QuestionOk so the fuel pump works we checked it from the connector that is under the dash. Now they think that it is probably the fuel pump relay. This is in the passenger compartment relay fuse box. Now I have looked all over the passenger side and I am not finding this box. I have looked all over the hyundai site and it has been very helpful in showing me where everything is but this part. I can not figure out and would be very grateful if you could help me with this. Thanks again Bernadette
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I have a 99 Hyundai Elantra that just had the fuel pump replaced in it. This started because my car was running and then it cut off. I then started it again and it ran for like 10 seconds then cut off. The last time I tried it it would not turn over.4 people told me that it was my pump so i had it replaced but the car still does the same thing. Is there some sort of switch or something that has to get reset after a new pump is installed? And if not what do you think it could be? I was told that the pump is still not comming on. If you could help with this I would really appreciate it.
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Hi, Bernadette. If your engine will not turn over (this means the engine will not only not start, but also will not crank), then you've almost certainly got an electrical issue. You should check the battery, alternator, and starter. Let me know if this isn't the condition you are describing.
There's no switch that would need to be reset after the fuel pump is replaced.
Since you were told that the fuel pump is not operating, how was that conclusion reached? The four people that said it was the fuel pump-- did they do some diagnosis to reach the conclusion, or were they guessing based on the symptoms? A faulty fuel pump won't prevent the engine from cranking, just from running.
I figure we're probably going to have some follow-ups to this, so it may also be useful for me to know how many miles are on the car as a means of predicting likely failures.
Well the car has 110,000 miles on it. The people that told me this were saying it based on the symptoms. I think that the car is cranking it sounds like it is starting but will not turn over. The guy that put the fuel pump in says that the pump is not running. Apparently he is telling me that he can not hear it go on when he turns the key to the on position. I hope that this information will help you. Thanks again, Bernadette
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110,000 is enough mileage to have a fuel pump problem, and you say the engine cranks, so the fuel pump idea doesn't strike me as being off-base. Lets approach the problem somewhat systematically.
First, does the check engine lamp come on when the ignition key is turned to the "on" position? If not, then we need to diagnose why the computer doesn't power up properly.
If it does, you'll need to do some electrical diagnosis on the fuel pump circuit. It'll help if you have the schematic for the system. You can view/print them at www.hmaservice.com. The site requires registering for a free account and the use of Internet Explorer.
At the fuel pump, check for power and ground at the connector when you attempt to start the vehicle. If you've got power and ground (power on pin 4, yellow/red wire; ground on pin 5, black wire) and the pump doesn't run, then the problem is with the pump assembly. Otherwise, you'll need to backtrack the power or ground circuit to see where the issue is. Could be a loose ground bolt, a cut wire, a malfunctioning fuel pump relay, a faulty ignition switch, or a faulty ECM.
AnswerGreat. You've already made significant progress. I'm glad you've accessed the site. If you haven't found them already, the schematics are located at the ETM (electrical troubleshooting manual) tab. At the bottom of each schematic, there's a link for "Component Location Index." Once there, click on the component you want to see, in this case "Fuel Pump Relay." You then have a picture of where the fuel pump relay is located. As I look at this picture, I see two potential problems.
First, it's difficult to tell where in the car they're showing. So I'll tell you that the passenger compartment relay box is behind the driver's side dash by the ECM.
Second, you'll notice that the fuel pump relay isn't directly numbered in the picture. To tell which one is the fuel pump relay, you need to go back to the schematic and see that the relay connector number is M18. Then you can go to the picture and find M18 and its position in the relay box.
At this point, it's important to determine whether the relay is malfunctioning or whether it's not receiving its proper power and ground signals.
