<![CDATA[Corvette Forum - C4 Scan & Tune]]> http://forums.corvetteforum.com C4 Corvette Performance Chips, ECM/PCM Modifications, Dyno Tuning, Fuel Management, Tuning Software en Sat, 21 Nov 2009 04:41:52 GMT vBulletin 60 http://images.corvetteforum.com/images/misc/rss.jpg <![CDATA[Corvette Forum - C4 Scan & Tune]]> http://forums.corvetteforum.com LT1 F body vs. Y body tune http://forums.corvetteforum.com/c4-scan-and-tune/2472520-lt1-f-body-vs-y-body-tune-new-post.html Sat, 21 Nov 2009 02:35:23 GMT Ok so I did some searching but didn't find much. I have a 95 Firebird Formula that has had a tune done by previous owner. Previous owner also said he could tell a decent improvement in before & after performance wise.

I also have a 95 bone stock Corvette. Both are A4, K&N, Magnaflow, stock long block equipped. Only difference is the Fbody has LT headers. I am wondering if I can upload the tune from the Fbody to the Ybody ECM with no side effects?

Has anyone else done this or know someone who has? Thanks in advance. ]]> mbowers13 http://forums.corvetteforum.com/c4-scan-and-tune/2472520-lt1-f-body-vs-y-body-tune.html anybody have any experience with wideband O2 sensors?, is so step inside http://forums.corvetteforum.com/c4-scan-and-tune/2468713-anybody-have-any-experience-with-wideband-o2-sensors-is-so-step-inside-new-post.html Sun, 15 Nov 2009 16:22:21 GMT I am tuning my newly supercharged 93 corvette. I am using tunerpro, and the proper definition file,... I am tuning my newly supercharged 93 corvette. I am using tunerpro, and the proper definition file, to tweak my WOT air/fuel ratios.

Anyways, I want to get a wideband O2 sensor to monitor A/F ratios in real-time while driving.

I plan on just welding in another bung for it behind my existing narrowband O2 sensors - which will still be used by the stock ECU for part-throttle trims.

My questions are:

1. Does any manufacturer make a better gauge than the other?

2. Is it worth the expense to get a guage with 'playback capability' or is eyeballing it during WOT runs usually good enough?

3. I see kits with Bosch 4.2 and a Bosch 4.9 wideband exhaust sensor. The only difference I can ascertain is that the Bosch 4.9 measures 10 to 20:1 AFR vs. 11 to 16:1 AFR.

4. Are wideband O2 sensors 'heated'?

5. Where should I weld the bung in at on my exhaust system? Does it need to be close to the header collector where it is real hot, or can it be downstream farther?

6. Whats better, a digital wideband gage or analog one?

7. Which bank should I monitor, left (Drivers side) or right bank? Note: its not clear whether an LT1 exhaust has significant cross-over.
Its rather just a 'true-dual' type setup. (Im leaning towards monitoring the driver's side bank since thats the bank that is at most risk of leaning out due to 2 adjacent cylinders firing one right after the other.)

The gauge Im looking at, due to cost and function, is made by AEMpower. I like the combination of digital and analog readout. The red readout goes best with 'orange' backlights on my 93 and the combination of analog and digital make it real clear if Im leaning out.

Its below:
http://www.aempower.com/ViewProduct.aspx?ProductID=73 ]]> dizwiz24 http://forums.corvetteforum.com/c4-scan-and-tune/2468713-anybody-have-any-experience-with-wideband-o2-sensors-is-so-step-inside.html Bin File http://forums.corvetteforum.com/c4-scan-and-tune/2468642-bin-file-new-post.html Sun, 15 Nov 2009 13:44:12 GMT OBD1 Does anyone have a been file for an L98 with: Stock Displacment AFR Eliminator street 195... OBD1
Does anyone have a been file for an L98 with:

Stock Displacment
AFR Eliminator street 195 heads (#1040)
LT headers
Lingenfelter 74211 cam
No air pump
true duel exhaust

I just need a good starting place.

Thanks ]]> cshuman http://forums.corvetteforum.com/c4-scan-and-tune/2468642-bin-file.html <![CDATA[*** Error Codes 43 & 54 *** How do it get rid of them ??]]> http://forums.corvetteforum.com/c4-scan-and-tune/2468022-error-codes-43-and-54-how-do-it-get-rid-of-them-new-post.html Sat, 14 Nov 2009 15:13:36 GMT I am some error code issues. The main one is code 43 (Low voltage at electronic spark timing... I am some error code issues. The main one is code 43 (Low voltage at electronic spark timing circuit). I replaced the module in the distributor, but I still get the code 43.

I also get an occasional code 54 (Low voltage at fuel pump OR Low voltage at Fuel pump relay OR Output failure at quad driver module). This error code comes and goes.

The car is a 1985 vette with a 1990 f-body (7730) ecm and a custom chip.

I need some direction as to possible fixes for this.

Thanks in advance for any help! ]]> Hole-Shot http://forums.corvetteforum.com/c4-scan-and-tune/2468022-error-codes-43-and-54-how-do-it-get-rid-of-them.html occasional miss w/94 LT1 http://forums.corvetteforum.com/c4-scan-and-tune/2467843-occasional-miss-w-94-lt1-new-post.html Fri, 13 Nov 2009 14:03:38 GMT I've cleaned the maf, has new msd wires as well as a newer fuel filter, but I have an intermittent miss or hesitation when giving the motor hard acceleration. Could this be the ignition mod, coil, or hopefully not the opti? The car starts right up, and has 50k on it and babied. Thanks for any feedback. ]]> jimyz http://forums.corvetteforum.com/c4-scan-and-tune/2467843-occasional-miss-w-94-lt1.html edcmat-l1 tuning in Pittsburgh. http://forums.corvetteforum.com/c4-scan-and-tune/2465798-edcmat-l1-tuning-in-pittsburgh-new-post.html Tue, 10 Nov 2009 13:35:17 GMT I'll be in Pittsburgh tuning from Nov 19th to the 22nd. I have enough room time wise to squeeze 2 or 3 more in. The shop I'll be using has a Dynojet.

If anyone is interested, please PM or email @ edcmat-l1@msn.com.

I use HPtuners, EFIlive, tunercat. I tune LSs, LTs, Mopars, Fords, etc. I'll be prepared to tune Mopars, as 2 of the ones I have to do are Mopars.

References available upon request.

Thanks!!
Ed :thumbs: ]]> edcmat-l1 http://forums.corvetteforum.com/c4-scan-and-tune/2465798-edcmat-l1-tuning-in-pittsburgh.html Tuner in Central Florida to burn a ECM chip? http://forums.corvetteforum.com/c4-scan-and-tune/2465343-tuner-in-central-florida-to-burn-a-ecm-chip-new-post.html Mon, 09 Nov 2009 20:46:15 GMT Need to see if someone can point me to someone on this part of the forum. I had someone make up... Need to see if someone can point me to someone on this part of the forum.

I had someone make up a chip for my 90 many years ago after I installed a super charger. I don't remember who did it, but it seems to run ok. I know it would be better to have one built custom on a dyno but I don't know anyone here in Central Florida that does that.

Another forum member posted a possible solution to a cruise control issue I am having. Requires a EPROM burn, and I don't know of anyone local that can help me with that, or if this really applies to a 90.

I remember that (daughter board) chip was pretty pricey. Anyone have any recommendation who to deal with to get this changed?

Here is what another forum member helped him with a similar problem, although an LT1 not an L98 like mine.

Quote:
Originally Posted by Vis Croceus (Post 1572091987)
"Decel Fuel Cutoff"

It's what turns off the injectors when you are coasting.

I just checked the tunercat list of parameters for your car, and it is in there, so any tuner would be able to disable it. Alternatively, you could get tunercats and tune it yourself, in which case you might be able to adjust the parameters to make them coexist.

I discovered the solution when I started trying to tune DFCO to improve mpg. The stock LT1 DFCO is very poorly calibrated and people have made significant improvements in mpg by fiddling with it. Once I realized that the interaction between DFCO and CC was the cause of the herky-jerky CC, I turned it off, and have seen no noticeable change in mpg, which supports the claim that the stock DFCO is pretty worthless.

Again, no idea how much of this will apply to your car...


p.s. it would be helpful for the next person searching on this topic if you ask a moderator to move the thread into either scan/tune or tech/perf.
]]> Flame Red http://forums.corvetteforum.com/c4-scan-and-tune/2465343-tuner-in-central-florida-to-burn-a-ecm-chip.html Scanner http://forums.corvetteforum.com/c4-scan-and-tune/2464782-scanner-new-post.html Mon, 09 Nov 2009 00:01:31 GMT Have a 1990 and want to buy a scanner or a program to check for codes and see what the systems are... Have a 1990 and want to buy a scanner or a program to check for codes and see what the systems are doing can you guys point me in the right direction.
Right now i have a service abs light on and have the fsm but it wont pull and codes with the paper clip. I forgot about the the scan and tune section i also have a post in tech.

Thanks

Steve ]]> Bulldog Steve http://forums.corvetteforum.com/c4-scan-and-tune/2464782-scanner.html OBD1 Tuners near Cleveland Ohio http://forums.corvetteforum.com/c4-scan-and-tune/2463910-obd1-tuners-near-cleveland-ohio-new-post.html Sat, 07 Nov 2009 15:24:20 GMT Looking for a tuner near Cleveland Ohio OBD1 Speed Density 7730 Looking for a tuner near Cleveland Ohio OBD1 Speed Density 7730 ]]> Cal942 http://forums.corvetteforum.com/c4-scan-and-tune/2463910-obd1-tuners-near-cleveland-ohio.html More power out of the LT4? http://forums.corvetteforum.com/c4-scan-and-tune/2463468-more-power-out-of-the-lt4-new-post.html Fri, 06 Nov 2009 20:10:08 GMT Hi guys! Still thinking there is more to squeeze out of the car to put me up there with the stock... Hi guys! Still thinking there is more to squeeze out of the car to put me up there with the stock C6s. It is not a daily driver, but I do not want to lose drivability either.

Current mods:
LT headers
Hot cam
Tune
Electricwater pump
High flow cats
Corsa exhaust

Heads and intake have not been touched other than valve guides installed and new springs.

I do NOT want to add nitrous or change the rear rear from the stock 3.45

Current HP is 341 rear wheel horsepower or just over 400 the GM way using 15% loss.

Ideas? :cheers: ]]> 96LT4 http://forums.corvetteforum.com/c4-scan-and-tune/2463468-more-power-out-of-the-lt4.html 93 Sometimes missing when driving http://forums.corvetteforum.com/c4-scan-and-tune/2462108-93-sometimes-missing-when-driving-new-post.html Wed, 04 Nov 2009 20:19:37 GMT I have a 93 corvette with about 155,00 miles on it. I have replaced the spark plugs, wires within... I have a 93 corvette with about 155,00 miles on it. I have replaced the spark plugs, wires within the last year or so, and optispark last week. Some days the car runs perfect and every other day when driving she feels like she is running on 6 cyclinders with no power. I am not getting a service engine soon light. Could it be something else that is electrical and is so wouldn't it be running bad all the time. On days she is running good, I run it for about 30 min and give the car time to get to normal temps, so the O2 sensor should be working okay. Does anyone have any suggestions. ]]> JesseMorales http://forums.corvetteforum.com/c4-scan-and-tune/2462108-93-sometimes-missing-when-driving.html what happen to Fast Chip website? http://forums.corvetteforum.com/c4-scan-and-tune/2460987-what-happen-to-fast-chip-website-new-post.html Tue, 03 Nov 2009 02:32:22 GMT Does anyone know if Ed Wright's Fast Chip website site is still working? Or is he still in business? I haven't been able to get his web site to open. ]]> rssshen vette http://forums.corvetteforum.com/c4-scan-and-tune/2460987-what-happen-to-fast-chip-website.html Memcal interchangeability for 93 LT1 http://forums.corvetteforum.com/c4-scan-and-tune/2460548-memcal-interchangeability-for-93-lt1-new-post.html Mon, 02 Nov 2009 17:32:57 GMT My memcal broadcast code for my 93 LT1 is a BAFL for a six speed. I want to get a used memcal to... My memcal broadcast code for my 93 LT1 is a BAFL for a six speed. I want to get a used memcal to place a new chip on it to program and leave my current one in stock condition. The question, will a 92-93 memcal work that is from a firebird, camaro manual or automatic LT1, since I would be taking the eprom off and putting a new socket and replaceable chip on work to program. I guess the other portion of the socket contains the knock sensor information, so is that portion of the socket the same for use with the various broadcast code memcal codes?? Am I making any sense on this?
scott ]]> scotth48 http://forums.corvetteforum.com/c4-scan-and-tune/2460548-memcal-interchangeability-for-93-lt1.html Car just stopped running. Checked codes and I need help! http://forums.corvetteforum.com/c4-scan-and-tune/2458548-car-just-stopped-running-checked-codes-and-i-need-help-new-post.html Fri, 30 Oct 2009 13:59:09 GMT I have a 1995 corvette, Auto, 90,000 miles. I have replaced water pump, opti, plugs, wires, etc.... I have a 1995 corvette, Auto, 90,000 miles. I have replaced water pump, opti, plugs, wires, etc. The car has been running great all summer long. I had the car out and it just stopped running on the Highway. I pulled several codes which were 16, 21, 22, 23. I did replace the ICM, TPS, ITS, and cleared codes and took the car out and just stopped running. I did keep popping the code for the Throttle Sensor so I put the old one back in and have taken it on short rides and the codes are gone. Is there anything I should look into before taking this on a trip longer than my city???
Any help is appreciated. ]]> slikrik030 http://forums.corvetteforum.com/c4-scan-and-tune/2458548-car-just-stopped-running-checked-codes-and-i-need-help.html <![CDATA[codes P0335 & P0336 cranksft posit indicat]]> http://forums.corvetteforum.com/c4-scan-and-tune/2456148-codes-p0335-and-p0336-cranksft-posit-indicat-new-post.html Tue, 27 Oct 2009 05:34:41 GMT I've posted a thread in the Tech and Performance forum; anyone with any ideas or insight as to why my 1996 lt4 with OBDII throws P0335 and P0335 codes relating to the crankshaft position incator and associated reluctor wheel and how to solve the problem is invited to read my thread and offer your insights and opinions. Thanks. ]]> mtwoolford http://forums.corvetteforum.com/c4-scan-and-tune/2456148-codes-p0335-and-p0336-cranksft-posit-indicat.html