Reliability

[JWadford]

Alright, my toy cummins is really nickle and diming me to death, just spent a hundred dollars for an fca and today it smokes an injector or injectors, last month was over a thousand dollars in headwork and another 2000 thousand in dual cp-3 kit, so to make a long story short i am not sure if i should trade it in as is or put it back to stock and trade it or fix it and sell it, i am going to need a reliable truck to haul my family and toys around is the 6. 7 with the six speed auto up to par ?:{

 

[HBarlow]

Yes, the new ISB6. 7s are "up to par" if you mean reliable, powerful, and enjoyable to drive but they are even less tolerant of serious modification than the HPCR ISB5. 9s. If you're going to buy a new one and modify it save yourself the expense and grief and keep the one you have.

I wonder, is it just bad luck that the heavily modified trucks are not very reliable and require lots of expensive parts to keep them on the road?

I've put a total of 600,000 miles on three of them, mostly on two of them, and have had no component failures even pulling heavy and with high mileage.

 

[TCDiesel]

What do you think cause the Injector(s) to fail? or why do you suspect the injectors are the problem?Your going to get mixed reviews on the 6. 7.

 

[macdaddy]

Oh Man

Alright, my toy cummins is really nickle and diming me to death, just spent a hundred dollars for an fca and today it smokes an injector or injectors, last month was over a thousand dollars in headwork and another 2000 thousand in dual cp-3 kit, so to make a long story short i am not sure if i should trade it in as is or put it back to stock and trade it or fix it and sell it, i am going to need a reliable truck to haul my family and toys around is the 6. 7 with the six speed auto up to par ?:{

Man I went that route with my 99, and made all the mistakes you are probably thinking you did.



Thats why I decided to leave the 05 stock.



Man I dont even have gauges. The dam thing has 325 Hp and over 600 lb ft of torque with 4:10. 1 its an animal stock.



Mac

 

[Regcabguy]

6.7 bargains.

If you're in the market for a 6. 7 consider one of the closing dealers. They've got barely two weeks to off their stock or sell it to another surviving dealer. John Hine Dodge here was on the news tonight and showed some bargains on the lot. It's really too bad about this dealership. I had good luck with their service dept. overall.

 

[JWadford]

What do you think cause the Injector(s) to fail? or why do you suspect the injectors are the problem?Your going to get mixed reviews on the 6. 7.

i just pulled the injectors and number 6 popped the solenoid up on one side and has the o-ring showing

 

[WoodChuck]

Dude, I hate to say it but on your other thread last week "Rail pressure low" I warned you about your injectors. High rail pressure kills injectors. Didn't you say you were going to take it out and beat on it after you but the new FCA in? Don't blame a heavily modded truck that's being beat on for failing, it's to be expected. (You also said you were looking for 1000 hp). If the motor isn't damaged you can still go backwards and get it closer to stock for better reliability. Limit your self to 100hp max additional fueling (ie: 50 hp injectors and maybe 50 hp program + airflow upgrades = 450-500 RWHP) and enjoy your wonderful reliable Cummins.

Or have two trucks one for playing and one for RVing.

 

[TCDiesel]

Thanks for the update.

 

[JWadford]

Dude, I hate to say it but on your other thread last week "Rail pressure low" I warned you about your injectors. High rail pressure kills injectors. Didn't you say you were going to take it out and beat on it after you but the new FCA in? Don't blame a heavily modded truck that's being beat on for failing, it's to be expected. If the motor isn't damaged you can still go backwards and get it closer to stock for better reliability. Limit your self to 100hp max additional fueling (ie: 50 hp injectors and maybe 50 hp program + airflow upgrades = 450-500 RWHP) and enjoy your wonderful reliable Cummins.

never blamed the truck, and yes i did have low rail press, and fyi the injector popped at 24000 psi, which a bone stock truck can see, and yes i do beat on it, and i was beating on it when it broke, its all part of having fun :-{}

 

[WoodChuck]

Yes indeed, fun costs money.

 

[lmills]

it is not the high pressure that blows the injectors apart, it is how fast the pressure is ramped up. What are you running for programming?

 

[JWadford]

it is not the high pressure that blows the injectors apart, it is how fast the pressure is ramped up. What are you running for programming?

, i was running smarty revo tnt on level 2, and now that i think about it i think i added rail pressure with the smarty, i think i left it on 2 rail pressure the other day when i had low rail pressurethe tst was turned off, and i turned the mp-8 up to 50 percent, with the tq management on wild, i am starting to think i should have ran no pressure on the smarty, and take the mp-8 off and turn the tq management down so its not so violent... , the other injectors look okay just number six solenoid popped up

 

[daytripper63]

Why is it always number 6 injector that seems to fail... Everyone and everything I have seen and heard has always been #6 injector is there any reason, does it take more abuse for some reason... ?

 

[JStieger]

, the other injectors look okay just number six solenoid popped up

JT - could you post a pick of #6?

 

[TCDiesel]

Why is it always number 6 injector that seems to fail... Everyone and everything I have seen and heard has always been #6 injector is there any reason, does it take more abuse for some reason... ?

Yes, # 6 is 3 to 1 By my Records, than # 5 than 1, I deal with the OP issues regularly, I hear it all to often... We have Modded rail(s) that will help lessen the effects of the waves and pulses that are created with cam style pumps. We have some good research on the subject found at our Site. you are welcome to contact Me for more info on a personal Note. . Evenings are the best to reach Me, at times I need to set the Phone down and makes some $.

 

[BDaugherty]

Alright, my toy cummins is really nickle and diming me to death, just spent a hundred dollars for an fca and today it smokes an injector or injectors, last month was over a thousand dollars in headwork and another 2000 thousand in dual cp-3 kit:{

How is headwork and dual cp3s considered "nickle and diming"? Around here, spending $50 here and $20 there every couple weeks on things like belts, hoses, water pumps, spark plug wires, and brakes would be considered nickle and diming. If you don't like spending money on things you don't need, it's real simple: stop doing it. If your truck keeps breaking, fine. But if you hot rod the fire out of it and then drive it like you stole it... I don't understand why you wouldn't expect some level of damage.



That's just my rant. Nobody take anything personally.

 

[GColeman]

How is headwork and dual cp3s considered "nickle and diming"? Around here, spending $50 here and $20 there every couple weeks on things like belts, hoses, water pumps, spark plug wires, and brakes would be considered nickle and diming. If you don't like spending money on things you don't need, it's real simple: stop doing it. If your truck keeps breaking, fine. But if you hot rod the fire out of it and then drive it like you stole it... I don't understand why you wouldn't expect some level of damage.



That's just my rant. Nobody take anything personally.

EXACTLY! Bone stock or slightly modded, the 5. 9 is pretty much bullet proof. But, major mods, big power and hard use can and will cause failure. It's just a simple case of "Pay to Play".

 

[JWadford]

JT - could you post a pick of #6?

i took them to industrial injection today, and they fixed it, cleaned all six and balanced them for nothing, even though i told them i was abusing it, only cost me fourty bucks in gas, i should have taken a pic... .

 

[JWadford]

How is headwork and dual cp3s considered "nickle and diming"? Around here, spending $50 here and $20 there every couple weeks on things like belts, hoses, water pumps, spark plug wires, and brakes would be considered nickle and diming. If you don't like spending money on things you don't need, it's real simple: stop doing it. If your truck keeps breaking, fine. But if you hot rod the fire out of it and then drive it like you stole it... I don't understand why you wouldn't expect some level of damage.



That's just my rant. Nobody take anything personally.

thats not all, i am constantly changing ball joints, u-joints, tie rods, and the ac quit, one of the bolts just broke off in the end of my crank and to repair that you cant go back stock, so 600 dollars in a balancer some bolts, a jig to drill out the broken bolt, and drill bits, the alt bracket cracked, i welded that up, there is more to it than the stuff i put on and yes it does nickle and dime even if you dont abuse it, and i just noticed my ats manifold has a crack in it, how do you hotrod an exhaust manifold:-laf

 

[JWadford]

EXACTLY! Bone stock or slightly modded, the 5. 9 is pretty much bullet proof. But, major mods, big power and hard use can and will cause failure. It's just a simple case of "Pay to Play".

i want a shelby