Check Engine Light, How to CLEAR

[MT-2500]

Originally Posted by pjksr1955

MT-2500 I was looking at Autozones website. My truck is suppose to have a Electronic Spark Control which advances or retards the timing. Do you know where it is located on my truck and do you think this could be the problem with my truck backfiring.....thanks, pjksr1955

If you are not getting spark advance yes.
Spark control module is on firewall.
Sorry about firewall make that right side of engine above valve cover sometimes on coil bracket.
But a lot of things can cause it not to work.
Knock senor/sensors or wiring or plugin power feeds.

If advance is not advancing get some good repair info with a code 43 repair flow chart and go threw the repair flow chart.

A factory manual or a all dat online sub will led you threw the check and repair on it.
http://www.alldata.com/products/diy/index.html

Let us know what you find and how it goes.
Good Luck

[MT-2500]

Here is a link that might explain/help.
http://www.troublecodes.net/articles...ndrstd42.shtml

[pjksr1955]

MT-2500 Thanks for all the info. pjksr1955

Originally Posted by MT-2500

Here is a link that might explain/help.
http://www.troublecodes.net/articles...ndrstd42.shtml

[MT-2500]

Originally Posted by pjksr1955

MT-2500 Thanks for all the info. pjksr1955

You are welcome And let us know how it goes.