Subject	Symptoms of an inoperative ECU chip???
Posted by	nismo_boost31 on May 06, 2008 at 10:06 PM
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Message	I am just wondering if my JWT chip is taking a crap. My car is running lean anytime the car goes above 3k. After 3k the wideband shows an A/F 14.3 to 15.2 The higher the boost, the leaner it gets. The car idles and runs great excluding the lean part. By the time you reach 12 psi the car starts to stumble, below that it pulls fine. I have spent 3 months going over my car I can’t find anything. It has the proper fuel pressure, switched CAS and MAF, bypassed the AFC, tried a 40% correction on the AFC, resistance on the injectors are within specs, and the MAF voltage and Injector speed (msec) are all within specs according to the manual at idle and 2k. I have checked all connections to injectors and connections to the ECU. So back to my question, what kind of symptoms will a bad Eprom chip show??????
Follow Ups	Symptoms of an inoperative ECU chip??? - nismo_boost31 22:06:07 05/06/08 I'd call JWT and ask for their opinion. When this started - ThunderZ 06:12:49 05/07/08 Spoked to a JWT Tech - nismo_boost31 13:31:46 05/07/08 Wow...I thought you'd get some help from those guys. - ThunderZ 21:38:29 05/07/08 Replaced all fuel related parts, bypassed AFC, even - nismo_boost31 22:45:42 05/07/08 You have a spare chip if you did the JWT deal. Swap in - ThunderZ 09:13:52 05/10/08 Have you checked fuel pressure? (n/m) - Fast300 12:28:20 05/07/08 Fuel pressure is dead on & fuel system is clean (n/m) - nismo_boost31 13:19:30 05/07/08 Usually a Check Engine light - Noncon 19:03:31 05/07/08 Using techtom for injector speed & MAF voltage - nismo_boost31 22:42:38 05/07/08 Re: Using techtom for injector speed & MAF voltage - Noncon 22:10:09 05/08/08 Maybe the JWT chip is not doubling the MAF signal - nismo_boost31 22:51:36 05/07/08 EPROMS do not just go bad unless you touch them with static - Devi13 03:36:15 05/09/08 I have checked everything - nismo_boost31 09:10:56 05/09/08
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