96 lt1 no start with fuel and spark
05-28-2014, 09:15 PM
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96 lt1 no start with fuel and spark I have a 96 lt1. It has set for like 4 years. I tuned it up (flushed all the old gas and gave it an oil change and fuel filter) and it will not start. I checked the fuel rail and was pretty weak so I put a new 255 fuel pump on. Now is shoots out pretty good when I push the Schrader valve in. I haven't put a fuel pressure gauge on I don't want to buy one. I pulled a spark plug and check for spark, it seemed like a pretty good spark. I'm thinking I might pull the fuel rails off and test each injector. I smell gas when I'm cranking on it. The spark plug I pulled was a bit black. If all injectors spray well I guess I'll get a new coil. What should I do? I have read hours on people having this problem. But it always seems to be the opti spark. I'm very hesitant to go there yet. This car was perfect when parked
This car has no modifications and has 150,000 miles thanks for reading and suggestions are appreciated.
This car has no modifications and has 150,000 miles thanks for reading and suggestions are appreciated.
05-28-2014, 09:48 PM
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My LT1 T/A sat for almost 8 years before I got the new motor in. Over time the seals dry up or stiffen to the point where they cause binding in anything that moves. Case and point. I had perfect fuel pressure on cranking with a brand new optispark and the car would barely cough. Changed the Fuel Pressure Regulator, fired right up.
Pull your dipstick. Smell like gasoline? If so, see previous paragraph.
Pull your dipstick. Smell like gasoline? If so, see previous paragraph.
05-31-2014, 09:22 PM
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I scanned it yesterday... Had no codes. I took the icm in to test it..... It was good. I decided it had to be opti spark related. I changed it out put it back together and it fired up instantly.
I hope somebody will read this and it will help them out. What I learned was the opti spark has a optical sensor that reads a rotation disk that tells the injectors to spray. And I learned that the cap and rotor was worn pretty good at 150,000 miles. The spark was decent when the old opti spark was on. The auto parts store replacement of the whole unit with new cap and rotor too was 125.00. Thanks everyone for your help.
I hope somebody will read this and it will help them out. What I learned was the opti spark has a optical sensor that reads a rotation disk that tells the injectors to spray. And I learned that the cap and rotor was worn pretty good at 150,000 miles. The spark was decent when the old opti spark was on. The auto parts store replacement of the whole unit with new cap and rotor too was 125.00. Thanks everyone for your help.