Question about Volvo S40
Did you remove the dist. while replacing the head if so you may have dropped the dist back in 1/2 tooth off on the timing and that would cause the engine to back fire. You need to bring #1 piston to the top of the cyl. and then make sure the rotor in the dist is pointing to #1 spark plug wire on the dist. cap and then drop the dist. You may need to turn the oil pump shaft to align the dist before dropping it onto the oil pump shaft. You can do that with a screw driver.
Posted on May 20, 2017
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Posted on Jan 02, 2017
Sounds like you have your timing off. If it is backfiring, that means that 2 of your wires are crossed, causing the plugs to fire on the exhaust stroke versus the compression stroke. Recheck your timing.
Posted on Jun 07, 2009
WELL WHAT YOU NEED TO DO FIRST IS MAKE SURE THAT YOU PUT THE TIMING BELT EXACTLY WERE IT GOES THERE ARE TIMING MARKS IN THE ENGINE IF MAKE SURE THEY ARE WERE THEY NEED TO BE
Posted on Jul 26, 2009
P0340 - Cam Timing
of a mistimed camshaft system (all must apply):
The diagram in the manuals should show the timing marks on both cam gears to be on the blue timing chain links.
Posted on Mar 26, 2011
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