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To remove the pcm just disconnect the battery and its easily accessible thru the fender tire well? Im trying to send it in for a mail order tune. The lmc5 is considered a steering column lock bypass module or is there a different one in reference to tuning or turning off the vats in the pcm for the pull key wait 10 seconds.
Okay any reason to not have a cam headers car tuned by frost thru mail order tuning? He told me as long as i had a "steering column lock bypass module" that he could turn off the messages thru the vats another pcm place said they could turn off the vats which should get rid of the 2mph fuel cut but like he said would have to have the steering column lock bypass module. Is the lmc5 considered a steering column lock bypass module as thats what i already have. There are other bypass modules that are inserted into the steering column plug is that what i need or do i already have the steering column lock bypass module already known as the lmc5?
Okay i dont have a steering column lock as far as i know or the cars steering wheel has never locked since i've owned it. Does that mean i wouldn't have to use the underdash column lock bypass module. I already have an lmc5 which plugs into the bcm.
There's that inner fender that bolts in behind the passenger front tire. Thats the way to access it correctly? Im going to send it in for a mail order tune by a reputable tuner. Said his tune end is good as long as maf sensors, injectors are functioning as its a 20 year old car but its hard to read that stuff without tuning it in person. I think if it had maf problems or stuff out of range it would have codes for that. Its a mail order tune for tsp headers, small cam. Both mail order tuners said they think the "pull key wait 10 seconds" would be turned off with vats or tuned out if i had a steering column lock bypass module. There are other bypass modules that plug directly under the steering column but as i have the lmc5 that plugs into the bcm it should function the same.
I know two people who had their Chevy SS tuned by him via mail order and both are happy with the results. He's reputable as far as I know.
the new 2017 6.2l 415 hp chevy ss 4 door sedans? What mods did they have that required tuning? Headers, intake or cam/heads? Someone on ls1tech told me they had a 6.0 cammed tuned from him and the car would idle but rev or bog down something of those lines and when asked if he could correct the issues said he didnt help with mail order tunes that were done and needed live data logging.
Well pcmofnc also does tuning i spoke with them said they could get the tune close and were confident with their tuning skills. They said theyd probably put it in a speed density tune where i could either use or delete the maf. Has anyone else used them for a mail order tune? The local ls shop could tune it monday but its 450$ and im nervous about the stock 4l60e on the dyno. I've only WOT the car for short intervals since i've had it with headers and air filter. Bought the cam for added sound effects as it is a daily driver corvette the dyno puts it thru multiple full throttle pulls not sure if the dyno is loaded down or weighted as if it were pushing 3250lb car? The cars ive had dynotuned were 6 speeds with clutches.
Well pcmofnc also does tuning i spoke with them said they could get the tune close and were confident with their tuning skills. They said theyd probably put it in a speed density tune where i could either use or delete the maf. Has anyone else used them for a mail order tune? The local ls shop could tune it monday but its 450$ and im nervous about the stock 4l60e on the dyno. I've only WOT the car for short intervals since i've had it with headers and air filter. Bought the cam for added sound effects as it is a daily driver corvette the dyno puts it thru multiple full throttle pulls not sure if the dyno is loaded down or weighted as if it were pushing 3250lb car? The cars ive had dynotuned were 6 speeds with clutches.
Don't worry about that stock 4L60E. A good tuner will change a few parameters in it BEFORE tuning for power. I do know one important thing about the trans tune. My tuner said NEVER TOTALLY REMOVE TORQUE MANAGEMENT. He showed me the stock setting on it, and IIRC, it was like 450 ft/lbs. So he raised it to 1,000 ft/lbs, but DID NOT remove it. I realize I'm in the minority, but my 23 year old, original, stock 4L60E is still in place with no issues. I've had 2 different 427 engines yanking on it for almost 17 years now, and it works great. Yes, I musta got a good one, probably every component in it is working just as GM designed it. Yes-Sooner or later it's gonna blow, and I now have almost 125,000 miles on it, the last 65,000 miles with 500+whp. But that time isn't here.......YET!! Let her rip, justin!!!
So what are you suggesting pcmofnc who said they were confident as the cam is pretty small and alvins one of the best tuners in that area or a local lsx performance dyno shop thats been around for 13 years. LOL you sure the local shop will adjust the 4l60e before tuning it or WOT see where its at then adjust the tune? Id have to drop the car off for 2hours and 450$. It ran good with the tsp headers but ive only WOT it a few times never 1/4 miled just yet did one manual 2-3-od shift from 30-130 one time and thats it. The engine and trans felt strong.
How many passes have you made on the stock c5 stock 4l60e? Local transmission shop said it was same internals or rebuild as 700r4 and reg 4l60e transmission. Not sure why the corvettes is different other then a corvette servo and from what i seen the original no screen shift solenoid have you ever seen one? I had to replace one of mine with a standard 4l60e shift solenoid as the copper wires and cap were broke when changing fluid and filter when i bought the car. It had the stock style white filter im assuming original vs the metal style filter i replaced it with from autozone. I had asked a question on here regarding this and was never able to find the same part number that the 99 corvette solenoids say. I had to go with a screened shift solenoid. Any idea if the no screen style shifts faster? LOL let me know if anyone has seen the c5 shift solonoids i didnt remove the other one but the one i did remove had no screen and both were the same part numbers that i couldnt find a replacement with the same part number.
Last edited by Justin Raney; Feb 10, 2022 at 11:11 AM.
Well im supposed to have the car dynotuned monday at 10am with a wideband. Shouldnt take but a couple hours and i can wait while its being tuned. Are there any things to consider when having it tuned? Tune for cam and headers. Turn off ses for rear o2s and air pump. Change fan settings and possibly disable or turn off vats for the 2mph fuel cut as i have lmc bypass module. Up the line pressure for firmer shifts as well as rev limiter and 1-2 shift points higher rpm maybe 6200? This cam should make power to 6500 but the pac 1219s valve float at 6700.
One thing i did find is a shift solenoid similar to the original 8131. Its bundled up with the rest of the solenoids on ebay for 60$. Im curious as amazon and gmpartsdirect as the screened above pictured solenoid listed above for the 99 corvette. I may trying finding one that doesnt have the screen seems it would allow for more fluid flow. Only thing is this is unbranded chinese but does have similar 8131 part numbers. They list it on ebay for 04 corvette. Seems its a big difference from the standard 4l60 solenoid. Metal 4L60E Trans Master Solenoid Kit Rebuild EPC Shift TCC 5pc For Pontiac | eBay
I may stop by the local gm parts dealership to see what they have as the replacement solenoid and part number listed for 99 corvette.
Removing pcm
Let her rip, justin!!!
