it to the correct length but not a difficult task. Just do one wire at a time so you dont get them mixed up. If it makes you feel any better, I am still jealous of that 17 miles per gallon.

08-11-2005, 11:15 AM	#3 (permalink)
texasrover Senior Member Join Date: Dec 2004 Location: Ft. Worth, Texas Posts: 490 Gallery: 0	BTW... I have ran those plugs for around 40K miles.

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