Sorry guys, I have searched the forums for an answer to this.
I am fixing a 98 Accord lx V6 3l, for my buddy. It had a fast idle, and would start intermittently. So I checked to see if i heard the fuel pump come on, which I did not. So I went to my local parts store and picked up a fuel main relay. Spent about 10 minutes installed it. I jumped the car(it had been dead for about a month) turned the key and heard the fuel pump turn eight on, and the car turned over, it was choppy for the first few seconds, then went right back to normal with its fast idle. I let the car sit while on for about 15 minutes to charge the battery. I came back out started the car about 5 times after with no trouble. About 2 hours after the last start I took the intake off of the vehicle to block the bottom hole of the throttle body to see if the FITV was the culprit of the fast idle, and the car wouldnt start. it cranked but never would start. I coudnt hear the fuel pump come on.

Do you guys have any other suggestions besides replacing the fuel pump. My first though was to replace the fuel filter until i realized that it is connectied to the fuel pump in the gas tank. This car is beating me up i need help please.
Thanks in advance guys

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1998 Accord lx V6 3l

 

If the fuel pump now does NOT run, I'd go back to the trunk & find the electrical connectors. Check whether the pump wiring is getting power, so you can either blame the pump or blame the wiring. Keep checking fuses cause you might have some wiring worn thru & only occasionally touching ground & blowing fuses.

Does the V-6 even have an FITV? Beginning 1998 the 4-cyl doesn't & the function is built into the newer IACV. Still, I don't think FITV or IACV would prevent it from starting. Certainly they can't prevent the fuelpump from running.

 

Well i know the fit valve would'nt have anything to do with the fuel pump, just my initial thought of the fast idle. I'm unsure if this one has a FITV. What ekse would cause a fast idle like that?

As for the fuel pump, to check if power is getting to and from it, there should be an access panel in the trunk correct?

 

Fast idle could also come from some misguided mechanic trying to use the throttle cable to adjust idle?? I think the base idle adjustment procedure is about the same (I've never owned a V-6) so check that.

I think there's acess to the wiring back there under the trunk floor, but don't remember the details. Mine was a 1998 4-cyl but I never had to mess with fuelpump problems anyway.

 

But that would'nt cause the idle to jump, Would it?

 

Well, I'm guessing here... Honda idle control likes to all be adjusted in a prescribed procedure. Ad-hoc adjustments here & there are more likely to confuse the controller & lead to surging, even after you think you've un-done your changes.

- throttle plate has to close completely (cable goes a bit slack)
- throttlebody cleaned out - no crud around the bore where the throttleplate closes
- car all warmed up completely - all loads (AC & elect) turned OFF
- unplug wiring harness from IACV (nurse throttle to keep from stalling)

- adjust idle-air screw for 550rpm (this is the part where I'm not sure if the V6 wants a different RPM setting)

- turn it off, cool it down cold, reset ECU, plug stuff back in
- start engine without touching gas pedal
- let it warm up completely without touching gas pedal

This last group of 3 items is something you can try all by itself. That forces the ECU to re-learn the idle behavior. If you're lucky that'll work. If not, you go & do the entire thing.

And this all assumes you've already fixed any issues about the fuel pump running.