fuel

  1. G

    Suburban tank dripping during operation

    Hi all, first post on the forum. My new to me 1996 C1500 Suburban is dripping fuel from the passenger side of the fuel tank. It is only dripping when running. It looks like it is coming from a small tube/opening not connected to anything (picture below). It’s probably 1 drip ever 5-10seconds...
  2. O

    hesitation and pops when full throttle

    I own a 1998 C1500 with a 305 and a 4L60E. The truck has short tube headers and a full exhaust. I’ve noticed that during normal driving, it runs fine with no pops or hesitation. However, when I go past 70-80% throttle, the truck pops, hesitates, and usually falls on its face. Sometimes, though...
  3. TbiLover

    No fuel when starting warm.

    super weird issue with my 350, after sitting for days at a time it will start no issue. however when it has been started it will not start until it has sat for multiple days. it seems it can only be started when it is super cold. when it runs no issues whatsoever. but after you shut it off and...
  4. Kris_96_57_350

    new injectors for 5.7 Vortec 96

    I was wondering if these injectors would work in my 5.7 vortec 350 I’ve replaced my fuel pump, battery, alternator, spark plug and spark plug lines and I still have to give it gas to start it sometimes so its gotta be my injectors since its not my starter since sometimes it turns on immediately...
  5. H

    1992 Chevy TBI fuel pressure regulator. Is it modified, or is it stock?

    My 1992 Chevy TBI unit has different fuel pressure regulator and TPS designs from my 1994 Chevy TBI. Throttle position sensor has the larger and older style 3 pin connector (probably better built as well), and the fuel pressure regulator seems to be different. The TBI unit has certainly been...
  6. H

    What size fuel line and fittings does my 1994 Chevy C1500 have?

    Need to know both fuel inlet and return sizes, the size for the fuel filter inlet and outlet, and TBI base fuel adapter sizes. Going to be replacing the lines at the front of the truck, due to considerable corrosion. Gonna get AN fittings so I can run stainless braided fuel lines over the intake...
  7. Blue94Burb

    7.4 TBI Loses Power Past 1/4 throttle and wont rev past 3k

    1994 Suburban 7.4 loses power past 1/4-1/2 throttle, and won't rev past 3k rpm. Fuel filter is new, with air cleaner off it looks like once it revs to 3k the injectors stop spraying. Haven't put a fuel pressure gauge on it yet, and it idles fine. Any help or ideas are appreciated.
  8. P

    Random miss fire

    (I did search for my issue and to no avail did I find it) So I have a 98 5.7 it had a miss fire and was idling rough thought it was the fuel injectors . I did the EGR valve, fuel injectors(oem spider), manifold gasket, canister purge valve, Evap lines, cap and rotor, plugs twice, spark plugs...
  9. greenz97

    97 k1500 5.7 low fuel pressure

    when the truck is cold it stumbles and fuel pressure is at 52 psi also throwing lean codes on both banks i put a new fuel pump and cleaned all sediment out the tank new fuel filter pressure regulator was replaced about a year ago. still has the stutter under cold and still has lean codes...
  10. hilly101111111

    Rough Idle, hesitation and bucks

    I have a 1990 GMC k2500 5.7/turbo 400 trans. It always had a rough idle and when I drive 50mph - 65mph it kinda bucks and skips and it'll be flat when it happens and I have my foot on the pedal like 1/4 of the way. The truck had a ton of new parts on it including a fuel tank sending unit pump...
  11. 1

    454 SS dies randomly, no codes

    I’ve got a 1990 454 SS Pickup with 114000 miles. This is the most unreliable vehicle I have ever owned. The main reason I am making this post is because the truck always dies for no apparent reason, and then proceeds to no-start for a duration of at least 20 minutes (give or take). The ECM never...
  12. Nick88

    Gas Mileage

    With these trucks, gas mileage is not a strong suit, although, fuel economy can be increased for relatively cheap and especially with the price of gas, will save you a lot of money. I did some mods to my truck which helped my 350 TBI in a 1988 square body Blazer get in the 20s cruising on the...
  13. K

    Help with rough startup, and randomly dies on a rare occasion from sputtering too much. 98 sierra 4x4 5.7l vortec

    This one is a pretty wonky one but suits me and my luck being (atleast most likely) something with fuel. The truck honestly drives great 90% of the time and being on the edge of hitting 500,000km. But when I go to start it up every single time it will sit there trying to start and alot of the...
  14. Astro

    Fuel tank question.

    Hey all, was thinking of upgrading to the 98+ style fuel pump on my 96 because offroading and fuel cavitation is no bueno. Had a problem with that going down a bouncy steep decline over the weekend Has anyone done that here? Can I use my 96 fuel tank? What all would I need to change? I checked...
  15. V

    Runs then when it sits a idle eventually it’s loses spark

    So the truck has a different motor in it now it is a 350 vortec still just came out of another truck that had no issue. It now will only runs for about 20 mins from cold to idle temp and starts backfiring really bad and eventually dies seems like low spark the only differences is has open...
  16. R

    454 low fuel pressure

    I have a 1999 7.4 vortec with both banks throwing lean codes. Bank 1 is just slightly above 10% sometimes but bank 2 is consistently 25%. Vacuum tested good @18. New fuel pump, filter, regulator and injectors. Fuel system harness was replaced in ‘21 and I’m still getting less pressure than I’d...
  17. DontPressureMe

    speedometer and fuel gauge not working (moon gauge)

    1988 chevy k2500 5.7 v8 as the title says, my speedometer and fuel gauge stopped working. ive already replaced the fuelpump, which came with the sending unit. whatelse could i look at? i bought another cluster and swapped the parts around and put in the new cluster all together. it continues to...
    • DontPressureMe
    • Thread
    • 1988 chevy broken fuel fuel gauge fuel meter moon gauges speedometer
    • Replies: 10
    • Forum: Electronics
  18. A

    Dropping fuel pressure during a pull

    Alright, hopefully a relatively simple issue. I’ve got a 95 gmc with a lq9 and some bolt ons, 706 heads, and Texas speed cam. For the fueling it has a quantum 255 in the stock sending unit, -6an lines to a c5 vette filter/regulator, and 50 lb injectors. I’ll be doing a pull and I’ll hit around...
  19. AyyeItsGrizzly

    Fuel Tank Replacement

    Hello everyone, I have a 99 Tahoe 4 door 4 wheel drive. So I replaced my fuel pump about 9 months ago and found out that the original owners broke the locking bracket on the tank so they wood screwed the fuel pump down. My question today is I can’t find the fuel pump for my truck anywhere can...
  20. M

    1988 GMC K1500 Fuel Pump Relay Wiring -- Need Urgent Help

    So, I got this 1988 GMC Sierra SLX a year and a half ago, the original engine's oil pump got clogged up with some kind of silver flakes, radiator exploded, dropped a new engine in it, in the process of getting it dialed in and timed, a buddy advanced the timing way too far after I switched the...
  21. G

    Cheap fuel setup lm7 swap in 91' rcss

    I bought a brand new 96+ Vortec fuel pump and swapped it in from the weak tbi pump. I've done a lot of research on how to go from the stock fuel hard lines to the quick connects on my intake (with return). But with all an fittings added up I'm looking at $90+ just in fittings to go from the...
  22. Raspi454

    Fuel line replacement?

    99 tahoe 350 4 door 4x4 So my fuel lines are all rusted out, leaking fuel, and while I was at the parts store, the guy said he couldn't find a replacement. I came across this website >Fuel Lines< and was wondering if it's any good. They have various sets like pump to filter, filter to engine...
  23. Crankshaft Brad

    Front Half Fuel Line Replacement

    After my truck has been sitting for two years, because the engine was blown up, I finally got my truck running once again! bad news is that my front fuel lines are toast. I have fuel everywhere except in the throttle body... I can find the rear section of the fuel lines, but nobody has the front...
  24. CBenZ71

    At a loss with Fuel Gauge

    Hey everyone, I am stuck trying to fix my fuel gauge in my '99 K2500 7.4l. Background: It has a slight hummingbird issue with it, but more important it only reads 3/4 at full. This has happened recently because it used to go to full. Last weekend I dropped the tank and replaced the pump and...
    • CBenZ71
    • Thread
    • electrical fuel gauge instruments
    • Replies: 5
    • Forum: Electronics
  25. R

    What in tank fuel pump should I use in 5.3 ls swap

    I have a 97 k1500 work a 5.3 with all the factory cpu and fuel injection..it has the stock in tank pump for the 5.7 vortec still in it..the truck starts and runs fine till it warms up then it stays back firing and I think it's because the fuel pump isn't getting the correct amount of fuel and...

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