Subject	Difficult @ times to start: Fuel system related ?
Posted by	Mike@ZSpeed on September 22, 2021 at 10:23 AM
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Message	93 TT 63,000 miles Flex fuel: I run E85 all summer then in the winter 93 w/ stabil. Stored Oct.-May Car has been difficult to start @ times. I will turn it over and it tries and just stops. It can take anywhere from 2-3 attempts. But this AM it took about 6. It tries real hard then just stops. This AM after about the 4th attempt the engine was trying real hard then stopped. Next attempted it fired up. It struggled but it did. You could almost feel the engine trying and it didnt sound to good. If I start it again later that day it usually ( usually is the keyword ) starts up no issues. The car can sit anywhere from 10-14 days without being driven. Tank is never less then 1/2 full. Recently- in last 1,500 miles ( 2020 ) when we did the FF conversion we did: AUS 750 Z32 Fuel rail insulators Nistune FF package, FF sensor, wideband sensor & FF pressure sensor for Nistune. Dyno tune dual MAP NGK's 2667 BKR7EIX Delete: EGR, TB coolant lines Also just replaced battery. Connected to a tender @ all times. I'll try and get a video next time. Fuel related issue? Fuel pump ? Relay ? Faulty injector ? When I turn the key on I don't hear any buzzing coming from the fuel pump. TIA ` 1990 NA 1993 TT
Follow Ups	Difficult @ times to start: Fuel system related ? - Mike@ZSpeed 10:23:20 09/22/21 Are you running the stock FPCU? - platinumist 12:54:44 09/23/21 This - Mike@ZSpeed 16:50:52 09/23/21 FPCU has likely failed. I replied to your email. (n/m) - platinumist 12:08:58 09/24/21 This - Mike@ZSpeed 19:34:31 09/23/21 Deleted your PRVR? (n/m) - FrozTTy 07:48:48 09/25/21 PRVR? (n/m) - Mike@ZSpeed 19:19:46 09/25/21 Pressure Regulator Vacuum Relief - FrozTTy 10:48:47 09/27/21 Update: Interesting - Mike@ZSpeed 08:11:01 09/25/21 Update: Interesting - Mike@ZSpeed 11:05:01 09/25/21
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