Question about 1994 Toyota Camry

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My tachometer reading is false. chekd the wire with coil. still the reading is low when gas is pumped. the reading is false and low..

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  • zahedzeeshan Aug 20, 2010

    nothing to do with alternator... its the meter. cirtcuit.

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It would be problem with alternator , please get cheked that.

Posted on Aug 19, 2010

  • zahedzeeshan Aug 19, 2010

    where is the alternator??

  • alternetor is in engine compatment in side bonnet which run drive belt.

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I have a 99 Mitsubishi Eclipse, it all of a sudden died. I tried to start it again and all it would do is crank over without actually starting up. Its not fuel pump. What else could be the problem?


Many things can make it stop and not restart. Even though the gas gauge reads it may be false and the car could be out of gas. The gas tank could have water in it especially if you just got gas from a station. If you think that there is water in the tank add a bottle of "heat" or tank dryer to the tank. A bad fuel filter or low fuel pressure, bad ecm(computer), bad ignition module or ignition components(coil etc), bad fuel injectors, bad crankshaft position sensor, bad ignition switch, bad relay(s) or blown fuse(s), security system/ignition key, or bad connector(s)/wiring issues. The best place to start is checking the fuses and scanning the computer for codes.

Feb 06, 2016 | Mitsubishi Cars & Trucks

1 Answer

Fuel guage sometimes read empty when there is gas in the tank?


Check that there are no holes in the float. If the fuel is getting into the float, it will give a false reading. Another thing is to check the ground on the float sensor. If it's not connected tightly, it will create a false reading too.

Mar 03, 2015 | 2002 Mitsubishi Lancer

1 Answer

Speedometer works but not the rpm gauge 98 Tahoe 5.7


The speedometer is operated differently then the tachometer. Tachometer
The tachometer displays the engine speed in revolutions per minute (RPM). Voltage pulses are taken from the ignition control module (ICM) (Gasoline) or the generator (Diesel) and sent to the tachometer. Solid state circuits convert the pulse frequency in order to move the pointer of the tachometer.

Tachometer Inoperative (Gas)
Step
Action
Value(s)
Yes
No
1
Did you perform the OBD II System Check been performed?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check (5.0L/5.7L); Powertrain On Board Diagnostic (OBD) System Check (7.4L)
2
Remove the I/P Cluster.
Disconnect the Ignition Coil connector.
Connect a J 39200 DMM (continuity) between I/P Cluster connector cavity 6 and ground.
Is continuity present?
--
Go to Step 3
Go to Step 4
3
Locate and repair the short to ground in CKT 121 (WHT) between the Ignition Coil and the I/P cluster. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Refer to Instrument Cluster System Check
--
4
Connect a J 39200 DMM (continuity) from I/P Cluster cavity 6 to ignition coil connector cavity B.
Is continuity present?
--
Go to Step 5
Go to Step 6
5
Replace the I/P Cluster. Refer to Instrument Cluster Replacement .
Is the repair complete?
--
Refer to Instrument Cluster System Check
--
6
Locate and repair the open in CKT 121 (WHT) between the Ignition Coil and the I/P Cluster. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Refer to Instrument Cluster System Check

Dec 26, 2014 | 1998 Chevrolet Tahoe

1 Answer

Turns over but no start


WHAT ENGINE ?????? 4, 5.2 or 5.9 Liters?
Fuses are First, always for ever. on electrics or EFI.
dry rail cranking ! you must crank it.
(if you have liking injector or leaking regulator it can drop fast ,so crank on) yes, 2 men or 1 and small boy, LOL
so check voltage at the pump cranking. please stop guessing.!

the ECU commands up the PUMP , cranking or running
so crank and read voltages at pump or at FP relay.

pump activating, is by premissives. not just a key on event
due to crash and burn rules. (unlike on TV)
same with injection. (spark must be good)
first , buy your self a voltmeter (DMM/DVM) its a very easy tool to use
and on volts, mode, totally harmless to you or car. !!!

be aware, that on some cars
if there is no spark, there is no fuel pumping
or it might take a second to detect no spark and the pump is cut
or on one of my cars the pump works the engine starts for 1second
and the ECU sees no spark (dead tachometer ) even though spark is
good the ECU sees no spark and ALL fuel is cut, injectors and fuel pump relay ( you never monitored the action of the relay?. and its dead.? i bet?) spark monitoring can fail with good spark, !!!
the path, on all cars.............. pins and colors change to confuse...
-------------------------------------------------------------------------
the FUEL pump relay is in the PDC
it has 4 pins, its just a 4 pin std, relay.
a coil and a contactor
if the coil is not HOT (12v across the coil) cranking
there will never ever be pump action.
so the first test is to check the PUMP relay coil wires.
the coil hot side is 12vdc key on
the other wire, marked. C20 DB (dark blue?)
it is 12v keyon
and when you crank the PCM grounds this wire and it must go
to 0v, (0.5v max) if not the PCM is in CUT FUEL MODE.
99.999999% sure, its not a bad PCM. see?
if this line dont go low you must find out why the PCM is in cut fuel.
this is pretty easy,its called a scan tool. got one
they only cost $9 (ask)
if the coil is hot at C18 relay pin and 0v at C20
this state the Relay is energized.
so we check pins C16 and 17,of said relay
we check C16 first. its 12v even key off, hot at all times if not, the fuse is blown. (or battery totally dead)
then crank and pin C17 goes hot(note my order of testing, its not random) C17 dead, is bad relay, C17 12v, cranking is dead pump.

C17 is DG/wht wire, (darkgreen.with white stripe?)
if this wire is cut the pump is dead
so is the pump dead, if hot this wire is, and the pump ground wire is cut.
when i say cut that means cut or corrosion,etc.
eg; gross resistance in the path.

takes 4min to show, and longer to type this...
the G305 pump ground black must not be bad. (12v on black wire is just that while cranking)

i will not fully cover PCM permissive on the pump.
but will do so in short.
1: ECU sees spark loss, for any reason.. even when good real.
All ECu do this differently. many read the spark coil primary
wires of inductive (EMF) kickback , on one or all coils.
other cars its just the tachometer signal dead.
2: CMP errors (cam sensor)
3: CKP errors. (crank sensor)
4: TPS stuck at WOT , usually only cuts injectors.. (unflood mode)


ive built and programmed PCMs from scratch and am aware of all pitfalls here. am.
if have the drawings, ask.
or log in to Alldata.com

again, connect the $9 scan tool
keyon
crank for 5 seconds. (min) max 15)
does RPM roll from 0 to near 300? no? bingo.
does DTC 340 or 350 store as you crank or release key
and do not turn off key, wait 1 second, see if DTCs are stored
in the PCM looking with any scan tool made..
if yes, BINGO !!!!

Nov 30, 2013 | 1998 Jeep Grand Cherokee

1 Answer

Got a new tach ,my car doesn't have one, how do I hook it up to a '90 buick 3.3 with electronic ignition? The "instructions" only show how to hook up to standard ignition.


Hello! Your vehicle is equipped with a distributor-less ignition systems; C-31...Does your engine have a "coil pack"? As in two cylinders per coil? The coil pack has a two wire connector at the top which is Ground and +12 volts...At the bottom are 2 connectors...The one on the left is a 4 wire and to its right a 2 wire...the one you are interested in is the 4 wire connector...Reading from left to right...Pin 1=Ground...Pin 2=Reference voltage...Pin 3=6X...
And Pin 4=Tachometer
...Hook the Tachometer wire (probably a green lead) to Pin 4...There is the possibility that the ignition module has a Tachometer input connection...If so use it...If not use Pin 4...

Guru...saailer

Dec 26, 2010 | Buick Skylark Cars & Trucks

1 Answer

Toyota camry 92. when i pump my gas the engine slowly stops.. this happens suddenly once in a while not always.. i chenged fuel pump, plugs, sensor, chekd distributor, chekd controller.. washed my fuel...


This symptom indicates that there is not a correct ratio of air to fuel ratio of 14.6. When more gas is given, there must be more air available to make up the golden ratio of 14.6 to have good mixture for good combustions. You already check for fuel supply, the next thing is to check the air supply. Check out air filter, clean the throttle valve, Air mass flow controller. If all of these didn't make an improvement then the last thing is the Fuel distribution calibration. Cheers.

Aug 17, 2010 | 1992 Toyota Camry V6

1 Answer

Where a could connect a tachometer on my celica


The tach will need power + and -.
Then to read engine speed it will need one wire to the + side of the coil.

Apr 18, 2010 | 2000 Toyota Celica

1 Answer

98 civic lx where is ignition coil?? ++


IT'S A BLUE WIRE ON THE BACK OF THE CONNECTOR THAT WOULD NORMALLY GO TO THE FACTORY TACHOMETER IN THE DASH. YOU HAVE TO REMOVE THE DASH GAUGE CLUSTER TO GET AT THE CONNECTOR. THE CONNECTOR WILL NOT BE PLUGGED INTO ANYTHING IF YOU DON'T HAVE A FACTORY TACHOMETER (DX, CX, HX ETC...YOU WILL HAVE TO SPLICE INTO OR CUT THE BLUE WIRE FROM THE PLUG. IT GOES TO TACH SIGNAL WIRE ON YOUR NEW TACH.

Jun 11, 2008 | 1998 Honda Civic

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