I am very green at knowing whether or not something looks off, hoping one of the pros here can take a peek at these two clickable videos just to see if anything stands out that may not be correct.....thanks in advance!

P.S. Just installed a Holley 52mm....wanted to explain the high idle LOL

Idle





Idle and some throttle

 

Seems like the TPS is not adjusted correct or your throttle blade is open?

 

Hey Ray, thanks for the response, I did adjust it, i actually had JUST got done putting a second-hand Holley TB on it, and it has the problem of the throttle not snapping all the way back shut. Common prob on those, i need to take care of that. Base idle is around 850 and TPS is around .60~.63 at 0% throttle. Everthing else is looking somewhat normal ya think?

 

You title says IDLE, but in both traces the PCM is not in an idle condition..You are BLM cell 17 (Speed = 0 and TPS Not = 0 ) . Timing of 38* looks like it's using the main table settings not the TPS closed table. AFGS is high 11 AFGS. And IAC parked at 51 looks OK as you are not in idle . The trace looks normal for someone holding the throttle in a vehicle stopped condition. Looking at BLM's maybe a bit rich however BLM cell 17 does not really supply a lot of meaningful BLM data. But all of your readings look OK, Map looks like a stock cam at high 20's Kpa , AFGS looks good at 11 AFGS for 1250 RPM. O2's are switching within range.

 

Thanks for the good info Bob, I know the idle is high, and i know why. I see what you would be thinking with that affecting alot of other readings....i need to get those trottle blades to stop hanging up, then i can get a vid of ACTUAL idle conditions

P.S.

What exactly is AFGS? That one is getting past me

 

Check the throttle body install. Are you sure the throttle stop screw isn't holding the blades open?

Make sure the blades are closed against the stop. If idle remains above the target value (800 RPM from your data log = stock for an M6) back off on the throttle stop screw slowly, allowing the IAC counts to adjust, until the idle is at 800 RPM. At that point, check the IAC counts - should be in the range of 20-40 counts. If not, adjust the stop screw slowly until the counts are within range. Once you have the correct RPM and correct IAC counts, check the TPS voltage. Should be in the range of 0.20 -0.90V, with some people feeling a value of 0.50V or 0.65V is preferred. Not sure why.

Read through this - might help you understand what you are looking at:

http://www.injuneer.com/ScanMast.html

In my opinion, a descreened MAF sensor is always a mistake, unless you have a totally symmetrical intake configuration.

 

Thanks for the info Fred My throttle blades are definitely NOT closing all the way, and it isn't returning to the stop. Before putting the TB on, I polished the bores like crazy to try to keep the blades from hanging up. It felt good, but when I put it on, it became apparent that it wasn't good enough I know you have posted pretty much endlessly about the inferior design on the Holleys, and when I had it off, I held it up to the light and saw it firsthand. What do you think would be the best method on clearancing the butterflies without risking taking too much off? Also, what adverse conditions do you think it would create if I tried this other thought I had? I was doing an inner debate, and was thinking of running the stop screw in just enough to miss the "sticky spot" and slotting the tps to adjust it back to normal values.....would that be a major mistake that would throw something else off? Thanks in advance!

 

You are saying that I have posted endlessly about the inferior design of the Holley??? Not sure where you got that. After two minor tweeks, I got mine to work fine. I never had the idle air problem that people seem to have with other brands.

The Holley has an adjustable return spring. Look at the side of the TB, and there are multiple holes that then end of the spring can go into to change the spring tension.

 

Ah, I guess "inferior design" was a bad way to put it..I was meaning the things you had posted about the butterflies not being machined to exact tolerances and how the throttle cam moving in relation to the throttle shaft. I did adjust the spring to the most tense (forward) position already as well.