Question about 1994 Geo Metro

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When cold has no accerlation

This vehicle runs well when warm. i hooked up a timing light when it was cold and started it. The timing was retarded for about 10 seconds then it smoothed out and ran well, and the timing advanced. Have you ever run across this problem. It is a 1994 geo metro 3 cylinder, 1.0 lit. . I know it does not hve power but I know when it is not running right.

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I've actually had the same problem and it was my air intake. When it was cold all the moisture in the air would freeze in my air intake and basically make it impossible for my metro to breath.
All I did was remove the air filter to expose the intake. Then, asked a friend to get behind the wheel and rev the engine. All the while, I sprayed WD-40 inside the intake. The WD-40 would break up existing ice buildup and prevent any more from forming.

Posted on Oct 15, 2008

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Idleing problems, goes up and down


You need to take it an have a professional type scan tool hooked up an have sensor data parameters checked . Could have a mass air flow sensor problem , IAC - idle air control motor. If the check engine light was on before ,it will come on again , after a couple of start up's from cold to warmed up. Regular gas won't hurt it , maybe some pinging (Spark knock ) But the knock sensor will take care of that . (Retard timing ).

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My 1983 Lincoln Mark VI runs grest when cold but once warmed up it seems to miss-fire??


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1996 camero v8, after running car and it gets warmed up it quits runnung, after it cools off it starts with no problem??


check your coolant tempurature sensor. sounds like the symtoms of a bad sensor.--- poor cold idle, stalling, ( rich mixture) retarded timing, slow idle speed, cold hesitation or stumble, poor fuel milage, will also ****** timing. hope this helps!

Jul 26, 2011 | 1996 Chevrolet Camaro

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Received code P1400 engine light on what would cause this code?


GMC Truck Envoy - 2WD ' Envoy, Rainier, TrailBlazer, Ascender (VIN S/T) Service Manual ' Document ID: 1655997

DTC P1400
Diagnostic Instructions
• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor:
DTC P1400: Cold Start Emission Reduction Control System

Circuit/System Description
The catalytic converter must be warmed to efficiently reduce the emissions. The cold start strategy is to reduce the amount of time it takes to warm the catalytic converter. During a cold start, the engine idle speed is elevated and spark timing is retarded to allow the catalyst to warm quickly. This diagnostic monitors the following to build an exhaust energy model:

• Engine speed
• Spark advance
• Throttle position
• Engine airflow
• Engine coolant temperature
• Engine runtime
• Park/neutral position
• Vehicle speed

The actual model is then compared to the expected exhaust energy model.

Conditions for Running the DTC
• A cold start has been detected.
• The vehicle speed is less than 2 km/h.
• The engine is at idle with no input from the accelerator pedal.
• The airflow per cylinder is greater than 80 mg/cylinder.
• DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0335, P0336, P0351, P0352, P0353, P0354, P0355, P0356, P0502, P0506, P0507, P0601, P0602, P0603, P0604, P0606, P0607, P062F, P0641, P0651, P1101, P1516, P1682, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, P2176, P2610 are not set.
• This DTC runs for 15 seconds within the first 70 seconds of start up. This diagnostic runs once per trip when a cold start has been determined.

Conditions for Setting the DTC
The actual exhaust energy model does not match the expected exhaust energy model.

Action Taken When the DTC Sets
• The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

Conditions for Clearing the MIL/DTC
• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
Any loading of the engine that lowers engine RPM, such as with partial application of the clutch, during the first 70 seconds of engine run time may set this DTC.
Circuit/System Verification
Allow the engine to cool. Monitor the Cold Startup parameter. This should indicate Yes. Start and idle the engine for at least 2 minutes. DTC P1400 should run and pass.

Circuit/System Testing
• Inspect the air intake system for the following:
- If any other DTCs are set, diagnose them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
- Modified, damaged, or restricted
- Dirty or deteriorating air filter element
- Crankcase ventilation system for correct operation--Refer to Crankcase Ventilation System Inspection/Description.
- Water intrusion
- Vacuum leak and other un-metered air downstream of the mass air flow (MAF) sensor
- Intake manifold leak

• Inspect the exhaust system for the following:
- Water intrusion
- Exhaust leak
- Damaged, restricted, modified or enhanced exhaust system--Refer to Symptoms - Engine Exhaust .


Hope helps; keep us updated

Jun 30, 2011 | 2006 Chevrolet Trailblazer Ext

1 Answer

2003 mountaineer runs great cold, very cold, and we have been very cold in Michigan but once the vehicle warms up it begins to stall at stop lights and sometimes when slowing to a stop,I also noticed a...


Can't quess at something like that

The vehicle, as with any issues, needs
about 20 minutes of your time and explanation

Then you go for a road test with a mechanic

No road test, don't leave it and hope for the best

You authorize no other services, that might
be pitched

Feb 26, 2011 | Mercury Mountaineer Cars & Trucks

1 Answer

Truck runs fine when cold but when it gets warm loses power and wont accerlate


your air filter is not clean andthe fuel system must cleaned up

Nov 16, 2010 | 1988 Ford Ranger

1 Answer

The car will pop alittle when you try to start it...It wants to start but wont..replaced the fuel filter,plugs.I have spark to all plugs..I can squirt gas into the intake and it will run but will not idle...


usually when a vehicle backfires, it is caused by the timing or a bad crank sensor. symtoms of a bad coolant sensor are--poor cold idle, stalling, ( rich mixture,retarded timing) slow idle speed, cold hesitation or stumble, and poor fuel milage. check coolant sensor first. good-luck!!

Aug 08, 2010 | 1989 Audi 80

2 Answers

Engine will not turn over when warm/hot. Starts great whn cold or after sitting for an hour to two hours.


Check you timing and make sure is it correct. Being to far advanced or retarded will present the issue you present.

May 10, 2010 | 1989 Ford Mustang

1 Answer

2000 4.0 sohc explorer cold start erratic, almost stalls levels off at 900 rpms, no codes,replaced iac.- iat, tps,ect,ckp,cmp sensores within spec. timing chains rattle at start up HEELP!!!!


timing chains rattle at start up HEELP!!!! <<<<< This Will NOT Set A Code And WILL Cause EP Engine Performance Problems, If the Timing Chain DEVIATES More than 8 Degrees it is NO GOOD for OPTIMUM Engine performance.
The Fact that you have NO CODES Lieves DIAGNOSING it Fairly Simple. Morning Starts (COLD START) is a CLOSED LOOP Condition and by the time it warms up it closes LOOP and the ECM takes over the Timing, and compisates for the LOOSNESS of the Timing Chain by ADVANCING / RETARDING the Timing. thus Good Running when Warmed up. Hope & I Wish you Good Luck with it.
Feel Free to Fallow up with Me by Email. my Screen name here
at aol.com is my Email address

Nov 09, 2009 | 2000 Ford Explorer

1 Answer

1989 ford f150 w/ 5.0 liter..... engine light on


I would check the oil pressure of the engine. The reason is the timing chain tensioners are run with oil pressrue. I think your timing chain tensioners are leaking down when engine is getting to operating tempature . The oil is thinning down as warms up , as it should to lubercate . I would check compression and do a cylinder leak down test on all the cylinders. Then if the compression is good and the cylinder leak down is good. I would change all the timing components, ( chain, timing gears, timing chain tensioners )

Good Luck , I hope this helps.

Apr 18, 2009 | 1989 Ford F 150

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