Fuel pump relay clicking on & off....why?
 

After doing some tunning, I noticed that the fuel pump relay was clicking on & off. Why would it do that? Eveything is wired right. I would guess that the MT's 12 volt lead (12 gauge) to the relay is the reason. I thnik I read someplace about other guys having probs with this.


Please fill me in

Wow, thanks for the help.

I fixed it.

how did you fix it? mine clicks too.

I'm interested as well, how did you fix it?

-Trent

if you're having problems with componants turning on and off unexpectedly it's time to get out you DMM. if you don't have one then you better get one, knowing how to use a multimeter is CRUCIAL in diagnosing custom EFI work like this. and as we all remember from GI Joe - Knowing is half the battle!

get your DMM out and start probing the suspected componant and it's related system. check the relay power supply for continuity while it's running and the problem is occuring. check the ground for continuity in the same manner. what you need to do is isolate the source of the interuption in power instead of just defaulting to the experience of others - diagnostic and investigative skills come in VERY handy when chasing electrical gremlins. these aren't skills you need an electrical engineering degree for either. 12v DC power systems aren't much more complicated than the plumbing in your house when you get down to the basics. find the interuption or restriction and you've isolated the problem.

one thing i hate seeing is someone trying to fix an electrical problem that they percieve to be the same as someone else's by implimenting that person's "fix" to their unique situation. this is a horrible way to try and fix a problem - more often than not you will be left frustrated because your list of "fixes" didn't work.

Ray

if you need help in learning how to use a DMM feel free to ask me!

I see your point. BUt the reason you ask for someone elses remedy to the problem is because that way you can compare and see if you made the same mistake. Which eliminates the whole process of which you mentioned. Most of the time its a common mistake, and when someone catches it, they infact caught the mistake made by other people. Im sorry if it doesnt make sense, its early and I havent slept shit....

you post made perfect sense but the reasoning behind it is completely flawed in my opinion.

the point of my post was that individuals with custom work like a standalone EMS should at least be able to troubleshoot the basic componants that are involved.

i'll be honest - at first i tried to get by on just implementing other people's fixes on my own car. the problem i ran in to was that not very many people were a solid source of information beyond their singular experiences. i've been down that road, it's a long road and there isn't much to see - frustrating and boring.

when i began to follow diagnostic standards and routines is when i noticed a SHARP decline in both down-time and frustration levels.


doublechecking oneself against the experience of others is quite another matter but in no way should be used as a crutch to lean on when diagnostic skills are weak.

Ray

Like I said before, I understand your statement. and sure enoughyou are rigght. You shouldnt do a mod on your car, unless you have a specific shop you rely on, or you fully understand what and how the mod will affect your car. And you must have an understanding of the mod itself.. Im sure I would be able to trouble shoot a rely cliking, shit if its cliking then its either a ground or power causing it. Whether its not grounded right or the power source is faulty or not connected properly. But if its something like a common mistake, and someone has already tackled it, then you dont have to do troubleshooting. Thats what I was trying to get at..