Rokktech Crank Sensor Installed...

[scottmcd]

I think that I'm going to order this. I by-passed my Banks over the weekend and am still getting a P336 code. Must be time to replace the sensor.

 

[OHale]

all I've seen so far is overhead milage increases. .

Glad to hear you're getting better mileage too.



I don't 'feel' the acceleration is quicker, it is. If you drove off with the parking brake on you would 'feel' that you weren't accelerating as fast. That doesn't mean you don't have the parking brake on.



I think it is time to unsubscribe from this thread. I've posted my experience with the sensor and they are similar to what other purchasers have experienced. Just trying to return the favor others have done for me by trying out new products.



Sincere good luck to all with your decision as to whether or not to buy

 

[Okey0]

what i meant to say is "all i've seen so far 'in this thread' is overhead milage"



i actually don't have the sensor, yet.

 

[steved]

I tend to agree---all I've seen so far is overhead milage increases. I've yet to see anyone post numbers involving hand calculated milage of before and after the install. And I don't buy into the "it feels like its accelerates better" comments. Feelings can be swayed by your inner conscience wanting to justify the cost of the sensor.



so, does anyone have any verifiable numbers on a milage increase due to this sensor?

For the couple tanks I have used:



old average (several tanks): 17. 4 mpg

new average (two tanks): 19. 1 mpg



Yep, and that is even a 600/6spd/4. 10s.



Did I mention this was HAND CALCULATED?!? And besides... my little old ST doesn't have one of them there fancy smancy computers... I need to figure it out the old fashioned way... I doubt two tanks is enough to really know though... I doubt it was that much of an increase.



And you CAN tell a difference at idle... if you read my post, it will not drag down when releasing the clutch at an idle and will simply spin the tires now were it would have stalled before... so there is a definate change, but how far up the "band" it goes beats me... my two-cheek dyno works ok, but it is far from calibrated. Butt, my two-cheek dyno does tell me it is smoother throughout the RPM range.



steved

 

[skorski]

rokktech sensor

I installed mine and noticed a drop in miles. Was doing 15 around town and now 13. This is from the overhead. We went to New Hampshire this week end towing 13 000 5th at 62 and only did 10. 4 did 11. 4 on the way home today . I think the 10. 4 was because we were climbing. Is there a wrong way to install this sensor becaust I am not happy and thinking of switching it back Ski Oo. Oo.

 

[FPettijohn]

Installed sensor Thursday and did a quick test (1 mile each way) and overhead showed 1. 6 mpg better. Ran 25 miles Saturday at steady 64 mph and got about 1mpg less (overhead) going to pull 5vr in 2 weeks and will hand calc, but air is getting cooler and am using remote start sometimes not sure if that is a fair comparison. Seat of the pants says less throttle at cruise.

 

[RSeger]

Thanks for the feedback. You were right about 5 mnutes to replace original sensor. I will contact Paul @rokktech. Ron

Well, my yellow light stayed on for about 20 minutes when I put my original sensor bck into my truck. But like magic, it turned itself off for no apparent reason after about twenty mintes of driving. This happened one other time, but I did not know how to check codes to identify the problem at that time.



After work tonight, I put my Rokktech sensor back into the truck (I am getting to be quite the quick change artist!). Yellow light did not come back on. I really think it idles more smoothly compared to the stock sensor.



Took it down and put in a full load of California diesel, and I have nearly a two hundred mile run to Monterey tomorrow night. Hopefully traffic will not be too bad and I can break 25mpg (just kidding), but hopfully will break 21 if I can run 65 to 68 mph.





2004. 5, 2500 SLT HO, Black QC, 4X4, 48RE, 3. 73

 

[JCotte]

I tend to agree---all I've seen so far is overhead milage increases. I've yet to see anyone post numbers involving hand calculated milage of before and after the install. And I don't buy into the "it feels like its accelerates better" comments. Feelings can be swayed by your inner conscience wanting to justify the cost of the sensor.



so, does anyone have any verifiable numbers on a milage increase due to this sensor?

OKeyO

Try reading all 150 posts. You will see that many members have hand calculated results. Everyone in the forum wants to read the last few posts and then jump in and have everyone else re write all the info. I have seen this problem in all the threads. I for 1 have verifiable hand calc's to show an overall increase of 2. 4 mpg. Oo. :-{}

 

[JCotte]

I installed mine and noticed a drop in miles. Was doing 15 around town and now 13. This is from the overhead. We went to New Hampshire this week end towing 13 000 5th at 62 and only did 10. 4 did 11. 4 on the way home today . I think the 10. 4 was because we were climbing. Is there a wrong way to install this sensor becaust I am not happy and thinking of switching it back Ski Oo. Oo.

SKORSKI

Did you completley follow the MFG Instructions in regards to where to hold pressure and which direction to hold that pressure while tightening it? If not you will not get anything out of the sensor like you should. I suppose if you held the pressure the wrong way you could actually retard the timing further. :-laf

 

[skorski]

Thanks Cotte I will recheck it today I was also second guessing my self on the install.

 

[OHale]

Proven Indeed

You have just proven your intelligence level.

.

... and by resorting to personal insults you have proven the true nature of your character

 

[JCotte]

Thanks Cotte I will recheck it today I was also second guessing my self on the install.

Skorski

Let me know how you make out after you recheck it.

John

 

[67guzzler]

... and by resorting to personal insults you have proven the true nature of your character

Can't we all be friends?



It really is a silly argument. Bob says to 100% disregard the overhead. Others (including me) suggest that the overhead as a relative measure to compare the before and after 2 degree timing adjustment is worthwhile. NOT for all bombs, just this one. Bombs that modify fueling (pressure & duration) will fool the overhead. But common sense suggests that simply moving the timing ahead 2 degrees and leaving all other factors the same would result in the exact same amount of fueling.



Bob's general rule is probably a good one. I just think this might be the exception to that rule.



Why don't we all agree to disagree? It's really not that big of a deal and doesn't justify getting to the point were we make statements about intelligence, etc...



I'm available for private sessions as needed.

[size=-2]Please send $50. 00 to the JGann Interpersonal Relationship Counseling Center (JGIRCC). Thank you for your support. [/size]​

 

[skorski]

rokktech sensor

Hay cotte Just went out and reinstalled the sensor. Took it for a 15 mi drive some stop and go most driving at 60 some at 30 . cleared the overhead when I started half way back the overhead was reading 19. 5 and. 20. 3 Looks like I installed it wrong the first time . Being Polish I have to do thing twice. Thanks Ski

 

[JCotte]

Hay cotte Just went out and reinstalled the sensor. Took it for a 15 mi drive some stop and go most driving at 60 some at 30 . cleared the overhead when I started half way back the overhead was reading 19. 5 and. 20. 3 Looks like I installed it wrong the first time . Being Polish I have to do thing twice. Thanks Ski

Ski

Glad it helped. I am sure being Polish and from Rhode Island it made it a bit more difficult :-laf Seriously though I know that if you do not follow it to the T that 2 degrees is so minute of a movement you will not see the Benefit. Mine took 3 tanks (I think to clean the injector spay pattern and combustion chambers) to get to 2. 4mpg hand calced. you should see your numbers increase gradually over then next few tanks. I am glad you decided to check back before you removed the mod because unlike some of the snake oil that gets passed around here this has worked for the vast majority of users if not all. feel free to let me know how it goes in time. Did you notice the low RPM difference as well? :--)

John

 

[hasselbach]

What's the deal? Relative does not apply to the overhead when you make electrical or fuelage changes. The slightest change in either will change the ECM and the signal it send to the overhead reading and it's always goes up and doesn't reflect the true results. It was never accurate from the factory in the first place. Are you afraid to get the real and factual mileage by hand calc and give us the comparison of real numbers? Or are you afraid that you may be wrong and are not getting the mileage your overhead reads. Why feed us numbers that don't give the real facts? If it's for the sake of argument, you won. You have just proven your intelligence level.



I'm done! Not worth my time. Hope you enjoy you high mileage truck.

Bobby, if you actually understood how the overhead monitor worked (like read the service manual), you would understand that moving the crank sensor would not affect its calculations. Timing boxes, pressure boxes however do affect the overhead due to the simple fact they alter the output of the computer post computer.

 

[67guzzler]

I wish you had told me about your service before I had a weak moment and responded to that cretin.

Now, now. This is a good first step.



But it sounds like someone needs some more "sessions" as it doesn't appear we have fully adopted and embraced all the JGIRCC princples..... :-laf

 

[CKimball]

ok... . back on topic... . does anyone have the low output slow california truck such as myself WITH a 47RE and 4;10 gears that can report back???>>>>... i need to do sumthing it is SLOW unless it has about 5 or 6k on its butt or back then it climbs/pulls like you cant believe... although i am taking it in again tommorow for its THIRD left rear axel seal in 4200 miles!! Hello Dealer... . is the axle bent? is the housing distorted?... bunch of loosers!! sorry had to vent... LOVE my truck... . then AGAIN it appears my dealer does too!!

Cameron

 

[OHale]

Now, now. This is a good first step.



But it sounds like someone needs some more "sessions" as it doesn't appear we have fully adopted and embraced all the JGIRCC princples..... :-laf

Sign me up for your 'how to deal with unpleaant internet people' sessions



I much appreciate your good words and intentions however, I do believe you should offer your services first to the chap who lost his argument and started with the insults. I just emailed you another check so that you can help BB.



Yes, I let my 'goat get got', but I don't take guff off folks indefinitely.

 

[crobertson1]

Has anyone noticed cooler EGT while towing or not towing for that matter?