Will leaving the white/red fuel pump wire from the ECU disconnected cause a CEL. It's only on when the engine's running and won't save so I can't check it with my scantool. If I attached a relay to it and ran that through a resistor to ground would that work in removing the CEL? Anyone else with this problem or do we keep CEL's like a badge of honor?
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#415, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 0
I keep my CEL light bulb laying in my center console like a trophy wife. damn, all this stuff and you don't have a CEL? *shows light* bwah-hahahahaha. Jon
#416, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 0
Originally posted by Keith2172 Will leaving the white/red fuel pump wire from the ECU disconnected cause a CEL. It's only on when the engine's running and won't save so I can't check it with my scantool. If I attached a relay to it and ran that through a resistor to ground would that work in removing the CEL? Anyone else with this problem or do we keep CEL's like a badge of honor?
If you want you can leave the fuel pump under the control of the stock pcm, this will have no ill effects. Just makes it harder to troubleshoot and test the MS.
#419, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 2
But for sure leaving it disconnected like this will cause a CEL? Thanks for input, I'm considering hooking it to a resistor then to ground, try to trick it, I just don't know if that will hurt the PCM or something. I'd rather have the MegaSquirt control the fuel pump, I paid for a fuel management computer so I might as well make it manage the fuel
Representing the Central Cali chapter of 2GNT! (I think I'm the only member )
#420, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 3
You're going to end up with CEL's regardless. 1 for each injector, 1 for the injector circuit. Ignore it.
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#429, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 5 Mar-01-05 04:59 AM by Keith2172
I have no CEL in regard to the injectors, Im running big ass resistors I'll try to take a picture of what I've done with the resistor pack I made. Would running the fuel pump wire to ground hurt the PCM? What exaclty does the White/red wire do, activate a relay or power the pump directly (the latter seems unlikely to me)? If I can trick the comp on that I'll be CELless, YaY!
Representing the Central Cali chapter of 2GNT! (I think I'm the only member )
#438, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 6
Originally posted by Keith2172 I have no CEL in regard to the injectors, Im running big ass resistors I'll try to take a picture of what I've done with the resistor pack I made. Would running the fuel pump wire to ground hurt the PCM? What exaclty does the White/red wire do, activate a relay or power the pump directly (the latter seems unlikely to me)? If I can trick the comp on that I'll be CELless, YaY!
The red/white wire gets grounded from the ECU to switch on the fuel pump relay. If you want the MS to turn the relay on, just cut the wire at the relay or ECU, and cap the ECU side of the wire off. DO NOT ground the ECU side of the red/white. I'm probably just going to leave that alone, and let the ECU switch on the pump..just one less wire to hook up I guess..
13.5 @108 MPH-2.2 60ft(stupid FWD!) S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential fuel injection) My webpage: http://eclipsed4evr.home.comcast.net -1998 Mitsubishi Eclipse RS-T- "Toy" -1992 Plymouth Laser Turbo AWD(SOLD) -2000 Honda CR-V(daily)
#441, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 6 Mar-06-05 04:20 PM by ner947
I left my stock injectors hooked up through the stock harness, they're tucked away in the engine bay. Also, I have one of those coil pack loads that goes with my DIS-2, so if I leave that hooked up and have the MS do ignition, the ECU won't know the difference.
In theory, if the AFR is tuned properly and the spark table is good (no misfiring) the ECU would never notice and you would never get a check engine light.
#462, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 10
I just like to throw this in here since every one is talking about CEL. My question is on the Smog test. By clearing the cell right before a smog test how long would it take for the ECU to figure out that something is missing like an EGR as an example?
#467, "RE: Megasquirt question re:fuel pump wire" In response to Reply # 12
Up to 100 miles. You can't pass an OBD-II test during that time period though. They will tell you to come back when the ECU has performed all of it's tests.
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