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EAT ECU 15 Amp Fuse Problem

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    EAT ECU 15 Amp Fuse Problem

    Ok now the fun begins.

    When I first bought my cb7 it ran great, that is untill one day I go to leave for work and she will crank and turn over, but wouldnt run. She had fire, had a good battery, timing, everything I could think of except fuel. So do a little test and put some gas in the intake tube and sure enough she turned over and ran untill the gas ran out.

    So now tracing the problem with why she wasnt getting fuel. The kicker was that she would only do this intermittenly. So my friends and I drop the tank and throw a new fuel pump in there. Before we dropped the tank however Brandon had mentioned that we might be able to get it from the plate under the back seat, well he wasnt correct but I figured it was worth a shot and unscrewed the plate then low and behold couldnt access the pump. This is important later on down the write up. So the plate goes back on and i am in such a frenzy/hurry that I do sumthing stupid. I'll tell u later on =P

    So the tank is dropped on a rainy, cold night and its half full of gas which was a BITCH to handle, throw the new pump on and give her a test run. Awesome, runs great, no problems....yet. Couple days later BAM same problem as before. Cranking but to no justice. Brandon reccomends we check the Main Fuel Relay under the dash.

    I pull the relay out, take it out of its case and come to find that the solder was old and split, there were burn marks on the circut, ect ect bad relay. I replaced it and then she runs great, but this was after i took it to a shop and had them try and figure out the problem which they lied about and put some ground into my ground wire in the main fuel relay harness. This shop for all u Jacksonville, Florida fans was Bud's Auto Kare....needless to say they are no longer in buisness. Spent money for a 'fixed problem' that was never FIXED by them.

    Moving along, the f22 runs great for about a year or so untill one day I put my key in, turn it to run, and pop. I hear a fuse blow. Great....I find the fuse to be the number 2 u/dash EAT ECU 15 AMP fuse. WTF IS THAT?!?! So now begins research time. Hunting through cb7 I find a small post about a similar problem, turning key, popping fuse. Ends up being the Main Fuel Relay. I again replace the fuse and relay and she runs, problem occurs again.

    So with the off and on problem with the fuse popping and having to warranty relays out, I give up on the f22 thinking it was the engine. Bye-bye f22 hello JDM H22A care of Steve from Hmotorsonline.com

    After the swap, car ran like new...for about 6 months........ After a hard ass day @ work filled with stress, anger, and just wanting to go the hell home, i climb in my cb7, put the key in the ignition,...crank, POP.

    Check the 15 fuse and sure enough its blown. I call Brandon, he heads out to come and help me out. We check out the relay, its fine but its under warranty so we call Advanced Auto Parts girl says that she has the part but the warehouse is closed and cant get it. The closing of the warehouse ended up be a miscommunication so B and I head down there and swap parts. Well being in a rush I dont pay attention to who the part is made by. Put it in, new 15 amp fuse, turn key to run. POP............ RAWRRRRRRRR . I pull the relay out and look at and notice that it is a crimsion relay with a grey housing....and its made by MITSUBA. What is Advanced doing selling OEM honda parts.....we speak with a manager and come to the conclusion that someone pulled a fast one on them took Advanced's relay and swapped it with a bad OEM Honda Main Fuel Relay. We get a new relay and go back to my car, put it in and she fires up and runs

    During this time I was moving into a new apt so the next night I lay my back seat down to put some boxes and stuff in there and move them into my new apt. Brandon helps and we drive to the new apt and unload boxes, then I put my backseat up and we run to the convience store to pick up some drinks. Go to head back to the apt, turn key, POP!!!! WEEEEEEE.....so we finally try to actually trace the problem because I had mentioned about it maybe being the fuel pump. We pull the back seat down and move the carpet/trunk liner to come to find that there are 2 wires pinched inbetween the plate and the body of the car. THIS IS THE STUPID MISTAKE I HAD MENTIONED ABOUT EARLIER. After later finding out the problem I refer to the wiring diagram in the Haynes Manual and trace that the 15 amp number 2 underdash fuse ties into the fuel pump wiring, the wires that had been pinched.

    Being in such a rush when I did my fuel pump, opening the plate, and then screwing it back down I wasnt paying attention to the fuel pump wires sticking out and being pinched. It ended up being that the yellow wire was being rubbed against the frame and grounding out causing the fuse to pop. The two good relays that I had purchased/warrantied hadnt been the problem after all. I am sure the Original relay was bad because when I pulled it out it was burnt and split ect ect and that had originally been my problem but the Fuel pump wire grounding out was the source of this problem.

    So I repair the wire, tuck the loom back under the plate and shes doing good now.

    Moral of the post: Take your time doing work, never rush because when the problem ends up being sumthing that you caused by yourself, you feel like a real ass.

    P.S sorry for such the long post but I felt that the explanations of eveything may help someone who might go through the same problem.

    Thanks in advance for you time taken reading this and any comments you may post Hope this may be able to help someone out.

    #2
    Long posts are fine when they're so well written!


    As I read the story, I could see your mistakes as you made them. Of course, you're telling the story knowing all that. Replacing the main relay before attempting the fuel pump would've solved the problem!

    But hey... you now have a new fuel pump, new main relay, some funky new ground, and an H22!




    Additional moral of the story: Start with the simple solutions FIRST, and work your way up!






    Comment


      #3
      haha the funky new ground was taken out, the dude like ran a wire tap and an eye hook and screwed in into the damn body into the dash, needless to say i took it out. The tap is still there but the eye hook is taped off and tucked to where it cant touch anything.

      THANKS FOR THE COMMENT =P

      Comment


        #4


        Yeah, I've learned the hard way, a couple of times before it really sank in... mechanics don't always know what they're doing. Some do. Some are amazingly intelligent, creative, and careful. Others... no. Gear oil in my transmission, 3 tapped holes to use the Prelude mount for my h22... one of which isn't even used (the transmission is held on by two bolts, I recently discovered)...


        Brandon... not aero from the board here, is it?






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          #5
          nah Brandon doesnt own a cb7 =P umm hes posted on honda-tech a few times usually goes by integ580 ?!?!

          Yeah i have to agree on the comment about mechanics lol. Gear in ur tranny....nice...

          I did my swap by myself..it took forever (2-3 months seems like forever with a wrapped H sitting in a driveway). Brandon and my buddy Dex helped me yank out the f22 and drop the H in, but as far as the auto to manual tensioner, tranny tapping, water and timing belt replacement I did all that myself. Only thing that i didnt quite know how to do was the pinning and wiring of the knock, vtec oil pressure, and the vtec soli. Brandon helped me with the solider and shrink wrapping. Only thing that glitched during the swap was that the old knock sensor on the jdm H broke during shipping and i didnt have time to wait for another one from Hmotors. Had to move outta the place I was at, lease was up. lol. sooo couldnt let the H sit there and it had to be put in. the actual engine pulling, prep, and final drop took about 10 hours cause of rain. Plus getting the shifter cables from underneath the engine XD. I had placed them on the driverside, put the engine in, then was like DAMMIT. had to tilt the H foward and manuver them back over to the tranny. haha. All in all a good swap experience =) it was fun taking apart/out the F with only a 1/4 in drive ratchet set XD...

          Comment


            #6
            It's always more fun with limited tools!

            I didn't do my own swap, and I regret it... I'll be doing some major work on my CA (3rd gen) this spring, and I'm going to begin the process of building a new H22... so I'll get my hands dirty soon enough! These cars are SO easy though...






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