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Post by pete1977 on Sept 13, 2017 7:45:24 GMT -5
Yes and yes.
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Post by Stinger on Sept 14, 2017 22:42:13 GMT -5
If the ECU is known good, there are no codes that are atypical, the TPS is reading correctly, and there are no electrical component faults, then there has to be a wiring issue in the ignition system that is preventing the "pulse" signal from being generated.
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Post by pete1977 on Sept 20, 2017 9:28:47 GMT -5
Pull ecm and took covers off. Found areas around c76, c69,c7 and c9 look burnt. Would this be injector circuit?
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Post by Stinger on Sept 20, 2017 13:50:00 GMT -5
I don't know how the stock ECU board is labeled but if anything is burnt, it's junk and needs replaced.
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Post by pete1977 on Oct 17, 2017 19:39:28 GMT -5
Installed new ecm, still no pulse at injectors. Had a test light on the port to read codes. Notice when I had throttle wide open test light would go off. Any idea what would cause this? Also how many red/green signal return wires should be left over? I only have one after removing excess wiring.
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Post by Stinger on Oct 17, 2017 22:47:25 GMT -5
Put a volt meter on the tps so you can see what's happening.
Basically every sensor has a red/green wire since that's the ground (signal return). They all go to one spot in the harness so unless you removed them from that joining location, they should be left over and open in the harness. If you look at a wiring diagram you can see all the signal return wires.
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Post by pete1977 on Oct 18, 2017 6:21:23 GMT -5
Have volt meter on tps throttle closed .9v throttle wide open 4.9v. I removed all of the coil pack wiring, crank sensor plug.
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Post by Stinger on Oct 18, 2017 10:55:30 GMT -5
That's what the tps is supposed to do.
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Post by pete1977 on Oct 18, 2017 17:47:22 GMT -5
Right, but why does the test light go off when you go to wide open throttle and let off? Then go wide open it comes back on?
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Post by Stinger on Oct 18, 2017 22:05:09 GMT -5
I don't know, I've never seen or heard of such a test. Does it light at .9v (throttle closed)? A test light is just a "dumb" version of a volt meter. It tells you if voltage is present and a rough guess of how much (by how bright the light is) but it does nothing else. A volt meter does the same thing but it gives you exact voltage.
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Post by pete1977 on Oct 19, 2017 6:54:54 GMT -5
This is not a test. I had the test light reading codes and was checking voltage on tps when I noticed this.
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Post by Stinger on Oct 27, 2017 23:12:26 GMT -5
All I can say is how the TPS is supposed to act (smoothly go from around 1v to over 4.5v as throttle opens) and have you confirm that yours is doing the same. Beyond that, I have no idea why a test light would go off (other than the obvious "lack of voltage" or "loss of connection") and it honestly doesn't matter for the context of this discussion.
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Post by pete1977 on Nov 8, 2017 8:22:59 GMT -5
OK I finally got this thing running. It runs real good. Now my question is will a manual shift ecm make an automatic not shift?
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Post by Stinger on Nov 8, 2017 14:39:43 GMT -5
Yes, if the automatic you're running is computer controlled. A 3 speed C3 is not computer controlled. A 4 speed overdrive A4LD should shift gears 1-3 and 4th gear is computer controlled, as is converter lockup.
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Post by johnbernauer on Jan 18, 2018 15:12:43 GMT -5
is someone available to help me on here
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