"Full Engine Power" light
Team Owner
Joined: Mar 1999
Posts: 89,144
Likes: 3
From: Life's tough, wear a helmet.
Re: "Full Engine Power" light (RMK)
All '90 Corvettes have the light but it only works on the ZR1s unless you hook it up manually like MarchoPolo did.
Not sure if the light is on the DIC of the '91-95 non-ZR1 Corvettes.
Not sure if the light is on the DIC of the '91-95 non-ZR1 Corvettes.
Melting Slicks
Joined: Mar 2000
Posts: 2,225
Likes: 0
From: Georgia
Cruise-In I Veteran
Re: "Full Engine Power" light (RMK)
Well, you've got me curious now .... I know that my '90 has that light since it stays on all the time :D
I'll have to look at the '94 to see if there's a place for it.
I'll have to look at the '94 to see if there's a place for it.
Race Director
Joined: Oct 2001
Posts: 12,832
Likes: 210
From: Canton GA
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St. Jude Donor '03-'05-'06-'10-'11-'12
Re: "Full Engine Power" light (RMK)
The only thing I can fathom is the Valet Key on all ZR-1's. It is below the radio and is marked with "Normal" and "Full Power" with the LED next to "Full Power".
It's used to control the second fuel pump, secondary plenum runners, and the secondary 8 injectors on the LT-5 engine.
It's used to control the second fuel pump, secondary plenum runners, and the secondary 8 injectors on the LT-5 engine.
Drifting
Joined: Oct 2002
Posts: 1,774
Likes: 66
From: SoCal
Re: "Full Engine Power" light (Scoob)
The light on my '90 has been disconnected (too annoying to see all the time). But in the 91-95s as I have read do not have the light in the DIC, there is a LED next to the power key that lights up instead. I like that setup better, its a small LED.
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Race Director
Joined: Oct 2001
Posts: 12,832
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From: Canton GA
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St. Jude Donor '03-'05-'06-'10-'11-'12
Re: "Full Engine Power" light (Gregs_90_ZR1)
Ahhh, so that light was in the DIC on the 90's. Didn't know that. Gotta love the forum! :yesnod: :cheers:
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Re: "Full Engine Power" light (ShawnZR-1)
just curious, when you zr1 guys switch over to reduced power, say if your cruising on the freeway or something, does your gas mileage improve :confused:
Drifting
Joined: Oct 2002
Posts: 1,774
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From: SoCal
Re: "Full Engine Power" light (Wheelman)
Depends on your driving style. The secondaries wont kick in until about 70% throttle. So if you are easy on the pedal you wont notice a difference either way, but if you are on it (70% or more throttle), you will get worse gas mileage if the "FULL POWER" switch is activated as opposed to better gas mileage with "NORMAL POWER" activated. When you are in full power mode, you are running 16 injectors, and when you are in normal power mode you run on only 8 injectors. I definately notice the difference in both modes (gas mileage and Power difference :) ).
Intermediate
Joined: Jun 2007
Posts: 33
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From: Bartlett Tennessee
Well, I hope someone sees this post and can give me some guidance. Recently, the Full Engine Power indicator in the DIC went off. I believe the car defaulted to the Normal Power setting at the same time. I have the thing apart. There are two wires and what seems to be a common post at the switch. When using an ohmmeter I show a dead short between the common post and one lead. Nothing between the other lead and common post. Same on the switch (leads and their connectors removed from the switch). Does this indicate one side of the switch is bad? If so, why do neither Normal Power or Full Power illuminate in the DIC? I'm gonna try to find a switch if not terribly over priced just to see if that fixes it. Thought someone might have experienced a similar issue.
Thanks!
JRZR '90 0071
Thanks!
JRZR '90 0071
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
Well, I hope someone sees this post and can give me some guidance. Recently, the Full Engine Power indicator in the DIC went off. I believe the car defaulted to the Normal Power setting at the same time. I have the thing apart. There are two wires and what seems to be a common post at the switch. When using an ohmmeter I show a dead short between the common post and one lead. Nothing between the other lead and common post. Same on the switch (leads and their connectors removed from the switch). Does this indicate one side of the switch is bad? If so, why do neither Normal Power or Full Power illuminate in the DIC? I'm gonna try to find a switch if not terribly over priced just to see if that fixes it. Thought someone might have experienced a similar issue.
Thanks!
JRZR '90 0071
Thanks!
JRZR '90 0071
However, it is not uncommon for the contacts of that switch to become corroded and therefore become "sketchy" and inadvertently signalling the ECM to revert to NORMAL mode, and the FULL ENGINE POWER light will also go out.
Some take the switch apart and clean the contacts and apply a coating of dielectric grease to prevent further corrosion from forming. And, others solder a jumper across the switch contacts which assures corrosion will never be a factor again; especially in the case were the LT5 is to always be in full power mode.
So, the "bottom line" is, FIRST the switch has to be sending the FULL POWER signal to the ECM, and SECOND there are certain codes that if set the ECM will not activate the secondaries nor the FULL ENGINE POWER light (or LED).
Lastly, this question should be put in the ZR-1 section on this FORUM and/or submitted on the ZR1 NetRegistry FORUM
