truck not running right after 3bar map

M

MikeSyclone

New member
so i took the sy out tonight for a little spin and at wot about 15 psi it would stumble/flutter and i would lose power, and drop to about 10psi and flutter up to 15 then drop back down to 10.

i have the rpm stage one turbo with no boost soleniod, running right off the wastegate.

i thought it might have been the stock map not allowing more than 14.7 lbs so i switched out to my 3bar, on the stock chip/tune. it ran ok for a little. still the same stumble at 15 psi but would only drop to 13-14 between shifts. heard a loud pop at wot so i decided to go nice and easy home.

it ran like shit. wook forever to build boost, idled like crap, sounded like i was running on 5 cylinders instead of 6.i pulled over, didnt see and vac leaks no obvious boost leaks, switched back to the stock 2 bar and it ran fine except for the prior problem it had. but got home perfect.

so what do you think the issue is with the truck? can the map be no good? i was thinking of getting a mbc to see if that helps out.
 
nallj92

nallj92

Active member
Re: truck not running right after 3bar map

in order for the computer to change fueling for the 3 bar sensor, you need to have a chip clalibrated to read the seansor and send enough fuel for it,

simple terms- you need a 3 bar chip to go with a 3 bar sensor for it to work right
 
cameronsclone

cameronsclone

New member
Re: truck not running right after 3bar map

It'll run like complete ass if the chip and map sensor dont match. Either get an ultimate or a custom burned 3 bar chip, or go back to stock 2 bar. Wha tdo you mean runs directly off the wastegate with no boost solenoid? do you have a manual boost controller as well or?
 
M

MikeSyclone

New member
Re: truck not running right after 3bar map

yes there is a van line from the turbo directly to the wastegate. no solenoid or boost controller
 
cameronsclone

cameronsclone

New member
Re: truck not running right after 3bar map

If you dont have any thing to regulate the vacuum pressure going from the turbo to the wastegate your only going to max out around 10psi boost. Try getting a manual boost controller or just picking up a boost solenoid.
 
turbodig

turbodig

Active member
Re: truck not running right after 3bar map

MikeSyclone said:
so i took the sy out tonight for a little spin and at wot about 15 psi it would stumble/flutter and i would lose power, and drop to about 10psi and flutter up to 15 then drop back down to 10.

i have the rpm stage one turbo with no boost soleniod, running right off the wastegate.

i thought it might have been the stock map not allowing more than 14.7 lbs so i switched out to my 3bar, on the stock chip/tune. it ran ok for a little. still the same stumble at 15 psi but would only drop to 13-14 between shifts. heard a loud pop at wot so i decided to go nice and easy home.

it ran like shit. wook forever to build boost, idled like crap, sounded like i was running on 5 cylinders instead of 6.i pulled over, didnt see and vac leaks no obvious boost leaks, switched back to the stock 2 bar and it ran fine except for the prior problem it had. but got home perfect.

so what do you think the issue is with the truck? can the map be no good? i was thinking of getting a mbc to see if that helps out.
Click to expand...


I gotta tell ya, doing this kind of stuff will get you a dead motor in a hurry.

As others have said, a 3 bar MAP only works with a 3 bar chip.

The ECU can't control boost if the solenoid isn't hooked up. Even then, the stock chip is expecting a stock turbo, and a stock WG actuator, so it won't know what to do with the stage 1 setup.

Further, the larger turbo will need more fuel, which the stock chip won't be providing. Adding a boost controller will get you additional boost, but it'll also likely get you a dead motor from lack of fuel.
 
cameronsclone

cameronsclone

New member
Re: truck not running right after 3bar map

What all do you have done to your truck? How are you monitering boost? If using the stock gauge you might as well bring your dog along for a ride and ask him what boost he feels, it's close to useless.
If I were you I'd look at this>>>>http://powertuneplus.com/syclone/keyingredients.shtm
and more specifically this>>>>http://powertuneplus.com/syclone/keyingredients.shtm#2_goodcombo
Tooky's site (powertuneplus.com) is full of great info. Datamaster and tunerpro are your friends and will help you get your truck fast while spending less money.
 
UR50SLO

UR50SLO

V6+2=LSXCamaro
Re: truck not running right after 3bar map

The minimum I'd have in any turbo car is...

Wideband O2 on a 2 1/16 pillar gauge
Accurate boost gague 2 1/16
AFPR
Good tuning software or data software(code59/Datamaster ect)
They are totally right about the fuel/turbo/boost ect.
With just the vaccume line between the turbo/actuator it'll start opening early and will slow the spool time. (Will take longer to reach desired boost) www.rjcracing.com makes a nice manual and simple boost controller. I use it on everything that comes here. It allows the actuator to stay shut till it reaches the desired boost for quicker spool.
There's nothing wrong with a good electronic boost controller if you've got the money... or if your using code 59 you can controll the stock boost solonoid.
Just a few thoughts,
Scott~
 
nello

nello

Active member
Re: truck not running right after 3bar map

turbodig said:
I gotta tell ya, doing this kind of stuff will get you a dead motor in a hurry.

As others have said, a 3 bar MAP only works with a 3 bar chip.

The ECU can't control boost if the solenoid isn't hooked up. Even then, the stock chip is expecting a stock turbo, and a stock WG actuator, so it won't know what to do with the stage 1 setup.

Further, the larger turbo will need more fuel, which the stock chip won't be providing. Adding a boost controller will get you additional boost, but it'll also likely get you a dead motor from lack of fuel.
Click to expand...


Speaking of Chips, are you still burning them Dig?
 
turbodig

turbodig

Active member
Re: truck not running right after 3bar map

nello said:
Speaking of Chips, are you still burning them Dig?
Click to expand...

Not to 'jack the original poster's thread, but I get quite a few questions about this, so it'll be a lot quicker if I just post it publicly where I can just link to it.

I won't sell a chip based on what mods you have, and then just send it to you. I don't do this, because it doesn't work, and it never has.

I do have a custom tune program, where you'll take a whole bunch of DM files, and I'll send you bins, and you'll send me files, and we'll go back and forth like this until it's working well. I believe Nolan does his in a similar fashion.

In order to do this, you'll need to have:

A laptop with Datamaster
A wide-band o2 setup, hooked up into the ECM.
Something to burn the files I send you. (Moates Flash + Burn works well, and is cheap)
Chip adapter (Moates G1 and Flash chip)

(Or, barring the above, just bring the truck.)

And, most importantly...
The willingness and understanding that this will take time, and probably a fair amount of work on your part to fix the problems that are usually wrong with these things. This is the thing that takes the most time in the process - in the 15 years I've been doing this, I've *never* had a truck that didn't have something that needed to be fixed. Anything from vacuum lines, to bad motors, and everything between.

I may also look at the first couple files, and tell you that you have a lot of things to fix before we can proceed.

The costs kinda vary, but are generally under $400, and are definitely less than the $700 Tooky got for his old ultimate. :) If you run 50# injectors, for instance, I charge more, since they're such a PITA to tune.

What you end up with, is a chip made for *your* truck, that will only likely run well in your truck.

PM for more details, although I'll warn you that my PM inbox is almost always full. Email generally works better.
 
UR50SLO

UR50SLO

V6+2=LSXCamaro
Re: truck not running right after 3bar map

Can't argue with that logic!!!! Very well said !

I try and tell local guys here with all kinds of different cars the same thing and they give me the deer in the headlight look.

Had a kid come over with a Suby that he'd torn apart.. got a mix of different parts that don't go together at all and could not put it back together. I spent 4hrs putting it back together and in the process found out he's got bigger injectors along with all the other stuff and no flash for the PCM. I got the answer "I'll drive it nice till I get it tuned" well ..yea right. It took a month and he blew the motor.
Then he calls for me to install a SAFC on a buddy's turbo car since it was running "Lean" and they were going to take it to the track and tune it. I asked.. .what's the O2 readings? Answer: Duahhh..
Ok.. what's the wide band say.... Answer: Again Duahh...
"Well it just seems lean"
I reply... so your telling me you have no Idea where it's at or where to go with it but you want me to give you the power with the SAFC to controll the injectors and then go make WOT passes at the track to tune it??????? NO NO and NO. That's stupid and stupider.
Don't know how it turned out but I won't do anything like that. Not worth my sleepless nights or them say'n "He hooked up the SAFC and now my motors blown" NO way... done with that and idiots that have not a clue how to tune.
Ok.. done ranting... :)
~Scott
 
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