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SportTrac Discussion
Engine & Drivetrain
New engine, new headaches
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<blockquote data-quote="SportTracMoneyPit" data-source="post: 1049322" data-attributes="member: 78033"><p>Found a second damaged harness with crossed wires. Cut, soldered and fixed, still no change, except the electric fan seems to be working better now.</p><p></p><p>Finished the drive cycle from ecm reset and drove it (running terrible) to the state inspection station and it passed. No codes still.</p><p></p><p>On the way home it finally threw a random misfire in cylinder 3 code. I had taken the mechanic’s word that he put all new plugs in. When I pulled the plugs I found 5 were motorcraft and the last was an autolite. Interesting. Cylinder 3 was fouled badly. I cleaned the MAF and I replaced all 6 with fresh plugs and took it for a test drive.</p><p></p><p>Runs like a top with no hesitation or stumble up through 80mph. Before the plug swap it wouldn’t go above 50 without stumbling and backfiring.</p><p></p><p>I think this was a combination of electrical gremlins from the crossed wires and me not doing my due diligence and taking the mechanic’s word on the plugs. I’ve always been told to start with the basics and this time I overthought it.</p></blockquote><p></p>
[QUOTE="SportTracMoneyPit, post: 1049322, member: 78033"] Found a second damaged harness with crossed wires. Cut, soldered and fixed, still no change, except the electric fan seems to be working better now. Finished the drive cycle from ecm reset and drove it (running terrible) to the state inspection station and it passed. No codes still. On the way home it finally threw a random misfire in cylinder 3 code. I had taken the mechanic’s word that he put all new plugs in. When I pulled the plugs I found 5 were motorcraft and the last was an autolite. Interesting. Cylinder 3 was fouled badly. I cleaned the MAF and I replaced all 6 with fresh plugs and took it for a test drive. Runs like a top with no hesitation or stumble up through 80mph. Before the plug swap it wouldn’t go above 50 without stumbling and backfiring. I think this was a combination of electrical gremlins from the crossed wires and me not doing my due diligence and taking the mechanic’s word on the plugs. I’ve always been told to start with the basics and this time I overthought it. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
New engine, new headaches
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