advise please

[turboalero]

when im driving it bogs in the low rpm between the 1500-3500. on the dyno its good. but when driving its boging out any idea at all will help

[MMGT1]

Do you have a tuning program? Are you talking about your torque conveter locking too low, or are you running timing too low in that region? I should ask if your manual or auto first....

[turboalero]

its auto

[MMGT1]

Tuning it yourself? 40 or 45E?

[turboalero]

whats that trans? 4e40 i think

[turboalero]

just talked to the guy tunung my car he says its full lean like the fuels getting cut off. but the data log isnt showing it

[MMGT1]

Dont kow how your tuner would feel about it, but you could print this off and ask him to try it. Would be nice to see a scan of it....

Start with this:

http://i823.photobucket.com/albums/zz159/MMGT1/HPTuners/th_4T40ShiftTables.jpg (http://s823.photobucket.com/albums/zz159/MMGT1/HPTuners/?action=view&current=4T40ShiftTables.jpg)

Also, set TCC Max to 100 for entire table and TCC Min to 50 for entire table

[turboalero]

imma send it to him on mondy and c whats he says. he has grand ams so i dont kno if its the same tune.
is it easy to tune myself?

[MMGT1]

I have more aggressive tables that you could try there but that one works well. If hes willing, take a memory stick with you and get a copy of the tune and a log, but like I said, if he's willing... You know what program he's using? I'd just like to see what the 02 is reporting

[turboalero]

will it make a diff. if i only have the front sensor

[MMGT1]

You've deleted the #2 02 sensor? As long as the DTC's have been removed there is no problem there. Get rid of the cat over temp protection too

[turboalero]

i made my own turbo back exhaust installed two bums for the front o2 and wideband i was going to install the rear after tuning to get throw emission test here

[[ion] C2]

Told you already, it's more than likely the TPS. Just get a new one they're $20-30.

just talked to the guy tunung my car he says its full lean like the fuels getting cut off. but the data log isnt showing it
the datalog would show it if the sensor sees it and he's actually logging the sensor data like he should be.

[MMGT1]

Yea C2, we need to see a scan of this. Ive helped a few 3800 guys with bogging and it has been, 9 times out of 10, timing too low in cruise. I have no idea if the shifts are set up right first off. If its shifting in the right places, then we need to see timing tables. If those are good then it's time to look at the sensors like you said there.
You are probably right though man, if the tune is set properly that would be the first place to look, then if its not the TPS the Crank Position Sensor seems to be the next place to look as of late....

[a.graham52]

hell if he could just swap a known good sensor out of a friends car or something that rule out or conferm the sensor quick and easy

[MMGT1]

I replaced mine about a month ago. Not that bad either, it was about 50 bucks if I remember for a dealer unit

[turboalero]

imma try the sensors quick on monday. quick question doses anyone kno where the white vac hose that goes in the wiring harness to the tb goes to?

[turboalero]

i do all work on my car but im going to have to ask the tuner to install the parts because it al hour from my house an i kno they charge 100 per hour. i am a service writer at my shop so i kno there gonna charge an arm n leg. but i need my alero.

[[ion] C2]

it goes to the HVAC in the dash

when my TPS was bad I was getting lean spikes at low throttle conditions

[AleroB888]

I would say vacuum leak, since they are pretty common in custom systems, except his car has no MAF sensor where it normally causes a bogging issue.

Always carry an extra tps (and other sensors if you can afford them :) )

[turboalero]

tryed tps but same problem. whats do yall think about the vss it only does it when it driving on the street ehrn all tires are moving could that do it.

[turboalero]

lmfao dude couldn't figure it out. he did a free tuning. checked it myself all it was, was low fuel... haha imma the tune was going to be 500. now i can buy som rods and pistions

[billytheman1188]

lmfao dude couldn't figure it out. he did a free tuning. checked it myself all it was, was low fuel... haha imma the tune was going to be 500. now i can buy som rods and pistions

500 for a tune!? wtfffffff

[kwhauck]

In Denver at the preferred shop its either $495 for them to tune it. (which is highly reccomended, they are the best in the area and have tuned a lot of GM vehicles and have Colorados only 9 second evo) OR you can rent the dyno for the entire day for $500 and do it yourself.......OR you can do both for $1000. You can have the dyno all day and professional tuning and can tune it several different boost settings if you have the dyno all day.

[billytheman1188]

In Denver at the preferred shop its either $495 for them to tune it. (which is highly reccomended, they are the best in the area and have tuned a lot of GM vehicles and have Colorados only 9 second evo) OR you can rent the dyno for the entire day for $500 and do it yourself.......OR you can do both for $1000. You can have the dyno all day and professional tuning and can tune it several different boost settings if you have the dyno all day.

Damn....thats crazy. But i guess if you have the $$$$ to boost/build your engine you can afford that :lol: I paid $100 for mine....obviously wasn't on a dyno and Mike already had the files loaded on his computer for a similar set up. He made a few changes and she's running better than ever :)

[turboalero]

he tuned it to 12 psi on stock block running it at 10 omg it makes a diff. tune tune tune. yea 500 is good in va. most of the time they say 700. 150 for hptuner file and the rest in pocket. lol hes now doing my gsx for 30 psi bushur engine

[JLw7123]

he tuned it to 12 psi on stock block running it at 10 omg it makes a diff. tune tune tune. yea 500 is good in va. most of the time they say 700. 150 for hptuner file and the rest in pocket. lol hes now doing my gsx for 30 psi bushur engine little off topic do u have the 6 bolt or the 7 bolt also do u have the 2.0, 2.3,2.4 engine. my buddy is currently building a cayenne red gsx 6 bolt right now hp goal is 500hp.

[turboalero]

6 built engine big 20g turbo tuned to 23psi hoping to get 30 right now getting 480hp will let u kno after tune how much HP

[[ion] C2]

I paid $100 for mine....obviously wasn't on a dyno
That's because it's not what's considered tuning. It takes time and skill and the use of an expensive dyno to properly adjust the timing and fueling on a car to perfection.

$500 is the general price for a proper fuel/spark/general dyno (& street) tune.

[billytheman1188]

C2;609742']That's because it's not what's considered tuning. It takes time and skill and the use of an expensive dyno to properly adjust the timing and fueling on a car to perfection.

$500 is the general price for a proper fuel/spark/general dyno (& street) tune.

So what your telling me is all the time you take to tune your car on the computer is a waste of time cause its not as good of a tune than a dyno tune?:lol:

[[ion] C2]

So what your telling me is all the time you take to tune your car on the computer is a waste of time cause its not as good of a tune than a dyno tune?:lol:
I assume by you saying "tune your car on the computer" you mean me adjusting values while doing street tuning. That's right; you need a dyno to efficiently tune and maximize power gains safely. What I've done over the years is just guess and check work. I can get the fueling adjusted to where I think it should be, but as for spark advance, it's just a guess. It's not optimized whatsoever. Need to be able to see the dyno graph to monitor how the changes are affecting the torque curve.

What you did was get a mail-order tune. One that was made for another car and then used on yours. There are differences between cars, especially with different mods. Whatever fueling adjustments or spark adjustments made for the other vehicle may not be right where the perfect spot is for your car. Sure it may be closer, but it's still going to be off. Regardless, it's going to be a very mild tune due to that fact.

[billytheman1188]

C2;609745']I assume by you saying "tune your car on the computer" you mean me adjusting values while doing street tuning. That's right; you need a dyno to efficiently tune and maximize power gains safely.

What you did was get a mail-order tune. One that was made for another car and then used on yours. There are differences between cars, especially with different mods. Whatever fueling adjustments or spark adjustments made for the other vehicle may not be right where the perfect spot is for your car. Sure it may be closer, but it's still going to be off. Tuning a vehicle is more than just copying some numbers and hoping for the best.

You assumed correctly....so when you gonna take your car to the dyno? Never heard you mention one before and your all about getting your car to run perfect....so take it to a dyno since you cant tune it 100%

Also, i'm pretty suuuuure Mike has done a few 3400's with an intake, headers and exhaust before....not that many mods and he quite a few cars with 3400's in them at the shop when i went. My car runs a hell of a lot better than before so i can't complain....better fuel mileage than before too. Soooo i think he did a pretty good job. I'm not taking my car to the strip all the time so i could give a damn about PRECISE tuning:lol: You think he just swapped numbers over from a different engine?:No:

[[ion] C2]

....so when you gonna take your car to the dyno? Never heard you mention one before and your all about getting your car to run perfect....so take it to a dyno since you cant tune it 100%
Because I make enough power as it is. Depending on the results of the spring time track visit I make, I'll get it tuned professionally.

Also, i'm pretty suuuuure Mike has done a few 3400's with an intake, headers and exhaust before....not that many mods and he quite a few cars with 3400's in them at the shop when i went. My car runs a hell of a lot better than before so i can't complain....better fuel mileage than before too. Soooo i think he did a pretty good job. I'm not taking my car to the strip all the time so i could give a damn about PRECISE tuning:lol: You think he just swapped numbers over from a different engine?:No:
Like I said, every car is different.