WOT problem
WOT problem Problem is now fixed thanks to FROST.
The Tachometer is still acting up and not showing the correct RPM but the 1800 RPM wall it would hit has been moved to 6400~6500 RPM like it should be.
The car is a 1998 Camaro Z28 LS1 A4 3.42 rear. Line pressure has been bumped up a notch on the 4L60E, Installed 226/226 .585/.585 112lsa cam, LS6 intake, Longtubes, ORY, SLP lid. Before the cam install but with the other mentioned mods if you put the pedal to the floor it would go WOT and scream through the gears. After the cam install it is a little funny acting. Sometimes if you put it in overdrive and put the pedal to the floor it acts like it should and goes WOT from 1st to 2nd to 3rd no problems hauling ***! Other times if you put it to the floor it creeps, rpms never go above 1800 and it shifts from 1st to 2nd to 3rd before your going 50 mph and never goes over 1800 rpms. ???? Anyone ever seen that?
BTW the car keeps 6-7 codes (no tuning done yet) EGR, AIR, Rear O2 sensors and a random misfire code. EDIT: CODES ARE GONE SINCE DYNO TUNE
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Got the TUNE and it is still acting up
Car has Been dyno tuned and runs great EXCEPT Sometimes when you stomp it to the floor.
Newest problem as of yesterday:
Right after the tune it ran awesome. Car shifted at 6500 RPM like it was supposed to. It has just started short shifting at 4600 rpm under WOT instead of the 6500 setting. And it will hit the rev limiter in the 5000 range if for some reason it makes it there(happened once) every other time it is shifting at 4600-4800rpm but found 5500 once last night and bounced around like it was hitting the rev limiter (which is set at 6600 RPM) WTF???
Oldest problem:
About two weeks after I put the cam in the car before it was tuned the car started acting up. When it wanted to it would do great, put it to the floor and bam hauls *** like it should; but every now and then it would not - you could go WOT and it would hit 1800 RPM and not go any higher and quickly shift through all of the gears.
The Older problem is intermittent, the other just started yesterday and from what I have seen happens everytime I go WOT and the older problem listed hasnt cropped back up yet since the new one yesterday - time will tell. I will be hooking it up on EFI live again this weekend to see what if anything shows up.
Nothing showed up on EFI live before with the other problem. Everything seemed normal. I have changed the TPS sensor and put a new MAF on it. Neither one helped at all.
The Tachometer is still acting up and not showing the correct RPM but the 1800 RPM wall it would hit has been moved to 6400~6500 RPM like it should be.
The car is a 1998 Camaro Z28 LS1 A4 3.42 rear. Line pressure has been bumped up a notch on the 4L60E, Installed 226/226 .585/.585 112lsa cam, LS6 intake, Longtubes, ORY, SLP lid. Before the cam install but with the other mentioned mods if you put the pedal to the floor it would go WOT and scream through the gears. After the cam install it is a little funny acting. Sometimes if you put it in overdrive and put the pedal to the floor it acts like it should and goes WOT from 1st to 2nd to 3rd no problems hauling ***! Other times if you put it to the floor it creeps, rpms never go above 1800 and it shifts from 1st to 2nd to 3rd before your going 50 mph and never goes over 1800 rpms. ???? Anyone ever seen that?
BTW the car keeps 6-7 codes (no tuning done yet) EGR, AIR, Rear O2 sensors and a random misfire code. EDIT: CODES ARE GONE SINCE DYNO TUNE
__________________________________________________ __________
Got the TUNE and it is still acting up
Car has Been dyno tuned and runs great EXCEPT Sometimes when you stomp it to the floor.
Newest problem as of yesterday:
Right after the tune it ran awesome. Car shifted at 6500 RPM like it was supposed to. It has just started short shifting at 4600 rpm under WOT instead of the 6500 setting. And it will hit the rev limiter in the 5000 range if for some reason it makes it there(happened once) every other time it is shifting at 4600-4800rpm but found 5500 once last night and bounced around like it was hitting the rev limiter (which is set at 6600 RPM) WTF???
Oldest problem:
About two weeks after I put the cam in the car before it was tuned the car started acting up. When it wanted to it would do great, put it to the floor and bam hauls *** like it should; but every now and then it would not - you could go WOT and it would hit 1800 RPM and not go any higher and quickly shift through all of the gears.
The Older problem is intermittent, the other just started yesterday and from what I have seen happens everytime I go WOT and the older problem listed hasnt cropped back up yet since the new one yesterday - time will tell. I will be hooking it up on EFI live again this weekend to see what if anything shows up.
Nothing showed up on EFI live before with the other problem. Everything seemed normal. I have changed the TPS sensor and put a new MAF on it. Neither one helped at all.
Last edited by Stephen Griner; Mar 14, 2008 at 07:20 AM. Reason: added info from new post in other thread/merge
Moved from advanced tech.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
I've seen this before on just 98s and the first time I got it, it took me forever to solve and a lot of digging around.
Outside of the normal midfore table adjustment, there is an internal test that needs to be disabled. In HPTuners, it is under Engine Diag>General. There are 2 boxes that say P0121 Error Max Map and P0121 Error Min Map. By default these values are 65 and 55 respectively. Ask your tuner to set the min to 0 and the max to 100 to disable this test, and unless you have internal tranny problems, should "disable" this problem as well.
Best of luck.
Outside of the normal midfore table adjustment, there is an internal test that needs to be disabled. In HPTuners, it is under Engine Diag>General. There are 2 boxes that say P0121 Error Max Map and P0121 Error Min Map. By default these values are 65 and 55 respectively. Ask your tuner to set the min to 0 and the max to 100 to disable this test, and unless you have internal tranny problems, should "disable" this problem as well.
Best of luck.
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I've seen this before on just 98s and the first time I got it, it took me forever to solve and a lot of digging around.
Outside of the normal midfore table adjustment, there is an internal test that needs to be disabled. In HPTuners, it is under Engine Diag>General. There are 2 boxes that say P0121 Error Max Map and P0121 Error Min Map. By default these values are 65 and 55 respectively. Ask your tuner to set the min to 0 and the max to 100 to disable this test, and unless you have internal tranny problems, should "disable" this problem as well.
Best of luck.
Outside of the normal midfore table adjustment, there is an internal test that needs to be disabled. In HPTuners, it is under Engine Diag>General. There are 2 boxes that say P0121 Error Max Map and P0121 Error Min Map. By default these values are 65 and 55 respectively. Ask your tuner to set the min to 0 and the max to 100 to disable this test, and unless you have internal tranny problems, should "disable" this problem as well.
Best of luck.
Best I can tell this fixed the 1800 rpm barrier I was hitting. I still have tach problems though.
Thanks,
Stephen
Last edited by Stephen Griner; Mar 12, 2008 at 08:51 AM.
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Verdad Gallardo As stated in the first post the problem is now fixed thanks to FROST. The Car shifts at 6400-6500 RPM like it should under WOT. Now if I can just figure out what is wrong with the TACH.
