Since we are doing car questions...

Car '97 Crown Vic. Fuel pump went out, replaced, (never again) still ran bad, but ran. Replaced mas airflow sensor, (the one right behind the air filter box) runs much better, but still has a stumble right off idle under load, and if you let off gas abruptly while driving, starts right back up with no problem. Checked bellows, looks ok, no check engine light on, never was, I knew fuel pump was going and it finally left me stranded, but whatever. Just trying to dial this in. The factory clamp disintegrated that holds bellows to mas/airbox housing, I used zip ties for the moment, possible I need the OG clamp to prevent unmetered air getting in at that junction? It's a dealer only item... :/ . When you rev the engine in park from under the hood you hear a quick gasp of air from somewhere, stock sound or a leak somewhere? (never had occasion to rev the engine from under hood and listen before). Thanks for any ideas!

Re: Since we are doing car questions...

Any dust (getting thru that cobbled air filter setup) that insulates the MAF sensor causes probs. Yes, a vacuum leak has to be located. Wrong vacuum pressure causes bad fuel pressure regulation.YouTube should be all over it.

Did you replace fuel filter when you did the pump?

Re: Since we are doing car questions...

This clamp is actually behind the sensor assembly, so unless I get other ideas off the the dealer for a clamp, seems better withe the ties vs just friction fit, just not at a 100%. Did not do filter, but I have solid fuel pressure holds pressure in the rail for weeks, before pump died would not hold for even a day, pretty sure issue is air related, thanks!

Re: Since we are doing car questions...

Do the fuel filter. You may be straining the pump and don't know it.

Easy peasy to do, but keep electric lamps away from under the vehicle and bleed off pressure at rail first.

Re: Since we are doing car questions...

Oooops???? You changed an electric fuel pump and didn't change the filter ???..wow..you just got fired...that is a large no no in my book...has been lots of pumps called bad over not taking the time to change the contaminated fuel filter...you're fired again

Re: Since we are doing car questions...

The fuel filter is under the car, on the driver side, below seating area, near fuel tank, mounted on frame rail in the fuel line. Change it. Its cheap and somewhat easy.

Re: Since we are doing car questions...

Don't care about the filter, tank was replaced a year ago, decent inside. Can't get fired working for yourself! :) Saw it, I guess will try it if the clamp doesn't help, heard from a guy who worked on cabs, that they are pretty much lifetime....but who knows, what kind of connections on it? (edited)

Re: Since we are doing car questions...

> Pops Peds Wrote:

> -------------------------------------------------------

> Oooops???? You changed an electric fuel pump and didn't change the

> filter ???..wow..you just got fired...that is a large no no in my

> book...has been lots of pumps called bad over not taking the time to

> change the contaminated fuel filter...you're fired again

Let him change it first and report back before you shoot straight from the hip DoNoHiO...

Re: Since we are doing car questions...

The egr channel between the intake manifold sections plugs up. Any codes in that direction? Any spark knock issues?

Re: Since we are doing car questions...

Most time if the fuel pump goes out it contaminates the filter and clogs it with particals from the pump. Has nothing to do with how clean the tank is.

Re: Since we are doing car questions...

Blaine- The artist formerly known as Plumber Crack "(OFMC)" /

Oh boy. So much bad info in this thread.

Re: Since we are doing car questions...

Blaine are you saying particals from the pump does not clog the filter?what do you think the black stuff you get out of the filter is when the pump burns out and you change filters

Re: Since we are doing car questions...

Not only that, but a partially or nearly clogged filter might've killed the pump in the first place.

Every 30K, change the filter.

Re: Since we are doing car questions...

Blaine- The artist formerly known as Plumber Crack "(OFMC)" /

@ Stephen

Key to the on position, do NOT turn key to the start position.

Does the check engine light illuminate or illuminate and then go out, or does it not illuminate at all?

Cycle the key off and back on to check again if you feel you may have missed it the first time.

Re: Since we are doing car questions...

Will check that tomorrow, at work now and will let you know. As far as I know I have no codes, not seen the light. Will let you know if I get a light.

Re: Since we are doing car questions...

Check for any pcv hoses turned to goo. I've seen those leaking causing all sorts of fuel trim issues.

Re: Since we are doing car questions...

Thanks, seems intact, but could not hurt to take it out and check inside, maybe spray out the valve as well.

Re: Since we are doing car questions...

Any codes present?

Re: Since we are doing car questions...

Light never been on once, doing what Blaine said tomorrow to be sure....

Re: Since we are doing car questions...

Blaine- The artist formerly known as Plumber Crack "(OFMC)" /

> Stephen Keller Wrote:

> -------------------------------------------------------

> Will check that tomorrow, at work now and will let you know. As far as I

> know I have no codes, not seen the light. Will let you know if I get a

> light.

We just need to verify that the bulb works first before we can claim “no codes”.

Re: Since we are doing car questions...

Blaine- The artist formerly known as Plumber Crack "(OFMC)" /

If the bulb does work, i’m leaning towards an IAC.

Are you saying the intake tube leaks ?

Re: Since we are doing car questions...

> Blaine- The artist formerly known as Plumber Crack "(OFMC)" Wrote:

> -------------------------------------------------------

> > Stephen Keller Wrote:

>

> > -------------------------------------------------------

>

> > Will check that tomorrow, at work now and will let you know. As far as

> I

>

> > know I have no codes, not seen the light. Will let you know if I get a

>

> > light.

>

> We just need to verify that the bulb works first before we can claim “no

> codes”.

Understood.

Re: Since we are doing car questions...

> Blaine- The artist formerly known as Plumber Crack "(OFMC)" Wrote:

> -------------------------------------------------------

> If the bulb does work, i’m leaning towards an IAC.

>

>

>

> Are you saying the intake tube leaks ?

Not sure, factory clamp broke so first tried to just friction seat it, symptoms worse, zip tied it seems tighter, symptoms less severe, this is the clamp by the air filter housing, after mas sensor, will get pic in daylight.

Re: Since we are doing car questions...

Anybody that would put a new fuel pump in and skimp on changing the filter would take a shower and put on the same shit stained skid marked underwear...

Re: Since we are doing car questions...

Moped Lar (OFMC) /

Got brown? Turn’em around!

> Pops Peds Wrote:

> -------------------------------------------------------

> Anybody that would put a new fuel pump in and skimp on changing the

> filter would take a shower and put on the same shit stained skid marked

> underwear...

Re: Since we are doing car questions...

Blaine- The artist formerly known as Plumber Crack "(OFMC)" /

^ lol

Re: Since we are doing car questions...

> Pops Peds Wrote:

> -------------------------------------------------------

> Anybody that would put a new fuel pump in and skimp on changing the

> filter would take a shower and put on the same shit stained skid marked

> underwear...

^Still shitting your pants? Or just start again?

Re: Since we are doing car questions...

Blaine- The artist formerly known as Plumber Crack "(OFMC)" /

My thoughts on fuel filters.

The 70’s are over. Unless i’m working on a carbureted vehicle, “if it ain’t broke”, i’m not touching the fuel filter.

Reasons not to replace a fuel filter:

Many fuel tanks are plastic, so rust in the system isn’t an issue.

The fuel pump in the tank has a fine mesh screen, so the majority of junk never makes it to the filter.

Modern filters are huge. Compared to that stupid little sintered brass turd of a filter in a carburetor, they’re equal to like 30 of those.

Then there’s what i call “snap together/bust apart” technology. More than i care to remember, the “quick connect” fittings fail to release easily because road dirt gets inside and the captive fingers have nowhere to go. After you finally get it apart and back together, you find that you have disturbed shit and now the line is leaking where it was rusted thin. This will always be behind the fuel tank and you’ll need to remove the fuel tank to repair it.

I only replace a fuel filter when it needs one. How do you know it needs one?

It’s just like a moped. it seems to run fine and will sit there and idle all day. But when you put a high demand on it for fuel flow it can’t keep up. It runs great but starts to die near the top of the long hill? BINGO. Fuel restriction.

Replacing a fuel filter isn’t an urgent necessity. You will get plenty of warning that it is becoming restricted and you’ll be able to make it to wherever you need to go to replace it when that time comes.

That being said, I haven’t seen a vehicle in our shop for Quite a few years now that actually “needed” the filter replaced because it wouldn’t make it up a hill.

Re: Since we are doing car questions...

Start with a healthy dose of injector cleaner and checking the strength of the exhaust pulses at the tail pipe. Something is plugged...

Re: Since we are doing car questions...

> Blaine- The artist formerly known as Plumber Crack "(OFMC)" Wrote:

> -------------------------------------------------------

> My thoughts on fuel filters.

>

> The 70’s are over. Unless i’m working on a carbureted vehicle, “if it

> ain’t broke”, i’m not touching the fuel filter.

>

> Reasons not to replace a fuel filter:

>

> Many fuel tanks are plastic, so rust in the system isn’t an issue.

>

> The fuel pump in the tank has a fine mesh screen, so the majority of

> junk never makes it to the filter.

>

> Modern filters are huge. Compared to that stupid little sintered brass

> s turd of a filter in a carburetor, they’re equal to like 30 of those.

>

> Then there’s what i call “snap together/bust apart” technology. More

> e than i care to remember, the “quick connect” fittings fail to release

> easily because road dirt gets inside and the captive fingers have

> nowhere to go. After you finally get it apart and back together, you

> find that you have disturbed shit and now the line is leaking where it

> was rusted thin. This will always be behind the fuel tank and you’ll

> need to remove the fuel tank to repair it.

>

> I only replace a fuel filter when it needs one. How do you know it needs

> one?

>

> It’s just like a moped. it seems to run fine and will sit there and idle

> all day. But when you put a high demand on it for fuel flow it can’t

> keep up. It runs great but starts to die near the top of the long hill?

> BINGO. Fuel restriction.

>

> Replacing a fuel filter isn’t an urgent necessity. You will get plenty

> y of warning that it is becoming restricted and you’ll be able to make

> it to wherever you need to go to replace it when that time comes.

>

> That being said, I haven’t seen a vehicle in our shop for Quite a few

> w years now that actually “needed” the filter replaced because it

> wouldn’t make it up a hill.

If you believe this, I've got some swampland I'll sell you at half-price. I've removed MANY restricted fuel filters from cars today.

The MORE restricted the fuel filter is, the harder the pump must work.

I've only had one fuel filter line that leaked after replacing. Guess WHY?

No one had replaced the fuel filter in years, just like this guy is recommending not to replace them. LOL!

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