Goes Flat @ 4800
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Originally Posted by qwik-tripp
98% of the time my 92 6sp stops pulling at 4800-5000. This weekend I checked fuel pressure 39 w/vacuum and 49 when floored and stays steady while going through the gears, but it just stops pulling at 4800.
Every once in a while it will pull up to 5600 but mostly goes flat from 1st to 2nd or 2nd to 3rd. I removed the pcmforless chip and it was worse. I just installed a NX wet kit and cannot enjoy it until I cure this.
Every once in a while it will pull up to 5600 but mostly goes flat from 1st to 2nd or 2nd to 3rd. I removed the pcmforless chip and it was worse. I just installed a NX wet kit and cannot enjoy it until I cure this.
Racer
Joined: Jan 2004
Posts: 398
Likes: 0
From: Eastern Shore Maryland
Goes Flat @ 4800
98% of the time my 92 6sp stops pulling at 4800-5000. This weekend I checked fuel pressure 39 w/vacuum and 49 when floored and stays steady while going through the gears, but it just stops pulling at 4800.
Every once in a while it will pull up to 5600 but mostly goes flat from 1st to 2nd or 2nd to 3rd. I removed the pcmforless chip and it was worse. I just installed a NX wet kit and cannot enjoy it until I cure this.
Every once in a while it will pull up to 5600 but mostly goes flat from 1st to 2nd or 2nd to 3rd. I removed the pcmforless chip and it was worse. I just installed a NX wet kit and cannot enjoy it until I cure this.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Most popular method is to use a laptop computer and use software from either TTS Datamaster or Tuner Pro RT. They allow free downloads for a total use of 20 (If I remember) times. The software will allow you to record the events as the car is running and can also monitor activities. You will also need to purchase a diagnostic cable to interface the laptop with the cars ALDL (ECM). A source for this would ba Craig Moates (moates.net)
For me 20 record times wasn't/isn't enough, so I bought both software programs. The TTS is probably the most recognized with tuners and the cost was around 100. It will also allow you to see all operational data, egr. spark, codes etc. etc. IMO, pretty much a nessecity when getting involved with troubleshooting and modding one of these cars.
For me 20 record times wasn't/isn't enough, so I bought both software programs. The TTS is probably the most recognized with tuners and the cost was around 100. It will also allow you to see all operational data, egr. spark, codes etc. etc. IMO, pretty much a nessecity when getting involved with troubleshooting and modding one of these cars.
Last edited by mseven; Nov 27, 2006 at 10:46 AM.
Le Mans Master
Joined: Sep 2000
Posts: 6,303
Likes: 714
From: Bartlett IL
Originally Posted by qwik-tripp
98% of the time my 92 6sp stops pulling at 4800-5000. This weekend I checked fuel pressure 39 w/vacuum and 49 when floored and stays steady while going through the gears, but it just stops pulling at 4800.
Every once in a while it will pull up to 5600 but mostly goes flat from 1st to 2nd or 2nd to 3rd. I removed the pcmforless chip and it was worse. I just installed a NX wet kit and cannot enjoy it until I cure this.
Every once in a while it will pull up to 5600 but mostly goes flat from 1st to 2nd or 2nd to 3rd. I removed the pcmforless chip and it was worse. I just installed a NX wet kit and cannot enjoy it until I cure this.
Get a WB O2. See what's happening at top end. Very likely going lean.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I can't see the LT1 intake failing to deliver by low 5ks.
Indeed data log and look at the O2 sensor readings to see if it's getting enough fuel.
If all is ok there, consider a clogged cat or two or maybe opti issues.
Indeed data log and look at the O2 sensor readings to see if it's getting enough fuel.
If all is ok there, consider a clogged cat or two or maybe opti issues.
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Racer
Joined: Jan 2004
Posts: 398
Likes: 0
From: Eastern Shore Maryland
UPDATE: I replaced the right o2 for code set, test drive good, so now it time to have alittle fun w/the juice,WRONG at 4800 it just stops pulling, tried 50,75,100 shot all the same more pronounced w/100 shot. So after reading up on the very helpfull nitrous forums (CF,LS1Tech) I found that spark plug type and gap may be at fault. Bought a set of NGKTR6 plug and crossed my fingers, well mine are AC-41-904 gapped at .050 plus. With a hopeful smile I replaced w/the NGKs and went for another test drive w/50 shot. WOW pulls to 5500 great so I removed the pcmforless chip to send back to Alvin to set up for 100 shot and put the 100 shot pills in. If I can get all my stuff done this morning may head up to Cecil County Dragway to see the numbers.
