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EA82T starts and then stops immediately
Posted 11 March 2004 - 11:03 PM
I just finished putting in new intake manifold gaskets.....hence I removed intake manifold and then reinstalled. More than likely I caused the problem during my intake manifold removal and installation.
Now the cars starts (after about 10 seconds of cranking the starter) but then shuts down within 5 seconds.......as if it has run out of fuel. It runs great in that 5 second duration. If I let it idle it will run longer than if I rev the engine.........which seems to indicate the fuel delivery is just not happening.
I know that the fuel pump is working when I turn the key.....I disconnected the fuel line from the fuel filter and watched it spurt out a good healthy stream of gas for the 2 second duration that the fuel pump primes the gas lines. I ran out of daylight to perform any other checks.
Here are some of my thoughts.....
Did I put the vaccum lines on incorrectly? I was reading that the fuel pressure regulator has a vaccum line attached. Would the wrong line cause it to shut down?
Are there some wires that I may not have reconnected? Or wires that came loose?
Posted 11 March 2004 - 11:23 PM
Posted 11 March 2004 - 11:32 PM
Posted 11 March 2004 - 11:43 PM
look at the aluminum pipe that says "turbo 4x4".On the under side in the middle you will see a 5/8 hose.Make sure both ends of it are attached to their respective fittings
Posted 11 March 2004 - 11:55 PM
I dont recall disconnecting anything from the air box.......with the exception of the large hose (3 or 4 inch diameter) going to the turbo.
I actually installed the new intake manifold gaskets without disconnecting any of the fuel lines.......so I know all the fuel lines are still correctly attached. And I only disconnected 2 electrical connections. They were both sensors (looks like a spark plug with a single wire attached). One was on the top of the motor behind the intake manifold and the other was under the motor next the oil filter.
What about the fuel pressure regulator? Could I have mucked up a connection on that?
If I did muck up the connection to the MAS would that explain the motor only running for a few seconds (and having to crank the starter for 10 seconds to get it started)?
Posted 12 March 2004 - 12:05 AM
Posted 12 March 2004 - 08:02 AM
it sits facing the front of the car into the fuel rails.. check this one..
also check the one that comes off the passenger side valve cover and goes to that 3" round black tube..
any one of these off, would cause it to loose vacuum and suck air..
Posted 12 March 2004 - 08:40 AM
I will check those hoses but the problem seems much more dramatic than just a vaccum leak. I think if it was a vaccum leak it would run rough, cough, sputter, etc. My car starts after about 10 seconds of cranking the starter and then runs fine at idle for about 5 seconds (less if I rev the engine).
Logic seems to indicate that its not getting any fuel except for the 2 second burst of gas the fuel pump provides when the key is first turned on. I also noticed that if I do not turn off the key it wont start again......which implies that the only fuel is provided by the 2 second burst provided by the fuel pump when I turn the key on.
I am going to do some investigative work today. I am thinking of hardwiring the fuel pump (just as a test) and see if it will run.
Posted 12 March 2004 - 09:38 AM
Posted 12 March 2004 - 09:53 AM
Posted 12 March 2004 - 12:01 PM
Mine will start, run normally for a few seconds and then drop dead.
Hope this helps.
'91 Loyale 4wd 5spd Wagon
Posted 12 March 2004 - 12:12 PM
Originally posted by greggbrat
I have read that some vehicles use the signal from the oil pressure sending unit to activate the fuel pump. Does the EA82T use this design?
Not that I am aware of.. blieve its signal come from the disty via the ECU... if the disty stops spinning, (or if something senses its not spinning) the fuel pump stops working.
i'm with mick on the train of thought that something like th MAF isn't plugged in .
Posted 12 March 2004 - 02:08 PM
The fuel pump is working in a steady stream. I unplugged a fuel line and ran the gas into a jug to check. The fuel pressure regulator is hooked up via vaccum line.
I definitely know that fuel is getting to the injectors......and the injectors are at least giving enough fuel to let it run for a few seconds.
I also wanted to make sure that I didnt have another coolant leak from the intake manifold pouring into the cylinders so I drained the coolant.........no change......it still only runs for a few seconds.
Any other ideas?
Posted 12 March 2004 - 02:37 PM
Posted 12 March 2004 - 11:42 PM
Posted 17 March 2004 - 09:56 AM
87 GL Turbo Wagon *intercooled*
5 lug conversion
No mud... damn desert
Posted 17 March 2004 - 10:01 AM
Posted 17 March 2004 - 10:15 AM
the fuel pump is controlled by the ECU, when you crank the engine over the ECU will run the fuel pump for a specified amount of time then it expects to receive a ignition pulse single, if it doesn’t receive the signal it stops the pump.
Try back probing the relay and see if power is shutoff to the pump before or after the engine dies.
Posted 17 March 2004 - 10:19 AM
Any other ideas? The vehicle ran fine before I replaced the intake manifold gaskets.........so I am assuming I broke it somehow.
Posted 17 March 2004 - 01:33 PM
the MAF sensor is what tells the car how much air is coming in. If air is getting in somewhere else it will be confused and not regulate the mixture correctly.
important things I would look at.
the temp sensor on the manifold. (2 wire)
the TPS on the throttle body.
make sure the fuel pump is running like sugested. you can check this at the serial monitor connector(13 pin connector) blue with brown wire.
make sure all connectors by the battery are hooked up ok to eng. harness.
Posted 17 March 2004 - 02:22 PM
The engine runs fine if I spray fuel right into the throttle body. While it was running (with me spraying fuel into the throttle body) I watched the fuel pour into a container from the fuel filter. This tells me my fuel pump is working just fine.
So the following works.
all electrical ignition components
Apparently my engine is fuel starved. What would inhibit the fuel from getting into the cylinders given that the fuel does get through the fuel filter?
What I dont know is if the fuel injectors are actually firing. How can I tell/check?
And how can I tell if the fuel regulator is working as it should? I dont think its the fuel regulator because I just replaced the entire intake manifold assembly. The only thing I reused from the old intake manifold assembly was the wiring harness.
Any more ideas?
Posted 17 March 2004 - 02:58 PM
the hose from the fuel filter should go into the middle fuel rail..
the return hose should go into the fuel rail that runs from the pressure regulator..
Posted 17 March 2004 - 03:27 PM
I checked the fuel lines and they are all hooked up correctly. As stated earlier in the post I didnt even disconnect the fuel lines when this problem started happening.
I just pulled a fuel injector and watched it spray gasoline.......apparently the injectors are getting power.
This is the most confusing problem.............
Posted 17 March 2004 - 03:56 PM
double check and make sure the knock sensor is plugged in as well.. i know if the wire/plug gets bumped they like to break off..
Posted 17 March 2004 - 04:09 PM
Would a bad knock sensor (or disconnected knock sensor) cause this problem?
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