Quote:
Originally Posted by lobuck64
Been a while since I have set timing on a tbi I think there's a tan wire you have to unplug it may have a black or white tracer its on right side (pass side) around engine harness just a thought worth checking
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Yep, that's the wire I unplug whenever I check the timing. Drivers side on this truck.
Quote:
Originally Posted by Dead Parrot
My only computerized vehicle is an 2009 Escape. The manual for that mentions Limp Home several times. Where I got the idea. I think there is also a 'open loop' mode if enough of the signals aren't getting to the computer. Like limp home, it is a basic tune for the TBI.
Don't overlook the ability of rodents to make after installation modifications to a wiring harness or rubber tubing.
Might check the ECM specs and see if it is expecting some signals from in cab wiring that might not have made the transfer trip.
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I'll have to do some reading up on the ECM and trace some wires when it warms up a bit end of the week. Driving around this AM it sounds like the spark isn't advancing, going to have to see what modules/sensors control spark advance.
Quote:
Originally Posted by my86lb
Have you checked your MAP SENSOR.
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MAP sensor was replaced June of '17 about 8,500 miles ago. Wouldn't hurt to check again...
Also... doesn't help that when my dad built this truck, they used about 8-10 squares to do it from junk yards. And of course, never kept the original harness and electronics to put back in. TBI from one truck, ECM from another, harness from another etc.