[repmud]

So here is the deal:
Installed 20g, larger TMIC, Meth, Fuel pump, perring moded injectors and had a pro tune at XX in the winter.
Everything was fine at this point. I then installed EGT, Boost, and Oil temp gages. Immediately afterwards the car started hesitating under vacuum, totally fine under boost. The problem is most noticeable in 6th while ~2-3K RPM's, however if I concentrate I can make it happen in all gears. I have since removed the EGT probe and installed a plug, capped the vacuum line to the boost gage, in an effort to locate either an exhaust leak of vacuum leak. Both with no success of finding anything. My last thought is to spray propane gas in and around the TMIC area to check for a vacuum leak to see if I knocked something loose while re-installing it or installing the oil temp gage. If you guys have a better method please suggest something, my boss at work recomended this and I am not crazy about it. He said the engine idle should go up if the car sucks in propane.

Another problem I have had prior to installing all the gages is that when the weather started getting nicer, and hotter, I would have issues restarting after driving for ~1hr or more. The car turns over and seems to be getting flooded with fuel, I can smell it and when I hit the gas it will burn it up and smooth out. This would occur within 30minutes of shut down time, anything more and it seems to cool off enough to start fine.

So I think I either have a vacuum leak, because I ruled out exhaust leak by extensively and painfully checking where I installed the EGT probe, or a tuning issue for hotter weather.

If I don't find any vacuum leaks what parameters should I log to see my problem? I just bought enginuity.

I just noticed something on the way home from work, it seems the longer I drive the car, time/mileage wise, it seems to get worse and more noticeable in every gear. A long shot here, but could it be the trans/clutch? How do I test for that?

I have been chasing tail on this for a few thousand miles any help would be greatly appreciated.

[repmud]

No leaks, used propane then made a pressure tester and pumper her up. no leaks anywhere. WTF? Anyway, going to see if driving with a/c off makes the problem go away, maybe since my tune was done in the winter the tuner forgot to load something for a/c. I don't know, I know nohing about tunning a car. Got my autoenginuity today and I hope to log some data on the way to work tomorrow.

going to start with MAP, O2 sensors, TPS, ETS, not sure what else to look at

[Loubaru]

Look on the Romraider website in the FAQ section for recommended logging parameters... post those logs here (or on the romraider site) and hopefully someone will be able to help you. I don't know enough about these cars to try to diagnose your problem, you have already done everything I would have.

[bluedemon_II]

You cool have spool up knock if it only happens under vacuum or under spool up conditions. You could have knock in some other places. The tuner could have gone a bit hard on the timing or A/f under low load and you could have that.

You need to log Fine knock learning correction
Knock advance timing
Ignition advance timing
Ignition total timing
Engine load and rpm

those parameters will tell you if you are knocking under any condition. Don't know if the autoeng. software has the same names but at least the romradier logger has them by those names.

[repmud]

Originally Posted by bluedemon_II

You cool have spool up knock if it only happens under vacuum or under spool up conditions. You could have knock in some other places. The tuner could have gone a bit hard on the timing or A/f under low load and you could have that.

You need to log Fine knock learning correction
Knock advance timing
Ignition advance timing
Ignition total timing
Engine load and rpm

those parameters will tell you if you are knocking under any condition. Don't know if the autoeng. software has the same names but at least the romradier logger has them by those names.

Thanks, I will look into that today. I went with autoenginuity because I do not want the ability to write to my ECU, I am paranoid about screwing it up.

Also, could be a coincidence but I didn't notice it this morning with the a/c off. Anyway, when I get data I'll be back.

[repmud]

Originally Posted by Loubaru

Look on the Romraider website in the FAQ section for recommended logging parameters... post those logs here (or on the romraider site) and hopefully someone will be able to help you. I don't know enough about these cars to try to diagnose your problem, you have already done everything I would have.

Thanks, will do.

[gabedude]

Originally Posted by bluedemon_II

You cool have spool up knock if it only happens under vacuum or under spool up conditions. You could have knock in some other places. The tuner could have gone a bit hard on the timing or A/f under low load and you could have that.

You need to log Fine knock learning correction
Knock advance timing
Ignition advance timing
Ignition total timing
Engine load and rpm

those parameters will tell you if you are knocking under any condition. Don't know if the autoeng. software has the same names but at least the romradier logger has them by those names.

Log the following for a complete picture (without giving away too much of what is in the tune):

Feedback Knock Correction
Fine Learning Knock Correction
IAM
Throttle opening angle
Throttle pedal angle
AFR #1
AFL #1
AFC #1
C/L O/L status
MAF G/S
Engine Load
Engine Speed (RPM)
MRP (Manifold Relative Pressure)

[repmud]

For those curios, AutoEnginuity does not do what I need. I ended up downloading Romraider and Ecuexplorer and thought Romraider was easier. It looks like I can use my AP V1 cable to log data, although there are conflicting posts. Anyway, I hope to have data soon. Thanks guys.

[repmud]

Originally Posted by bluedemon_II

You cool have spool up knock if it only happens under vacuum or under spool up conditions. You could have knock in some other places. The tuner could have gone a bit hard on the timing or A/f under low load and you could have that.

You need to log Fine knock learning correction
Knock advance timing
Ignition advance timing
Ignition total timing
Engine load and rpm

those parameters will tell you if you are knocking under any condition. Don't know if the autoeng. software has the same names but at least the romradier logger has them by those names.

Originally Posted by gabedude

Log the following for a complete picture (without giving away too much of what is in the tune):

Feedback Knock Correction
Fine Learning Knock Correction
IAM
Throttle opening angle
Throttle pedal angle
AFR #1
AFL #1
AFC #1
C/L O/L status
MAF G/S
Engine Load
Engine Speed (RPM)
MRP (Manifold Relative Pressure)

Guys, there are a few parameters you listed I can not find in the romraider table.

Fine Knock Learning Correction
Knock Advanced Timing
Ignition Advanced Timing
Feedback Knock Correction
Fine Learning Knock Corection
Ignition Advanced Multiplier
C/L O/L Status

I am in the Romraider logger, under parameters. The only thing I see for knock is knock correction advanced. I would assume I have the same software you both have but I don't see these. I have version 0.5.0 beta.

[Merchgod]

you have to actually be connected to the ECU to select those parameters since they are ECU specific.

[repmud]

Originally Posted by Merchgod

you have to actually be connected to the ECU to select those parameters since they are ECU specific.

thanks

[repmud]

Originally Posted by bluedemon_II

You cool have spool up knock if it only happens under vacuum or under spool up conditions. You could have knock in some other places. The tuner could have gone a bit hard on the timing or A/f under low load and you could have that.

You need to log Fine knock learning correction
Knock advance timing
Ignition advance timing
Ignition total timing
Engine load and rpm

those parameters will tell you if you are knocking under any condition. Don't know if the autoeng. software has the same names but at least the romradier logger has them by those names.

Originally Posted by gabedude

Log the following for a complete picture (without giving away too much of what is in the tune):

Feedback Knock Correction
Fine Learning Knock Correction
IAM
Throttle opening angle
Throttle pedal angle
AFR #1
AFL #1
AFC #1
C/L O/L status
MAF G/S
Engine Load
Engine Speed (RPM)
MRP (Manifold Relative Pressure)

I have some data logged and from some one who doesn't know what they are looking at it appears that I have fine learning knock correction in the range I am feeling the car hesitate.

[bluedemon_II]

How many degrees are you pulling, anything more than 1 is bad and even so you shouldn't have fine knock learning correction. If I'm not mistaken that means that knock has happen in that area too often and the ecu learned to pull timing there. Have your tuner take a look at it.

[repmud]

Originally Posted by bluedemon_II

How many degrees are you pulling, anything more than 1 is bad and even so you shouldn't have fine knock learning correction. If I'm not mistaken that means that knock has happen in that area too often and the ecu learned to pull timing there. Have your tuner take a look at it.

The min I am seeing is -3.5 LKC. Does it matter that I do not hear anything, could it be false knock? Unfortunately the guy who tuned my car is 2.5+ hours north of me. I am trying to find out when a local guy has gottem the latest from Cobb. He is only 0.5 hours away. Am I in danger of breaking something? On another note I haven't seen the EGT gage go over 1550 deg F. Most of the time it is pegged at 1500, and it only goes to 1550 under high load in 6th.

[repmud]

anyone feel like looking at my excel sheet full of data? PM me and I will email it to you