mr
Thread Starter
Intermediate
Joined: Nov 2012
Posts: 27
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mr
my car has just been dieing lately like its out of gas. its cranks back up. and idles good but it just dies on its own like the key was turned off or out of gas. i just put a new fuel filter on it , and a starter. when i pressed the valve on the motor its weak or just seaps.
1987 c4 corvette..
1987 c4 corvette..
Last edited by thebuziness; Nov 5, 2012 at 11:39 AM. Reason: not enough work
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
Thats unfortunate.
But, in order to help with that, we're gonna need a little more info. Like...what yr? whats been done to it? any upgrades? miles? etc...
all that stuff helps. in fact, can;t do a damn thing with out it !
But, in order to help with that, we're gonna need a little more info. Like...what yr? whats been done to it? any upgrades? miles? etc...
all that stuff helps. in fact, can;t do a damn thing with out it !
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Thread Starter
Intermediate
Joined: Nov 2012
Posts: 27
Likes: 0
my car has just been dieing lately like its out of gas. its cranks back up. and idles good but it just dies on its own like the key was turned off or out of gas. i just put a new fuel filter on it , and a starter. when i pressed the valve on the motor its weak or just seaps.
1987 c4 corvette..
1987 c4 corvette..
Thread Starter
Intermediate
Joined: Nov 2012
Posts: 27
Likes: 0
sorry 87 c4. i just changed the fuel filter under passanger side by door . thought that was the problem. the next day driving same thing die and crank and go . then die . crank and go .. thanks
Pro
Joined: Jan 2012
Posts: 605
Likes: 2
From: Queen Creek Arizona
i had that same problem i kinda still do my 84 would just die like you said its like someone turned the key off. i changed the fuel pump, fuel filter, and cleaned the lines and still something. my friend also has an 87 and he said just keep the tank full, and haven't shut off since.
Pro
Joined: Oct 2012
Posts: 613
Likes: 3
Check your FSM to see what the residual pressure should be.
Start the engine, check your fuel pressure at idle.
compare those numbers against what should be normal indicated in your FSM, report back.
If numbers are low pressure loss could be leaks, bad pump, or bad fuel pressure regulator.
If numbers are high, possible clogged lines, or pump pulling too many amps increasing flow which may translate to slightly higher pressure down the line.
Start the engine, check your fuel pressure at idle.
compare those numbers against what should be normal indicated in your FSM, report back.
If numbers are low pressure loss could be leaks, bad pump, or bad fuel pressure regulator.
If numbers are high, possible clogged lines, or pump pulling too many amps increasing flow which may translate to slightly higher pressure down the line.
Last edited by GQ-ROD; Nov 7, 2012 at 06:22 PM.
Pro
Joined: Oct 2012
Posts: 613
Likes: 3
i had that same problem i kinda still do my 84 would just die like you said its like someone turned the key off. i changed the fuel pump, fuel filter, and cleaned the lines and still something. my friend also has an 87 and he said just keep the tank full, and haven't shut off since.
Then i'll move onto fuel pressure testing. Throttle position sensor testing etc. to narrow it down.
84's are different than later cars i've learned so the FSM is vital to get a starting point on model specific fuel systems and testing procedures in diagnosing these issues.
Thread Starter
Intermediate
Joined: Nov 2012
Posts: 27
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the buziness
should there be alot of pressure on the valve on the engine , i have tpi. i just changed the filter and put a new starter on , car was tilted alot, when i cranked it it was sluggish. but cranked and ran for a while then started stalling.
Check your FSM to see what the residual pressure should be.
Start the engine, check your fuel pressure at idle.
compate those numbers against what should be normal indicated in your FSM, report back.
If numbers are low pressure loss could be leaks, bad pump, or bad fuel pressure regulator.
If numbers are high, possible clogged lines, or pump pulling too many amps increasing flow which may translate to slightly higher pressure down the line.
Start the engine, check your fuel pressure at idle.
compate those numbers against what should be normal indicated in your FSM, report back.
If numbers are low pressure loss could be leaks, bad pump, or bad fuel pressure regulator.
If numbers are high, possible clogged lines, or pump pulling too many amps increasing flow which may translate to slightly higher pressure down the line.
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Pull your ECM codes to see what your diagnostics are telling you. Also, as mentioned above, check the fuel pressure at the fuel rail on the passenger side of the engine. Check it out and let us know what you discover.
If you need to replace your fuel pump, follow the attached instructions. Changing the fuel pump is an easy job which should take no longer than an hour. A new Walbro pump is about $75.
If you need to replace your fuel pump, follow the attached instructions. Changing the fuel pump is an easy job which should take no longer than an hour. A new Walbro pump is about $75.
Burning Brakes
Joined: Nov 2008
Posts: 995
Likes: 1
From: Naples Campania
Pull your ECM codes to see what your diagnostics are telling you. Also, as mentioned above, check the fuel pressure at the fuel rail on the passenger side of the engine. Check it out and let us know what you discover.
If you need to replace your fuel pump, follow the attached instructions. Changing the fuel pump is an easy job which should take no longer than an hour. A new Walbro pump is about $75.
If you need to replace your fuel pump, follow the attached instructions. Changing the fuel pump is an easy job which should take no longer than an hour. A new Walbro pump is about $75.
Great attachment. I just replaced my fuel pump and that misses nothing at all.
Codes should always be checked first. I believe your year can still do the "paperclip trick".
It definately sounds like you are running out of fuel. You can run to an auto parts store and get a GM fuel pressure tester. Turn the car on and the pump should prime to 32 PSI. Turn the key back on and come back in 15 minutes. You should have lost no more than a few pounds. Come back in an hour and it should still have some pressure. Maybe about 20 PSI? *someone confirm?*
My bet is on the fuel pump.
Pro
Joined: Oct 2012
Posts: 613
Likes: 3
Intake or exhaust does not matter for fuel pressure.
Being tilted doesn't affect fuel pressure.
As has been mentioned pull your codes, stalling is usually lack of fuel or pressure, vacuum leak, or poor spark or timing.
Sluggish while cranking means weak battery or poor battery/starter connections.
Burning Brakes
Joined: Mar 2005
Posts: 800
Likes: 2
Not sure what you mean by pressure ON THE VALVE, which valve?
Intake or exhaust does not matter for fuel pressure.
Being tilted doesn't affect fuel pressure.
As has been mentioned pull your codes, stalling is usually lack of fuel or pressure, vacuum leak, or poor spark or timing.
Sluggish while cranking means weak battery or poor battery/starter connections.
Intake or exhaust does not matter for fuel pressure.
Being tilted doesn't affect fuel pressure.
As has been mentioned pull your codes, stalling is usually lack of fuel or pressure, vacuum leak, or poor spark or timing.
Sluggish while cranking means weak battery or poor battery/starter connections.