Tons of electrical issues
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Joined: Dec 2007
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Tons of electrical issues
So basically long story short, I popped stock ECU in for state inspection, my speedo calibrator (Modifry yellow jacket) started bugging out after I installed an AEM Serial gauge, I replaced the yellow jacket but it's still having problems even after the serial gauge has been disconnected (still installed but all wires disconnected and flagged off).
Tonight I decide to put my AEM EMS 1052 back in the car to run my custom tune, no problem, I pop that bad boy in, install the modifry ECT driver, hook up the wideband signal to the o2 wire via T-tap and decide to go ahead and hook up the serial gauge again and fire it up.
First problem: ECT driver is blinking 5 times a second and reads full temp bars (overheating) the car has been sitting for over an hour, so I know this isn't possible.
Second problem: Speedo starts randomly cutting out again (it would still do it before, but rarely, and a power cycle of the ECU fixed it)
Third problem: o2 reading on the EMS and the actual o2 reading on the wideband gauge is WAYYY different, like 3 points different
Fourth problem: AemPro doesn't see the EMS as being connected to the computer half the time, I lost connection while driving, restarted AemPro and it's telling me the EMS is offline, the car is still running! wtf??
Fifth problem: I ended up disconnecting the power to the ECT driver and was just going to keep the temp gauge at 1 bar, well somehow while driving the temp gauge jumps to full hot, even with the ECT driver not getting any power. I've never seen this happen and didn't think it was possible, with no signal going to the dash, I've always thought it would just read 1 bar the whole time.
Anyways, I disconnect the computer, and the AFRs get right again (they were idling at like 17.0 because the o2 FB was thinking it was running super rich and was pulling 10% fuel) so I deem it okay to putt it home while keeping an eye on the AFRs the whole time, everything is fine and I make it home.
I get under the dash to take a look at my handywork and not a single connection looks bad, everything is tight, everything is properly grounded, every connection is insulated sufficiently, everything looks entirely okay, yet I'm having a slew of problems. I return all the electronics to stock minus my external wideband for now and everything is working fine again.
I'm ripping out the serial gauge entirely as everything was working hunky dory before I put that thing in, plus I don't have a clue how to work the software and the guide on this site that someone made a while back has no pictures anymore so it's VERY hard to follow if you don't already know what he's talking about.
I know it's a long shot but does anyone have any clue as to why everything is going nuts down there?
Past experiences / stories / suggestions and criticism always welcome
Tonight I decide to put my AEM EMS 1052 back in the car to run my custom tune, no problem, I pop that bad boy in, install the modifry ECT driver, hook up the wideband signal to the o2 wire via T-tap and decide to go ahead and hook up the serial gauge again and fire it up.
First problem: ECT driver is blinking 5 times a second and reads full temp bars (overheating) the car has been sitting for over an hour, so I know this isn't possible.
Second problem: Speedo starts randomly cutting out again (it would still do it before, but rarely, and a power cycle of the ECU fixed it)
Third problem: o2 reading on the EMS and the actual o2 reading on the wideband gauge is WAYYY different, like 3 points different
Fourth problem: AemPro doesn't see the EMS as being connected to the computer half the time, I lost connection while driving, restarted AemPro and it's telling me the EMS is offline, the car is still running! wtf??
Fifth problem: I ended up disconnecting the power to the ECT driver and was just going to keep the temp gauge at 1 bar, well somehow while driving the temp gauge jumps to full hot, even with the ECT driver not getting any power. I've never seen this happen and didn't think it was possible, with no signal going to the dash, I've always thought it would just read 1 bar the whole time.
Anyways, I disconnect the computer, and the AFRs get right again (they were idling at like 17.0 because the o2 FB was thinking it was running super rich and was pulling 10% fuel) so I deem it okay to putt it home while keeping an eye on the AFRs the whole time, everything is fine and I make it home.
I get under the dash to take a look at my handywork and not a single connection looks bad, everything is tight, everything is properly grounded, every connection is insulated sufficiently, everything looks entirely okay, yet I'm having a slew of problems. I return all the electronics to stock minus my external wideband for now and everything is working fine again.
I'm ripping out the serial gauge entirely as everything was working hunky dory before I put that thing in, plus I don't have a clue how to work the software and the guide on this site that someone made a while back has no pictures anymore so it's VERY hard to follow if you don't already know what he's talking about.
I know it's a long shot but does anyone have any clue as to why everything is going nuts down there?
Past experiences / stories / suggestions and criticism always welcome
Joined: Jan 2007
Posts: 373
Likes: 1
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