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Location:
Victoria
Registered:
May 2002
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GZE MR2 Troubles
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Fri, 23 September 2005 06:56
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hello
I got some problems with my MR2 and its starting to give me the shits, last night i retorqued the head bolts and the engine was running fine before i pulled it apart. And as most of you would know retorqing the head bolts meant removing the cams etc. So im pretty sure timing, either cam or ignition is my problem. Right now the car is drivable, and pulls freely to redline but breaks up SLIGHTLY in the top end, might miss once or twice thats it before im at the rev limiter. It is down on power a little.
But the main problem is idle, its allways hunted and i havent found anything to cause it yet. But once it reaches operating temp it hunts between something like 300rpm and ~1000rpm. After 3 or for "up/downs" itll stall, kinda makes it hard sitting at the lights.
The other hint as to what my problem is, when i crank the motor. It will spin freely for a few revs, then all of a sudden stop. Like hitting a brick wall, im thinking an ignition event too early or something stopping the piston from going all the way. This happens probably 2 out of every 3 attempts to start the car
The other thing is that the dizzy is advanced all the way it can go. If i retard it just a little the motor will die.
These signs seem to point to my timing being off, but the cam timing seems spot on. I have a hard time putting the dizzy in the right spot because of the firewall.
Has anyone got any ideas as its starting to shit me
Phill
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Location:
Perth WA
Registered:
December 2003
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Re: GZE MR2 Troubles
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Sat, 24 September 2005 13:00
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sounds like your exhaust cam is one tooth retarded.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: GZE MR2 Troubles
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Sat, 24 September 2005 13:44
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yea, check the static timing again.
the dist isnt that hard to pull out, as it does sound like it is installed wrong if you have no adjustment.
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Location:
Melbourne
Registered:
May 2002
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Re: GZE MR2 Troubles
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Sat, 24 September 2005 14:26
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hey phill
my car's been grumpy for a while, but driving to flemington made me do something about it, something to do with fuel economy and having to drive with three feet.
problem, car idle drops slowly till it dies, but mine didn't bounce. and crap fuel consumption 300kms to 40l, trying to conserve fuel too.
my fix, since my afm has been tweaked numerous times, i tightened it up two teeth, seems to have cured the drinking problem.
and for the dropping idle, it seemed the car was running out of fuel, or drowning from too much, so i had a fiddle with the bypass on the afm. now it sits at 950 at night with the thermos on whilst at the lights.
i think my idle control motor is stuffed too.
dan
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Location:
Victoria
Registered:
May 2002
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Location:
Victoria
Registered:
May 2002
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Location:
nelson, new zealand
Registered:
October 2004
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Re: GZE MR2 Troubles
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Sun, 25 September 2005 03:44
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revving idle is usually the idel control valve.
take it aprt, clean it put and cross ya fingers....
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Location:
Victoria
Registered:
May 2002
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Re: GZE MR2 Troubles
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Sun, 25 September 2005 12:56
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| Mr Revhead wrote on Sun, 25 September 2005 13:44 |
revving idle is usually the idel control valve.
take it aprt, clean it put and cross ya fingers....
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well it seems to idle fine when its cold, will hunt at operating temperature...
Its hard to tell sometimes it hunts sometimes it doesnt
Im just happy for now that its running fine and not down on any power 
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Location:
Newcastle, NSW
Registered:
May 2004
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Re: GZE MR2 Troubles
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Sun, 25 September 2005 13:42
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| gearb0x wrote on Sun, 25 September 2005 22:56 |
well it seems to idle fine when its cold, will hunt at operating temperature...
Its hard to tell sometimes it hunts sometimes it doesnt
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my 165 does something similar and i cant figure it out...cold starts and cold idles are fine...idles fine at opperating temp...but very occasionally when its allready warm and i start it,itll hunt really bad, or not even try to idle at all, if i put the foot down a little to keep it alive, it will be missing and caughing and spluttering, yet i stick it in gear..drive it 10 metres, and it clears up perfectly fine. and the problem only shows itself very occasionally
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