Question about Cars & Trucks

Open Question

454 when you floor it loses power and backfires driveing normal it fine

I put a jegs fuel pump on it shows 5psi at idle . would that cause it to back fire at hard acceleration

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
Bat1956
  • 585 Answers

SOURCE: Hyundai Sante Fe 2001 6 cyl. - no power; idle only

It may take as much as 60 PSI to overcome the fuel pressure regulator. No, you can't blow through it. I suspect you have a fuel starvation issue. It could be a clogged fuel filter. It may more likely be a pressure leak inside the tank. That pressure gauge you mentioned comes highly recommended at this point. There is a flexible line connecting the pump to the metal line in the tank. If it ruptures, you have only minimal pressure, and the vehicle starves for fuel. Using the gauge, turn the ignition on and off a couple of times, (do not start) If the filter is choked, you will still achieve pressure to overcome the regulator. If it never makes that much pressure, then it is the flex or the pump itself. My first experience with this I found the rupture after the third pump! Embarrassing!


If you find my suggestions to be helpful, please share with us some details so that others may benefit from knowing the whole story. Thank you!

Posted on Dec 30, 2008

Ad
  • 1 Answer

SOURCE: 99 Expedition - Stutters and loses power when accelerating

My was doing the same thing, it was an EGR valve and a misfire on the #2 cylinder which required a new spark plug and a coil pack
t

Posted on Mar 13, 2009

  • 93 Answers

SOURCE: Chevy 454 back fire

Ignition timing is set by the computer as long as the distributor pickup point is within reason.

It could be running too lean. One of the TBI injectors may be sticking or not working (wiring or computer problem), or fuel pressure could be low.

Posted on May 21, 2009

  • 11 Answers

SOURCE: 1995 GMC Safari Loses Power when accelerating hard, rough idle

your egr valve might be faulty bring it in to the auto parts to have it check out what your looking for is the 32 code on the OBD II scanner.

Posted on Sep 04, 2009

  • 123 Answers

SOURCE: 1998 Ford F-150 4.2 V6 starts and idles fine ibut bogs when step

i had a van do this same thing to a tee turned out to be a broken key pin in the harmonic balencer causing the timing to ****** replaced balencer and ran like a dream there is a crank sensor grid on the balencer when the key pin broke it trew the timing off

Posted on Jan 14, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What are the signs of needing to replace fuel pump and/or fuel filter?


Use premium gasoline without ethanol, see the difference.

Sep 28, 2015 | Cars & Trucks

1 Answer

1990 ford bronco idles fine when you accelerate the gas loses power and backfires through the intake


Fuel delivery problem, not enough fuel on acceleration could cause backfires. Many things cause backfires, mechanical and electronic. I need more info to give a better diagnosis. Did the problem happen all of a sudden or has the vehicle been running crappy for awhile.

Nov 20, 2013 | Ford Bronco Cars & Trucks

1 Answer

2.5 liter no power


Check for back pressure in the exhaust. A plugged cat will cause the exact symptom you have described.

Feb 07, 2012 | 1987 Jeep Comanche

1 Answer

Fuel pump push rod


I would use something like the fuel pump listed here, this is a good performance fuel pump that will be able to feed that 454 engine, it comes with a fuel pressure regulator and you can either use a fuel gauge to set the fuel pressure or install an in-line fuel gauge near the carburetor to easily check and monitor the fuel pressure, and set the fuel pressure regulator for 7psi of fuel pressure, and any more fuel pressure than that and the fuel could be pushed past the needle and seat inside the carburetor.

http://www.jegs.com/i/JEGS/555/15914/10002/-1

http://www.jegs.com/i/Mr.+Gasket/720/1564/10002/-1

Jun 19, 2010 | 1984 Chevrolet Chevy

2 Answers

Ford 460 loses power then dies. Starts back up. Idles fine.


It sounds like you might have a clogged catalatic converter on the exhaust system.

Apr 23, 2010 | 1999 Ford Super Duty F 450

2 Answers

96 chevy tahoe won't start?


Mine did this with a cap and rotor. I changed it six months prior, but ended up having a faulty cap from Jegs which caused it to backfire. I had crank, spark, fuel, but the cap was crossfiring and wouldn't run.

This cost me a new flexplate, two starters, still a cap and rotor just due to the backfires.

Apr 26, 2009 | 1996 Chevrolet Tahoe

2 Answers

Backfiring and loss of power


'till you do some in depth testing of all systems, I'd place equal weight on every possibility. Make sure you cover the basics like fuel filter etc before getting crazy with it though. Also check cap. rotor, coil and wires. Idle cylinder pressure is different than that encountered when driving. This additional pressure will cause ignition spark to seek a better easier ground,(not the spark plugs where it should be going) causing missing under load.After checking , if you haven't found anything, its time to begin testing fuel pump pressures, modules and controls.
good luck

Feb 10, 2009 | 1994 Jeep Wrangler

3 Answers

Fuel system


fuel strauner inside tank

Jun 23, 2008 | 1992 Cadillac DeVille

1 Answer

1999 Gmc Sierra has no power


Sounds like the fuel supply is inadequate. Check for a plugged fuel filter, or possibly the fuel pump is losing pressure. I had a 93 Chevy V6 that acted the same way, and after checking everything else I replaced the fuel pump, which solved the problem.

Jun 10, 2008 | 1999 GMC Sierra

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

16 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...