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Discussion Starter #1
So...as the title says...I have a trifecta tune and Solo highflow cat. Lately I've had a wierd issue with a kind of "hesitation" at WOT above 5000rpms. The car would pull hard then get to a point above 5000 and stop pulling then start pulling hard again etc.

It's very weird no codes not missing logged etc.

Well the other day I get a p0107 MAP sensor error code. My DIC doesn't show boost, but I feel it pulling hard. I decided to hook my Torque pro up to monitor KR and Boost etc., and sure enough I was getting between 23 psi to 26 psi and the car was pulling very hard all the way through to redline! Before the MAP sensor error I was getting between 21psi to 23psi and I would get that slight hesitation issue above 5000rpms.

In addition, I checked the KR information and I was also getting much less KR as well!!!!

I'm just wondering if anyone has an explaination for this, or if anyone else has had a p0107 and noticed much better performance?
 

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What happens if you reset the MIL? Do you have any other faults?

The sensor is clearly working, or you would not be able to read the manifold pressure, so it is likely an intermittent problem.
 

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What MAP sensor are you using out of curiosity?

Because the torque app is reading boost level from your ECM. Stock MAP sensor is a 2.75 bar which is only good to 25-26 psi (rounded up). You may be out of the range of the MAP completely and not know it if there is a bigger issue. If you have 3 bar MAPs installed, and the tune is setup for them (which I would think it should be) then that boost reading is probably reliable.
 

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What happens if you reset the MIL? Do you have any other faults?

The sensor is clearly working, or you would not be able to read the manifold pressure, so it is likely an intermittent problem.
What about an intermittent connection issue? Like a wire broken inside the insulation or plug? A good long scan with a raw MAP Kpa reading would help determine that.
 

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What about an intermittent connection issue? Like a wire broken inside the insulation or plug? A good long scan with a raw MAP Kpa reading would help determine that.
Exactly what I was referring to. An intermittent broken connection or short, since either could pull the signal voltage to a low level. The same thing could cause the hesitation if it happened at the right time.
 

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Discussion Starter #6
I'm using the stock map sensor. The hesitation is consistently right above 5000 rpms. I almost don't want to reset it because it's pulling so hard lol. Apparently this p0107 happens a lot to people with a tune kappa or cobaltss. Everyone who has had it says that the dic won't show boost but that it's def pulling hard. It's just weird that this code causes it to run better...
 

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According to the manual, setting the fault doesn't do anything, it just informs you that the sensor voltage was less than 0.19V for 4 seconds continuous or 50 seconds cumulative.
 

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Sorry...just read it wrong, was trying to watch TV and read your original post....I got nothing....
 

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Discussion Starter #9
According to the manual, setting the fault doesn't do anything, it just informs you that the sensor voltage was less than 0.19V for 4 seconds continuous or 50 seconds cumulative.
I guess that's my question. Basically why am I not getting the hesitation and why is my car pulling harder now that the code was thrown...thats what I'm not understanding.
 

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Do you have a means of reading the freeze frame data? That should give you some insight into what is going on.

As I read the documentation, the fault you are seeing requires two consecutive drive cycles to set the DTC and turn on the MIL, and three consecutive drive cycles without the fault will automatically reset the DTC and turn off the MIL.

Do you run WOT every time you drive the car? If the problem only occurs then, you may have been cycling between a pending code and no code, but finally the odds, and your heavy foot, caught up with you. It would be interesting to see what 3-4 drive cycles without WOT does. It would also be interesting to see what resetting does.

The manual is usually pretty good about describing all of the actions taken when a fault occurs, but nothing is perfect. It also can't take into consideration what gets changed with a tune. If this is a tune-specific condition you need to be talking to the tuner to find out what they do to affect it. Re-writing data tables can have unintended consequences, and this just may be one of them.
 

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Do you have a means of reading the freeze frame data? That should give you some insight into what is going on.
This is why I mentioned scanning and getting raw MAP KPa information. John is spot on...you need to do a scan looking at a lot of different information to get a better picture of what is going on when the problem occurs.
 

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I don't know if Torque will read freeze-frame data. I looked at a couple of OBD2 app reviews and none of them said that it would. If it will it should be in the diagnostics section.

Freeze-frame is nice because it captures a single moment of data when the fault is triggered, so it saves sorting through a lot of scanned data. On the other hand it doesn't tell you what led up to the fault, so scanning is valuable too. Both together is amazing.
 

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Discussion Starter #14
Well...I did upgrade to the Trifecta Custom Tune and did a datalog BEFORE the code was thrown, but the hesitation was occuring then as well. Maybe they will be able to see something and let me know....
 

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Well...I did upgrade to the Trifecta Custom Tune and did a datalog BEFORE the code was thrown, but the hesitation was occuring then as well. Maybe they will be able to see something and let me know....
Was it occurring before the tune, then you put the tune on, and it continued to happen?
 

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Discussion Starter #16
I think it may have been doing this before the tune, but I thought it was something else.

Trifecta reviewed my datalogs and said it was peculiar because the computer would change advance from 12 degrees down to 6 degrees back up to 12 degrees after 5000rpms but they didn't know why it was doing that.

I then told them about the MAP sensor now throwing the p0107 and the hesitation being gone and they shot back that the MAP sensor had to be causing the issue because with the code being thrown it puts the ECU back into another mode of working, and since there is no hesistation it had to be the MAP sensor. They then wrote a code for me to use the 3 bar sensors.

I told them that I have a new stock MAP I want to put in to see if the problem goes away first before spending a lot more money on somehting that may not fix the problem.

I also asked them if they were saying that even though the MAP sensor wasn't throwing a code for the last three years....If they think that being on the way out was causing the wierd jump from 12 degrees advance down to 6 then back up to 12.

I haven't heard back from them yet on that.

The other issue is that I just grenaded my rear differential at the track Saturday and don't know how long the car will be down since I don't know if I'll be able to find one etc...
 

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Hey Matt, thanks for the link to this thread. As you are aware, ive been dealing with this issue as well. Same set up mechanically And with the trifecta canned tune. Car pulls hard up to about 5000 RPM and falls flat and hard. Backfire and total loss of power. You can let up on the accelerator and get right back on it, but the hiccup will happen again. Been through a ton of recommendations, all good, but no resolution. Bad gas, MAF, plugs, gaps, leaks.

if this is the fix, not liking the need to upgrade the tune and 3 Bar Maps.
 

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Are the MAPS soldered? Or plug n play?
 

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08 Redline. RPM"s CAI, charge pipes, CAT delete & ECM Tune. diy tunnel brace. ProBeam.
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I had a couple hiccups when running with the Trifecta budget tune. Never any issues with it turned off, only when it was active (cruise control off).
I put on the standard intake and CAI upgrades, CATless DP, wiped off the trifecta tune and then had RPM Motorsports tune it. No more codes, dash lights, flashing CELs, or power drops. Just lots of fun.

Could it be Trifecta tune since that seems be a common denominator?
 
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