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ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2003/5/19 9:55
From Melbourne
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Been piss farting around with my motor and we seem to be slowly eliminating possible problems, but just tonight we seemed to conclude that all 4 injectors were not working. When the ignition is on the fuel pump goes for a few seconds then turns off like it should. I've had the CAS out and when it is turned by hand it's supposed to make the injectors fire with the ignition on however they do not. I borrowed a manifold and fuel rail from a mate and with his injectors plugged in they fired. From this the obvious thing would be to conclude that my injectors are stuffed but it just seems strange that all 4 of mine would be. Just wondering if anyone could second the fact that all 4 injectors could be stuffed and if so what other possible damage could be done to the engine that I don't know about? Sorry about the long thread... cheers
Posted on: 2003/9/30 16:46
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2002/11/26 22:13
From Wellington New Zealand
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seems improbable dude... Some injectors are low impedance (1 or 2 ohms) and require an external ballast resistor, or resistors... There's usually a 'ballast pack' of 4 resistors which needs to be bolted to something as a heatsink. This might be missing, or not required, or buggered.
Generally, running low impedance injectors on a brain that wants hi impedance injectors, or bypassing the ballast pack will kill the brain, not the injectors...
Non ballasted injectors are around 9 ohms... Grab a multimeter and compare your mates injectors to you own, and look for the presence or absence of a ballast pack...
Posted on: 2003/9/30 21:52
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2002/5/3 10:28
From Kyabram vic, aust,
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I had the same problem with mine!!! they would just not click. I stuffed around for a day, and after talking to someone "in the know?" they said to tap firmly on the side of the injector. and that will free then up, Some times if they are sitting around for a while they gum up with old fuel, a simple tap on the side of the injector while spinning the CAS and I was in buisness
Posted on: 2003/10/1 5:40
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Re: ca18, all 4 injectors stuffed? |
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No life (a.k.a. DattoMaster) 
Joined: 1998/12/6 1:08
From Sydney, Australia
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For the CA18DET, the Ballast resitor is about 20x20x120mm in size. It's mounted on the side of the air filter box, but it might be mounted on the vaccuum canister box with all of the vaccuum hoses coming out of it. If you don't have the resistor in, then you'll blow the guts out of the injectors. Maybe the importer tried to wire it up for a test and buggered it, unlikely?
But it could also be that they are gummed up. I've always had my injectors cleaned before trying to start my imported engines.
Chris
Posted on: 2003/10/1 10:22
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2003/5/19 9:55
From Melbourne
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yeh it seems they were just gummed up. Put some volts over then and gave them a tap and they started firing! I'm gonna head back out to the garage and try get it started! thanks guys
Posted on: 2003/10/1 11:18
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2002/11/26 22:13
From Wellington New Zealand
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sweet! I learned something!
Posted on: 2003/10/1 21:29
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Re: ca18, all 4 injectors stuffed? |
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No life (a.k.a. DattoMaster) 
Joined: 1998/12/6 1:08
From Sydney, Australia
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Try and record a WAV file for us to hear the first time it was started.. I'll be doing that for my engine. Actually I might make a digital video of the "first start" event.
Posted on: 2003/10/1 23:39
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2003/5/19 9:55
From Melbourne
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Registered Users
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It's alive! Sorry chris I didn't take record the starting because my useless digi cam doesn't record sound! Anyway it's running fairly smoothly but doesn't want to rev, I don't have a tacho plugged in so I don't know what sort of revs it's doing but it reaches a point and splutters and won't rev any higher? Could this just be a timing thing, because I have had the CAS out, or something else. Also it seems I've wrecked an O-ring on injector 1 and am getting some leakage from it's back end.
Posted on: 2003/10/2 3:36
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2002/11/26 22:13
From Wellington New Zealand
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im guessing the airflow meter isnt registering the amount of air going thru... I know fekall about factory airflow meters however....Is this a hotwire type of thing? I think the hotwire ones glow briefly when u switch them on, to burn the crud off the wire...
there's probably a switch on the throttle somewhere to tell the brain that it's idling.. Check that this is acting as it should....
fuel pressure?
Posted on: 2003/10/2 5:15
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Re: ca18, all 4 injectors stuffed? |
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Home away from home 
Joined: 2002/5/3 10:28
From Kyabram vic, aust,
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Ive heard of Vl commodres doing a similar thing when the AFM $hits it self, try unplugging it and see if it changes, I guess if its not working and you un plug it nothing would change, maby.
This wont help your revving problem, but its a good trick if you are going to screw up the boost. Cut the wire that goes from the engine temp to the computer.(not the temp gague one) and run it through a hobbs pressure switch (n/c). Then across the contacts of the switch solder a 0-5 k trim pot( avaivable from dick smiths for a dollar or so). As soon as it goes on boost the hobbs switch opens the contact and the signal goes through the trimmer, tricking the computer into thinking the engine is cold and it will richen up the mixture.. Then get it on a dyno and put a gas annliser on it and set the trimmer under load on boost, when it is set measure the restance of the trimmer and get a resisor of the same value and replace the trimmer with the resistor, presto....
P.S dont forget a bit of vas on the 'O' rings b4 you put injectors back in
Posted on: 2003/10/2 8:15
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