Ultimate Chip install issues - underboost

[viperman5]

After installing the Ultimate chip, the truck would lag more and underboost to 10psi in 1st gear then creep up in 2nd and 3rd gear to whatever I had the chip set at. Based on the chip instructions, it said to adjust the wastegate.

I adjusted the wastegate about 3 turns and nothing happened. Using the search function and reading other people’s issues, I thought I might have a bad catalytic converter clogging up the exhaust. To test this, I removed the vacuum line from the wastegate solenoid and had NO problems making 20psi boost with very little throttle. I am guessing my catalytic converter is not bad. Am I wrong?

I then put about 6 or 7 turns in the wastegate and now 1st gear holds 14psi and 2nd and 3rd gear creep 1-3psi past the setting on the chip.

Before installing the chip I have changed the vacuum lines around the wastegate solenoid.

What should be my next steps? I appreciate any help.

 

[PPI Typhoon]

Re: Ultimate Chip install issues - underboost

After installing the Ultimate chip, the truck would lag more and underboost to 10psi in 1st gear then creep up in 2nd and 3rd gear to whatever I had the chip set at. Based on the chip instructions, it said to adjust the wastegate.

I adjusted the wastegate about 3 turns and nothing happened. Using the search function and reading other people’s issues, I thought I might have a bad catalytic converter clogging up the exhaust. To test this, I removed the vacuum line from the wastegate solenoid and had NO problems making 20psi boost with very little throttle. I am guessing my catalytic converter is not bad. Am I wrong?

I then put about 6 or 7 turns in the wastegate and now 1st gear holds 14psi and 2nd and 3rd gear creep 1-3psi past the setting on the chip.

Before installing the chip I have changed the vacuum lines around the wastegate solenoid.

What should be my next steps? I appreciate any help.

Might be a dumb question, but you did change out your MAP sensor to the 3-bar, right??

 

[viperman5]

Yes, I have a 3 bar MAP sensor.

Under normal driving conditions, the truck runs good. I do get a trouble code 45 (O2/rich exhaust) at idle. I have changed the O2 sensor which didn't remove the trouble code. I thought once I get the truck dialed in better I would mess around with very small adjustments on the fuel pressure to see if maybe it might be a little rich at idle.

 

[SeattleSy#1255]

If you get this figured out....PLEASE let me know...i have been having this same problem for a long time....i can only build 4psi at launch and my boost is everwhere. i too have adjusted everything that I can think of from FP to WG, also checking Cat as well, seems to be fine...

I have come to this conclustion...the stock WG is near useless and has little ability to control anything, perhaps preventing some overboosting, but on some trucks it can't even do that....

my next upgrade with be a different WG and it seems the minigate from what I have heard can give a truck rock solid boost, however you have to be careful with that as well in adjusting it from what I have heard as the ECM I think is out of the loop of boost control with the mini...can't say for sure as I haven't installed on yet!

Please PM me if you get this fixed and what you have tried.

 

[MRKING]

maybe I can help

maybe I can help

If you go with the minigate you have to use a boost controller , unless you just go off the side vaccuum hook up, it will not go over I think 12 psi .

 

[SeattleSy#1255]

Re: maybe I can help

Re: maybe I can help

If you go with the minigate you have to use a boost controller , unless you just go off the side vaccuum hook up, it will not go over I think 12 psi .

yup, but its a much better WG and removes the ECM from the boost control loop.

 

[SeattleSy#1255]

Sounds like to me you have a sticky WG rod which is common like I said before...I also don't think the ultimate offers the best boost control either. If you have the money, go External gate with some sort of boost controller as menteiond above by mrking....it'll solve all the boost issues and you still have a great chip. Its just the stock setup is below par on most trucks, no matter how much you adjust and readjust...as mentioned, that is my experience. Its fooled me so much i thought my TC was bad, i thought perhaps my seloid was toast, clogged cat, and on and on....

did i mentioned the WG sucks LOL!

 

[Maverick87]

do you have any dm logs ? If you are setting a code 45 rich o2 it wont build boost right. Do you have an afpr? If so did you set the fp to 50psi with the vac line off?

 

[dgoodhue]

I have had some of the under boost issue as well. The last time I had my truck on road, I had a spring on the wastegate and 3.5 turns. That combo produce great boost in 1 and 2nd gear, I thought I was all set. However at the track it overboosted in 3rd by about 3 psi and it also over boosted on some downshifts, so that is obviously no good.

I have some idea, but I have gotten around implementing them yet as my truck isn't on the road yet, but will be on Thursday I have a spring on my wastegate, I am going to try tune to raise my base boost around 13psi. I am probably going to fool around with the wastegate rod (I am going to try the stock setting) and play with chip table in Romulator to be able to get full boost and some control.

 

[viperman5]

Yes, I have an afpr and it is set to 50psi. I don't have dm logs. I am going to purchase the software and cable today.

If I were to go with an external wastergate and boost controller, what should I be looking at? I haven't really seen anything from the SyTy shops that offer any wastegates without going to the PTE or ATR downpipes and wastegate. I would be interested in getting some type of setup that in the future I could upgrade the turbo.

Also, if I go to an external wastegate then I use the Ultimate gauge for timing adjustments and the boost controller to set boost levels, correct?

 

[SeattleSy#1255]

http://www.raceprovenmotors.com/car...id=84&osCsid=1ab7a5ed6b0f9feea1b4e69dfca51f2b

Mike has a some and a lot of guys are using this one...its a mini, but its good enough if you upgrade the turbo to the common kits....depending on how radical you plan to go...i'm assuming you are stock, want better boost control, and perhaps in the future a turbo uprade with stock motor....if so, this should be good and will work later as well.


http://www.raceprovenmotors.com/cart/product_info.php?cPath=27_109&products_id=88

Ask about controllers, but mike seems to think this would be fine.

or

http://www.raceprovenmotors.com/cart/index.php?cPath=27_109