LT1 newbie help me with this Demon possessed car
07-26-2010, 09:45 PM
#1
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LT1 newbie help me with this Demon possessed car All right here we go.
I just bought a 95 LT1 383 stroker with a D1SC procharger ,
the car has been sitting dead for about 3 years .
I have swapped out the opti for a known good piece ,
I have spark at the coil,plugs and injector pulse.
fuel pressure starts at 42PSI , but drop fast as soon as the pump stops running ...down to 20 PSI in about 30 seconds or so,
I have a couple of ideals on this ..could the check valve in the pump be gummed up from 3 year old gas ??
can i disassemble it and clean it ??
it trys to hit ,,but im going to drain the tank and add some fresh premium and a couple cans of injecror cleaner ..anything im missing ??
thanks for your help..Dave.
I just bought a 95 LT1 383 stroker with a D1SC procharger ,
the car has been sitting dead for about 3 years .
I have swapped out the opti for a known good piece ,
I have spark at the coil,plugs and injector pulse.
fuel pressure starts at 42PSI , but drop fast as soon as the pump stops running ...down to 20 PSI in about 30 seconds or so,
I have a couple of ideals on this ..could the check valve in the pump be gummed up from 3 year old gas ??
can i disassemble it and clean it ??
it trys to hit ,,but im going to drain the tank and add some fresh premium and a couple cans of injecror cleaner ..anything im missing ??
thanks for your help..Dave.
07-26-2010, 09:53 PM
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The starting pressure seems fine. Once you get the engine going though I think the pressure should go higher rather than lower, to 43-49psi off the top of my head. Have you checked for a cracked/damaged injector?
07-27-2010, 07:05 AM
#7
+1 - That is why you are seeing the pressure bleed off after shutdown. Also, pull the fuel rail (with injectors and fuel lines attached) and turn the ignition to position #1 (DON'T START IT) to pressurize the pump and see if any of your injectors are leaking.
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07-27-2010, 09:39 PM
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no it hasnt even started yet ...but it does hit ..gonna drain the tank ,,and fill it up with some premium tommorrow ...I figure the gas is 3 years old ...i will keep you guys up to date as she progresses ...went from never having a 4th gen ...to buying 2 in less than 4 monthes ..lol..heres a couple of pics of both ..the blue car is the LT1..the orange car is getting a 555 BBC and a little sauce ...
07-28-2010, 06:06 PM
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ok little update ...was raining cats and dogs ..so i didnt drain the tank ...but I did get her to fire up and run ...idles a little rough ..but seems to rev OK ...gonna do a full tune up ..drain the tank change the oil and put the front back together ...thanks for the help and advice ...
Saw something like that on a Honda the other day and it looked damn good!
07-28-2010, 07:49 PM
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Thanks for the compliments ...I kinda fell in love with it at first sight ...it has a 10 pt wolfe moly cage ..moser 9" and all BMR front and rear suspension...no the coffee cans are actually full of lead shot to simulate the weight of the complete .engine/trans /cooling system ...for setting the ride height while I build the headers ...theres about 450 lbs on the nose ..under the coffee cans there is a milk crate with weights in it ...I started a build thread ....but progress has been a little slow ...too many projects ..lol
