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Performance Tuning Beginner and advanced tuning | Tools of the trade |
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10-19-2013, 02:59 PM
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#61
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Senior Member
Join Date: Mar 2007
Location: On the road
Posts: 2,133
Name :
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I would think that a vehicle speed sensor would have something to do with this also.
On a side note, it's really kind of funny. I used to think some carburetors were complicated(especially when I took the top off my first Quadrajet and springs and ball bearing flew out). And when fuel injection came along in 1985 It was intimidating because we knew so little about it and we couldn't adjust it. But it has proven so reliable that we seldom give it a second thought. At least until I get behind a 1970 Chevelle at a red light and you have to turn your A/C to max air because you're choking on the fumes from a rich carb condition! Probably not too many that can/will work on a carb motor these days. Or setting the points on the ignition. My, haven't we come a long way!?
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I Have Noticed That A Lot Of People Demanding Free Stuff Are Not Wearing Work Boots.
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10-19-2013, 09:25 PM
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#62
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Internet Sanitation Engineer
Join Date: Mar 2006
Location: Crawfordville, FL
Posts: 15,139
Name : Rich Zuchowski
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Took the car out for a shake down cruise to Mexico Beach with some of the local Crawfordville crowd. Round trip was just under 200 miles, and the car ran really well the entire trip. So this is the longest trip made yet with the car, and it passed with flying colors.
Oh yeah, it was even driven through heavy rain and didn't melt on me, so that's a good sign....
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10-20-2013, 06:07 PM
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#63
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!ereH nI depparT m'I pleH
Join Date: Jan 2007
Location: 25 miles south of Boston, MA. Also have a house in Dunedin FL.
Posts: 1,927
Name : Andy Anderson
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Got a name for it yet????
bluEvil ????
Andy
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10-20-2013, 09:03 PM
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#64
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Internet Sanitation Engineer
Join Date: Mar 2006
Location: Crawfordville, FL
Posts: 15,139
Name : Rich Zuchowski
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Quote:
Originally Posted by navy2kcoupe
Got a name for it yet????
bluEvil ????
Andy
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I really can't think of one word that would sum up the last four years. NGHTMRE, maybe..... I think there is a limit of 7 characters on a license plate.
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10-20-2013, 09:54 PM
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#65
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Senior Member
Join Date: Mar 2007
Location: On the road
Posts: 2,133
Name :
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It's OK Rich, it was just a "BADREAM"!
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I Have Noticed That A Lot Of People Demanding Free Stuff Are Not Wearing Work Boots.
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10-20-2013, 11:58 PM
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#66
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Internet Sanitation Engineer
Join Date: Mar 2006
Location: Crawfordville, FL
Posts: 15,139
Name : Rich Zuchowski
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Quote:
Originally Posted by 85vette
It's OK Rich, it was just a "BADREAM"!
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Yeah, I certainly was REAMED BADly by some people......
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11-21-2013, 03:54 PM
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#67
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Internet Sanitation Engineer
Join Date: Mar 2006
Location: Crawfordville, FL
Posts: 15,139
Name : Rich Zuchowski
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I took the car out for a drive today as a sort of final test drive. The changes I made concerning the idle problem I had appear to have done the trick. Idle remains stable around 900 rpm +/- 10% no matter what. Throttle response is excellent. Gas mileage is VERY good, sometimes hovering at 30 to 31 mpg while cruising. The log file traces look very good with no strange humps or valleys anywhere. I didn't run it up into boost, though, and I don't think it is necessary. The tuning changes I made since the last time I did that shouldn't have affected anything with the fuel mixture or timing, and it looked fine to me then.
There was another problem I had a while back with the DIC giving me a Reduced Engine Power message on engine startup every now and again that I believe I have fixed. It appears I was affecting how much vacuum was in the manifold by how I was playing around with the tables that control engine starting. From what I can figure, if then engine starts up too "weakly", there isn't much vacuum in the manifold and by association, the brake booster, when the PCM runs diagnostics on the brake system. So I think the PCM determines this is a fault in the brake system which is exhibited as a fault in the ABS and traction control systems. So the PCM basically shuts down the engine with a REP fault. At least that appears to be the case by the changes I made to the startup tables. Time will tell, I guess.
Anyway, unless something else shows up, I'm stamping the tuning chapter as being DONE. I'll be pulling out the wideband sensor stuff and consider the car as finally FINISHED.
BTW, the car drives REALLY well. Real tame coming off of a dead stop and even nearly all of the low speed surging is gone. There is still some, but I think it is just the nature of the beast. Heck, even my C6 Z06 does that time to time, and from what I can recall, so did the stock LS6 I originally had in my C5Z. I think it is just amplified by the suspension mods in my car, plus the Pfadt polyurethane motor mounts taking out all the drivetrain slop that rubber grommets and bushings cover up.
So, as best I can tell, FINALLY done.
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Last edited by Rich Z; 11-22-2013 at 02:32 AM.
Reason: Scrambled some word usage..
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11-21-2013, 06:59 PM
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#68
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!ereH nI depparT m'I pleH
Join Date: Jan 2007
Location: 25 miles south of Boston, MA. Also have a house in Dunedin FL.
Posts: 1,927
Name : Andy Anderson
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YEE-FREAKIN-HAW !!!!
Andy
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11-21-2013, 08:11 PM
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#69
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Senior Member
Join Date: Nov 2006
Location: Auburndale, FL
Posts: 2,391
Name :
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Rich I think you'd put the "pros" to shame with what you have learned of their business in the last three years. BTW I am discarding the bad memories of some of the azzholes who claimed to be experts and cost you a damn fortune for just muckng up the build.
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Quietly, quietly, quietly making noise.
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11-21-2013, 08:18 PM
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#70
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!ereH nI depparT m'I pleH
Join Date: Jan 2007
Location: 25 miles south of Boston, MA. Also have a house in Dunedin FL.
Posts: 1,927
Name : Andy Anderson
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I think that the BIG plus in all of this "crap" has been Rich's ability to learn
more about the inner workings of his Vette in 2 + years than the rest of us
probably ever will know. It's GOTTA be a good feeling to feel some surging
and say to yourself........"I know what that is, and how to fix it"! Me......
all I can say is "WOW some surging............better get this bad puppy to Rich
REAL QUICK!" I compliment you on your perseverance, and attention
to detail, Rich!
Andy
By the way, and NOT to hijack the thread, but how's the Tiger Shark
front end coming along.......?
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