| [ Total Views: 1687 | Total Replies: 20 | Thread Id: 32870 ] |
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 ratbug
A.k.a.: Andrew Todd
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| posted on December 12th, 2004 at 08:22 PM |
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new EJ20 not running right
Just fired up the EJ20 and after starting it a few times its always hard to start, take a fair bit of cranking, splutters a bit and then eventually
runs. Also it doesnt idle, have to keep my foot on the accellerator and generally seems to be running rough. The engine sometimes stays on while the
engine is running, sometimes it goes out.
All spark plugs look ok after running, all plugs get spark. I'm pretty sure its wired up correctly. All vacuum ports are connected, idle solenoid
connected etc.
Is there something i may have missed?
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pete wood
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| posted on December 12th, 2004 at 08:33 PM |
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sounds like a fuel system issue.
do you have all your pumps and filters in place?
are all the pumps running?
which cylinders are not running properly?
are the injectors all clean?
try these things first.
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ratbug
A.k.a.: Andrew Todd
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| posted on December 12th, 2004 at 08:54 PM |
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Hi Pete, yeah the pumps (HP and LP) prime fine when the ignition is first swithed on and while running. I don't i'm a particular cylinder down, it
seems to run smooth at time at mid rpm. Have no idea if the injectors are clean, i'm assuming they are since the engine has only done 80,000km.
Just connected the black diagnosis connector, its flashing CODE12 at me.. From my web source this means STARTER switch.. this wouldnt be causing the
engine to run rough, maybe the slow starting though. Might buy an AUS liberty manual since i don't trust the foreign manuals off the web.
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Baja Wes
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| posted on December 13th, 2004 at 08:18 AM |
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Sounds to me like there is an air leak somewhere behind the air flow meter.
This can occur if a brake booster or PCV valve or other vacuum style line on the intake is not connected, or is vented to a oil breather (EFI cars
don't like this). This causes problems before in order for the EFI to work it has to know exactly how much air is going into or out of the system,
everything must go through the air flow meter.
So when it has air bypassing somewhere, the air flow meter thinks no air is going in at idle, so puts in pretty much no fuel (a very little). Hence it
is hard to start and coughs and splutters at idle.
But if you rev it, then the air leak is relatively small compared to the air now going through the open throttle body. Therefore it runs relatively
well when revving.
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gayanne
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| posted on December 13th, 2004 at 08:59 AM |
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It could be what bajawes said,all sounds computer not tuned.Depending if aftermarket if so check tuninig specs.JVLRacing
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ratbug
A.k.a.: Andrew Todd
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| posted on December 13th, 2004 at 08:17 PM |
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Tried to get it going tonight, fired a couple of times, then won't fire at all. After checking everyhting it looks like its fuel related, i'm
getting heaps of pressure at the top rail (inlet) from the HP pump (don't know the exact pressure, but the hose explodes off the fitting when you
wiggle it with no hoseclamp). BUT, there is nothing going into the return line back to the surge tank, the hose is bone dry, while activating the
pumps, if i put my finger over the return pipe from the engine, there is no pressure at all. So there must be air trapped in the fuel lines, nowhere
to go.. I reckon the regulator is stuffed. And i got a booking with the engineer on thursday, two nightsa of work, i'll just have to finish off the
rest of the car and leave the engine as it is for the inspection.
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555bug
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| posted on December 13th, 2004 at 08:27 PM |
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you did use the standard suby key and starter switch? obviously the key contains a chip that authenticates it to the ecu. If that switch is a bit
iffy that could be your problem. |
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ratbug
A.k.a.: Andrew Todd
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| posted on December 13th, 2004 at 09:10 PM |
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Nah, using the VW keyswitch, my 96 model ej20 doesnt have the protection in it..
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Jenny
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| posted on December 14th, 2004 at 07:13 AM |
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Have you checked the connection between the fuel pressure regulator (FPR) and the intake manifold? If you have a leak in that hose then the FPR won't
work properly.
[Edited on 13-12-2004 by Jenny]
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Craig Torrens
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| posted on December 14th, 2004 at 08:49 AM |
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Sounds like you may need a VW engine!:kiss
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boof2332
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| posted on December 14th, 2004 at 10:48 AM |
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Maybe you could get Rudi Frank to build you a 1915..hasn't he got 20 ponies more than all the other 1914's around, and he only has 4 spark plugs!
Then again it will still be 200 hp short of the ej20t.
 kiss
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Baja Wes
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| posted on December 14th, 2004 at 12:13 PM |
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definitely got issues if the fuel ain't returning. If which case the fuel pressure is probably way too high, making it run really rich (when it does
run), and eventually flooding it.
FPR could be completely stuffed, or you simply have a blockage in the fuel line. Look for wasp's nests and foreign insect related blockages that
happen in a slow moving project.
If you have compressed air available try blowing that through the fuel lines at various points.
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ratbug
A.k.a.: Andrew Todd
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| posted on December 14th, 2004 at 06:35 PM |
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| Quote: |
Sounds like you may need a VW engine
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Hehe, yeah i'm beginning to think the same. Its summer and the buggy is stuck in the shed, just like last summer.
I'm making progress though, got the FPR off, put 30psi of compressed air through it, and it went through, so its not blocked.. put air through the
lines, not blocked either. Hooked it all up, still nothing coming out of the return.. Thought i'd double check the fuel pumps.. the LP pump isn't
working (it must have been half working the other day, because fuel was going from the surge tank to the main tank when the pumps operated, but now
there is nothing. I'm hoping thats the only problem, covered under warranty. Moved the inspection to next week, so a little less stressed (at the
moment anyway).
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Brad
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| posted on December 14th, 2004 at 09:40 PM |
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mm if your LP pump is stuffed how does yout HP pump get fuel to push out when you wiggle the HP hoes on the inlet side ?
I would just check your Fuel line into a can and run the HP straight from it. If you have fuel going into your rail and nothing is coming out then you
have issues, fuel should flow through freely when you turn your key on for a few seconds then stop. You should hear it running back into your tank.
Now with your code 12 check the wire you have going from your ECU to your starter circuit / switch. If it isn't connected then your ECU will not
actually know it is starting and will not increase the the fuel flow to assist with starting.
As for a VW engine ..... it will be worth the upgrade .....
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Baja Wes
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| posted on December 15th, 2004 at 10:14 AM |
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| Quote: | Originally
posted by Craig Torrens
Sounds like you may need a VW engine!:kiss
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I guess then the occasional not starting and running rough would be normal and not a problem to be solved 
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pete wood
A.k.a.: figure itout
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| posted on December 17th, 2004 at 05:49 PM |
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hey Rat, have you sorted it yet?
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ratbug
A.k.a.: Andrew Todd
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| posted on December 17th, 2004 at 06:02 PM |
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Yeah, it ended up being the LP fuel pump, which was one of the first things i checked, double checked, and no flow. All fixed now, went to start and
it purs very nicely. Takes a couple of seconds for it to start firing though, i'm guessing this would be my START signal problem which i'll sort out
on the weekend if i have time.
Didnt end up taking it to the engineer, but will take it this wednesday instead.
Thanks guys for the responses.
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ratbug
A.k.a.: Andrew Todd
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| posted on December 22nd, 2004 at 07:53 PM |
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Good news today, got it inspected at the engineer and got the big thumbs up.. Still having trouble starting it though, takes a fair bit of cranking to
get it to fire, but once fired up it runs smoothly. I checked the START signal to the ECU and it goes to 10-11v while cranking (0 all other times) so
i dont see what the problem is, unless i have the wrong wire.. its the thick (goes thin into the ECU) BLUE/RED trace wire which on my wiring diagrams
goes to the START contact on the ignition switch.
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pete wood
A.k.a.: figure itout
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| posted on December 23rd, 2004 at 09:47 PM |
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mmm, wiring troubles, good luck dude.
BTW are you coming down to sydney soon, I love to have a perv at it, does it go hard?
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Craig Torrens
A.k.a.: Craig Torrens
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| posted on December 24th, 2004 at 07:59 AM |
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Congrats on the inspection approval :thumb
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ratbug
A.k.a.: Andrew Todd
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| posted on December 24th, 2004 at 11:57 AM |
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| Quote: |
BTW are you coming down to sydney soon, I love to have a perv at it, does it go hard?
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Don't know if it goes good yet, i've driven it around the block a few times, sounds good,, sometimes it hesitates.. havn't hooked up the speedo
sender yet either, but picked up a new VDO one yesterday and will put that in. Its not exactly roadworthy at the moment, no seat belts, a few things
arn't bolted down yet etc, had to rush things because the engineer was going on hollidays for 3 weeks. Hope to fix most of this by boxing day, then i
have a week off to play!
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