One last shot... Breaking up!

[WyoSyclone]

Re: One last shot... Breaking up!

Patience Rob, patience! Lol

opcorn2: (psst, it's not the injectors )

We should start a pool for what the actual cause is.... donate it to some good charity.. certainly has me perplexed.... Since you ruled out the AFPR I'm leaning to chip, or to some ignition issue.

 

[thunderace31]

Re: One last shot... Breaking up!

Wow those are whats in the TY we just picked up today no wonder the thing idels like poop :roll: Im putting 60's in it with a new chip We also found out the Fuel pump is dieing a slow and painful death on the way home its getting hot and not pumping right anything under a half of tank of gas and it will not idle So guess In goes the Spare 304 pumper I have

All Cars and trucks can be a pain but if we keep at it well all get it sorted and go fast as HELL!

Im praying for you tonight also I really hope (Like many on here) this solves the issue for you :tup:

 

[cloneman315]

Re: One last shot... Breaking up!

that is not why the truck idles like poop Im pretty sure of it.

 

[thunderace31]

Re: One last shot... Breaking up!

that is not why the truck idles like poop Im pretty sure of it.

We shall see :lol:
Not sure if any one mentioned the fuel pump ( I think they did its late and I have been up since 4:30am ) But I have had a few pumps go bad and they can cause all kinds of things that dont make scene at all. So I personally thing it could be the inj. but like I said well see very very soon :tup:

 

[BoostedSUV]

Re: One last shot... Breaking up!

opcorn2: (psst, it's not the injectors )

We should start a pool for what the actual cause is.... donate it to some good charity.. certainly has me perplexed.... Since you ruled out the AFPR I'm leaning to chip, or to some ignition issue.

Chip would make sense but I've had this issue with 3 different ECM's, an ultimate chip, a Moates adapter with a custom tune, and the stock memcal by itself. Is it possible to a have a problem with the stock memcal and having it piggy backed with the Moates/ultimate stuff would be causing the problem? I've never thought to change the stock memcal since I'm not sure which of it's functions are still used when piggybacked?

 

[TYTILIDIE]

Re: One last shot... Breaking up!

To my knowledge the stock memcal only uses the ESC.

 

[WyoSyclone]

Re: One last shot... Breaking up!

Matt, do you have two O2 bungs, one for WB and one for factory? I just looked at one of your logs and it is displaying the problem in open loop.

And.... are you EGR delete?? Your Jun14 run (good running run) shows zero EGR TGT data... your 'PLX' run shows EGR TGT command data that is inversely proportional to your lean condition.... I'll get over to my tuning computer, grab a screenshot and post it up.

 

[BoostedSUV]

Re: One last shot... Breaking up!

Rob the 'june 14' was before I had the wideband installed.

I do have the wide band on a seperate bung right before the Cat and I do have an EGR delte. I asked Nolan about the EGT tgt and he said that's part of the WBO2 patch. I had the issue before I put the wideband in, I just put the wideband in to confirm the O2 reading.

 

[WyoSyclone]

Re: One last shot... Breaking up!

Did you remove the EGR solenoid, or just the valve?

 

[BoostedSUV]

Re: One last shot... Breaking up!

I removed the solenoid, the valve, and all the lines. I just put the block off plate on the Upper intake. I didn't pipe tap and plug the port on the underside.

 

[WyoSyclone]

Re: One last shot... Breaking up!

Rob the 'june 14' was before I had the wideband installed.

I do have the wide band on a seperate bung right before the Cat and I do have an EGR delte. I asked Nolan about the EGT tgt and he said that's part of the WBO2 patch. I had the issue before I put the wideband in, I just put the wideband in to confirm the O2 reading.

So, have you ever replaced the O2 sensor? As soon as it goes into closed loop the O2 millivolts reading just starts banging around, from a low of around 80 (your lean condition) up to 'normal' levels, and your AFR's follow into your lean condition.
When you put the wideband in to confirm the O2 reading was it just reading on the PLX gauge, or was it integrated into the ECM? I'm kinda leaning with Dig and his original thought of it being in the O2 circuit... an O2 sensor sending false readings in closed loop would surely cause what the DM log is showing us.... I'll post another screen shot tomorrow showing the O2 MV while it's going through it's issues in closed loop.


This screen shot is where I thought I was seeing the correlation between EGR TGT and your AFR TGT. Notice how vacuum falls even though TPS is relatively constant (no load condition). I'm not even really sure what the EGR TGT signifies, as the label has been changed somewhere along the way in DM, and the help file hasn't been updated. But, if your EGR solenoid has been removed that takes it out of the loop as a vac issue cause.

 

[BoostedSUV]

Re: One last shot... Breaking up!

UPDATE: I know everyone was patiently awaiting a verdict, so here it is!

First let me thank Nick (NJ93TY) for swinging by my house and dropping off the TB gasket and new o-rings for the fuel lines. I had a lot going on tonight so his help is the only reason i got the truck back together tonight instead of tomorrow!!


Well the new injectors are in, no leaks, set base fuel pressure to 45PSI, re-burned a chip with a base tune (from Nolan), replaced throttle body gasket, and aside from that everything went back together as it came apart.

I fired the truck up and let it idle for about 10mins (40 degrees outside so it didn't warm up fast!) and gave it a go... Truck idled smoother than ever and when I slowly brought it up through RPM range it went smooth and flawlessly to 5k! I let it sit another 5 or so minutes idling and gave it another shot with the same results... ZERO off idle stumble, and ZERO hesitation or lean spots!

Let me note that I didn't drive the truck yet, and was 11:30 PM so I didn't want to piss the neighbors off so I didn't let it idle long enough to reach peak operating temp, and I just tried it in park in my driveway as I have been for 4 months. The truck did go into 'closed loop' however. The base tune is on the rich side so it needs to be fine tuned. I will hook it to the laptop tomorrow and take it for a ride to see if anything changes but for now that is the ABSOLUTE best the truck has ever idled, came off of idle, and smoothest it has ever gone through the RPM since I got it. Could just be the cool air and not fully warming up, but tomorrow will tell that.

I'm not calling it fixed yet, but I will know better tomorrow when I take it for a ride and really let it warm up.

 

[BoostedSUV]

Re: One last shot... Breaking up!

The vacuum on that DM file is incorrect Rob, for some reason when I swapped ECM's and fired it up that's the reading I was getting. I shut the truck off, restarted it and datalogged again and the vac reading was normal. I have that DM file as well if you would like to see it.

 

[BoostedSUV]

Re: One last shot... Breaking up!

I am going to be dying all day at work! I want to get home and drive the truck around for a while so I can report back with total confidence! Last nights results were very promising though! I should know for sure in about 12 hours....

 

[thunderace31]

Re: One last shot... Breaking up!

UPDATE: I know everyone was patiently awaiting a verdict, so here it is!

First let me thank Nick (NJ93TY) for swinging by my house and dropping off the TB gasket and new o-rings for the fuel lines. I had a lot going on tonight so his help is the only reason i got the truck back together tonight instead of tomorrow!!


Well the new injectors are in, no leaks, set base fuel pressure to 45PSI, re-burned a chip with a base tune (from Nolan), replaced throttle body gasket, and aside from that everything went back together as it came apart.

I fired the truck up and let it idle for about 10mins (40 degrees outside so it didn't warm up fast!) and gave it a go... Truck idled smoother than ever and when I slowly brought it up through RPM range it went smooth and flawlessly to 5k! I let it sit another 5 or so minutes idling and gave it another shot with the same results... ZERO off idle stumble, and ZERO hesitation or lean spots!

Let me note that I didn't drive the truck yet, and was 11:30 PM so I didn't want to piss the neighbors off so I didn't let it idle long enough to reach peak operating temp, and I just tried it in park in my driveway as I have been for 4 months. The truck did go into 'closed loop' however. The base tune is on the rich side so it needs to be fine tuned. I will hook it to the laptop tomorrow and take it for a ride to see if anything changes but for now that is the ABSOLUTE best the truck has ever idled, came off of idle, and smoothest it has ever gone through the RPM since I got it. Could just be the cool air and not fully warming up, but tomorrow will tell that.

I'm not calling it fixed yet, but I will know better tomorrow when I take it for a ride and really let it warm up.

AWESOME! I have had Idle issues with the 50lb injectors on every thing they have been in from GN's to mustangs they dont have a good idle quality do to the crappy spray pattern they have. I hope the issue is solved and Im waiting on the verdict

 

[WyoSyclone]

Re: One last shot... Breaking up!

:tup: Very cool! You had the problem before when the truck's operating temp was down in the '80s.... so you may be fixed.

So, if it's fixed.... I'm ready for an injector guru to tell me how they could have caused the problem at specific RPM's.... scratching my head on this one!

 

[Quickstop [UK]]

Re: One last shot... Breaking up!

Another strike for the 50#s.

This is great news - I was biting my nails in case you didn't find it but this is a long thread and everything appears to have been covered! It looks like the injectors were the same problem for you as they were for me.

I have a set for sale but right now I can't imagine why anyone would want them.

I think you owe us a video of it running as well :tup:

Great news.

So the title of the thread - "one last shot" is null and void? You're keeping it?

Now you can tune it, upgrade the turbo and have higher boost and better knock prevention without maxing your duty cycle.

I remember how pleased I was when I got my injectors in and the truck ran good.... awesome for you.
:tup:

Now onto the reason why they did this...lemme think on it for a second or two...

 

[BoostedSUV]

Re: One last shot... Breaking up!

Like I said I'm going to drive it around tonight and really get a definite answer. I'm pretty convinced that its fixed but I really need to test it more to be sure. Until then I'm not calling it a wrap. I can say with 100percent certainty that the truck did not miss a beat last night and it was smoother than ever! I damn near did a back flip out of the truck! Haha

I've never liked the 50s since I put them in the truck but I just assumed that it was bc I had a modded truck and didn't relate it to that specific "upgrade". I will know better tonight and I will report back the findings! :tup:

Rob I'm with you, I don't like just knowing its fixed, I want to know why its fixed! Why were the injectors, if that is indeed the case, causing my such issue a specific spot? I hope turboj91 chimes in because he had some great info on injectors and he came up with a theory. I will let him explain it because he was the first one to call out injectors a while back and I was afraid to bite the bullet. I will let him explain... Jim take the podium, but don't bow yet until I report back tonight. :tup:

 

[Quickstop [UK]]

Re: One last shot... Breaking up!

I think there might be some EM interference or a harmonic in the injectors or the coil that cuase them at specific frequency of pulse to be affected. That would be why it was so specific.

I want to know as well.

The 50#s are just weird - someone should sticky that you shouldn't buy them. Sounds as bad as Chinese Walbros or the defective Melling pumps..

Always assuming they are the problem.

I think you should possibly consider putting the 50s back in and seeing if you can recreate the problem, then you really know it's them. Maybe.

I know I'd be reluctant to mess with a working truck....

 

[TYTILIDIE]

Re: One last shot... Breaking up!

Like I said I'm going to drive it around tonight and really get a definite answer. I'm pretty convinced that its fixed but I really need to test it more to be sure. Until then I'm not calling it a wrap. I can say with 100percent certainty that the truck did not miss a beat last night and it was smoother than ever! I damn near did a back flip out of the truck! Haha

Dude, quit bein a puss and drive that bitch to work:lol: