Broke down at C.O.T.A. - Page 3 - ZR-1 Net Registry Forums

Ccmano · 11-09-2020

Quote:

Originally Posted by rossgn49u

ECM is $87.00 at Autozone and cheaper on Rockauto. Hope their pricing is correct.

Not a chance.... you have to be very careful sourcing LT5 parts from most retail parts suppliers. More often than not those parts are not for an LT5. Most are clueless as to what an LT5 is and how different it is from an SBC. You have to know exactly what your looking for. That said, as long as your active in this community most parts can be sourced. As I said previously, an ECM or a DIS unit will be pricey.

Based on what I saw on your post in CF, looks like the Austin Corvette guys are reasonably competent and feel it may just be a connector issue.
H

-=Jeff=- · 11-10-2020

Rockauto has the WRONG ECM listed for the LT5, as do many of the automotive places (Autozone, Advance, etc)

GOLDCYLON · 11-11-2020

Quote:

Originally Posted by rossgn49u

ECM is $87.00 at Autozone and cheaper on Rockauto. Hope their pricing is correct.

No way thats an LT5 ECM

rossgn49u · 12-06-2020

Update: Had car shipped back from Austin a couple weeks ago. Austin Corvette tried a few things including cleaning ignition module connector. Car ran ok for a few miles, afterward, but then started missing again. Decided to ship it home and see if I could sort it out on my own. I read a post that suggested re-seating the EEPROM. Removed ECU today, reseated EEPROM and re-seated ECU connectors. Took it out for a 10 mile road test and so far it's running like a champ. Will let it sit overnight and run it from a cold start tomorrow. Crossing my fingers!

ram_g · 12-06-2020

Hope that's what it was!!

rossgn49u · 12-07-2020

Well, after sitting overnight, started up this afternoon, and it's missing again.

Corvette95 · 12-07-2020

Check your alternator connection - not just visually but remove and clean if you can, plus check your battery terminals and check your alternator with a DVM.

32valvesftw · 12-07-2020

Quote:

Originally Posted by Corvette95

Check your alternator connection - not just visually but remove and clean if you can, plus check your battery terminals and check your alternator with a DVM.

Probably a good idea to check your battery connections as well. First rule of troubleshooting, start with the easiest thing first.

rossgn49u · 12-17-2020

..ECU is back from repair. Started up fine and drove it 60 miles no issues. Have a SES light, but when I check codes, I only get a Code 12. Start it up and the SES light returns?

rossgn49u · 12-29-2020

Ok...ECU is on it's second trip back from G7 Computer Repair. Looks like the are calling it a software issue. We'll see. Don't expect to receive it until next week, though.

"The computer you sent here has been repaired. There was a software failure on the board, so the unit did not need to be opened (which is always better for it) because the hardware all tested OK. Software repairs typically take longer than hardware faults, so a lot of time was put into this unit. Usually when the computer fails, so does another part on the vehicle, and if all the damaged parts on the vehicle are not replaced at the same time, then the original problem may still exist, or even cause damage again to the computer (which is not covered under warranty, as stated in the Terms and Conditions on the website) and/ or vehicle. Anything electrically related to the symptoms with the vehicle should be checked. It could not be determined if the fault was a result of another problem with the vehicle or a manufacturer's defect because the vehicle was not here for inspection. Your computer was shipped back out within one business day after it arrived here (as stated in the Terms and Conditions, "one day" is defined as shipping out by the end of the following business day that the computer is received here from the customer)."

11-10-2020	#22
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: Broke down at C.O.T.A. Rockauto has the WRONG ECM listed for the LT5, as do many of the automotive places (Autozone, Advance, etc) __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

12-06-2020	#24
rossgn49u Join Date: Apr 2018 Location: Lone Star State Posts: 100	Re: Broke down at C.O.T.A. Update: Had car shipped back from Austin a couple weeks ago. Austin Corvette tried a few things including cleaning ignition module connector. Car ran ok for a few miles, afterward, but then started missing again. Decided to ship it home and see if I could sort it out on my own. I read a post that suggested re-seating the EEPROM. Removed ECU today, reseated EEPROM and re-seated ECU connectors. Took it out for a 10 mile road test and so far it's running like a champ. Will let it sit overnight and run it from a cold start tomorrow. Crossing my fingers! __________________ Ross Lone Star State 90 ZR-1 Red/Red (Sold) 94 ZR-1 Blk/Blk (Sold) 91 ZR-1 DRM/Tan (Sold) 90 ZR-1 Red/Red (Sold)

12-06-2020	#25
ram_g Join Date: Jun 2020 Location: Houston, TX Posts: 183	Re: Broke down at C.O.T.A. Hope that's what it was!!

12-07-2020	#26
rossgn49u Join Date: Apr 2018 Location: Lone Star State Posts: 100	Re: Broke down at C.O.T.A. Well, after sitting overnight, started up this afternoon, and it's missing again. __________________ Ross Lone Star State 90 ZR-1 Red/Red (Sold) 94 ZR-1 Blk/Blk (Sold) 91 ZR-1 DRM/Tan (Sold) 90 ZR-1 Red/Red (Sold)

12-07-2020	#27
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,119	Re: Broke down at C.O.T.A. Check your alternator connection - not just visually but remove and clean if you can, plus check your battery terminals and check your alternator with a DVM. __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454

12-17-2020	#29
rossgn49u Join Date: Apr 2018 Location: Lone Star State Posts: 100	Re: Broke down at C.O.T.A. ..ECU is back from repair. Started up fine and drove it 60 miles no issues. Have a SES light, but when I check codes, I only get a Code 12. Start it up and the SES light returns? __________________ Ross Lone Star State 90 ZR-1 Red/Red (Sold) 94 ZR-1 Blk/Blk (Sold) 91 ZR-1 DRM/Tan (Sold) 90 ZR-1 Red/Red (Sold)

12-29-2020	#30
rossgn49u Join Date: Apr 2018 Location: Lone Star State Posts: 100	Re: Broke down at C.O.T.A. Ok...ECU is on it's second trip back from G7 Computer Repair. Looks like the are calling it a software issue. We'll see. Don't expect to receive it until next week, though. "The computer you sent here has been repaired. There was a software failure on the board, so the unit did not need to be opened (which is always better for it) because the hardware all tested OK. Software repairs typically take longer than hardware faults, so a lot of time was put into this unit. Usually when the computer fails, so does another part on the vehicle, and if all the damaged parts on the vehicle are not replaced at the same time, then the original problem may still exist, or even cause damage again to the computer (which is not covered under warranty, as stated in the Terms and Conditions on the website) and/ or vehicle. Anything electrically related to the symptoms with the vehicle should be checked. It could not be determined if the fault was a result of another problem with the vehicle or a manufacturer's defect because the vehicle was not here for inspection. Your computer was shipped back out within one business day after it arrived here (as stated in the Terms and Conditions, "one day" is defined as shipping out by the end of the following business day that the computer is received here from the customer)." __________________ Ross Lone Star State 90 ZR-1 Red/Red (Sold) 94 ZR-1 Blk/Blk (Sold) 91 ZR-1 DRM/Tan (Sold) 90 ZR-1 Red/Red (Sold)