No start condition with 543 code
Thread Starter
|
Junior User
Joined: Jun 2012
Posts: 61
Likes: 0
From: Smithville, TX
No start condition with 543 code
I went out to my van after it had sat for about a week and tried to start it so I could warm it up to pull codes from the EEC with my new code reader. I turned the key on and heard a few relays click, but I didn't hear the fuel pump on the frame run. I tried to start it, but it will not fire. I depressed the schrader valve on the fuel rail test port and got nothing. I tried switching to both tanks, with no luck on either one. It seems before I could hear at least the pump on the frame run when I turned the key on.
When I figured out it wasn't going to start I put my code reader on to preform the KOEO test. The code reader produced a code of 543 which is a Fuel Pump Secondary Circuit Fault. So, to all the great Form minds out there, does this sound more like a fuel pump relay/fuse issue that it just not activating the pump, or do yall think the fuel pump just gave up the ghost? Thanks in advance!
Eric
PS: The van was running well before this with no fuel starvation issues.
When I figured out it wasn't going to start I put my code reader on to preform the KOEO test. The code reader produced a code of 543 which is a Fuel Pump Secondary Circuit Fault. So, to all the great Form minds out there, does this sound more like a fuel pump relay/fuse issue that it just not activating the pump, or do yall think the fuel pump just gave up the ghost? Thanks in advance!
Eric
PS: The van was running well before this with no fuel starvation issues.
Thread Starter
|
Junior User
Joined: Jun 2012
Posts: 61
Likes: 0
From: Smithville, TX
Figured it out! I replaced the fuel pump relay on the passengers side fender by the EEC port as I did not hear it clicking. I changed the relay and it works like it should. Just wanted to post the resolution. It failing may be in part to me leaving the hood up and an un expected rainstorm moving through over night. Oops!
Elder User
Joined: Jan 2011
Posts: 884
Likes: 0
From: Rockport, IN
I am having similar problems with my van. So far I have replaced the fuel filter, which had very restricted flow. While trying to figure out what the problem is, the solenoid decided to crap out too. When it rains it pours. lol Gonna replace the solenoid and the relay tomorrow. I am keeping my fingers crossed. You finding out that the relay was the problem has given me hope that that is all that is wrong with mine. Glad you got the bandvan running again.
Thread Starter
|
Junior User
Joined: Jun 2012
Posts: 61
Likes: 0
From: Smithville, TX
Yeah, go ahead and change that relay for sure. It can't hurt, plus mine was almost corroded in the socket!
Now that I have the 543 code cleared up, While doing a KOER test, I'm getting a 411 (Cannot control RPM during KOER low RPM check), and a 412 (Cannot control RPM during KOER high RPM check). This van doesn't have a tach. Do these codes mean that the comuter is seeing no RPM's? These are the only codes I'm getting. The KOEO test is a 111 all clear code. Will this effect the way the engine runs? I just don't know what action I need to take. Thanks
Eric
Now that I have the 543 code cleared up, While doing a KOER test, I'm getting a 411 (Cannot control RPM during KOER low RPM check), and a 412 (Cannot control RPM during KOER high RPM check). This van doesn't have a tach. Do these codes mean that the comuter is seeing no RPM's? These are the only codes I'm getting. The KOEO test is a 111 all clear code. Will this effect the way the engine runs? I just don't know what action I need to take. Thanks
Eric
Elder User
Joined: Jan 2011
Posts: 884
Likes: 0
From: Rockport, IN
B, I am not sure what you can do about that code. Maybe you can find out in the Haynes or Chilton manuals they sell at auto parts stores. I don't have one for my van because this is the first time I've had this kind of problem with it. If I do keep the van, I definitely plan on buying one of those manuals though. These computer controlled engines are a bear to figure out. I am sure someone will come along here who can explain what those codes mean to you. Did you look up the proper procedure for running the code tests? I know there's more to them than just hooking a reader up to the port. The tests have to be done in a certain order and at one point you have to get the RPMs up by giving it gas.
Senior User
Joined: Sep 2011
Posts: 474
Likes: 1
411-412 is Fords code for (somethings wrong)...IAC motor sticking, vacuum leak, Air Pump valve sticking, Throttle plate or linkage sticking, anything that effects engine idle and the computer can't make up for it........... mostly a gunked up or rusty thing, maybe even missing or blocked off parts. Good Luck !!!
Thread Starter
|
Junior User
Joined: Jun 2012
Posts: 61
Likes: 0
From: Smithville, TX
411-412 is Fords code for (somethings wrong)...IAC motor sticking, vacuum leak, Air Pump valve sticking, Throttle plate or linkage sticking, anything that effects engine idle and the computer can't make up for it........... mostly a gunked up or rusty thing, maybe even missing or blocked off parts. Good Luck !!!
Thread
Thread Starter
Forum
Replies
Last Post
Fungus232
1987 - 1996 F150 & Larger F-Series Trucks
21
Aug 19, 2022 02:17 PM
treeguy39040
1987 - 1996 F150 & Larger F-Series Trucks
5
Apr 19, 2019 10:36 AM
anthonym92
1987 - 1996 F150 & Larger F-Series Trucks
2
May 11, 2017 03:14 PM
Ford88truck
1987 - 1996 F150 & Larger F-Series Trucks
1
Mar 17, 2008 12:33 AM
