help with P0420 please

[skneeland]

just a little update.

no thanks to EFI live, but i have found a solution.

On advice from some of of members here i tried the sparkplug anti-fouler (18mm) trick and after 2 weeks so far so good, no more check engine light.

$3 piece of hardware > $800 electronics

[pjaneiro]

just a little update.

no thanks to EFI live, but i have found a solution.

On advice from some of of members here i tried the sparkplug anti-fouler (18mm) trick and after 2 weeks so far so good, no more check engine light.

$3 piece of hardware > $800 electronics

If i were you i'd ask for a refund for the efli unit, that this is useless for the traiblazer pcm ever since the january updates, once you wrote your pcm with efi and the january update the pcm is screwy...i know i had to go see teh dealer so he could do a complete reflash from stock and then with hptuners ALL went good

[dfe1]

If i were you i'd ask for a refund for the efli unit, that this is useless for the traiblazer pcm ever since the january updates, once you wrote your pcm with efi and the january update the pcm is screwy...i know i had to go see teh dealer so he could do a complete reflash from stock and then with hptuners ALL went good

You guys are either way off the mark in what you're trying to do, or there's a hidden agenda behind your postings.
First point- EFILive is a tool, if you don't know how to use it, or are trying to use it to do something for which it was not designed, the problem lies with the user, not the tool. Also, most tools do not come with a baby-sitting service.
Second point- HPTuners is also a tool, albeit an inferior one. Maybe the dealer doing a complete reflash eliminated a problem created by previous modifications.
Third point- I have reflashed Trailblazer PCMs with the latest EFILive release with absolutely no problems.

[pjaneiro]

You guys are either way off the mark in what you're trying to do, or there's a hidden agenda behind your postings.
First point- EFILive is a tool, if you don't know how to use it, or are trying to use it to do something for which it was not designed, the problem lies with the user, not the tool. Also, most tools do not come with a baby-sitting service.
Second point- HPTuners is also a tool, albeit an inferior one. Maybe the dealer doing a complete reflash eliminated a problem created by previous modifications.
Third point- I have reflashed Trailblazer PCMs with the latest EFILive release with absolutely no problems.

1- I have no agenda,
2- I know how the tool works
3- because you don't have issues does not mean other don't, what year is your tb ? what revision is your pcm ? how do you use your unit ? what codes do you even disable ?

if you read the OP post, it's kinda hard to fuck it up when you just need to click on a code change it to disabled and then do write....so if you are telling me that the OP and myself can't do that....well, you should come over one day and see my lab...really i wonder if you would know half the instruments i use in my daily job....so please don't say to anyone they don't know what they are doing BEFORE learning about the situation or actually reading on it a bit, check around the forum you will see A LOT of similar issues concerning th new cals...

but just stating facts, i currently own a 2002 trailblazer, everthing was fine until they did the january updates, as soon as they did that, I was unable to have accerleration, the truck would be in limbo when i went wot, and anything i would write to it would "seem ok" but was never actually written, i had posted this issue, even the speedometer tables on efi are wrong, efilive does not write to the proper ones, i know some 2003 and 2004 also have this issue,

Now this problem can only be solved by having the dealer reflash to stock, i tried using the cals from efi and just dumping my backup, stayed the same, the nes cals adresses something that the pcm does not like, if you go on a certain forum you will see a lot of people not happy with their product ever since the updates

it used to be fine before, my po420 was properly written off, i never had a light, my codes for the rest would not pop up, and then poof

My friend came over with his hptuners i bought a licence and read the pcm, to my surprise not only were some settings never written such as po420 but my fuel tables were at zero upon wot, so....

on another note, i went to efans, and if you look at efile half the cels hptuners have are not there, hptuner might not be a good tool in your eyes, but i know a few companies dealing in traiblazers that have completely abandoned it for such reasons...

BTW if you want screen shots of all the stuff hpt does and efi live i would be more than happy, or if you want a copy of all the emails that were sent between me and efi or the dealer doing my tunes stating that indeed they are also having trouble with the efilife ever since their cal updates....

[ExtTB]

the antifouler works great for me....50,000 miles without the 420....havent tried hp tuners.....many people sayit the best for the TB,,,,but I have mine working with efans thanks to a pcm signal I made...efi doesnt turn off all fan or exhaust errors period.220,000 miles of tuning my truck....even some programmers cant program all the pcm version this suv has....love my trailblazer but it always runs rich hence the 2004 changes and the fans suck if you high rev the engine....tranny made it 215,000 first one ever had make it past 100,000....efi did allow me to stiffen up the shifts allowing the clutches to last longer...3-4 gear shift is the one that just will keep getting worse with time....

[skneeland]

You guys are either way off the mark in what you're trying to do, or there's a hidden agenda behind your postings.
First point- EFILive is a tool, if you don't know how to use it, or are trying to use it to do something for which it was not designed, the problem lies with the user, not the tool. Also, most tools do not come with a baby-sitting service.
Second point- HPTuners is also a tool, albeit an inferior one. Maybe the dealer doing a complete reflash eliminated a problem created by previous modifications.
Third point- I have reflashed Trailblazer PCMs with the latest EFILive release with absolutely no problems.

i have no hidden agenda, i neither work for, nor am affiliatied with HPT in any way. The coding for the PC10 pcm doesnt do what is says its supposed to do, plain and simple. Im pissed that the one thing i bought the software to do (retune my wifes TB after CAI and cat removal) it wont do properly and theres about zero chance of getting any further support for this application.

regarless, the problem is fixed and i dont see any need to pick up a copy of HPT anytime soon(the wife punches me every time i mention the words "turbo trailblazer")

[Chevy366]

General TB stuff here , I have a 06 and have tuned a few 06s , tuning on the P12 is just a little shy of the LS1 PCMs , shame the P12 is used in more than just the TB .
When the clutch fan goes out I will be looking to replace it with a e-fan setup if possible . I really wish there was more support for the P12 and TB in general , maybe when V8 is finished there will be more !
EFILive is a nice software and love the fact that you can list a table and it is easily found (B3702) just by entering the table number code and hit enter , easy lookup among a host of other great features .
I have a buddy that use HPTuners , he likes it , but he has also stated he wishes he had bought EFIlive instead of HPT .
dfe1 , have to say the flame came on there , poor guy just wanted/needed help .
Couple of years ago I , bitched and whined about TB support myself .
TBs where one great platform , terrible GM killed them off .
My $.02s

[dfe1]

dfe1 , have to say the flame came on there , poor guy just wanted/needed help .
Couple of years ago I , bitched and whined about TB support myself .
TBs where one great platform , terrible GM killed them off .
My $.02s

Yeah, I may have jumped to an incorrect conclusion, but when someone complains about poor response from the EFILive crew, I get suspicious-- this forum is filled with responses from Paul and Ross, trying to help people with problems. As for anyone who doesn't want EFILive any more, it shouldn't be too hard to sell and at least get some money back.