i just installed Skunk2 Pro1's in my jdm gsr. Started up, idled fine after some screwing with it, but now when data logging my car is in column 5-6 at idle. Im just trying to get this thing drivable to get it tuned. What is the reason the load is so high and what can be done to semi-correct this?

 

My maps are in mBar, the idle is at just about 1000 as it is. Im thinking im not pulling enough vac or something

 

Larger cams can cause a motor to pull less vacuum.

Something doesn't sound right, make sure your timing belt is setup properly at tdc & check your air fuel ratios. It sounds like your idle is too rich...

 

The idle is pretty rich but i cant get it into the lower columns to pull out some fuel. Even whaile driving, partial throttle to no throttle, its never dropped below column 4

 

Try a different MAP sensor.

Does that ECU allow any kind of sensor calibration?

What's your elevation? Are you driving around the bottom of the ocean?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">Something doesn't sound right, make sure your timing belt is setup properly at tdc</TD></TR></TABLE>
I second that. Cam timing may be off, even Pro 1's usually pull more vacuum at idle than that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by baller status &raquo;</TD></TR><TR><TD CLASS="quote">Try a different MAP sensor.

Does that ECU allow any kind of sensor calibration?

What's your elevation? Are you driving around the bottom of the ocean?</TD></TR></TABLE>

The map sensor is more then likely not the issue. I have once seen an issue with a skunk2 throttle body on an hseries having trouble getting a good map signal.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ8chu &raquo;</TD></TR><TR><TD CLASS="quote">The idle is pretty rich but i cant get it into the lower columns to pull out some fuel. Even whaile driving, partial throttle to no throttle, its never dropped below column 4 </TD></TR></TABLE>

Yes you can get into the lower columns to pull out fuel...
You need to consult an experienced tuner or start doing some reading

Lean out the idle columns so they are not pig rich & your motor will start pulling more vacuum.

 

I just checked the timing and its spot on. I guess i need to pull about 40-45 points of fuel accross the low speed map. Im gonna try a new map sensor. The only issue i could think that would have caused a bad map sensor is when i had compressed air in one of the cylinders, i went to compress an intake valve spring, and the retainer basically didnt free itself and a valve opened blowing air in through the intake manifold for a few seconds.

 

Oh yeah, the car runs fine at WOT, a bit rich but it doesnt break up or hesitate or anyhintg like the part throttle does

 

did you degree the cams when you installed them? i had a car with pro series cams that had some issues....we degree'ed the cams and everything went back to normal....the cam timing was off a good amount, even though all of the timing marks lined up perfectly.


the pro series cams def. need to be tuned differently than your normal vtec cams in the idle department.

 

I had them set to what skunk2 reccomended as a "quick setting" instead of degreeing the cams. +3 intake and +4 exhaust

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">

The map sensor is more then likely not the issue. I have once seen an issue with a skunk2 throttle body on an hseries having trouble getting a good map signal.</TD></TR></TABLE>

I'm not sure what you mean. Are you saying that our MAP sensors are extremely reliable?

I just threw it out there as a knee jerk reaction because it's a quick/easy thing to check. Load signal is bad, MAP sensor. I have a handful laying around in my garage. But you're right on second thought because it sounds like he is having a problem with load PHYSICALLY, not the load SIGNAL.

 

My old Pro2+ setup used to idle in what would be columns 3-4 most of the time.

Strange. What intake manifold/TB/MAP sensor setup?

- Derek

 

Blox Intake mani, ITR throttle body and i've tried 2 stock map sensors with no luck. Ive got it idling in columns 3-4 most of the time and sometimes it jumps to 5. Part throttle is expletived as i would expect

 

Ah, gotcha'.

Sounds normal then.

PM is replied.

- Derek

 

do you have a wideband to be making changes?

 

what is your mbar or inhg reading? may require iacv duty cycle to be changed in order to have a lower idle.

 

Of course i have a wide band. And i do have a basic knowledge of tuning.

I have tried adjusting the IACV duty cycle and if anything the load goes up. Ive got it down to columns 3-4 just by tweaking at idle

 

what in/hg or mbar are we talking?

 

Its in Mbar.
column3 is: 417
4 is: 535
5 is: 650

Stays in 3-4 most of the time now

 

where in md are you?

 

Columbia area

 

Do you have the throttle body gasket turned backwards maybe? This will create a leak that will not increase rpm but will allow the map sensor to read less vacuum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spunkster &raquo;</TD></TR><TR><TD CLASS="quote">Do you have the throttle body gasket turned backwards maybe? This will create a leak that will not increase rpm but will allow the map sensor to read less vacuum.</TD></TR></TABLE>

I don't think the problem lies in the equipment.

As I stated before, on my old Pro2+ setup, my idle sat at around 430-450mBar, and the Pro1+'s are notorious for a rougher idle than the 2's, especially when not dialed-in.

Sounds like it just needs a tune.

- Derek