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mdpsEG · 08-20-2008, 05:38 PM

ok got a weird one here.....

my car has a cel on but when the vtec crossover occurs it instantly turns off. as the rpms fall below the crossover point it turns right back on. i have tried to check the codes. when i jump the 2 wire connector under the dash the cel just stays on. it never flashes any codes no matter what i do. i have reset the ecu by unplugging the fuse under the hood and still the same thing. it seems like there may be a grounding issue or something but i dont know??? any ideas on where to look?

t3t4delsol · 08-20-2008, 05:57 PM

humm.. thats a new one. I would say your problem is in your ecu, If you have a buddy that has the same ecu try theres and to see if it solves the problem

mdpsEG · 09-02-2008, 07:24 PM

wanted to post an update on this one...

it turned out to not be in the ecu, as it was doing the same thing with a stock p28. however, it did eventually start throwing a code 22 (vtec pressure switch). found that the plug on it was broken and didnt plug tightly. messed with it, reset the ecu and i have no more codes and no more weird cel. i still cant explain exactly why the cel was turning off when i went into vtec, but i guess it was just a bad connection all along.

08-20-2008, 05:38 PM	#1
mdpsEG Senior Member Join Date: Jun 2008 Location: north palm beach, FL Age: 29 Posts: 880 iTrader: 1 / 100% Ride: JRSC B20/vtec DC, Nissan Xterra SE Rep Power: 43	weird CEL problem ok got a weird one here..... my car has a cel on but when the vtec crossover occurs it instantly turns off. as the rpms fall below the crossover point it turns right back on. i have tried to check the codes. when i jump the 2 wire connector under the dash the cel just stays on. it never flashes any codes no matter what i do. i have reset the ecu by unplugging the fuse under the hood and still the same thing. it seems like there may be a grounding issue or something but i dont know??? any ideas on where to look?

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08-20-2008, 05:57 PM	#2
t3t4delsol Senior Member Join Date: Mar 2008 Location: York, Pa Age: 26 Posts: 652 iTrader: 0 / 0% Ride: 97 del sol si turbo / dd is a 95 eclipse gsx Rep Power: 16	humm.. thats a new one. I would say your problem is in your ecu, If you have a buddy that has the same ecu try theres and to see if it solves the problem

09-02-2008, 07:24 PM	#3
mdpsEG Senior Member Join Date: Jun 2008 Location: north palm beach, FL Age: 29 Posts: 880 iTrader: 1 / 100% Ride: JRSC B20/vtec DC, Nissan Xterra SE Rep Power: 43	wanted to post an update on this one... it turned out to not be in the ecu, as it was doing the same thing with a stock p28. however, it did eventually start throwing a code 22 (vtec pressure switch). found that the plug on it was broken and didnt plug tightly. messed with it, reset the ecu and i have no more codes and no more weird cel. i still cant explain exactly why the cel was turning off when i went into vtec, but i guess it was just a bad connection all along.

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weird CEL problem