Knock Retard....Fuel Starvation....Torque Management ??? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-06-2004, 11:29 PM   #1
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Default Knock Retard....Fuel Starvation....Torque Management ???

I really need a scan tool bad Not having a laptop sucks too.

Car is doing something similar to when I first installed the smaller SC pulley.

Acceleration is strong but if I accelerate from a dead stop....even without any wheelspin...and hold it at full throttle, after about 13 secs. when it gets to almost exactly 90 mph it stops accelerating and feels like I lifted the throttle to half even though it'* still matted, then accelerates very slowly. Knock retard can't be that dramatic, can it?
If I start full throttle acceleration from a higher speed, it doesn't happen.
Sort of kills my 0-100 or 1/4 mi runs. .....even with a cool engine and outside temps.

Like I said, it did that when I first installed the pulley a couple of years ago but went away after a short while.
Is this a PCM learning thing.....or maybe associated with the new DPH computer
The higher fuel pressures or the AFC 1.1 didn't help.
Any ideas
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Old 04-06-2004, 11:36 PM   #2
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SCAN TOOL!!!

Get on ebay, buy a cheap 100mhz laptop. The buy an autotap. All your problems are solved. Then it would be quite easy to see what the problem is.

Shawn
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Old 04-07-2004, 12:21 AM   #3
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I took your advice and just bought a cheap laptop off EBay.

Auto Tap is next......
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Old 04-07-2004, 12:52 AM   #4
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Quote:
Originally Posted by 2000SilverBullet
I took your advice and just bought a cheap laptop off EBay.

Auto Tap is next......
Good one SilverBullet

I have a Dell 600 lap top I got from ebay that I'm going to use when the Digimoto shows up
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Old 04-07-2004, 12:59 AM   #5
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dude you got a computer glitch. I bet your at about 6000 rpm when this happens right? That is a known problem.
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Old 04-07-2004, 01:10 AM   #6
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Quote:
I have a Dell 600 lap top I got from ebay that I'm going to use when the Digimoto shows up
Digimoto? Tell me more about that one. How does it compare to the AutoTap?
Cost? Link?
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Old 04-07-2004, 01:13 AM   #7
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Quote:
dude you got a computer glitch. I bet your at about 6000 rpm when this happens right? That is a known problem.
It'* about 5300 rpm in 2nd gear.
Tell me more about this "known problem".
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Old 04-07-2004, 01:32 AM   #8
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I don't think a 100mhz laptop will be useful, remember, you'll want excell and autotap running at the same time, minimum. A decent network connection would be nice too. A great new laptop can be had for $1000, with a fast processor, wireless and the whole kit and caboodle.
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Old 04-07-2004, 02:46 AM   #9
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Quote:
Originally Posted by BonneMeMN
I don't think a 100mhz laptop will be useful, remember, you'll want excell and autotap running at the same time, minimum. A decent network connection would be nice too. A great new laptop can be had for $1000, with a fast processor, wireless and the whole kit and caboodle.
Why would you need more than 100mhz??? If it has a decent amount of ram (32mb or more) it would be fine. We use a 166mhz laptop w/64mb ram for autotap logs, and don't have any program except for autotap open during the logging. It is plenty quick and has no trouble. We used to use a 120mhz laptop with 16mb of ram, and that worked fine too, it just took a long time to boot up. Once you get the laptop up and running you don't need much. IIRC the autotap program requres a 66mhz or faster processor with 8mb ram or something like that. It is a very simple program, doesn't take much to run it.

Why would you want excell running???

Shawn
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Old 04-07-2004, 03:42 AM   #10
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Digimoto is an inexpensive program and obd2 attachment that I got for $89 us.
The software looks promising and does everything auto tap does.
I hope to get it soon as it shipped 9 days ago.

www.digimoto.com
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