1FST-Z

iTrader: (6)

Hey guys,

I've got a situation where it seems as though the fuel is randomly cutting out on me, sometimes resulting in complete shutdown after some hardcore "skipping" and bucking and such. Everyone agree that these are symptoms of a fuel pump on its way out? Also, quick question along the same lines, are SES lights ever triggered by a bad fuel pump? TIA fellaz!

SparkyJJO

iTrader: (11)

SES could be triggered since lack of fuel could cause a lean condition or misfire.

intense3123

Well if you're not getting enough fuel you're gonna misfire. Go to autozone and get the codes checked out for free. Make sure it's related before you spend your money.

1FST-Z

iTrader: (6)

Funny you mention, cuz I did that and the codes thrown are 0172, and 0175. Banks 1 and 2 System Rich....

comments?

1FST-Z

iTrader: (6)

intense3123:

What you think about those "system rich" codes throwin' ?

1FST-Z

iTrader: (6)

anybody?

CRAGER

Good god, how about trying a search next time rather than bumping your thread 1 hour after your last post?


P0172:

http://gearchatter.com/viewtopic9038...78e99edaa46fcf

P0175:

http://gearchatter.com/viewtopic9036...78e99edaa46fcf

Peace,
Craig.

1FST-Z

iTrader: (6)

Crager:

Roger that. But, actually I had read that site a few times over the past week (a result of, in fact, performing a search) and felt that my basic question wasn't exactly answered with specificity...as in "Yes, these codes may be thrown as a result of a faulty fuel pump," or "No, it's likely you have an issue with fuel trims in your tune." Kinda got a situation here where my tuner is gonna make the 3 hour drive to my location this Saturday to check my 3 week old tune for imperfections. Figured I'd save him the trouble if his assumption on a faulty fuel pump was correct before he made the drive; i.e. I didn't plan on dropping the cash on a new pump if unnecessary for certain undisclosed spur-of the-moment financial reasons. Either way you're a cool mod and I often enjoy your smart-*** remarks. So...

CRAGER

I read into those links a little, and I have not been through this trouble myself but....if fuel pump was an issue both banks would be rich/lean. Try swapping the o2's and see if the same codes for the same bank pops up, or if the codes follow your o2's (bad o2's).

Peace,
Craig.

jmilz28

iTrader: (13)

Getting codes checked IS NOT a diagnosis. It's only a step in the process. It's a starting point. Some codes point to fewer potential issues than others. Don't confuse that issue.

A fuel pump problem does not NORMALLY throw codes. It can, but not usually. When fuel pumps go, it's usually suddenly before misfires can register enough to throw misfire codes. On the occasions when the pump does get weak before it dies, you'll see a lean condition at higher RPMs. Overall, pumps rarely throw codes.

A rich code would lead me another direction. Dirty injectors or a clogged fuel filter or bad O2s come to mind. I've seen dirty injectors cause lean AND rich codes.

I'd replace the front O2s, fuel filter, and clean the injectors. You need it for maintenance anyway, so it's not money wasted, and it may well fix the problem. If not, you needed it for maintenance AND you've ruled out some possibilities.

Good luck!

1FST-Z

iTrader: (6)

Thanks for the advice gents, hope I figure it out soon...this "popping the clutch multiple times on the way to work" stuff is getting old QUICK.

1FST-Z

iTrader: (6)

Well guys, problem identified and fixed. The crank position sensor wire was pulled taught up and around the starter, causing the plug to pull itself out when hitting bumps, etc. My tuner and I couldn't believe it! All these fuel system theories we were tossing around were bogus! When we hooked up to HP Tuners, the CPS had actually thrown a code that wasn't picked up during the code pull at AutoZone. We dropped the starter and re-routed the CPS wire and electrical taped the **** outta it, then reflashed the PCM with the tune and let her relearn all over again. She's screamin' like a banshee again!

For people with the following symptoms, check your CPS wire:
Misfiring and/or Misfire SES codes
Random engine shut-off or "bucking" followed by sputtering and then engine kill
Codes 0172 and 0175 thrown

All of these things put together was traced back to that simple plug!

Hilton

iTrader: (36)

Glad it was such an easy fix. So we're all set to install nitrous now or what?

Cry0

I learned from experience that a lot of mechanics QUICKLY jump to fuel pumps being the problem. My would randomly not start when i turned the key then sometimes 4+ turns later it would turn on and run fine. Took it in when i was getting my oil changed and they said oh no pressure in fuel lines, fuel pump is bad, give us 1,000$ to fix it. I was going to school/working fulltime so i was like whatever i need this car to get around do what you have to do. 2 Months later and a lot of being pissed at the mechanics i find out the #*()(*Ing security function in the key stops fuel from pumping and all i needed was a new ignition/key to match. Of course the mechanics to this day claim the pump was "not pumping at full efficiency" and was still a problem.

1FST-Z

iTrader: (6)

Damn that sux dude. I'm just happy I got away "scott-free" with my situation...coulda been a lot worse and involved, like you said, lots of money!

Cry0

Yea its a pain but at the end of the day id rather hear my camaro's v8 turn on when i get in as opposed to a civic 4 banger.

shadowsnkx

iTrader: (5)

I am having a similar error. Fuel pump is humming and I get p0307 cyl 7 misfire. all my wires look ok

Ntimid8r7

iTrader: (9)

change the #7 plug and see what happens. you can not go by the way a wire looks. they can burn or break inside the boot and you will never know it. it is easy enough to get to and the plug is only a couple of bucks.