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Thread: Results of my last tune session
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11-30-2015, 08:31 AM #1
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Results of my last tune session
Ok, So been holding off on this post because I wanted to run a compression test that my tuner requested I do after this last attempt to get it tuned.
Ran the compression test yesterday and here are the results:
Cly # Open/Close Throttle
1- 195/200
3- 200/210
5- 200/190
7- 190/190
2- 190/190
4- 185/185
6- 190/190
8- 180/180
On this side I can't say for 100% certain that the gauge was fully seated, It was a MOFO Bitch to get the adapter on.
I don't see anything that looks concerning but hey I could be wrong
So here's the issues. He has tried every trick he knows to get it to idle correctly. Every time you step on the gas there is a miss/hesitation then it roars up like nothing wrong. WOT he has no issues, only at idle and initial climb in rpms. It is also fowling the plugs out fast, like the new set we dropped in fowled out in 2-3 hrs of trying to tune it. He found a couple of issues that could have caused this but at this point it's a guess. Those were: The fuel firing data table was adjusted (He reset it to correct table) and all O2's off (I know & he explained that the last tuner might have done this because of the previous injector issues that were replaced for this session). Both have been reset.
Here's what he wants me to do:
1- Compression Test - DONE & report back to him. Besides the serious checks here he said he's looking for signs that the valves might be slightly open due to the push rods being a hair too long.
2- Injectors - Opt A - Test, clean & rebuild them to make sure they are in fact running correctly (Est Cost $225) OR OPT B - He'll give me a couple of recommendations on injectors to purchase for my build (Est Cost $400-500).
3- OPTION A -Borrow a stock size SLP Airlid and bring my stock MAF. He want's to use the MAF as a gauge to measure the airflow going into the motor. He has software that will input it into some tables that will let him build a SD tune. We'll have to drive it around and put it through different conditions but once it's all done I drop the MAF and run it SD.
OPTION B - Get a 99< wire harness & ECM, doing SD tunes are easier to do then on a 97-98 ECM. Something about they rely heavy on MAF sensor. This option is much more expensive because it will also mean a 99< dash cluster which I'm not a fan of.
4- Relocate the MAP Sensor to the front of my FAST Intake. We found it broke on the day of tuning and made a quick fix. After the New Year I'll have this done.
5- Button up the exhaust - Already planning on it
6- Install a WideBand A/F gauge is optional but not needed, he said to get it if I really wanted one. (Already planned on getting one)
The last 3 are not a issue for me, it's the first 3. Any suggestions/input?
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11-30-2015, 09:05 AM #2
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11-30-2015, 10:12 AM #3
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Can't fault him, he's very good and has been around for quite a long time.
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11-30-2015, 10:24 AM #4
Copy and paste all of that into a post on Southwest Trans Am. I'd be interested to hear what a few of them would say.
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11-30-2015, 11:22 AM #5
Interesting... curious to know what the issue is. Certainly sounds like a fueling issue. Do you have a gauge on your fuel pressure?
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11-30-2015, 11:28 AM #6
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Yes, reads 57psi, new Racetronix pump, fuel filter and Bosh 13111's O2 senors too.
Also forgot to add in 1st post.
The plugs I swapped out on the day of tuning were black as hell. Like super rich in fuel. The plugs he swapped in after I left the car with him I checked as I pulled them out for the compression check were not nearly as bad. Still look likes it running a little rich but they weren't black as coal. I should also add it does move under it's own power and runs just idles like crap.http://www.ls1.com/forums/f7/my-6-liter-build-174257/
http://www.ls1.com/forums/f8/my-8-8-rear-build-165553/
6.0L Block - Forged 403ci , Polluter Stg3 Cam, FAST 102mm Intake, NW102 TB, MSD wires, NGK TR6 plugs, Truck Coil Packs, LS3 Fuel Injectors, CC Pacesetter LT Headers, TS&P ORY, QTP e-Cutout, Magnaflow Muffler, 104mm Air Lid & Line Lock, Catch Can, Stage 2 T56 w/Viper shaft, PRO 5.0 Shifter, Tick MC, SPEC Stg3+ Clutch, QT SFI BH, MWC DSL, Full UMI Performance Suspension, Belstein Shocks, Hotchkis Springs (1" Drop), YR1 Snowflake Wheels wrapped in NT555 tires & Custom Fab Ford 8.8 rear w/Wavetrac Diff 3.73 Yukon Gears, WSQ Hood, 3"CM Strange Eng Drive Shaft.
00 FB Vert - Stock
78 FB - Just getting started......
Horsepower never lies, but is often lied about!
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11-30-2015, 06:53 PM #7
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12-01-2015, 05:14 AM #8
What spark plugs are you using?
Boost gets you laid, unless your name is Jon.
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12-01-2015, 06:19 AM #9
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
NGK TR6's and it also has New MSD Super Conductor plug wires.
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12-02-2015, 05:32 PM #10
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Phantom Black Metallic- 2004 GTO M6
That's what I'm wondering too. For the past few months, mine has been shutting off right after startup on and off. Start it up again, and starts and idles just fine. Pulled my IAC and it was pretty dirty. Cleaned it off and it still stalls after startup, but not as much. Might replace mine soon.
extreme dimensions, driveshaft shop, harrop, hid(35watt/6k) lows, hurst, k&n, led fogs, maverick man, mishimoto, nitto, revshift, slp, stern st-1, smoked sidemarkers, whiteline poly radius rod bushings
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12-03-2015, 06:12 AM #11
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12-03-2015, 06:39 AM #12
Yes. Codes P505 to P509 indicate a fault with the idle speed control system.
The diagnostic procedure involves disconnecting ISC motor, then starting the engine to see if the idle speed increases (it should). Turn the engine off, reconnect IAC and start the engine again. This time the idle speed should return to normal. If it does, the problem is not in the IAC circuit or motor.
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12-03-2015, 08:54 AM #13
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Phantom Black Metallic- 2004 GTO M6
Results of my last tune session
I disconnected mine and the car would die as soon as I fired it up.
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