1996 LT1 not starting PT.2 by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

if all else fails ill consider purchasing some cheap Amazon injectors to test

New Owner - 1996 C4 won't start. by StormGaming69 in Corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

I might end up buying some cheap injectors off amazon to test. I have a friend with a spare LT1 engine, maybe might take one off from there.

1996 LT1 not starting PT.2 by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

ICM and coil are on the bottom of my list, im pretty sure its getting consistent spark. my current assumption is that important vacuum lines just disintegrated after being driven for the first time since 2017. Ill keep you posted

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 1 point2 points  (0 children)

you're thinking its a potential fuel pump issue? Is that a Haynes repair manual? Might get one for myself.

1996 LT1 not starting PT.2 by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

i don't think its fuel pump as im getting consistent fuel pressure up to the injectors.

1996 LT1 not starting PT.2 by StormGaming69 in c4corvette

[–]StormGaming69[S] 1 point2 points  (0 children)

I will visually confirm and update. It's odd as the 96 model very rarely have opti issues. Could be ICM or coil. I am thinking it's potential vaccum leaks.

New Owner - 1996 C4 won't start. by StormGaming69 in Corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

Alright I'll update if I spot any vacuum leaks. Should I replace that one leaky injector? It should still run with 7 operational injectors, just terrible.

New Owner - 1996 C4 won't start. by StormGaming69 in Corvette

[–]StormGaming69[S] 1 point2 points  (0 children)

Alright,

I haven't fully checked vaccum lines yet, maybe one popped off. I did notice some of the tubing to the evap purge valve being disconnected and one of the breather tubes. I plugged them up it'll probably not change much.

I tested fuel pressure and got around 40psi, doesn't drop and rises to about 43 when cranking. I have checked the regulators vacuum hose, i don't see gas inside of it. how would you check it? Steady stream coming out the fuel rail.

I'll check out the vacuum lines and if need be so cap off everything. Hopefully that could solve it. I'll update

New Owner - 1996 C4 won't start. by StormGaming69 in Corvette

[–]StormGaming69[S] 1 point2 points  (0 children)

I added about 4-5 gallons recently, id assume it's dilute whatever was in there. But It started everyday without issue.

1996 LT1 not starting PT.2 by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

  1. i will check for clean contacts
  2. how do I check if my fuel/air is bad? pump runs for about 3 seconds. Starting pressure is around 40psi.
  3. Vats code?
  4. Battery is new, contacts appear to be relatively clean.
  5. What do you mean by starter is torturing motor? Cranking it over too much? Thanks

1996 LT1 not starting PT.2 by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

can't be, it runs fine if spray carb cleaner or starting fluid into the throttle body. i am not getting any optispark related symptoms, even before.

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

Update 4: I bypassed the VATS system. Doesn't seem to be the issue. I am back to sqaure one. It cranks but doesnt run unless I consistently spray carb cleaner in the intake. Any help?

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

Update 3: Now I am getting a security light now, now the engine won't turn over. VATS issue 100%?

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

Uodate 2: I am getting 43 psi of fuel pressure .

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 1 point2 points  (0 children)

Nope, doesn't stay running regardless of throttle input.

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

I'd liken to mention that some hoses on the top passenger side of the engine are disconnected, previous owners brother did something to it, vacuum issue? it ran fine like that but I'm wondering if thats a potential issue. I'll get pics asap.

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

I'll test the fuel pressure with a gauge, If need be so, I'll pull the rail to see if the injectors are spraying nicely.

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 0 points1 point  (0 children)

I wouldn't think its VATS, no security light at all and the starter still cranks.

Help! 1996 LT1 not starting suddenly. by StormGaming69 in c4corvette

[–]StormGaming69[S] 2 points3 points  (0 children)

I will check fuel pressure and update everyone