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magicsammy
08-31-2005, 08:37 PM
Mitsubishi 3000GT VR-4

everything was fine until I left from work today.

I started the car and it died. So I started it again and it died.

I started it again and held the gas and left for home always with a foot on the gas to keep it at about 1000 RPM.

otherwise it was perfectly fine - no loss of power.

Battery is good and cranks really well.

Any ideas?
StevenMosley
09-01-2005, 03:42 AM
Vacuum leak?
Darryl
09-01-2005, 06:03 AM
Disconnect the battery, that will reset the computers.
EWAustin
09-01-2005, 07:13 AM
I googled this (3000gt idle problem) and came up with a Throttle Position Sensor that is out of adjustment. apparently if the TPS isn't closing all the way the car will not idle on it's own. Try Google, it's full of great answers.

Oh, and good luck, I know how bad it sucks have a car that doesn't want to run. I had to sign a Subaru Factory Mechanic (who didn't speak english) on base in order for him to spend 30 minutes to tell me that my fuel pump had died. Which is what I thought it was, but people kept telling me it was the Crank position sensor or cam position sensor. </rant>

-Eric
73GT
09-01-2005, 08:06 AM
Check Engine light on? I wouldn't didconnect the bat to reset the computer before I find out.

Lee F.
magicsammy
09-01-2005, 08:24 AM
no check engine light

I will unplug the battery when I get home tonight and see what happens
larry200
09-01-2005, 09:50 AM
Hope the reset works. If not, I second the vacuum leak.

-- Larry B.
Shrep
09-01-2005, 11:23 AM
I'm not a miata expert, but I'd guess that resetting the battery isn't going to solve this. I'm thinking along the lines of a TPS, but more likely a vacuum leak.
magicsammy
09-02-2005, 01:28 PM
tried the CPU reset - disconnected the battery for about an hour then reconnected it - no luck still very low idle

looked into the 3000GT shop manual and found the engine idle adjustment screw and figured I'd give that a shot - turned it up and so far so good.

the engine idle adjustment screw is VERY loose - no resistance when I turn it.

Maybe it just needed to be readjusted.

thanks for all your input!
phile
09-02-2005, 02:13 PM
I'm not a miata expert,

Good thing. It's not a Miata, it's the big Mitsu.
phile
09-02-2005, 02:17 PM
the engine idle adjustment screw is VERY loose - no resistance when I turn it.

Not that I would expect this, but is this screw supposed to have a lock nut? If the nut vibrated off, that would give the idle screw no resistance to wandering about with vibration, and it is going to happen again.

If there is no lock nut in the design, maybe you could put on some blue LocTite.
weidnerpaul
09-02-2005, 02:19 PM
tried the CPU reset - disconnected the battery for about an hour then reconnected it - no luck still very low idle

looked into the 3000GT shop manual and found the engine idle adjustment screw and figured I'd give that a shot - turned it up and so far so good.

the engine idle adjustment screw is VERY loose - no resistance when I turn it.

Maybe it just needed to be readjusted.

thanks for all your input!

So you had a screw loose?

I have that all the time :lol:
914 Dave
09-02-2005, 07:32 PM
Personally or automotively?
SmokingTires
09-02-2005, 07:59 PM
Personally or automotively?

Like you really need to ask :rolleyes: :lol:

The first one!
weidnerpaul
09-02-2005, 08:57 PM
Dave --- Personally or automotively?

Mike --- Like you really need to ask :rolleyes: :lol:

The first one!

Hey,
BOTH actually
:D

PS, Mike, Check out what I think you're new signature should be...
:lol:
Darryl
09-02-2005, 09:39 PM
engine idle adjustment screw


WT...Idle Adjustment Screw... Seems so 60's...
weidnerpaul
09-02-2005, 09:59 PM
WT...Idle Adjustment Screw... Seems so 60's...

I have two, it's a 50's thing too!!!
Darryl
09-02-2005, 10:01 PM
Paul, Phil and Darryl, posting at 11:00 Friday night... we need to get a life....
weidnerpaul
09-02-2005, 10:12 PM
Paul, Phil and Darryl, posting at 11:00 Friday night... we need to get a life....

We have lives, just not exciting ones on Friday nights
:lol:
SmokingTires
09-02-2005, 10:19 PM
We have lives, just not exciting ones on Friday nights
:lol:

Agreed.

But I work at 9am....
AlexL
09-02-2005, 10:36 PM
WT...Idle Adjustment Screw... Seems so 60's...
Your car has one. ;)

If you want something archaic, I just set the ignition timing on my motorcycle... Spark advance is specified in millimeters rather than degrees, so you have to stick a dial gauge into the spark plug hole, zero it out at TDC, and turn the engine backwards by hand until you're at 1.8mm BTDC. The entire job requires a dial gauge, a set of feeler gauges, a multimeter, and an assortment of wrenches and screwdrivers. The same job on my Miata requires a timing light and a 12mm wrench.
phile
09-02-2005, 11:17 PM
Paul, Phil and Darryl, posting at 11:00 Friday night... we need to get a life....

Well, I am signing off now. Just because her TR4 is one wheel short of a set doesn't mean I can't take her to Square Peg for breakfast in the Saturn.
Jerry Schro
09-03-2005, 10:58 PM
I think Phil hit on something. What a great vanity plate "The Big Mitsu" would be on the 3000GT!