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Fuel pump issue maybe 93 Civic DX AT
On Sun, 01 Jul 2012 16:17:30 -0400, John M. >
wrote: >On Fri, 15 Jun 2012 17:40:28 -0700, jim beam > wrote: > >>On 06/15/2012 09:27 AM, John M. wrote: >>> Hi all, >>> >>> My car has about 375,000 mile on it. Around 200 the relay was >>> resoldered and it worked fine. Somewhere around 300 (very loose >>> estimate) it started acting up again so I bought and installed an >>> aftermarket relay. Around this same time I had to replace the fuel >>> pump (which gave me plenty of warning of imminent failure). >>> >>> Just recently it started acting up again but it's a little different >>> this time. One day after work about a month ago (Florida = warm >>> weather), with the car parked outside, it wouldn't start after a try >>> or two. Then on the third it did. This wasn't a 10 minute wait but >>> only a few. It happened again a few times within the next week. Once >>> while I was getting ready to go to work it happened. >>> >>> I resoldered the aftermarket relay and it was still acting up. I >>> still had the original relay so I tried resoldering and installing >>> it......still acting up. I then (foolishly?) bought and installed a >>> new pump. Damn! >>> >>> Sometimes it fails and then on the 'next' crank it start rights up. >>> Other times I turn the key, I don't hear the pump, and after a few >>> seconds without touching the key I do hear it and it will then start. >>> Right now it's in a no start mode and I'm hoping it will start soon. >>> >>> So, I've done a little reading in my archives of this newsgroup and >>> have come to two possibilities. The ground for the fuel pump or maybe >>> the ignition switch. Just to note: Once started it does not stall (so >>> far). >>> >>> Upon further reading on the web as I write this: maybe the ecu? >>> >>> Any other ideas? >> >>sure - in addition to the ignition switch, there's a switch on the >>transmission gear selector. these things are terrible for gumming up >>over time and poor contact being made. remove, clean off with solvent, >>then re-grease and reassemble. >> >>but also check the ignition switch. if your keyring has a bunch of junk >>on it, it can hold the key cylinder slightly out of position and affect >>the electrical contacts, particularly if this has been going on for a while. >> >> >>> >>> Also, I just threw my back out and can't do a lot of digging around. >>> Does anybody know where the ground for the pump is on this particular >>> year? >> >>there's a bunch of grounds for this circuit. the one for the pump is >>visible when you take the rear seat out. the ones near the relay are >>under the dash. >> >> >>> (Upon further reading I think it's on the thermostat housing - >>> cleaned and still no start) >>> >>> I hope I haven't left anything out. >>> >>> >>> Thanks, >>> >>> John M. >> >>get a meter and watch what happens to the electrical input to the pump >>when switched and relayed. work back from there. >> >>but check out the transmission selector and ignition switches too. it's >>worth working on both of them because they get gummed up at around your >>age of vehicle anyway. > > >This sort of a test. I've tried to comment in this thread a couple of >times to no avail. > >FWIW, my back got worse and I'm still working on a recovery. I'll get >back when I can perform the work suggested. After all this time...finally an update. I continued to have back problems so never got into any heavy wiring diagnostics. One time I did do something to the ignition switch, can't remember what and it seemed to work okay after that. All the while it would start but before that I had to wait maybe about 5 seconds until the pump started. Now the point is moot because, after driving that car for almost 20 years, it got stolen Nov. 10. Now I have a 2005 Element. -- John M. |
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