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Location:
sunny coast, qld
Registered:
October 2002
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easiest way to check inlet valves are working?
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Mon, 26 January 2004 03:50
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Hi,
In my 5 cylinder 1jz-gte I have narrowed the issue down to no fuel or no air. I will be checking the injector this arvo and I was told one way of checking to see if the inlet valves are opening.
I was told to get a piece of wire with a small right angle at the end of it, place it in the spark plug hole facing the inlet side and turn the harmonic balancer around until it gets to the inlet stage and i should be able to feel the valve pushing the wire down slightly. Does this sound like a good idea? Any other ways besides pulling the head off?
thanks
Chris
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Location:
BrisVegas---YeeeHAW
Registered:
January 2004
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 05:15
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i would pull the head off anyway as it could be something else that is your problem, such as collapsed water jacket making a cylinder not fire anyway, and if it wasnt at least you would be able to see all the valves moving, or possibly they are moving but one or two are bent
better to know for sure than to guess and hope
tony
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Location:
Lost in the K hole
Registered:
May 2002
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 09:32
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sounds a bit unlikely that the valves arent opening...
i mean, is an overhead cam engine, theres not a whole lot getting in the way of the cam opening the valve. simply taking off the cam cover and watching the cam rotate onto the valve bucket should be enought to tell you whether its working or not.
id be much more inclined to check the fuel injector - more likely its buggered/stuck/malfunctioning than no air getting in.
have you checked spark? checked the coils? checked signal to the coils?
have you pulled the plug and coil out and watched it spark to earth?
i say youve got a bloody long way to go before having to pull the head off
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Location:
sunny coast, qld
Registered:
October 2002
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 10:33
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I just checked the spark, coils and the signal to the coils and they were all good.
Compression is good in all cylinders.
I pulled the plug out and it was sparking when on the ground.
I unplugged the coil and ran the car for a second and then pulled the plug out and there was no fuel on it. So then i pulled the plug out and ran it for a sec and there was no mist coming out of the plug hole.
Then i checked that there was power on the terminals for the plugs and the cylinder that isn't firing had the same as another one. This leads me to believe that the injector is clogged or something.
I am going to start a new thread on the removal of the injector.
Thanks
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 10:38
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if compression is good, then air is getting in ok.
if you have spark, then it can only be fuel.
get a long screwdriver and put the end on the injector in question while engine is running. put your ear on the other end (the big end  ) and you should easily hear if it is clicking or not.. check against the others..
if in doubt, take them to get checked by a decent injector servicing shop. get them cleaned anyway 
undo fuel rail. pull injector out?
Cya, Stewart
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Location:
BrisVegas---YeeeHAW
Registered:
January 2004
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 11:29
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undo your tank fuel cap before unplugging injectors, this will release pressure in the fuel system and avoid you getting a squirt of fuel everywhere
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 11:39
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how will undoign the fuel tank cap help? any retained pressure will be in the section of line between the fuel pump, injectors, and fuel pressure reg....
Cya, Stewart
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Location:
Brisbane
Registered:
June 2003
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Location:
Lost in the K hole
Registered:
May 2002
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 11:55
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| ThatDogsFullySickMate wrote on Mon, 26 January 2004 22:29 |
undo your tank fuel cap before unplugging injectors, this will release pressure in the fuel system and avoid you getting a squirt of fuel everywhere
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wtf are you smoking?
if you want to depressurise the fuel system, start the car, then remove the efi fuse from the main relay/fuse box in the bay. the engine will soon die. try starting it several times (it should splutter and die, and eventually do nothing but crank over)
THAT is how you depressurise the fuel system 
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Location:
BrisVegas---YeeeHAW
Registered:
January 2004
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 12:11
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| ed_ma61 wrote on Mon, 26 January 2004 22:55 |
wtf are you smoking?
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tyres ?
i had a ra65 with the pump in the tank the haynes manual said that is how to depressurize a system ?
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Location:
Lost in the K hole
Registered:
May 2002
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 12:20
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| ThatDogsFullySickMate wrote on Mon, 26 January 2004 23:11 |
tyres ?
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you gotta wonder about haynes sometimes
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Location:
BrisVegas---YeeeHAW
Registered:
January 2004
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Re: easiest way to check inlet valves are working?
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Mon, 26 January 2004 12:26
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i dont know im just a chef !
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Location:
Mentone
Registered:
May 2002
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Re: easiest way to check inlet valves are working?
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Tue, 27 January 2004 03:46
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with a very nice hair cut
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Location:
BrisVegas---YeeeHAW
Registered:
January 2004
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Re: easiest way to check inlet valves are working?
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Tue, 27 January 2004 03:55
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its max headroom
drink coke and be refreshed
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Location:
Brisbane
Registered:
February 2003
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Re: easiest way to check inlet valves are working?
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Tue, 27 January 2004 10:19
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| ThatDogsFullySickMate wrote on Tue, 27 January 2004 13:55 |
its max headroom
drink coke and be refreshed
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dont you mean to say:
dr dr dr drink coke and and and and be and be refrershed ../
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Location:
BrisVegas---YeeeHAW
Registered:
January 2004
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Re: easiest way to check inlet valves are working?
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Tue, 27 January 2004 10:32
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C-c-c-catch the wave
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