Question about Cars & Trucks
I put a jegs fuel pump on it shows 5psi at idle . would that cause it to back fire at hard acceleration
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Posted on Jan 02, 2017
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!
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Posted on Dec 30, 2008
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
Posted on Mar 13, 2009
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
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
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
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