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Was that our exit?!?
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Discussion Starter #1 (Edited)
UPDATE JRSC BBK SVTF and no fuel in boost up top?!? Drives fine normally.

Hey what's up gang. Car is doing something funky. Drives perfect when not in any boost. But all the sudden when leaving a toll, car falls on its face and wideband goes lean to no reading and the car just falls on its face. Drives fine out of boost. Fuel pump? Already changed the coil once and has a new alternator so thinking its not lack of spark. Belt looks good and is tight so that's not slipping. Figure belt slip would make it go rich.

Gonna change the fuel filter first to see if its clogged out tomorrow. Figure not injectors since it would still get fuel from a couple injectors. Lol no way they would all fail. What else do y'all recommend I check? Should have my OBD 2 to log with torque app hopefully tomorrow. But anything else I should check?

Thanks,

Tim
 

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You have a xcal / predator ? If so do a datalog and see if the fuel psi is falling off

Fuel filter
sock on fuel pump
fuel pump

Are some things that will cause a drop in fuel psi

Tom
 

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Was that our exit?!?
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Discussion Starter #3
No xcal. But torque data logs and gives csv files.
 

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Was that our exit?!?
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Discussion Starter #4
Lol think I found the problem. Three options here, because just did a second gear pull and all was well. Either crappy gas because I just got some more. Car engine being recycled....had it off and sitting for a few. Of fuel filter....all I did was tap it a bunch and it could had a clog loosen up. Money on fuel filter.

-edit....started acting up again. Leaning out, not complete cut off. Hoping fuel filter because I really don't feel like taking it in for a fuel pump. I can do a fuel pressure regulator but that shouldnt be it. But fuel pump...not feeling that job.
 

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RIP 02 SVT 0209
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My powerworks Svt is doing the same, idels
Cool drives ok but when I put my foot down
She goes nowhere and my A/F leans way out
 

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Was that our exit?!?
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Discussion Starter #6
When was the last time you did your fuel filter? Ill have my new one on tomorrow and will let you know if that's the fix. Been a while since I changed mine.
 

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RIP 02 SVT 0209
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its been a while , i have a new one for it already but i been doing other things to
it too so she has been off the road for a bit, CF hood CF hatch CF RS wing
take out back seats and new rims ....and a few other things
 

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RIP 02 SVT 0209
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oh and whats your miles im just under 100k but the PW is only been on for like 3k
im wondering how long the fuel pumps last ?
 

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Was that our exit?!?
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Discussion Starter #9
OK ill let ya know if the filters the trick. I think so since I tapped it and was perfect then got worse again. I don't think our pumps are screwed.
 

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So it goes lean in all gears when in boost but drives fine when in vac?

My Lighting had a bad fuel pump(s) in July of this year. Basically it sputtered at idle and if you feathered the throttle it would about stall. When you let go of the throttle and it came down off rev, it would run normally.

The issue didn't have a slow ramp up. It just suddenly lost all power and almost stalled while going 35mph 25 feet from my driveway lol. I was lucky because it didn't move again until it was on the back of a flatbed. I then paid to tow it to my dealership and the stupid thing was down for 3 weeks while I waiting on parts.

Mine were OEM original pumps that lasted 175,000 miles.


Very interested in how you discover, trace and resolve your issue.
 

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Was that our exit?!?
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Discussion Starter #11
oh and whats your miles im just under 100k but the PW is only been on for like 3k
im wondering how long the fuel pumps last ?
I have 190K on the car and its been boosted since 80K lol. Still original fuel pump, but still thinking its just a badly clogged up fuel filter. Thinking if the pump was going bad and dying, any strain below 5000K in boost would still have some issues. Weird just above 4,500-5,000 when the car fell on its face.

But if the fuels not getting through the filter fast enough when the pumps working hard, and tapping the fuel filter seemed to correc the problem for 30-45 minutes, and when the problem came back it wasnt as bad as before.....thinking its just a filter.

But we will know in a little bit. Going to change the fuel filter probably around 10 and take it for a drive. Should have an update by 11.
 

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You also have a sock (filter) on the fuel pump that are also bad about stopping up

You also have screens in the tops of the Injectors but I would check those till everything else is ruled out

Is there no one you know that has a xcal or predator

Tom
 

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Was that our exit?!?
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Discussion Starter #13
You also have a sock (filter) on the fuel pump that are also bad about stopping up

You also have screens in the tops of the Injectors but I would check those till everything else is ruled out

Is there no one you know that has a xcal or predator

Tom
I wouldn't lose all fuel at the injectors up top end in boost with a screen or two dirty. I'd have the worst luck ever if all four injectors were clogged lol. Either screens on/in the pump or clogged up fuel filter. Start with the cheap fix first...cause I honestly used to change these every 12K or so and its been a while! Could be as long as 20,000 miles since I changed the little [email protected]

And there are other things besides XCals and predators. Waiting for my OBDII reader to come in the mail and then I will log with the new fuel filter and post as attachment.
 

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PARTS HUNTER
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What about the fuel pressure sensor on the fuel rail?
 

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Was that our exit?!?
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Discussion Starter #15
Could be....but figured if that sensor fails, youd get a CEL or some drivability issues. Everything functions perfectly until the Engine needs a ton of fuel.... 9psi and 4500-5000 RPMs. Plus i wacked the filter a few times and it ran great...then cruising again 30 minutes later it started to lean out again. But didnt fall on its face with no fuel like it did when I first noticed the issue. Leaned out into 16 AFR and I got off it. So either filter or pump screens. Changing the filter now...then for sh!ts and giggle fuel system cleaner when the tank gets down to a 1/4 tank to see if it breaks up any crap on the pump screens. Getting quotes on a fuel pump to order and have on the shelf since it is the original pump and has 190,000 miles on it.


UPDATE: Just put in a new fuel filter. Have yet to drive it...but you could physically feel the weight difference in an already light item between the old and new. Also a lot of fuel coming out of the filter...seemed like more than normal from when I changed them every 12K. Definitely gonna take it for a drive in 10-15 minutes after a shower. Fuel Pump sounded normal when allowing it to build pressure. Im gonna drive it 30 miles or so since I am also resetting the ECU. Update yall after 2PM. But wow noticeable weight difference in the filter. Probably went over 20K on this one....what was I thinking.

Any risk on the pump or injectors if I let the gas get low and see if any cleaner will help break up whats on the fuel pump screens into little particles that can pass by?
 

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Was that our exit?!?
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Discussion Starter #16
I think it was the fuel filter. Car drives great up top. Drove about 20 miles. A handful of pulls. Nothing over 12.0 and everything in mid 11s with this cool weather on the wideband. Ill keep ya posted though!
 

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RIP 02 SVT 0209
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Is there no one you know that has a xcal or predator

Tom
i have an Xcal you were workin with me a while ago but
i had the f #cked up SCT live link 6.3 that we could not
get to data log right ..i have the 6.5 now but have not played
with it yet

I think it was the fuel filter. Car drives great up top. Drove about 20 miles. A handful of pulls. Nothing over 12.0 and everything in mid 11s with this cool weather on the wideband. Ill keep ya posted though!
sweet , i been sick all week but as soon as i feel like getting under her
i will put the new one in and see how that goes
 

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RIP 02 SVT 0209
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wondering if u got an update
 

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Was that our exit?!?
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Discussion Starter #19
Drove 125 miles.....no issues since changing the fuel filter lol. I won't drag out that maintenance again haha. Fuel pump is fine. Just the filter that caused the issue.
 

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Was that our exit?!?
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Discussion Starter #20
Sooooo...Update time. Seems the fuel filter being new and clean just bought me a couple months. Because today the car cut out again while on the highway and trying to boost. Hasnt happened since the above post.

Barely made it into the hotel parking lot because now it has started having fuel cut and sputtering around 4000 rpms and no boost.

Perfect time for the fuel pump to crap out...while traveling for work. NOT
 
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