Full engine Power light - ZR-1 Net Registry Forums

SteveCanyon · 05-03-2015

When I turn the valet key to full power the full engine power light briefly illuminates then goes out. Is it supposed to be on all the time? It will come on and stay if I move the key to the stop and hold it, but if I release that pressure the light goes out. Car does not seem to be making full power. The first time I got on it the rpm stopped climbing and stopped at about 5.5K RPM and then got the Check Engine light.

Second, I hooked up my scanner and got codes 12, 55 & 65. Is code 55 Fuel Monitor lean, and code 65 Right O2 Sensor? If so, what should my trouble shooting process be from here?

Kevin · 05-03-2015

code 55 is Fuel Monitor Lean

65 is Right Oxygen Sensor (Right Bank Rich)

the light should stay on all the time, and since you have a 90 it's a very simple fix to rebuild the power key. And you're in luck because I already did a write up on how to fix it http://www.zr1.net/forum/showthread.php?t=15255

SteveCanyon · 05-03-2015

Kevin, thanks and that will give me a start on that problem. Any other ideas of what is driving the 55/65 codes? Does the right O2 sensor need to be replaced? Would a faulty secondary fuel pump cause one or both of the above codes? Would low fuel pressure from the secondary pump cause the full engine power light not to illuminate even with the key in the full power position?

Kevin · 05-03-2015

With code 55 and the cutting out over 5500 I'm thinking you have a bad secondary pump, I'd replace both pumps with 454 suburban pumps. 65 could be leaking injectors. 12 is just a check code, nothing to worry about there

SteveCanyon · 05-03-2015

Thanks, sounds like time to do the fuel pumps and injectors, my car is a bone stock 90 with 16K miles and pretty sure the injectors have never been done. Both pumps are the same correct?

Kevin · 05-03-2015

The injectors definitely need done at that point. http://fuelinjectorconnection.com/sh...gory&cat_id=15 is who'd i'd go with, I believe they're a registry sponsor, which you should join by the way, great organization. And they offer a life time warranty

SteveCanyon · 05-03-2015

I ordered 2 of the pumps from Rock Auto and will order the injectors from Jerry's with the gaskets.

PhillipsLT5 · 05-04-2015

Quote:

Originally Posted by SteveCanyon

I ordered 2 of the pumps from Rock Auto and will order the injectors from Jerry's with the gaskets.

Get the new, not rebuilt injectors

A26B · 05-04-2015

Quote:

Originally Posted by PhillipsLT5

Get the new, not rebuilt injectors

That's all we carry....New

PhillipsLT5 · 05-04-2015

Quote:

Originally Posted by A26B

That's all we carry....New

Jerry is always on top of it

05-03-2015	#1
SteveCanyon Join Date: Apr 2015 Location: Northwest AR Posts: 95	Full engine Power light & Check Engine light When I turn the valet key to full power the full engine power light briefly illuminates then goes out. Is it supposed to be on all the time? It will come on and stay if I move the key to the stop and hold it, but if I release that pressure the light goes out. Car does not seem to be making full power. The first time I got on it the rpm stopped climbing and stopped at about 5.5K RPM and then got the Check Engine light. Second, I hooked up my scanner and got codes 12, 55 & 65. Is code 55 Fuel Monitor lean, and code 65 Right O2 Sensor? If so, what should my trouble shooting process be from here? Last edited by SteveCanyon; 05-03-2015 at 11:21 AM.

05-03-2015	#2
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: Full engine Power light code 55 is Fuel Monitor Lean 65 is Right Oxygen Sensor (Right Bank Rich) the light should stay on all the time, and since you have a 90 it's a very simple fix to rebuild the power key. And you're in luck because I already did a write up on how to fix it http://www.zr1.net/forum/showthread.php?t=15255 __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

05-03-2015	#3
SteveCanyon Join Date: Apr 2015 Location: Northwest AR Posts: 95	Re: Full engine Power light Kevin, thanks and that will give me a start on that problem. Any other ideas of what is driving the 55/65 codes? Does the right O2 sensor need to be replaced? Would a faulty secondary fuel pump cause one or both of the above codes? Would low fuel pressure from the secondary pump cause the full engine power light not to illuminate even with the key in the full power position? Last edited by SteveCanyon; 05-03-2015 at 12:42 PM.

05-03-2015	#4
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: Full engine Power light With code 55 and the cutting out over 5500 I'm thinking you have a bad secondary pump, I'd replace both pumps with 454 suburban pumps. 65 could be leaking injectors. 12 is just a check code, nothing to worry about there __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

05-03-2015	#5
SteveCanyon Join Date: Apr 2015 Location: Northwest AR Posts: 95	Re: Full engine Power light Thanks, sounds like time to do the fuel pumps and injectors, my car is a bone stock 90 with 16K miles and pretty sure the injectors have never been done. Both pumps are the same correct? Last edited by SteveCanyon; 05-03-2015 at 01:05 PM.

05-03-2015	#6
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: Full engine Power light The injectors definitely need done at that point. http://fuelinjectorconnection.com/sh...gory&cat_id=15 is who'd i'd go with, I believe they're a registry sponsor, which you should join by the way, great organization. And they offer a life time warranty __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

05-03-2015	#7
SteveCanyon Join Date: Apr 2015 Location: Northwest AR Posts: 95	Re: Full engine Power light I ordered 2 of the pumps from Rock Auto and will order the injectors from Jerry's with the gaskets.