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05-29-2016, 01:37 PM | #1 |
Registered User
Join Date: May 2005
Location: Tallahassee Fl
Posts: 773
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Restrictive fuel filter
72 Blazer, in tank wlbro pump, 40 micron inline filter. 5.3 acts as if fuel starving at wide open throttle. Several post indicate 40 micron filter is too restrictive. Thoughts???
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05-29-2016, 04:33 PM | #2 |
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Join Date: Dec 2002
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Re: Restrictive fuel filter
Following !
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05-29-2016, 04:41 PM | #3 |
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Location: Alabama
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Re: Restrictive fuel filter
Can you monitor your fuel pressure at the rails under wot ?
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05-29-2016, 06:23 PM | #4 | |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Restrictive fuel filter
Quote:
2. is the inline filter pre, or post the pump? 3. Have you verified fuel pressure? 40 micron filters can be used, but depending on the fueling requirments and what the pump moves, they may be too small (especially as a pre filter). I use a 100 micron filter AFTER the pump only.
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06-14-2016, 04:47 PM | #5 |
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Join Date: May 2005
Location: Tallahassee Fl
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Re: Restrictive fuel filter
1) Yes on sock, new tank, new pump
2) FIlter post pump 3) fuel pressure verified, increases with vacuum disconected from regulator 5#'s, 58 pounds at idle, does drop 5 or 6 pounds high rev for extended period with no load on engine. |
06-15-2016, 03:16 PM | #6 |
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Location: Pensacola, FL
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Re: Restrictive fuel filter
Factory injectors?
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
06-18-2016, 08:29 AM | #7 |
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Join Date: May 2005
Location: Tallahassee Fl
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Re: Restrictive fuel filter
Yes factory injectors.
Literally act as if you are lifting/matting gas pedal once you get over 2000 rpms. Can run a steady 1500 going down the road. If it were carb is would say low fuel column. |
06-18-2016, 09:15 AM | #8 |
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Join Date: Apr 2005
Location: Pensacola, FL
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Re: Restrictive fuel filter
Any trouble codes? Almost sounds like the engine is in REP mode. Can you scan the injector duty cycle?
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
06-18-2016, 02:40 PM | #9 |
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Join Date: May 2005
Location: Tallahassee Fl
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Re: Restrictive fuel filter
P0500 VSS signal. (Could this trigger rpm limiter??)
Rare P0507- IAC. Rare, cleaned DBC throttle body thoroughly, code seems to be gone |
06-18-2016, 02:54 PM | #10 |
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Join Date: Apr 2005
Location: Pensacola, FL
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Re: Restrictive fuel filter
__________________
Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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