h54 and h74 codes
Thread Starter
Pro
Joined: Nov 2008
Posts: 616
Likes: 1
From: Cocoa Beach FL
h54 and h74 codes
92 LT1...I got these codes before and they went away after alot of replacng stuff,now my ses light is coming on and givin me the same codes .I have checked the fuel pressure and it is 40lbs and doesnt drop off or die the car is running fine. Any suggestions?
I believe h54 is not enough voltage to fuel pump.I am running an MSD blaster coil,which makes the car idle alot better and makes a great difference in everyway.
The h74 is traction control I beleive so i'm lost on that.
I believe h54 is not enough voltage to fuel pump.I am running an MSD blaster coil,which makes the car idle alot better and makes a great difference in everyway.
The h74 is traction control I beleive so i'm lost on that.
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
92 LT1...I got these codes before and they went away after alot of replacng stuff,now my ses light is coming on and givin me the same codes .I have checked the fuel pressure and it is 40lbs and doesnt drop off or die the car is running fine. Any suggestions?
I believe h54 is not enough voltage to fuel pump.I am running an MSD blaster coil,which makes the car idle alot better and makes a great difference in everyway.
The h74 is traction control I beleive so i'm lost on that.
I believe h54 is not enough voltage to fuel pump.I am running an MSD blaster coil,which makes the car idle alot better and makes a great difference in everyway.
The h74 is traction control I beleive so i'm lost on that.
The pictures below show the diagnostic sequence from the 93 FSM, if they are too small to see PM me and I will attach them to a regular e-mail.
Code 74 is related to the radio. Go to the Audio Forum on this site then check C4 Frequently Asked Questions and look at answer number two.
