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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

HELP, car wont start

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Old May 17, 2012 | 10:35 AM
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Default HELP, car wont start
We have a 96 z28 that wont start. Car was bought with mods and issues, mods list is long tubes kand n true duels big cam and a stall supposedly 355 unsure of what the cam specs are. Parts that have been replaced relucter wheel, crank sensor, opti, timing chain(timing chain had some slack in it) car did run hard starting would randomly die, would backfire through the exhaust and intake, had fuel fuel in the oil changed the oil and injectors and fuel pressure regulator. After all that it still wont start! Car has spark, injector pulse and fuel pressure. Did check compression in a cylinder had 170 pounds, going to check the rest of the compression tomorrow. Any thoughts or suggestions would be greatly appreciated
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Old May 17, 2012 | 12:02 PM
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did you ever get it to actually start since ive been up there or is it still a no start? I kind of wonder if your new opti isnt on right. The fact that you have gas in the oil is probably from a bad tune or bad piston rings.
isn't 170 a little low?
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Old May 17, 2012 | 12:15 PM
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I'll just add to a Nebraska thread by saying whats up!

Oh and are you sure the opti was put on correctly? And what fuel pressure are you seeing?
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Old May 17, 2012 | 01:00 PM
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Originally Posted by 93M6Formula
I'll just add to a Nebraska thread by saying whats up!

Oh and are you sure the opti was put on correctly? And what fuel pressure are you seeing?
the opti is on right I had it running for a lil bit fuel pressure is about 60 pounds but it does seem to bleed out fairly fast
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Old May 17, 2012 | 01:02 PM
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60 psi is WAY to high... more like upper 30's- mid 40's psi
if the pressure is bleeding out really fast then your regulator is shot.
Last edited by englundjd; May 17, 2012 at 01:08 PM.
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Old May 17, 2012 | 02:52 PM
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it's got a adjustable fuel pressure regulator on it I'll just turn it down a little bit then
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Old May 17, 2012 | 02:53 PM
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the fuel pressure regulator was on a nother project car and iran ride at 60 pounds
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Old May 17, 2012 | 06:47 PM
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yea that 60psi is way up there. If i was you i'd just get a stock one and put on there so its right all the way around...
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Old May 17, 2012 | 10:24 PM
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it had a stock one on it I just put the adjustable one on it
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Old May 18, 2012 | 11:00 AM
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*copy/paste from cz28.com-Injuneer
Stock fuel pressure without the vacuum line should be 43.5psi. Factory specs are 41-47psi.
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Old May 18, 2012 | 11:39 AM
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Originally Posted by sleepy_z
*copy/paste from cz28.com-Injuneer
Stock fuel pressure without the vacuum line should be 43.5psi. Factory specs are 41-47psi.
ok thank
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Old May 22, 2012 | 08:03 AM
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any updates? hopefully you found the problem
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Old May 23, 2012 | 09:02 AM
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Nope still wont start i did take it to a shop and they dont know whats wrong with it now its back home idk ehat to do now
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Old May 23, 2012 | 04:40 PM
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Pull a couple plugs and check their condition. See if they're soaked in gas. If you want pm your number to make things faster.
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Old Jun 23, 2012 | 07:49 PM
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how is the repair shop just gonna tell you they dont know whats wrong? thats crazy, i wish i could help but im only 16 and im new to the trade hopefully ill be an expert by 23. my Formula is how I'm learning, and i get a lot of learning fixing all these small problems! haha
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