intake manifold backfire when key switched to ON position
Posted: Wed Jan 18, 2017 2:27 pm
hi guys,
im wondering if anyone might have come across a similar issue to the following....
its a 6G72 2003 YM with about 400000K on it... runs great still, except lately ive been having these backfires from the intake manifold upon switching ign key to ON position!
this happens only after the engine has been off for at least 2hrs
i wouldnt say its a loud bang but its annoying enough that it spits the vacuum hoses off the manifold...
except once i decided to test it while at WOT and baaangggg.. it destroyed my air intake box and chewed up the honey comb at the AFM...
i have already swapped injectors + fuel pressure regulator and tested them first for any leaks to rule out excess fuel as the culprit... but the problem persists...
im just wondering if its normal for all sprk plugs to fire up at ON switch igniting any remaining fumes there.. or is this some electrical fault im facing?
your help is much appreciated as im really running out of guesses here..
cheers
im wondering if anyone might have come across a similar issue to the following....
its a 6G72 2003 YM with about 400000K on it... runs great still, except lately ive been having these backfires from the intake manifold upon switching ign key to ON position!
this happens only after the engine has been off for at least 2hrs
i wouldnt say its a loud bang but its annoying enough that it spits the vacuum hoses off the manifold...
except once i decided to test it while at WOT and baaangggg.. it destroyed my air intake box and chewed up the honey comb at the AFM...
i have already swapped injectors + fuel pressure regulator and tested them first for any leaks to rule out excess fuel as the culprit... but the problem persists...
im just wondering if its normal for all sprk plugs to fire up at ON switch igniting any remaining fumes there.. or is this some electrical fault im facing?
your help is much appreciated as im really running out of guesses here..
cheers