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Location:
Brisbane
Registered:
May 2002
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5M-E cold starting
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Mon, 10 February 2003 02:35
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When I start my 5M-E Cressida (when cold) it starts fine, but then either dies straight away, or drops to about 500 rpm and then kinda surges its was back to idle, it is hard to explain.
I think its the cold start injector as it starts perfectly when it is warm. I removed the injector and watched it spray into a jar and I didn't spray a nice spray, more kinda dribbled (but a bit came out still).
Any opinions?
Cheers
Wilbo
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Location:
Brisbane
Registered:
December 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 07:17
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a normal problem. My supra used to do it too. Starting injectors. Just keep your foot on the throttle for a little while when you start it until you can feel it idlying smooth.
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I supported Toymods
Location:
Brisbane, QLD
Registered:
May 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 08:06
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Wilbo,
The most likely cause of your problem (by the sounds of it) is the cold start air bypass valve which opens up when the engine is cold and allows air into the engine by-passing the throttle body. This valve is known to disfunction after a fair bit of use. So if you can replace it (or even adjust it if that is possible by taking it apart), that would be the go.
Good luck.
Cheers
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Location:
Brisbane
Registered:
May 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 09:39
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| ROBBO_ma61 wrote on Mon, 10 February 2003 18:17 |
a normal problem. My supra used to do it too. Starting injectors. Just keep your foot on the throttle for a little while when you start it until you can feel it idlying smooth.
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Yep that is what I do atm, funny thing is that if the AC is on the car starts perfectly!
How does the AC thing work maybe I can mimic it?
Will have a look at the Air bypass valve tomorrow...can you take it apart?
Cheers Wilbo
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Location:
Brisbane
Registered:
December 2002
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Toymods Board Member
Location:
Sydney
Registered:
September 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 10:25
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lol my a/c causes the car to stall cos it doesnt kick in the revs to equal up the engine...revs as about 300rpm lol anybody know how to fix that?
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Isn't there a idle up on the plenum for the A/C?
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Location:
Brisbane
Registered:
December 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 10:26
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where the hell do i find that? YEah in hot weather im getting really sick of it stalling as i change down about 50 metres from the traffic lights.
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 11:37
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| wilbo666 wrote on Mon, 10 February 2003 20:39 |
Will have a look at the Air bypass valve tomorrow...can you take it apart?
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The valve sits on top of the Thermostat housing. A hose from the intake after the resonator leads into it, from there it is connected to the inlet manifold with another hose. It is connected with the color blue connector. if you decide to remove it for a small look, careful of the 2 hoses connected to the lower part of the valve, it is connected to the cooling lines.
As for pulling it apart. Can't help you there.
I had similar problems and got given one by GT. It solved all my cold starts in the morning and threw the old one into the back paddock and shot it.
PS. Not many hoses remain in Australia that lead into and from the cold start by-pass valve. One cost me $34.
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Location:
Brisbane
Registered:
May 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 11:45
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Ahh ok, I know the one, from memory it sits on top of the temp thing and doesn't actually have coolant hoses coming into it, just the other two. Will see if a clean out with carby cleaner will help.
Also when should I change the fuel filter? I don't know when it was last changed so should I change it for my piece of mind?
Cheers
Wilbo
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Location:
Brisbane
Registered:
December 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 11:49
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they should be fine unless u retire with the engine...and everyone knows u wont  main good maintenance is running genuine toyota parts like oil filters and air filters...believe it or not they help with engine life compared to ryco or other brands.
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 12:02
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My fuel filter was replaced in 1992 though has only travelled 40,000. By looks of the petrol filter it might be a bugger to replace since it sits below the intake manifold. All the cars we own breaths through K&N Airfilter.
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Location:
Brisbane
Registered:
December 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 12:05
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element or pod filter? I was thinking of putting a pod on mine a while back but too much trouble...had to take off cold air pump...plug lines to head and other stuff...
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: 5M-E cold starting
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Mon, 10 February 2003 12:10
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Um... To keep the car Stock... What do you think?
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Location:
Brisbane
Registered:
May 2002
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Location:
Brisbane
Registered:
December 2002
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Re: 5M-E cold starting
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Tue, 11 February 2003 07:58
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forget about the cold start thing ay. Theyre an old engine and it isnt worth looking around for...you just have to live with...if u so desired take it to an auto elec or mechanic.
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Location:
Brisbane
Registered:
May 2002
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Re: 5M-E cold starting
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Tue, 11 February 2003 08:03
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Live with it...smeh!
If it is a part I can get for $5 why would I NOT worry about it? 
Its the little things like this that can make your car so much better! I bet if your low fan speed setting didn't work you would go "ahh its old, I don't wanna worry about it" when you could fix it for free alomst.
So if its fine with you I will worry about it! 
Cheers
Wilbo
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Location:
Brisbane
Registered:
December 2002
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Re: 5M-E cold starting
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Tue, 11 February 2003 08:06
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ok mate...you do that.. the part may be $5 but who r u gonna pay to go looking for it? It might be the starting injectors...it could be anything...
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Location:
Brisbane
Registered:
May 2002
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 5M-E cold starting
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Tue, 11 February 2003 11:52
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Yeah, check it all out.... Cold start injectors always spray a horrible mess, but it should still be better than a dribble. Check the thermotime switch, and the air bypass valve should be open when its cold to let more air in for a faster idle.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 5M-E cold starting
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Wed, 12 February 2003 04:33
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| ROBBO_ma61 wrote on Mon, 10 February 2003 21:17 |
i wouldnt bother pulling things like the air by pass valves apart...they're an old engine lets face it...its just something we have to live with...
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guess you should just put up with the car stalling robbo. its old, what do you expect... why waste everyones time trying to help you huh??
mrshin: cold air bypass should be fully open when cold, and slowly close as the temp increases. the cold start injector switch should be on when cold, and switch off at operating.
cold start spray should be a fine mist, not a dribble. youll be horribly riching out cyls 3+4 and leaning out 1,2,5,6. that could potentailly stall things.
is the EGR valve working properly?
are you sure all the vac hoses are patent? have you tried simply running some carby cleaner thought the trottle body whilst the car is hot? you could also try sucking a bottle of redex through a vacuum hose when hot, maybe clean a few things up.
let me think about this one
cheers
ed
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Location:
Brisbane
Registered:
May 2002
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