Engine no start after ECM put back in - Page 2 - ZR-1 Net Registry Forums

Corvette95 · 02-26-2022

Quote:

Originally Posted by Jetjock

What kind of damage could an x-ray do to an ECM? I do have SYS light and the check engine light on.

Roy

Probably none but I have heard about uv rays can erase or corrupt a PROM . I have not seen this in person and was read about online.

Jetjock · 02-26-2022

Well, the first thing that I plan to do is check the fuel pumps as I did not hear them running when I turned the key to on. They are relatively new and always worked until I put the ECM back in. Then expand it out. I have a strong starter and electrical power from the battery so I can rule them out. We have been moving so its been difficult to work on it plus its been cold as blazes. Next week, I will be able to get into it. Thanks for your help. I didn't get any codes on the ECM so I'm pretty sure it's ok. I will call Haibeck Monday and discuss it when him. I don't have a Tech 2 so its old-fashion bloodhound checking to fix it. Thanks for the help.

Roy

Jetjock · 02-27-2022

Okay today, I checked the fuses and they were all good. Next, I hooked up a pressure gauge to the Schrader valve and turned on the ignition. Nothing. So now I will go a little further and check the fuel pumps themselves. I put those pumps in 2019 and they were relatively new. They worked perfectly until now. I'll talk to Marc tomorrow about the problem.

Roy

Perry Mitchell · 02-28-2022

Did you remove the Schrader valve before connecting the fuel gauge?

Jetjock · 03-08-2022

Quote:

Originally Posted by Perry Mitchell

Did you remove the Schrader valve before connecting the fuel gauge?

Well, kinda have to to attach the the gauge. I've done this before.

Roy

Jetjock · 03-10-2022

I tested the fuel pumps and nothing. I used direct and the fuel pump testing
connector. I could tell that the current was there by watching it spark. So both are dead probably locked up. I could hear something trying to activate from the back of the car but no fuel flow. So now, I need to find a couple of fuel pumps for my Z. Any recommendations?

Roy

tccrab · 03-11-2022

Jerrys Gaskets.

If he doesn't have them he will know where to get them.

That being said, there is an option of using only one pump, see Marc Haibec's site for details.

Crabs

XfireZ51 · 03-11-2022

Quote:

Originally Posted by Corvette95

Probably none but I have heard about uv rays can erase or corrupt a PROM . I have not seen this in person and was read about online.

You would need to apply UV light to a prom for over 25-30min w no other light seeping in to erase a 2732 type eprom. Before flash proms, that was part of the process for reprogramming an eprom.
Flash proms were a godsend if you do ur own tuning.

Jetjock · 04-12-2022

I was able to get the car started today after putting in one of the old pumps and running on just the primary pump. I'm waiting on the brass Y connector from Carter and I'll pull out the old one and put in the new setup. At least it started.

Roy

02-26-2022	#12
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 556	Re: Engine no start after ECM put back in Well, the first thing that I plan to do is check the fuel pumps as I did not hear them running when I turned the key to on. They are relatively new and always worked until I put the ECM back in. Then expand it out. I have a strong starter and electrical power from the battery so I can rule them out. We have been moving so its been difficult to work on it plus its been cold as blazes. Next week, I will be able to get into it. Thanks for your help. I didn't get any codes on the ECM so I'm pretty sure it's ok. I will call Haibeck Monday and discuss it when him. I don't have a Tech 2 so its old-fashion bloodhound checking to fix it. Thanks for the help. Roy __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

02-27-2022	#13
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 556	Re: Engine no start after ECM put back in Okay today, I checked the fuses and they were all good. Next, I hooked up a pressure gauge to the Schrader valve and turned on the ignition. Nothing. So now I will go a little further and check the fuel pumps themselves. I put those pumps in 2019 and they were relatively new. They worked perfectly until now. I'll talk to Marc tomorrow about the problem. Roy __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

02-28-2022	#14
Perry Mitchell Join Date: Nov 2018 Location: Washington Posts: 98	Re: Engine no start after ECM put back in Did you remove the Schrader valve before connecting the fuel gauge?

03-10-2022	#16
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 556	Re: Engine no start after ECM put back in I tested the fuel pumps and nothing. I used direct and the fuel pump testing connector. I could tell that the current was there by watching it spark. So both are dead probably locked up. I could hear something trying to activate from the back of the car but no fuel flow. So now, I need to find a couple of fuel pumps for my Z. Any recommendations? Roy __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary

03-11-2022	#17
tccrab Join Date: Oct 2004 Location: Folsom CA Posts: 1,657	Re: Engine no start after ECM put back in Jerrys Gaskets. If he doesn't have them he will know where to get them. That being said, there is an option of using only one pump, see Marc Haibec's site for details. Crabs __________________ TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B]

04-12-2022	#19
Jetjock Join Date: Mar 2008 Location: Auburn, KY Posts: 556	Re: Engine no start after ECM put back in I was able to get the car started today after putting in one of the old pumps and running on just the primary pump. I'm waiting on the brass Y connector from Carter and I'll pull out the old one and put in the new setup. At least it started. Roy __________________ Roy L. Carman If I feel the need for speed, I just think about flying the B-777. 1989 Dk Blue Coupe lost in divorce 1991 Black Coupe SOLD 1992 Black ZR-1 #423 SOLD! 1993 Ruby Red 40th Anniversary ZR-1 #334 1995 Black ZR-1 taken by ex-wife 2002 Pewter Coupe no idea where it is 2003 50th Anniversary Corvette #No idea what number SOLD! ZR-1 Net Registry #516 Grand Sport Lifetime Member NCM Lifetime #1468 ZR-1 Net Registry Board Secretary