What are the symptoms of a bad Fuel pump VS a bad Fuel Filter?
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What are the symptoms of a bad Fuel pump VS a bad Fuel Filter?
Well as some of you know. My car has had a stumbling problem (probably for over a yr). It stumbles/bogs down when I accelerate. Anyways, I took it to Lethal today, and the tech took it for a ride, came back went inside the office. I went inside, and they told me it was a bad fuel pump. They said my fuel pressure was at 35(Im assuming they used my tach, not sure how accurate it is). Anyways, while I was there. I started thinking that it could be something as easy as a fuel filter? I've always thought that when a fuel pump went out, that it went totally out. I told them my thoughts, and they said it was 100% the fuel pump. I left my car there, and they're supposed to get it swapped out tomorrow. Its $500+, and just want to feel better about the fuel pump being the problem. So I ask, what are the symptoms of both?
I appreciate the help guys.
Patrick.
I appreciate the help guys.
Patrick.
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have you ever put a filter on it or know if it has had one? should of tried the filter you would be surprised what a dirty filter would cause. I always told customers to try that first if they were unsure of the maintenance history. worst case it does not help but there is not a loss, it is routine maintenance and better to spend $40-60 and it not help then to spend $500 and it not fix the problem.
how does it start in the morning?
how does it start in the morning?
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have you ever put a filter on it or know if it has had one? should of tried the filter you would be surprised what a dirty filter would cause. I always told customers to try that first if they were unsure of the maintenance history. worst case it does not help but there is not a loss, it is routine maintenance and better to spend $40-60 and it not help then to spend $500 and it not fix the problem.
how does it start in the morning?
how does it start in the morning?
It starts in the morning, with no problems at all.
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Ya, unfortunately its at lethal right now. They're supposed to start the fuel pump tomorrow morning. Maybe I'll just get a ride out there early in the morning and have them swap the fuel filter first. I'd prefer to be there when they do it.
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I will just give you an example. Had a customer come in with a little s10 that had like 90k miles on it and ran like complete crap. they said they did not know if anything had been done to the truck but they had never done anything while they owned it. could of been a number of things but with the service history un known take care of cheap maintenance issues first. Needless to say he left and the truck ran great with just a filter.
Are they going to replace the filter when they change the pump?
Are they going to replace the filter when they change the pump?
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When you replace the fuel pump and it goes out again within 5K miles, your fuel filter is probably the cause.
Learned this the hard way. When I was 20 (I'm 40 now), I had about 60K miles on my 1987 Toyota truck when it started acting up. Replaced the fuel pump, and it ran great for another 4-5K miles, then started doing it again. Asked the parts guy when picking up a second fuel pump what else could be causing it. He asked, "When was the last time you changed the fuel filter?". Uh, duh, never. Replaced the filter and the pump, and it ran beautifully until I sold it at 107K miles. That was the only mechanical failure the truck ever had besides normal wear and tear (battery, brakes, clutch).
Learned this the hard way. When I was 20 (I'm 40 now), I had about 60K miles on my 1987 Toyota truck when it started acting up. Replaced the fuel pump, and it ran great for another 4-5K miles, then started doing it again. Asked the parts guy when picking up a second fuel pump what else could be causing it. He asked, "When was the last time you changed the fuel filter?". Uh, duh, never. Replaced the filter and the pump, and it ran beautifully until I sold it at 107K miles. That was the only mechanical failure the truck ever had besides normal wear and tear (battery, brakes, clutch).
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now-a-days whether you go to autozone or o'reillys they sell you a fuel filter with your pump. A bad filter could cause a pump to go out as well. So even if you replace your filter now...the damage has been done to your pump.
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dude it says in your sig you have 433 408. when i did my little 383 the stock pump and injectors were fine at first was good at 433rwhp and 434rwtq. well i had LMR rebuild the top half of the motor(for 500rwhp) it would lean out at 5k with the injectors maxxed (130% duty cycle at 5k) out so i changed to 42 lb. injectors but with 77k on the stock pump they said the pump would probably not keep up with the injectors sure enough car started sputtering intermittantly, so they through a walbro 255 pump and filter and the car has run flawlessly since. so im guessing its wouldn't be a waste of money for you to just do both then youll have a little more comfort not worrying about the motor running out of fuel and burning something up especially on the nitrous.
Last edited by strokerblackhawk; 06-12-2009 at 09:46 AM.
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