96silverram

iTrader: (12)

Finally did a complete plug change, oil & filter, Bosch O2's, and hooked up my MSD DIS-4 ignition (had to send it in for a repair). I can't believe how much nastier this thing runs with just a simple tune-up. I've had a high RPM miss above 6,000 for awhile, but most of this I attributed to the MSD DIS-4 not being hooked up. The car really by mileage does not need a tune-up or so I thought, only put about 500 miles on the car since the last change, but that was almost 5 years ago I can't believe how bad my plugs looked, even my O2's were just black as charcoal! I installed a set of NGK TR55 (.055 pre-gap, checked), Mobil 1 M1-111 shorty filter, pair of Bosch O2's, MCCC (mopar combustion chamber cleaner, including TB & intake), Mass air meter cleaner, and I re-installed the MSD DIS-4 ignition box (in conjuction with my Delteq setup).

Wow, what a difference! The car just gets it now, from a 3k roll in first the 315/30/18 BFG Drags get squirly..... The car actually pulled all the way to 6300 rpm's without a miss until the soft touch kicked in. It has not pulled past 6k without a miss in 1/2 a year or more (ever since I removed the MSD DIS-4). The car even idles much better now, it actually sounds like it has a baby LT4 hotcam even though its the stock 96 grind.

Just thought I would share my good experience with a simple LT1 tune-up. (Oh, I almost forgot, I still hate changing plugs on a LT1, but having a BMR k-member and longtubes makes the job so much simpler.)

Spiers

iTrader: (7)

I've been battling that same high RPM miss ever since I bought my car. Tried pretty much everything. But I don't want to get rid of the good old optispark!

96silverram

iTrader: (12)

You don't have too, just get a Delteq, MSD DIS4, and a GEN III dynaspark JK

What are the symptoms of your miss.......?

Spiers

iTrader: (7)

Just the usual high RPM random misfire... usually in between 5-6k and in 3rd gear and up.

killagt

iTrader: (3)

how did you put MCCC in ? im using brake line hose, but after that I felt my car slugish or fast like before.

96silverram

iTrader: (12)

Spiers, have you checked all the normal items, coil, plugs, wires, opti?

Killagt, I actually fed the can of MCCC through the front throttle blades of the TB.

BTC

You may want to reconsider using Bosch O2 sensors in the future. From what I can gather, they tend to suck. Most people would recommend sticking with AC/Delco O2's.

lt1-xjs

My bosch o2's are 9 years old...,but the AC's are recommended.

96silverram

iTrader: (12)

Did not know that on the bosch O2's, what is it that sucks about the part?

lt1slowz28

heaters fail making them clog up and become lazy.


i bought denso o2s fixed my extremely rich condition i would get in closed loop.

96silverram

iTrader: (12)

Ok, I will keep that in mind when I replace the Bosch (probably go back to AC delco's).

killagt

iTrader: (3)

while the engine off or running ? you take off the intake and spray it thru the TB blade ? or thru some kind of hole on tb ? cause I cant find any vacumm hose attb for lt1 at all.

96silverram

iTrader: (12)

I just took the ram air box off the car (removed maf out of the way), while the engine is idling you can spray it into the TB through the crack. When the idle start to bog down a little just give it some gas to keep it running.

SoxXpupPeT

iTrader: (34)

Check your coil... should read ~8500 ohms...

http://shbox.com/1/coil_testing.jpg

PS: Sorry for the hi-jack. Just trying to help

Marc3.4V6

iTrader: (1)

Glad you got it running good. Sometimes my car runs good, some days it feels kind of slow, but even on a good day I feel like it has never run completely right and I have a fresh motor and replaced nearly everything except the ICM (was tested). Some of you guys are lucky, I can't even put a decent cam in that passes smog, my pitiful cam barely passed.

meine96ws6

iTrader: (4)

to finally get the car running right is a great thing.. happy for you..i bet you were grinning like a mug..

96silverram

iTrader: (12)

Believe me, it was a good day