Question about Mitsubishi 3000GT

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Engine runns in open loop, will not idle. - 3000GT Mitsubishi Cars & Trucks

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  • fsilvan2005 Oct 07, 2008

    when istart the engine it idle and the car won't move

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Well I hope its over a 1996 and OBDII if so the reason its in open loop is one of the monitors has not run you need a scantool to see which monitor has not run let me know and I can help you

Posted on Sep 19, 2008

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I set my trucks RPM on a low setting, from inside, no engine tampering. Now it is warmer. My truck is still running at a low RPM, seems too low for current temperature. How can I adjust my RPM?


how did you adjust a pre-programmed ECU idle settings ??? please be more specific

the vehicle's ECU is pre-programmed to run higher than 1000 rpms while in "open loop mode" then idle back down to ~750 rpms once the engine reaches operating temperature "closed loop mode"

did you tap into the OBD 2 port and used a laptop to change the settings?

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2000 ford focus 2.0 vin p rough idle, stays in open loop, stalls


Most probable causes are the engine coolant temperature sensor has gone bad or the manifold absolute pressure sensor is not sending the correct voltage signal. Both of these sensors let the ECM know when to go into closed loop fuel control.

Mar 04, 2015 | 2000 Ford Focus

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How to check transmission fluid in a 1997 pontiac sunfire


Check with engine running, trans hot (ie: has runn down the road 15 minuets) car in park engine idling, remove dipstick, wipe and re-insert then remove and read level on stick.

Aug 26, 2014 | 1997 Pontiac Sunfire

1 Answer

Why does my2004 gmc envoy xl slt idle high at startup?


This is normal. All vehicles idle high at start up to get the engine to operating temperature. This is known as open loop. The computer ignores signals from O2 sensors to keep your engine running safely. Once it has warmed up, it will enter closed loop, and you will see a decrease in idle.

Jul 05, 2014 | 2004 GMC Envoy XL

1 Answer

Replaced iac valve engine will not idle


wow , no year stated. amazing....
which engine? size and gAS or diesel>?
stalls only hot?
is thermostat good and holding 180F or more???????
why gue$$ ?

Stalls have huge causes.
1: the ISC sticks is but 1 of 50 causes (have list, i pass)
misfire is the other
the EFI Tries very very hard to stop stalls, (opens ISC/IAC 100%)
if it can't. it stalls.
why did it stall, lots of ways.
Misfire from too lean or flooding.
EGR stuck open. is #1 all top DOG for stalls.
EGR can stick open, and when it does, it will stall

no the big questions, not ever answered here ever.....>>
can you save the stall with a fast right foot action.?
easy
tad hard.
impossible.
The answer here, can save tons of hard work.

and is the CEL glow key on, in the dash? Check engine light at key on
then stay out driving, NO< why not scan this car.
do not ever ignore this lamp, scan it or spend eternity fixing car.
buy a scan tool, and learn to use it.
learn how sensors. work and how they read.
learn what closed loop is. (if not in CL hot , fix that now)

if the engine drops closed loop, hot, at idle this means
fueling is out of control and idle is only a victim.
check closed loop status hot engine. and win.


here are all the steps 1 by one on a good engine.

this is just a typical 1.6L 16valve SOHC engine.
MAF based injection, here. any motor with maf , like this..
http://www.fixkick.com/ECU/Authority/A_Full_OBD2_scan.html


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1 Answer

Engine speeds up and down peugeot 106 independance 2000/01


sounds like either ur iac /or ur tps more then likly ur tps, throtle positioning sensor it controls ur feul intake more feul harder the engine runns, but iac idle air control it tells car more air higher idle less air tells tps less gas lower idle there all linked together have it put on a scanner that will narrow ur possiblities right down to the problem

May 26, 2013 | Peugeot Cars & Trucks

1 Answer

I have a 1997 rav4..4cyl stalls when taking off from a stop.i have a scan tool.at idle engine load % is 30-40..tps % 19 no codes.happens more when cold ant turning.it stalled today, and rolling nuetral...


Since you are not getting any codes , I think your problem may be in the fuel system.Have you checked the fuel pressure / regulator? Or any voltage drop in the system.

Mar 08, 2010 | Toyota RAV4 Cars & Trucks

1 Answer

ECM switches from closed loop to open loop at idle after warmup


WHEN ENGINE GOES CLOSED LOOP TO OPEN LOOP.YOU HAVE A RICH FUEL MIXTURE.YOU HAVE A VACUUM LEAK.BY YOU HAVING ROUGH IDLING.AND A HIGH MILEAGE ENGINE I WOULD DO A COMPRESSION TEST OR CYLINDER LEAK DOWN. CHECK FOR LEAKING VALVES AND LOW COMPRESSION .THEY BOTH WILL CAUSE ENGINE TO IDLE ROUGH CAUSE MISFIRE.CAUSE OPEN LOOP CONTAMINATE HO2 SENSOR CAUSE A RICH FUEL MIXTURE.

Sep 30, 2009 | 1984 Oldsmobile Delta 88

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