http://www.avalanwireless.biz/ford-4-2l-industrial-lp-backfiring-ss-tug Just another WordPress weblog Sun, 05 Feb 2012 08:36:23 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://www.avalanwireless.biz/ford-4-2l-industrial-lp-backfiring-ss-tug/comment-page-1#comment-15555 talon699 Sat, 31 Jul 2010 18:44:44 +0000 http://www.avalanwireless.biz/ford-4-2l-industrial-lp-backfiring-ss-tug#comment-15555 Hopefully you put in the proper plugs and heat range for an lpg engine. Also is the timing set for an lpg motor? The plugs are 1-2 heat ranges colder than gas, and the timing should be 2-5 degrees below stock for a gas motor. Is this a dual fuel or straight lpg? Is the ignition module still good? I know the ecu controls the timing but it has to be able to be checked and set somewhat to compensate for operating variables. did you replace the air filter? ( running rich) Hopefully you put in the proper plugs and heat range for an lpg engine. Also is the timing set for an lpg motor? The plugs are 1-2 heat ranges colder than gas, and the timing should be 2-5 degrees below stock for a gas motor. Is this a dual fuel or straight lpg? Is the ignition module still good? I know the ecu controls the timing but it has to be able to be checked and set somewhat to compensate for operating variables. did you replace the air filter? ( running rich)

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