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View Full Version : RB25DET Series 1 won't run without greddy emanage!


s13suckadrift
10-30-2014, 05:29 PM
I have a weird problem! I have an rb25det series 1 in a 97 s14. I can't get the car to run the factory ECU with out the E-manage. When I got the car it had a Greddy E-Manage Ultimate with the plug and play harness. With the E-manage unhooked and just the factory RB ecu it will not start and smelled like it was dumping gas. I recently got a z32 ecu and maf with an Enthalpy tune and still same thing but doesn't smell like gas. The ECU was tested on a running car. I checked and I'm not getting spark. Fuel pressure stays around 42psi.

Other than that the car would run and drive with the e-manage setup. The timing was advanced and that's the only way the car would run right. Also sometimes the engine would just randomly die for a minute and then cut back on like nothing ever happened.

ultimateirving
10-31-2014, 09:55 AM
Sounds like you have limited knowledge on the piggybAck function. It probably is wired into the maf signal and is causing an incomplete circuit when you try to "bypass" it.

s13suckadrift
10-31-2014, 12:25 PM
The E-manage came with the jumper harness so none of the OEM harness was touched. MAF wiring is all good. I found out that I have no spark and my ECCS and IGN relays aren't grounding out.