Question about Mazda B2200

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I just bought this truck when cold it can not speed up when hot it speeds is fine but runs very rich at low speed.

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Mass air meter

Posted on Jul 21, 2009

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1 Answer

Normal idle speed when cold once hot low idle speed


will be a sensor problem need to get the OBD read by a suitable mechanic

Mar 12, 2014 | Renault Cars & Trucks

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Engine Overheating due to Radiator Fan Motor


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Replacing the radiator fan and cowling was 2-3 hours work even with some help from another person.

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1 Answer

2000 tundra v6 5-speed cold start truck runs great, park it for 20-30 min it will start fine but after going 1/4 mile it dies, looses power. pull over and it will backfire and sputter until it eventua


bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

Jan 31, 2014 | 2000 Toyota Tundra

1 Answer

Did tune up but still acts like it's missing once in a while


skipped filters?
hiccup.s can be lots of things,
so tell when the hicup ,er misfire happens
hot or cold engine. ? or both.
at any speed. , only fast right foot?, or only wide open throttle?
only on hills. ?
so far , no miss at idle or slow speed.

Jan 26, 2014 | 1998 Jeep Wrangler

1 Answer

1995 jeep gr cherokee laredo jumps when first star in morning and runs rough when ac or heat on


my guess, car unseen.
car has an A/T trans, and all A/T jump from park to drive
selection is made on a cold engine, due to the very fast idle speed.
what was the park and cold idle speed. and out door temps.
the lower out door temps, make idle speed , cold engine, even higher
but when the engine reaches 180F or more and holds, the RPM
is about 800 RPM (the FSM tells the exact amount and does vary for the unstated engine option) so at 800 the tranny don;t lurch, did it on a hot engine. so if idle speeds are wrong say so and say it with engine temps. or its all meaningless.
next :
runs rough, the engine (even parked?) is called misfire.
misfire on a good engine (full compression)
is:
1: bad spark (or never had a tune up ever) every 60k miles.
2: bad fueling. too rich, too lean (low idle) bad injectors (stuck or clogged, or wrong fuel pump pressure or bad Fuel pressure regulator)
3: bad fuel.

there is a test for each possible failure. all very simple test.
it takes $80 in gauge tools to find engine problems.

Dec 30, 2013 | 1995 Jeep Cherokee

1 Answer

1995 jeep cherokee heater gets cold when slowing down or stopped and get engine temp goes up. is fine at higher speed though


If the coolant is full in the radiator, the only thing I could think of is that the water pump may have worn impellers that do not circulate the coolant well enough at low speed, but does better at higher speeds.

Dec 13, 2013 | 1995 Jeep Grand Cherokee

1 Answer

Increase then decrease idle when engine is cold especially


cold engine idle surge. (problem)
RPM range of surge not stated
300-700 or 800 to 1500? (range is critical to diagnosis)

bad fuel
running summer fuel in winter (running old fuel?)
needs a tune up bad, see the list in the operator guide.
idle speed controller,sticking or EGR valve same. (clean them)
location not stated, so cant guess about local air temps.?
no other symptoms, lack of engine power? etc?
was it ok last week, or better, when was the last time it was OK?
1week, 1year?
surge , causes, on a tuned engine might be:
1: too lean. so lean the ISC can not control idle. rpm low, stalling
2: too rich, flooding, stalling, spark plugs foul (look at them)
3: weak compression in 1 or more cylinders.
4: bad spark.
5: air leaks, in the plenum causing , ISC to lose control.
why high RPM?

especially?
well that means it fails hot too.
and there is a simple tests. for hot surge.
is engine fully hot? 180F and holds solid there?
say rpm is about 800
and you turn on head lights, heater fan and (not AC) and defrost.
the RPM must hold or the ISC is failing.
ISC -= idle speed controls. (all EFI has this function)

Oct 28, 2013 | 1996 Honda Prelude

1 Answer

Cold start running rich


Hi Malcolm, The cold start operation on all vehicles increases and enriches the fuel to air ratio, making it easier for the engine to start. Most systems also incorporate an 'up idle' which runs the engine at a faster speed until the temperature begins to rise. Regards John

Nov 24, 2012 | 1991 Honda Civic

1 Answer

97 wrangler 2.5 running rich


rich,101
this is a MAP , speed density EFI fueling system,,,,
not misfiring.
in no order,
  1. map reads, low all the time cause rich, (low means low vacuum that is real) the ECU sees that and adds huge fueling.
  2. fuel pressure way too high bad PFR.
  3. injector leaking i do an injector leakdown test, or balance test, like the book shows. (and has 3 causes)
  4. front 02 sensors struck lean , forced ECU to go RICH. Any exhaust (its air sucking in) leaks, cause the 02 to go nuts or stick at 0v all the time. and RICH will happen. unplug it , get better?
we use simple tools to find this.
is vacuum at 19 inches HG at idle.? hot? sealevel #s/
???? clean the map yet?

Sep 08, 2012 | 1997 Jeep Wrangler

1 Answer

2003 ford escape fans do not run in till the a/c is turned on.


There are four relays for the cooling fans .low speed control , medium speed , high speed fan control relay 2 , high speed fan control relay 1, there is also a engine cooling fan resistor .The engine coolant temp. sensor would most likely cause the check engine light to be on . There is also a dual pressure switch , this is for the A/C . The cooling fans will be turned on at 213 degress low speed , high speed at 226 degress . If you had factory scan tool or a professional type you could view coolant temp data in pcm , you could also energize the relays to see if the system is operating normally . There are other repair shops beside dealers

Mar 28, 2017 | 2003 Ford Escape

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